ICS9150-01 Datasheet, PDF (1/14 Pages) Integrated Circuit Systems – Pentium Pro™ and SDRAM Frequency Generator

Integrated
Circuit
Systems, Inc.
ICS9150- 01
Pentium Pro™ and SDRAM Frequency Generator
General Description
The ICS9150-01 generates all clocks required for high speed
RISC or CISC microprocessor systems such as Intel
PentiumPro. Two different reference frequency multiplying
factors are externally selectable with smooth frequency
transitions. An output enable is provided for testability.
High drive PCICLK and SDRAM outputs typically provide
greater than 1 V/ns slew rate into 30 pF loads. CPUCLK
outputs typically provide better than 1V/ns slew rate into
20 pF loads while maintaining 50 ±5% duty cycle. The REF
clock outputs typically provide better than 0.5V/ns slew rates.
Features
• Generates five processor, six bus, one 14.31818MHz
and 16 SDRAM clocks.
• Synchronous clocks skew matched to 250 ps window
on PCLKs and 500ps window on BCLKs
• Test clock mode eases system design
• Selectable multiplying ratios
• Custom configurations available
• Output frequency ranges to 100 MHz (depending on
option)
• 3.0V – 3.7V supply range
• PC serial configuration interface
• Power Management Control Input pins
• 56-pin SSOP package
Block Diagram
Pin Configuration
9150-01 RevE 4/25/01
56-Pin SSOP
Functionality
FS0
0
1
C P UC LK ,
SDRAM
(MHz)
60.0
66.6
X1, REF
(MHz)
14.318
14.318
P C IC LK
(MHz)
30
33.3
Pentium is a trademark of Intel Corporation
ICS reserves the right to make changes in the device data identified in this
publication without further notice. ICS advises its customers to obtain the latest
version of all device data to verify that any information being relied upon by the
customer is current and accurate.