M670 Datasheet, PDF (1/6 Pages) Integrated Circuit Systems – VOLTAGE CONTROLLED SAW OSCILLATOR

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 [phone]