EUROQUARTZ LIMITED Blacknell Lane CREWKERNE Somerset UK TA18 7HE

Tel: +44 1460 230000 Fax: +44 1460 230001 email: info@euroquartz.co.uk web: www.euroquartz.co.uk

SYNCHRONOUS TIMING MODULES

Input Reference Frequency:

8kHz (A & B)*

Output Frequency:

<622.080MHz

Supply Voltage:

+3.3 Volts ±5%

Current Consumption:

120mA minimum

150mA typical

200mA maximum

Acquisition Time:

1 second

Capture/Pull-in Range:

±40ppm

Input Logic:

CMOS

Output Logic Levels

HIGH:

2.2V mon., 2.3V typ., 2.5V max.

LOW:

1.4V min., 1.5V typ., 1.6V max.

Output Capacitance:

10pF

Duty Cycle:

40%60% at 50% level

Rise and Fall Times:

220ps

Free Run Accuracy:

±20ppm maximum

Output Jitter:

1ps RMS,

12kHz to 20MHz bandwidth

Input Jitter Tolerance:

7microseconds

Jitter Filter Band Width:

10Hz max. 3dB loop response

Operating Temperature Range

COMMERCIAL:

0°~+70°C (Code ‘C’)

INDUSTRIAL:

-40°~+85°C (Code ‘I’)

Loss of Reference (LOR) and Loss of Lock (LOL) active alarms.

Two 8kHz reference inputs, CMOS levels.

Custom input frequencies upon request.

Continuous input monitoring of the two external frequencies.

Automatic FREE RUN mode on Loss of Reference (both A&B)

<622.080MHz LVPECL outputs with enable/disable functions

Free-run clock output

+3.3V SMD package, current 150mA.

TMB SERIES SYNCHRONOUS TIMING MODULES

* Custom inputs available.

FEATURES

GENERAL SPECIFICATION

OUTLINES & DIMENSIONS

PART NUMBERS

DESCRIPTION

TMB (Synchronous Timing Module, model B) series parts consists of a PLL

module that generates LVPECL outputs up to 622.080MHz from a low-

jitter VCXO. The module is locked to one of two 8kHz reference inputs,

selectable by the A/B SEL pad. PECL and complimentary PECL outputs can

be disabled by pad 1, the control pad. Pad 12 gives an alarm signal when

‘Loss Of Lock’ or ‘Loss Of Reference’ occurs. The module will enter into

Free Run mode, signaled from pad 9 FR status, when both REF A and REF B

are absent.

Applications include Line Cards and Service Termination Cards for SONET,

SDH, ATM and PDH network equipment.

FUNCTIONAL BLOCK DIAGRAM

8kHz Inputs, LVPECL outputs <622.080MHz

Page 1 of 2

Supply

Voltage

Package

Type

Operating

Temperature

Range

Input

Frequency

Output

Frequency

“3” for +3.3 V

TMB25

“C”=0°~+70°C

“I”=-40°~+85°C

Add “k”

for kHz

Output

Frequency

in MHz

Part numbers are generated according to this scheme:

EXAMPLE:

3TMB25-C-8K-622.080

Representing: +3.3V supply, model TMB (25mm square, 18 pad SMD

package), Commercial operating temperature range, 8kHz input

frequency and output frequency is 622.080MHz

ABSOLUTE MAXIMUM RATINGS

Vcc

Supply Voltage relative to ground

-0.5V to 4.0V

Vin

Input Voltage relative to ground

-0.5V to 5.5V

Tstg

Storage Temperature (Ambient)

-65° to +100°C

Tref

Maximum reflow Temperature

240°C

Symbol

Description

Rating