(ICS300 - ICS302) QTClock Quick Turn Clock Synthesizer
Description
ICS300/ICS301/ICS302 QTClock™ Quick Turn Clock Synthesizer
Description
The ICS300 and ICS301 QTClocks™ generate a high quality, high frequency clock output and a reference from a low frequency crystal or clock input.
They are designed to replace crystals and crystal oscillators in most electronic systems.
The ICS302 can accept a higher frequency clock input to generate up to 200 MHz.
The devices contain a One Time Programmable (OTP) ROM which is factory programmed with the PLL divider values to output a broad range of frequencies, from 6 to 200 MHz, allowing customer requests for different frequencies to be shipped in 1-3 days.
Using Phase-Locked-Loop (PLL) techniques, the devices run from a standard fundamental mode, inexpensive crystal, or clock.
They are smaller and less expensive than one oscillator.
Features
• Packaged as 8 pin SOIC • Quick turn frequency programming allows samples in one to three days • Replaces nearly any crystal or oscillator • ICS300 produces up to 100 MHz at 3.
3V, ICS301 produces up to 200 MHz at 3.
3V ICS302 accepts up to 125 MHz clock input • Easy to cascade with ICS5xx series • Input crystal frequency of 5 - 27 MHz • Input clock frequency of 2 - 125 MHz • Low jitter - 50 ps one sigma • Compatible with all popular CPUs • Duty cycle of 45/55 • Operating voltages of 3.
0 to 5.
5V • Full CMOS level outputs with 25mA drive capability at TTL levels • Tri-state output + PLL power down pin • Advanced, low power CMOS process
Block Diagram
VDD GND
Crystal or clock input
OTP ROM with PLL Divider Values
X1/ICLK
PLL Clock Synthesis and Control Circuitry
Output Buffer
CLK
Crystal Oscillator
X2
Divide Logic and Output Buffer
REF
PDTS (both outputs and PLL)
MDS 300QT E 1 Revision 111000
Integrated Circuit Systems, Inc.
• 525 Race Street • San Jose •CA•95126•(408) 295-9800tel• www.
icst.
com
ICS300/ICS301/ICS302 QTClock™ Quick Turn Clock Synthesizer
Pin Assignments
X1/ICLK VDD GND REF GND VDD GND REF 8 1 ICS300 7 2 3 ICS301 6 4 5 8 1 2 ICS302 7 ...
Similar Datasheet
