MIC3000BML datasheet, PDF - EEWORLD Datasheet

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MIC3000BML: DescriptionFOM Management IC; CategoryWireless rf/communication Telecom circuit; File Size444KB，68 Pages; ManufacturerMicrochip; Websitehttps://www.microchip.com

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MIC3000BML Overview

FOM Management IC

MIC3000BML Parametric

Parameter Name	Attribute value
Is it Rohs certified?	incompatible
Maker	Microchip
Parts packaging code	DFN
package instruction	HVQCCN,
Contacts	24
Manufacturer packaging code	MLF
Reach Compliance Code	_compli
app	SONET;SDH
JESD-30 code	S-XQCC-N24
JESD-609 code	e0
length	4 mm
Humidity sensitivity level	2
Number of functions	1
Number of terminals	24
Maximum operating temperature	105 °C
Minimum operating temperature	-40 °C
Package body material	UNSPECIFIED
encapsulated code	HVQCCN
Package shape	SQUARE
Package form	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
Certification status	Not Qualified
Maximum seat height	1 mm
Nominal supply voltage	3.3 V
surface mount	YES
Telecom integrated circuit types	ATM/SONET/SDH SUPPORT CIRCUIT
Temperature level	INDUSTRIAL
Terminal surface	Tin/Lead (Sn85Pb15)
Terminal form	NO LEAD
Terminal pitch	0.5 mm
Terminal location	QUAD
width	4 mm
Base Number Matches	1

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MIC3000

Micrel

MIC3000

FOM Management IC

General Description

The MIC3000 enables the implementation of sophisticated,

hot-pluggable fiber optic transceivers with intelligent laser

control and Digital Diagnostic Monitoring Interface per SFF-

8472. It essentially integrates all non-datapath functions of an

SFP transceiver into a tiny 4mm x 4mm MLF

package. It also

works well as a microcontroller peripheral in transponders or

10Gbps transceivers.

A highly configurable automatic power control (APC) circuit

controls laser bias. Bias and modulation are temperature

compensated using dual DACs, an on-chip temperature

sensor, and NVRAM look-up tables. A programmable inter-

nal feedback resistor provides unprecedented dynamic range

for APC. Controlled laser turn-on facilitates hot-plugging.

An analog-to-digital converter converts the measured tem-

perature, voltage, bias current, transmit power, and received

power from analog-to-digital. Each parameter is compared

against user-programmed warning and alarm thresholds.

Analog comparators and DACs provide high-speed monitor-

ing of received power and critical laser operating parameters.

An interrupt output, power-on hour meter, and data-ready bits

add user friendliness beyond SFF-8472. The interrupt output

and data-ready bits reduce overhead in the host system. The

power-on hour meter logs operating hours using an internal

real-time clock and stores the result in NVRAM.

Communication with the MIC3000 is via an industry standard

2-wire serial interface. Nonvolatile memory is provided for

serial ID, configuration, and separate OEM and user

scratchpad spaces. Two-level password protection guards

against data corruption.

Features

•

APC or constant-current laser bias

Supports multiple laser types and bias circuit topologies

Drives external low-cost BJT for laser bias

Integrated digital temperature sensor

Temperature compensation of modulation, bias, and

fault levels via NVRAM look-up tables

Direct interface to SY88932, SY88982, SY89307 and

other drivers

NVRAM to support GBIC/SFP serial ID function

User writable EEPROM scratchpad

Diagnostic monitoring interface per SFF-8472

– Monitors and reports critical parameters:

temperature, bias current, TX and RX optical power,

and supply voltage

– S/W control and monitoring of TXFAULT, RXLOS,

RATESELECT, and TXDISABLE

– External calibration

Power-on hour meter

Interrupt capability

Extensive test and calibration features

2-wire I

C compatible serial interface

SFP MSA and SFF-8472 compliant

3.0V to 3.6V power supply range

5V-tolerant I/O

4mm x 4mm 24-pin MLF

package

SFF/SFP optical transceivers

SONET/SDH transceivers and transponders

Fibre channel transceivers

10Gbps transceivers

Free space optical communications

Proprietary optical links

•

Applications

Ordering Information

Part Number

MIC3000BML

Junction Temp. Range

–45°C to +105°C

Package

24-pin MLF™

MicroLeadFrame

and MLF are registered trademarks of Amkor Technology, Inc.

