LXT905LE datasheet, PDF - EEWORLD Datasheet

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LXT905LE: DescriptionEthernet Transceiver, CMOS, PQFP32, MO-136BC, LQFP-32; CategoryWireless rf/communication Telecom circuit; File Size432KB，35 Pages; ManufacturerInphi Corporation

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LXT905LE Overview

Ethernet Transceiver, CMOS, PQFP32, MO-136BC, LQFP-32

LXT905LE Parametric

Parameter Name	Attribute value
Maker	Inphi Corporation
package instruction	LQFP,
Reach Compliance Code	compliant
ECCN code	5A991
JESD-30 code	S-PQFP-G32
length	7 mm
Number of functions	1
Number of terminals	32
Maximum operating temperature	85 °C
Minimum operating temperature	-40 °C
Package body material	PLASTIC/EPOXY
encapsulated code	LQFP
Package shape	SQUARE
Package form	FLATPACK, LOW PROFILE
Certification status	Not Qualified
Maximum seat height	1.6 mm
Nominal supply voltage	5 V
surface mount	YES
technology	CMOS
Telecom integrated circuit types	ETHERNET TRANSCEIVER
Temperature level	INDUSTRIAL
Terminal form	GULL WING
Terminal pitch	0.8 mm
Terminal location	QUAD
width	7 mm

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Cortina Systems

LXT905 Universal

10BASE-T Transceiver with 3.3 V

Support

Datasheet

The Cortina Systems

LXT905 Universal 10BASE-T Transceiver with 3.3 V Support (LXT905

Transceiver) is designed for IEEE 802.3 physical layer applications. It provides, in a single CMOS

device, all the active circuitry for interfacing most standard 802.3 controllers to 10BASE- T media.

The LXT905 Transceiver functions include the following:

• Manchester encoding/decoding

• Receiver squelch and transmit pulse shaping

• Jabber

• Link integrity testing

• Reversed polarity detection/correction.

The LXT905 Transceiver drives the 10BASE-T twisted-pair cable, with only a simple isolation

transformer, using a single 3.3 V or 5 V power supply. Integrated filters simplify the design work required

for FCC-compliant EMI performance.

The LXT905 Transceiver offers 10BASE-T connectivity solutions that support operations over an

extended temperature range, while providing features that increase reliability. The device has an

operational lifetime of at least ten years, with less than 100 failures per billion hours, and is available a

minimum of five years after the introduction of the product.

Applications

Access devices (DSL, Cable Modems, and

Set-top Boxes)

Routers/Bridges/Switches/Hubs

Telecom Backplane

USB to Ethernet Converters

Product Features

Transparent 3.3 V or 5 V operation

Integrated filters – Simplifies FCC compliance

Integrated Manchester encoder/decoder

10BASE-T compliant transceiver

Automatic polarity correction

SQE enable/disable

Four LED drivers

Full duplex capability

Power-down mode with tristate

Available in 28-pin PLCC and 32-pin LQFP

packages

Commercial Temperature Range (0 to +70ºC)

Extended Temperature Range (-40 to +85ºC)

LXT905 Transceiver

Datasheet

249271, Revision 5.1

5 November 2007

Contents

1.0

2.0

Pin Assignments and Signal Descriptions ................................................................................. 7

Functional Description.................................................................................................................. 9

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

3.0

3.1

Introduction ........................................................................................................................... 9

Controller Compatibility Modes ............................................................................................. 9

Transmit Function ............................................................................................................... 10

Jabber Control Function .....................................................................................................10

SQE Function ..................................................................................................................... 11

Receive Function ................................................................................................................ 12

Polarity Reverse Function...................................................................................................12

Collision Detection Function ............................................................................................... 13

Loopback Functions............................................................................................................ 14

2.9.1 Internal Loopback .................................................................................................. 14

2.9.2 External Loopback/Full Duplex .............................................................................. 14

Link Integrity Test Function................................................................................................. 14

Introduction ......................................................................................................................... 16

3.1.1 Termination Circuitry..............................................................................................16

3.1.2 Twisted-Pair Interface ............................................................................................ 16

3.1.3 RBIAS Pin .............................................................................................................. 16

3.1.4 Crystal Information................................................................................................. 16

3.1.5 Magnetic Information ............................................................................................. 17

Typical 10BASE-T Application ............................................................................................ 17

Dual Network Support - 10BASE-T and Token Ring .......................................................... 18

Simple 10BASE-T Connection............................................................................................ 20

Timing Diagrams for Mode 1 (MD1 = Low, MD0 = Low) ....................................................24

Timing Diagrams for Mode 2 (MD1 = Low, MD0 = High)....................................................27

Timing Diagrams for Mode 3 (MD1 = High, MD0 = Low)....................................................29

Timing Diagrams for Mode 4 (MD1 = High, MD0 = High) ................................................... 31

Application Information .............................................................................................................. 16

3.2

3.3

3.4

4.0

4.1

4.2

4.3

4.4

5.0

Test Specifications ...................................................................................................................... 21

Mechanical Specifications .......................................................................................................... 33

Figures

LXT905 Transceiver Block Diagram ................................................................................................6

LXT905 Pin Assignments ................................................................................................................ 7

