SM3E-077.76M datasheet, PDF - EEWORLD Datasheet

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SM3E-077.76M: DescriptionULTRA MINIATURE STRATUM 3E MODULE; CategoryWireless rf/communication Telecom circuit; File Size396KB，36 Pages; ManufacturerConnor-Winfield; Websitehttp://www.conwin.com/; Environmental Compliance

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SM3E-077.76M Overview

ULTRA MINIATURE STRATUM 3E MODULE

SM3E-077.76M 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	32
Reach Compliance Code	unknow
app	SONET;SDH
JESD-30 code	R-XSMA-T32
Number of functions	1
Number of terminals	32
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	ATM/SONET/SDH SUPPORT CIRCUIT
Temperature level	COMMERCIAL
Terminal form	THROUGH-HOLE
Terminal location	SINGLE
Maximum time at peak reflow temperature	NOT SPECIFIED

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SM3E

ULTRA MINIATURE

STRATUM 3E MODULE

2111 Comprehensive Drive

Aurora, Illinois 60505

Phone: 630- 851- 4722

Fax: 630- 851- 5040

www.conwin.com

Application

The SM3E Timing Module is a

complete system clock module for

Stratum 3E timing applications and

conforms to GR-1244-CORE

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

3) and ITU-T G.812 (Option 3).

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 SM3E Timing Module

guarantees full Stratum 3E

compliance with a minimum of

effort and cost in the smallest

complete package available.

Features

Small Package Size,

2.05 x 1.25 x 0.75 inches

Eight Auto Select Input

References,

8 kHz - 77.76 MHz

Phase Buildout

Hitless Reference Switching

Better than 1ppb initial

Hold Over offset

Frequency Qualification and

Loss of Reference detection

for each input

Master/Slave Operation with

Phase Adjustment

Manual/Autonomous

Operation

Bi-Directional SPI Port

Control and Status

Reporting

Three CMOS Frequency

Outputs - Output1 from

1.544 - 77.76MHz, M/

S_Out@8KHz, BITS

@2.048 MHz or 1.544 MHz

3.3V operation

Bulletin

Page

Revision

Date

Issued By

TM054

1 of 36

07 Nov 08

ENG

General Description

The SM3E timing module provides a clock output that meets or exceeds Stratum 3E specifications given in GR-1244-CORE

(Issue 2), GR-253-CORE (Issue 3) and ITU-T G.812 (option 3). The SM3E features eight reference inputs. Each input 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 SM3E timing module can be configured during production to produce an output up to 77.76MHz. This output is derived

from an onboard VCXO and must be specified when ordering. The second output is a BITS output selectable for either 1.544 or

2.048 MHz. The master/slave output is 8KHz. The user communicates with the SM3E module through a SPI port. The user con-

trols the SM3E operation by writing to the appropriate registers. The user can also enable or disable SPI operation through a

SPI_Enable pin.

The SM3E offers a wide range of options for the system designer. The bandwidth is SPI Port-selectable from 0.00084 Hz to 1.6

Hz. 0.0016 Hz is the recommended operational bandwidth for Stratum 3E applications. The 8 kHz output has an adjustable pulse

width. The pull-in range is also adjustable to establish the desired reference frequency rejection limits. 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. 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 sta-

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

switch to Hold Over. 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.

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

frequency will not change by more than 0.012ppm during the first 24 hours. Frequency accuracy is based on a precision oven to

provide the stabilty required for Stratum 3E compliance.

The SM3E can be programmed to startup in any mode or bandwidth. The module may even be programmed to operate in a

fully autonomous mode with no further configuration required.

The module operates on 3.3V ± 5% with a typical power drain of less than 3W at turn on, dropping to approximately 1W @ room

temperature after warming up. The module operates over the 0° to 70° C commercial temperature range.

Phase buildout can be enabled or disabled by means of the SPI port.

Functional Block Diagram

Figure 1

TRST

TCK

TDO

TDI

TMS

M/S Input

Ref 1 - 8

Reset

M/S

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

Output 1

M/S Output

BITS_Clk

DPLL

APLL

LOS

LOL

Hold_Good

Data Sheet #:

TM054

Page 2

Rev:

Date:

11/07/08

Specifications subject to change without notice

SM3E-077.76M Related Products

	SM3E-077.76M	SM3E	SM3E-012.96M	SM3E-019.44M	SM3E-025.92M	SM3E-038.88M	SM3E-051.84M
Description	ULTRA MINIATURE STRATUM 3E MODULE	ULTRA MINIATURE STRATUM 3E MODULE	ULTRA MINIATURE STRATUM 3E MODULE	ULTRA MINIATURE STRATUM 3E MODULE	ULTRA MINIATURE STRATUM 3E MODULE	ULTRA MINIATURE STRATUM 3E MODULE	ULTRA MINIATURE STRATUM 3E 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	32	-	32	32	32	32	32
Reach Compliance Code	unknow	-	unknow	unknow	unknow	unknow	unknow
app	SONET;SDH	-	SONET;SDH	SONET;SDH	SONET;SDH	SONET;SDH	SONET;SDH
JESD-30 code	R-XSMA-T32	-	R-XSMA-T32	R-XSMA-T32	R-XSMA-T32	R-XSMA-T32	R-XSMA-T32
Number of functions	1	-	1	1	1	1	1
Number of terminals	32	-	32	32	32	32	32
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	ATM/SONET/SDH SUPPORT CIRCUIT	-	ATM/SONET/SDH SUPPORT CIRCUIT	ATM/SONET/SDH SUPPORT CIRCUIT	ATM/SONET/SDH SUPPORT CIRCUIT	ATM/SONET/SDH SUPPORT CIRCUIT	ATM/SONET/SDH SUPPORT 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	SINGLE	-	SINGLE	SINGLE	SINGLE	SINGLE	SINGLE
Maximum time at peak reflow temperature	NOT SPECIFIED	-	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED

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