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

October 2004

M9999-101204

MIC3000

Micrel

Contents

General Description ................................................................................................................................................................................ 1

Features .................................................................................................................................................................................................... 1

Applications ............................................................................................................................................................................................. 1

Ordering Information .............................................................................................................................................................................. 1

Pin Configuration .................................................................................................................................................................................... 5

24-Lead MLF™ ......................................................................................................................................................................................... 5

Pin Descriptions ................................................................................................................................................................................. 5-6

Absolute Maximum Ratings ................................................................................................................................................................... 7

Operating Ratings ................................................................................................................................................................................... 7

Electrical Characteristics ................................................................................................................................................................. 7-11

Timing Diagram ..................................................................................................................................................................................... 11

Serial Interface Timing .......................................................................................................................................................................... 11

Address Map .......................................................................................................................................................................................... 12

Table 1. MIC3000 Address Map, Serial address = A0h ..................................................................................................................... 12

Table 2. MIC3000 Address Map, Serial Address = A2h ..................................................................................................................... 12

Table 3. Temperature Compensation Tables, Serial Address = A4h ................................................................................................. 13

Table 4. OEM Configuration Registers, Serial Address = A6h ........................................................................................................... 13

Block Diagram ....................................................................................................................................................................................... 14

Figure 1. MIC3000 Block Diagram ...................................................................................................................................................... 14

Analog-to-Digital Converter/Signal Monitoring ................................................................................................................................. 14

Figure 2. Analog-to-Digital Converter Block Diagram ......................................................................................................................... 15

Table 5. A/D Input Signal Ranges and Resolutions ........................................................................................................................... 15

Table 6. VAUX Input Signal Ranges and Resolutions ........................................................................................................................ 15

External Calibration .............................................................................................................................................................................. 16

Voltage .................................................................................................................................................................................................... 16

Temperature ........................................................................................................................................................................................... 16

Bias Current ........................................................................................................................................................................................... 16

TX Power ................................................................................................................................................................................................ 16

RX Power ................................................................................................................................................................................................ 16

Laser Diode Bias Control ..................................................................................................................................................................... 17

Figure 3. MIC3000 APC and Modulation Control Block Diagram ...................................................................................................... 17

Figure 4. Programmable Feedback Resistor ...................................................................................................................................... 17

Laser Modulation Control ..................................................................................................................................................................... 17

Figure 5. Transmitter Configurations Supported by MIC3000 ..................................................................................................... 17

Figure 6. VMOD Configured as Voltage Output with Gain ........................................................................................................... 18

Power ON and Laser Start-Up .............................................................................................................................................................. 19

Table 8. Shutdown State of SHDN vs. Configuration Bits .................................................................................................................. 19

Figure 7. MIC3000 Power-On Timing (OE=1) .................................................................................................................................... 19

Table 9. Shutdown State of VBIAS vs. Configuration Bits ................................................................................................................. 19

Table 10. Shutdown state of VMOD vs. Configuration bits ................................................................................................................ 19

Fault Comparators ................................................................................................................................................................................ 20

Figure 8. Fault Comparator Logic ....................................................................................................................................................... 20

Duty-Cycle Limiting ............................................................................................................................................................................... 20

Temperature Measurement .................................................................................................................................................................. 20

Diode Faults ........................................................................................................................................................................................... 20

Figure 9. Saturation Detector .............................................................................................................................................................. 21

Figure 10. RXLOS Comparator Logic ................................................................................................................................................. 21

Temperature Compensation ................................................................................................................................................................ 21

Table 11. Temperature Compensation Look-up Tables, Serial Address I2CADR + 4h .................................................................... 22

M9999-101204

October 2004

MIC3000

Micrel

Table 12. APC Temperature Compensation Look-Up Table, Serial Address I2CADR+4h ............................................................... 23

Table 13. VMOD Temperature- Compensation Look-Up Table, Serial Address I2CADR+4h .......................................................... 23

Table 14. IBIAS Comparator Temperature Compensation Look-up Table, Serial Address I2CADR+4h ......................................... 23

Table 15. Bias Current High Alarm Temperature Compensation Table, Serial Address I2CADR+4h .............................................. 23

Table 16. Range of Temperature Compensation Tables vs. LUTOFF .............................................................................................. 24

Figure 11. Examples of LUTOFF Operation ....................................................................................................................................... 24

Figure 12. Temperature Compensation Examples ............................................................................................................................. 25

Alarms and Warning Flags ................................................................................................................................................................... 26

Table 17. MIC3000 Events ................................................................................................................................................................. 26

Control and Status I/O .......................................................................................................................................................................... 26

Figure 13. Control and Status I/O Logic .............................................................................................................................................. 27

System Timing ....................................................................................................................................................................................... 27

Figure 14. Transmitter ON-OFF Timing .............................................................................................................................................. 27

Figure 15. Initialization Timing with TXDISABLE Asserted ................................................................................................................ 27

Figure 16. Initialization Timing, TXDISABLE Not Asserted ................................................................................................................ 28

Figure 17. Loss-of-Signal (LOS) Timing ............................................................................................................................................. 28

Figure 18. Transmit Fault Timing ........................................................................................................................................................ 28

Figure 19. Successfully Clearing a Fault Condition ............................................................................................................................ 29

Figure 20. Unsuccessful Attempt to Clear a Fault .............................................................................................................................. 29

Warm Resets .......................................................................................................................................................................................... 30

