SM3-038.88M datasheet, PDF - EEWORLD Datasheet

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SM3-038.88M: DescriptionULTRA MINIATURE STRATUM 3 MODULE; CategoryWireless rf/communication Telecom circuit; File Size413KB，36 Pages; ManufacturerConnor-Winfield; Websitehttp://www.conwin.com/; Environmental Compliance

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SM3-038.88M Overview

ULTRA MINIATURE STRATUM 3 MODULE

SM3-038.88M Parametric

Parameter Name	Attribute value
Is it lead-free?	Lead free
Is it Rohs certified?	conform to
Maker	Connor-Winfield
Parts packaging code	MODULE
package instruction	,
Contacts	28
Reach Compliance Code	unknow
JESD-30 code	R-XDMA-T28
Number of functions	1
Number of terminals	28
Maximum operating temperature	70 °C
Minimum operating temperature
Package body material	UNSPECIFIED
Package shape	RECTANGULAR
Package form	MICROELECTRONIC ASSEMBLY
Peak Reflow Temperature (Celsius)	NOT SPECIFIED
Certification status	Not Qualified
Nominal supply voltage	3.3 V
surface mount	NO
Telecom integrated circuit types	TELECOM CIRCUIT
Temperature level	COMMERCIAL
Terminal form	THROUGH-HOLE
Terminal location	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED

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SM3

ULTRA MINIATURE

STRATUM 3 MODULE

2111 Comprehensive Drive

Aurora, Illinois 60505

Phone: 630- 851- 4722

Fax: 630- 851- 5040

www.conwin.com

Application

The SM3 Timing Module is a

complete system clock module for

Stratum 3 timing applications and

conforms to GR-1244-CORE

(Issue 2), GR-253-CORE (Issue

3), ITU-T G.812 (Type 3) and ITUT

G813 (Option 2). Applications

include shared port adapters, data

digital cross connects, ADM’s,

DSLAM’s, multiservice platforms,

switches and routers in TDM,

SDH and SONET environments.

The SM3 Timing Module helps

reduce the cost of your design by

minimizing your development time

and maximizing your control of the

system clock with our simplified

design.

This product is compliant with all

required ROHS specifications.

Features

•

Small Package Size, 1.45 x

1.0 x 0.25 inches

•

Four Auto Select Input

References, 8 kHz - 77.76

MHz

•

Frequency Qualification and

Loss of Reference detection

for each input

•

Hitless Reference Switching

•

Master/Slave Operation with

Phase Adjustment

•

Manual/Autonomous

Operation

•

Bi-Directional SPI Port

Control

•

Three CMOS Frequency

Outputs - Output1 from

12.96 - 77.76 MHz, M/S

Output @ 8kHz, BITS

@2.048 MHz or 1.544 MHz

•

3.3V operation

•

ROHS Compliant

Bulletin

Page

Revision

Date

Issued By

TM052

1 of 36

07 NOV 2008

ENG

General Description

The SM3 timing module provides a clock output that meets or exceeds Stratum 3 specifications given in GR-1244-CORE (Issue 2),

GR-253-CORE (Issue 3), ITU-T G.812 (Type 3) and ITU-T G813 (Option 2). The SM3 features four reference inputs that will

auto-detect the following reference frequencies: 8 kHz, 1.544 MHz, 2.048 MHz, 12.96 MHz, 19.44 MHz, 25.92 MHz, 38.88 MHz,

51.84 MHz and 77.76 MHz.

The SM3 timing module can be configured during production to produce an output up to 77.76 MHz. This output is derived from

an onboard VCXO and must be specified when ordering. The BITS output selectable for either 1.544 or 2.048 MHz. The master/

slave output is 8KHz. The user communicates with the SM3 module through a SPI port. The user controls the SM3 operation by

writing to the appropriate registers . The user can also enable or disable SPI operation through a SPI_Enable pin.

The SM3 offers a wide range of options for the system designer. The bandwidth is SPI Por t-selectable from 0.025 Hz to 1.6 Hz.

0.098 Hz is the recommended operational bandwidth for SONET Minimum Clock and most Stratum 3 applications. The 8 kHz out-

put has an adjustable pulse width. The pull-in range is also adjustable to establish the desired reference frequency rejection lim-

its. A Free Run frequency calibration value can be written to the module to provide a high degree of accuracy in the free run mode.

The reference frequency for any given reference input is automatically detected. A wealth of status information is available

through the SPI Port registers. The user also has a choice between autonomous or full manual control operation.

In manual mode, the user controls the module operating modes Free Run, Hold Over or locked to a specific reference in nor-

mal mode. If the chosen reference is unavailable or disqualified the module automatically enters Hold Over.