LXT905 Transceiver TPO Output Waveform................................................................................... 9

Jabber Control Function ................................................................................................................ 11

SQE Function ................................................................................................................................ 12

Collision Detection Function .......................................................................................................... 13

Link Integrity Test Function ...........................................................................................................15

Intel* Controller Application (Mode 2) ............................................................................................ 18

LXT905 Transceiver/380C26 Interface for Dual 10BASE-T and Token Ring Support .. (Mode 4)19

LXT905 Transceiver/MC68EN360 Interface for Full Duplex 10BASE-T

(Mode 1) .................................................................................................................................. 20

Mode 1 RCLK/Start-of-Frame Timing ............................................................................................24

Cortina Systems

LXT905 Universal 10BASE-T Transceiver with 3.3 V Support

Page 3

LXT905 Transceiver

Datasheet

249271, Revision 5.1

5 November 2007

Tables

Mode 1 RCLK/End-of-Frame Timing ............................................................................................. 25

Mode 1 Transmit Timing ................................................................................................................ 25

Mode 1 COL Output Timing...........................................................................................................26

Mode 2 RCLK/Start-of-Frame........................................................................................................ 27

Mode 2 RCLK/End-of-Frame Timing ............................................................................................. 27

Mode 2 Transmit Timing ................................................................................................................ 28

Mode 2 COL Output Timing...........................................................................................................28

Mode 3 RCLK/Start-of-Frame Timing ............................................................................................29

Mode 3 RCLK/End-of-Frame Timing ............................................................................................. 29

Mode 3 Transmit Timing ................................................................................................................ 30

Mode 3 COL Output Timing...........................................................................................................30

Mode 4 RCLK/Start-of-Frame Timing ............................................................................................31

Mode 4 RCLK/End-of-Frame Timing ............................................................................................ 31

Mode 4 Transmit Timing ................................................................................................................ 32

Mode 4 COL Output Timing...........................................................................................................32

LXT905PC Package Specifications............................................................................................... 33

LXT905LC Package Specifications ............................................................................................... 34

Tables

LXT905 Transceiver Signal Descriptions ........................................................................................7

Controller Compatibility Mode Options .......................................................................................... 10

Loopback Modes ........................................................................................................................... 14

Suitable Crystals............................................................................................................................ 16

Absolute Maximum Values ............................................................................................................ 21

Recommended Operating Conditions ........................................................................................... 21

I/O Electrical Characteristics ......................................................................................................... 21

TP Electrical Characteristics.......................................................................................................... 22

Switching Characteristics .............................................................................................................. 22

RCLK/Start-of-Frame Timing ......................................................................................................... 22

RCLK/End-of-Frame Timing .......................................................................................................... 23

Transmit Timing ............................................................................................................................. 23

Miscellaneous Timing .................................................................................................................... 23

Cortina Systems

LXT905 Universal 10BASE-T Transceiver with 3.3 V Support

Page 4

LXT905LE Related Products

	LXT905LE	LXT905PC	LXT905LC	LXT905PE
Description	Ethernet Transceiver, CMOS, PQFP32, MO-136BC, LQFP-32	Ethernet Transceiver, CMOS, PQCC28, PLASTIC, LCC-28	Ethernet Transceiver, CMOS, PQFP32, MO-136BC, LQFP-32	Ethernet Transceiver, CMOS, PQCC28, PLASTIC, LCC-28
package instruction	LQFP,	QCCJ,	MO-136BC, LQFP-32	PLASTIC, LCC-28
Reach Compliance Code	compliant	compliant	compliant	compliant
JESD-30 code	S-PQFP-G32	S-PQCC-J28	S-PQFP-G32	S-PQCC-J28
length	7 mm	11.506 mm	7 mm	11.506 mm
Number of functions	1	1	1	1
Number of terminals	32	28	32	28
Maximum operating temperature	85 °C	70 °C	70 °C	85 °C
Package body material	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY	PLASTIC/EPOXY
encapsulated code	LQFP	QCCJ	LQFP	QCCJ
Package shape	SQUARE	SQUARE	SQUARE	SQUARE
Package form	FLATPACK, LOW PROFILE	CHIP CARRIER	FLATPACK, LOW PROFILE	CHIP CARRIER
Certification status	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Maximum seat height	1.6 mm	4.572 mm	1.6 mm	4.572 mm
Nominal supply voltage	5 V	5 V	5 V	5 V
surface mount	YES	YES	YES	YES
technology	CMOS	CMOS	CMOS	CMOS
Telecom integrated circuit types	ETHERNET TRANSCEIVER	ETHERNET TRANSCEIVER	ETHERNET TRANSCEIVER	ETHERNET TRANSCEIVER
Temperature level	INDUSTRIAL	COMMERCIAL	COMMERCIAL	INDUSTRIAL
Terminal form	GULL WING	J BEND	GULL WING	J BEND
Terminal pitch	0.8 mm	1.27 mm	0.8 mm	1.27 mm
Terminal location	QUAD	QUAD	QUAD	QUAD
width	7 mm	11.506 mm	7 mm	11.506 mm
Maker	Inphi Corporation	-	Inphi Corporation	Inphi Corporation

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