PRELIMINARY INFORMATION
I C R O
C
LOC K
Description
The ICS614-01 is a low cost, low jitter, high
performance clock synthesizer for Intel鈥檚 i752
graphics systems. It includes frequencies for video
encoders and decoders. Using analog Phase-
Locked Loop (PLL) techniques, the device accepts
a 27 MHz fundamental mode crystal or clock
input to produce multiple output clocks. The chip
provides highly accurate video encoder and
decoder clocks, as well as the 48 MHz necessary
for the Intel graphics processor, and can produce a
24.576 MHz audio clock.
See the ICS604 or ICS513 for 8 pin devices that
supply 48 MHz from a 14.31818 MHz input.
ICS614-01
16 pin Intel Graphics Clock Source
Features
鈥?Packaged in 16 pin SOIC
鈥?Uses fundamental 27 MHz input crystal
鈥?Supports Intel i752 graphics chip, popular video
encoders and decoders, and audio
鈥?Low jitter - 50 ps one sigma
鈥?Output Enable function tri-states outputs
鈥?25mA output drive capability at TTL levels
鈥?Advanced, low power, sub-micron CMOS process
鈥?5V鹵10% core voltage. Inputs and outputs can run
3.3V (or 5V) for easy system interface
Block Diagram
VDD
GND
2
2
Clock Synthesis
and Control
Circuitry
VDDIO
Output
Buffer
Output
Buffer
ASEL1:0
DSEL
ACLK
28.636 MHz or
35.4689 MHz
14.318 MHz or
17.7344 MHz
48 MHz
13.5 MHz
27 MHz
梅2
Output
Buffer
Output
Buffer
27 MHz crystal
X1
X2
Crystal
Oscillator
梅2
Output
Buffer
Output
Buffer
Output Enable (all outputs)
1
Revision 020199
Printed 11/14/00
Integrated Circuit Systems 鈥?525 Race Street 鈥?San Jose 鈥A鈥?5126鈥?(408) 295-9800tel 鈥?(408) 295-9818fax
MDS 614-01 B
1
2
3
4
