ICS614-01
16 pin Intel Graphics Clock Source
MDS 614-01 B
Integrated Circuit Systems 525 Race Street San Jose CA95126 (408) 295-9800tel (408) 295-9818fax
1
Revision 020199
Printed 11/14/00
ICRO
C
LOC K
PRELIMINARY INFORMATION
The ICS614-01 is a low cost, low jitter, high
performance clock synthesizer for Intel’s 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.
Block Diagram
Description
Features
Packaged in 16 pin SOIC
Uses fundamental 27 MHz input crystal
Supports Intel i752 graphics chip, popular video
encoders and decoders, and audio
Low jitter - 50 ps one sigma
Output Enable function tri-states outputs
25mA output drive capability at TTL levels
Advanced, low power, sub-micron CMOS process
5V±10% core voltage. Inputs and outputs can run
3.3V (or 5V) for easy system interface
Crystal
Oscillator
VDD
GND
Clock Synthesis
and Control
Circuitry
Output
Buffer
27 MHz crystal
Output
Buffer
48 MHz
Output
Buffer
ACLK
X2
X1
2
28.636 MHz or
35.4689 MHz
14.318 MHz or
17.7344 MHz
Output Enable (all outputs)
Output
Buffer
27 MHz
ASEL1:0
2
DSEL
Output
Buffer
13.5 MHz
Output
Buffer
÷2
÷2
VDDIO