In autonomous control mode, operational mode selection occurs automatically based on reference priority and qualification

status. When the active reference becomes disqualified, the module will switch to another qualified reference. If none is available,

it will switch to Holdover. In the revertive mode the module will seek to acquire the highest priority qualified reference. In the non-

revertive mode the module will not return to the previous reference even after it is re-qualified unless there are no other qualified

references.

Switching between references is hitless. Likewise, the output frequency slew rate is minimized during any change of operating

mode, including entry into and return from Free Run or Hold Over to protect traffic from transient-induced bit errors.

Reference Status information and the operating mode information is accessed through status registers. The module will set the

Interrupt pin (SPI_INT) low to indicate a status change. An Alarm pin is used to indicate failure of the active reference status.

Free Run operation guarantees an output within 4.6ppm of nominal frequency and Holdover operation guarantees the output

frequency will not change by more than 0.37ppm during the first 24 hours. Frequency accuracy is based on a TCXO for its small

size, low power consumption and outstanding performance over all environmental conditions.

The module operates on 3.3V ± 5% with a typical power draw of less than 500 milliwatts. The module operates over the 0° to

70°C commercial temperature range.

Functional Block Diagram

Figure 1

TRST

TCK

TDO

TDI

TMS

M/S REF

REF 1 - 4

RESET

MASTER SELECT

T1/E1

SPI_ENBL

SPI_CLK

SPI_IN

SPI_OUT

SPI_INT

Bus Interface

Reference Priority,

Revertivity and Mask

Table

Control

Mode

Reference

Selection

Reference Input Monitor

OCXO

EEPROM

DAC

VCXO

OUTPUT1

M/S_OUT

BITS_CLK

DPLL

APLL

LOS

LOL

HOLD_GOOD

Data Sheet #:

TM052

Page 2

Rev:

Date:

11/07/08

Specifications subject to change without notice

SM3-038.88M Related Products

	SM3-038.88M	SM3	SM3-019.44M	SM3-012.96M	SM3-025.92M	SM3-051.84M	SM3-077.76M
Description	ULTRA MINIATURE STRATUM 3 MODULE	ULTRA MINIATURE STRATUM 3 MODULE	ULTRA MINIATURE STRATUM 3 MODULE	ULTRA MINIATURE STRATUM 3 MODULE	ULTRA MINIATURE STRATUM 3 MODULE	ULTRA MINIATURE STRATUM 3 MODULE	ULTRA MINIATURE STRATUM 3 MODULE
Is it lead-free?	Lead free	-	Lead free	Lead free	Lead free	Lead free	Lead free
Is it Rohs certified?	conform to	-	conform to	conform to	conform to	conform to	conform to
Maker	Connor-Winfield	-	Connor-Winfield	Connor-Winfield	Connor-Winfield	Connor-Winfield	Connor-Winfield
Parts packaging code	MODULE	-	MODULE	MODULE	MODULE	MODULE	MODULE
Contacts	28	-	28	28	28	28	28
Reach Compliance Code	unknow	-	unknow	unknow	unknow	unknow	unknow
JESD-30 code	R-XDMA-T28	-	R-XDMA-T28	R-XDMA-T28	R-XDMA-T28	R-XDMA-T28	R-XDMA-T28
Number of functions	1	-	1	1	1	1	1
Number of terminals	28	-	28	28	28	28	28
Maximum operating temperature	70 °C	-	70 °C	70 °C	70 °C	70 °C	70 °C
Package body material	UNSPECIFIED	-	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED	UNSPECIFIED
Package shape	RECTANGULAR	-	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR	RECTANGULAR
Package form	MICROELECTRONIC ASSEMBLY	-	MICROELECTRONIC ASSEMBLY	MICROELECTRONIC ASSEMBLY	MICROELECTRONIC ASSEMBLY	MICROELECTRONIC ASSEMBLY	MICROELECTRONIC ASSEMBLY
Peak Reflow Temperature (Celsius)	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
Certification status	Not Qualified	-	Not Qualified	Not Qualified	Not Qualified	Not Qualified	Not Qualified
Nominal supply voltage	3.3 V	-	3.3 V	3.3 V	3.3 V	3.3 V	3.3 V
surface mount	NO	-	NO	NO	NO	NO	NO
Telecom integrated circuit types	TELECOM CIRCUIT	-	TELECOM CIRCUIT	TELECOM CIRCUIT	TELECOM CIRCUIT	TELECOM CIRCUIT	TELECOM CIRCUIT
Temperature level	COMMERCIAL	-	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL	COMMERCIAL
Terminal form	THROUGH-HOLE	-	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE	THROUGH-HOLE
Terminal location	DUAL	-	DUAL	DUAL	DUAL	DUAL	DUAL
Maximum time at peak reflow temperature	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED

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