M670 Datasheet Rev 12.1

Revised 09Apr2003

Integ r ated Circuit Systems , Inc. ● Comm unications Modules ● www.icst.com ● tel (508) 852-5400

M670

Integrated

Circuit

Systems, Inc.

Product Data Sheet

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).

◆ 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

Figure 2: Block Diagram

Sample of Available Output Frequencies

VCSO Center Frequency1 (MHz)

Note 1: Specify VCSO center frequency at time of order

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

M670

( T op View)

CLK_EN

VIN

FOUT

nFOUT

SAW Delay Line

Phase

Shifter

M670

M670 Voltage Controlled SAW Oscillator