PSICS9169-01 Datasheet, PDF (1/10 Pages) Integrated Circuit Systems – Frequency Generator and Integrated Buffers for Intel Pentium and Pentium ProTM mPs

Integrated
Circuit
Systems, Inc.
ICS9169-01
Frequency Generator and Integrated Buffers for Intel Pentium
and Pentium Pro^TM µP's
General Description
Features
The ICS9169-01 generates all clocks required for high speed _{• Generates four processor, six bus, three 14.318 MHz}
RISC or CISC microprocessor systems such as 486, Pentium/
and one 48 MHz clock for ISA bus, audio, super I/O
Pentium Pro™, PowerPC™, etc. Four different reference
and bus bridge devices
frequency multiplying factors are externally selectable with _{• Supports the Intel MARS chip set}
smooth frequency transitions. These multiplying factors can _{• Synchronous clocks skew matched to 250ps window on}
be customized for specific applications. A test mode is provided
PCLKs and 500ps window on BCLKs
to drive all clocks directly.
• Test clock mode eases system design
• Selectable multiplying ratios
High drive BCLK outputs typically provide greater than 1V/ ^{• Custom configurations available}
ns slew rate into 30pF loads. PCLK outputs typically provide ^{• Output frequency ranges to 100 MHz (depending on}
better than 1V/ns slew rate into 20pF loads while maintaining
option)
50±5% duty cycle. The REF clock outputs typically provide ^{• 3.0V - 5.5 V supply range}
better than 0.5V/ns slew rates.
• 28-pin SOIC and 28-pin SSOP (209-mil) packages
Applications
• Ideal for high-speed RISC or CISC systems such as 486,
Pentium, Pentium Pro, PowerPC, etc.
Block Diagram
PLL
CLOCK
GEN
48 MHz
X2
X1
XTAL OSC
REF(0:2)
OEN
FS0
PLL
SYNC
PCLK(0:3)
CLOCK
FS1
GEN
REG
BCLK(0:5)
9169-01RevE 08/28/98
Pentium is a trademark of Intel Corporation
PowerPC is a trademark of Motorola 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.