Power-On Hour Meter ........................................................................................................................................................................... 30

Table 18. Power-On Hour Meter Result Format ................................................................................................................................. 30

Test and Calibration Features ............................................................................................................................................................. 30

Table 19. Test and Diagnostic Features ............................................................................................................................................. 30

Serial Port Operation ............................................................................................................................................................................ 31

Figure 21. Write Byte Protocol ............................................................................................................................................................ 31

Figure 22. Read Byte Protocol ............................................................................................................................................................ 31

Figure 23. Read_Word Protocol .......................................................................................................................................................... 31

Page Writes ............................................................................................................................................................................................ 31

Figure 24. Four-Byte Page_Write Protocol ......................................................................................................................................... 32

Acknowledge Polling ............................................................................................................................................................................ 32

Write Protection and Data Security ..................................................................................................................................................... 32

User Password ....................................................................................................................................................................................... 32

Detailed Register Descriptions ............................................................................................................................................................ 33

Alarm Threshold Registers .................................................................................................................................................................. 33

Warning Threshold Registers .............................................................................................................................................................. 38

ADC Result Registers ........................................................................................................................................................................... 44

Alarm Flags ............................................................................................................................................................................................ 47

Warning Flags ........................................................................................................................................................................................ 48

Applications Information ...................................................................................................................................................................... 61

Controlling Laser Diode Bias ............................................................................................................................................................... 61

Figure 25. Example APC Circuit for Common-Cathode TOSA .......................................................................................................... 61

Figure 26. Example APC Circuit for Common Anode TOSA .............................................................................................................. 61

Choosing CCOMP ................................................................................................................................................................................. 62

Figure 27. Slew Rate vs. CCOMP Value ............................................................................................................................................ 62

Figure 28. Open Loop Unity-Gain Bandwidth vs. CCOMP ................................................................................................................. 62

Table 20. Typical Values for CCOMP ................................................................................................................................................. 62

Measuring Laser Bias Current ............................................................................................................................................................. 62

Interfacing To Laser Drivers ................................................................................................................................................................ 63

SY88912 3.3V 3.2Gbps SONET/SDH Laser Driver ............................................................................................................................. 63

Figure 29. Controlling the SY88912 Modulation Current .................................................................................................................... 63

October 2004

M9999-101204

MIC3000

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Table 21. Control Range of SY88912 Modulation Control Circuit ...................................................................................................... 63

SY88932 3.3V 3.2Gbps SONET/SDH Laser Driver ............................................................................................................................. 63

Figure 30. Controlling the SY88932 Modulation Current .................................................................................................................... 63

SY89307 5.0V/ 3.3V 2.5Gbps VCSEL Driver ....................................................................................................................................... 64

Figure 31. Controlling the SY89307 Modulation Current .................................................................................................................... 64

Laser Drivers Programmed via a Sink Current .................................................................................................................................. 64

Figure 32. Controlling the Modulation Current via a Sink Current ...................................................................................................... 64

Drivers With Monitor Outputs .............................................................................................................................................................. 64

Shutdown Output .................................................................................................................................................................................. 64

Figure 33. Redundant Switch Circuits ................................................................................................................................................. 65

Temperature Sensing ............................................................................................................................................................................ 65

Table 23. Contributors to Self-Heating ................................................................................................................................................ 65

Remote Sensing .................................................................................................................................................................................... 65

Table 22. Transistors Suitable for Use as Remote Diodes ................................................................................................................ 65

Minimizing Errors .................................................................................................................................................................................. 65

Self-Heating ............................................................................................................................................................................................ 65

Series Resistance with External Temperature Sensor ..................................................................................................................... 66

XPN Filter Capacitor Selection ............................................................................................................................................................ 66

XPN Layout Considerations ................................................................................................................................................................. 66

Figure 34. Guard Traces and Kelvin Return for Remote Thermal Diode ........................................................................................... 66

Layout Considerations ......................................................................................................................................................................... 66

Small Form-Factor Pluggable (SFP) Transceivers ............................................................................................................................ 66

Figure 35. Typical SFP Control and Status I/O Signal Routing (not to scale) ................................................................................... 66

Power Supplies ...................................................................................................................................................................................... 67

Figure 36. Power Supply Routing and Bypassing .............................................................................................................................. 67

Using The MIC3000 In a 5V System .................................................................................................................................................... 67

Package Information ............................................................................................................................................................................. 68

24-Pin MLF

(ML) ................................................................................................................................................................................ 68

M9999-101204

October 2004

MIC3000BML Related Products

	MIC3000BML	MIC3000	MIC3000_11	MIC3000BML-TR	MIC3000BMLTR
Description	FOM Management IC	FOM Management IC	FOM Management IC	IC TXRX OPTICAL MANAGEMENT 24MLF	Support Circuit, 1-Func, 4 X 4 MM, MLF-24

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