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M670

VOLTAGE CONTROLLED SAW OSCILLATOR

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

Product Data Sheet

M670

VOLTAGE CONTROLLED SAW OSCILLATOR

GENERAL DESCRIPTION

The M670 is a VCSO (Voltage Controlled SAW

Oscillator) frequency source for low-jitter

clock generation. Its integrated SAW

(surface acoustic wave) delay line provides

low phase jitter. The M670 is available in a

range of center frequencies. Minimum

pull-range is ±50 ppm (wider pull-range available).

The M670 is well suited for phase-locked loop

implementations, clock and data recovery circuits, and

other timing applications for the telecom and optical

fiber networking markets (e.g., OC-48, OC-192).

PIN ASSIGNMENT (5 x 7mm SMT)

M670

(Top View)

FEATURES

◆ VCSO center frequencies from 155 to 700 MHz

(Specify center frequency at time of order)

◆ Low phase jitter 0.19ps rms typical (50kHz-80MHz)

◆ Low phase noise -70dBc/Hz @ 1kHz offset

◆ Differential 3.3V LVPECL output

◆ Single 3.3V power supply

◆ Very small 5 x 7mm SMT (surface mount) package

Figure 1: Pin Assignment

Sample of Available Output Frequencies

VCSO Center Frequency1 (MHz)

Applications

622.0800

SONET/SDH

625.0000

Gigabit Ethernet

644.5313

Gigabit Ethernet FEC

669.3265

SONET/SDH FEC

Table 1: Sample of Available Output Frequencies

Note 1: Specify VCSO center frequency at time of order

BLOCK DIAGRAM

M670

VIN

CLK_EN

SAW Delay Line

Phase

Shifter

FOUT

nFOUT

Figure 2: Block Diagram

M670 Datasheet Rev 12.1

Revised 09Apr2003

M670 Voltage Controlled SAW Oscillator

Integrated Circuit Systems, Inc. ● Communications Modules ● www.icst.com ● tel (508) 852-5400

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