ProTM mPs. PSICS9169-01 Datasheet
Frequency Generator and Integrated Buffers for Intel Pentium
and Pentium ProTM µP's
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.Atest 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
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
• Ideal for high-speed RISC or CISC systems such as 486,
Pentium, Pentium Pro, PowerPC, etc.
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
28 Pin SOIC
28 Pin SSOP
0 0 230/33x X1
0 1 212/23x X1
1 0 176/21x X1
1 1 Test mode
*VCO range is limited from 60 - 200 MHz
4, 11, 23
1, 8, 26
6, 7, 9, 10
15, 16, 18
19, 21, 22
28, 27, 25
XTAL or external reference frequency input. This input includes XTAL load
capacitance and feedback bias for a 12.16 MHz crystal, nominally 14.31818
XTAL output which includes XTAL load capacitance.
Ground for logic, PCLK and fixed frequency output buffers.
Ground for BCLK output buffers.
PWR Power for logic, PCLK and fixed frequency output buffers.
Power for BCLK output buffers.
Processor clock outputs which are a multiple of the input reference frequency
as shown in the table above.
Frequency multiplier select pins. See table above. These inputs have internal
Bus clock outputs are fixed at 1/2 the PCLK frequency.
OEN tristates all outputs when low. This input has an internal pull-up device.
Fixed 48 MHz clock (with 14.318 MHz input).
REF is a buffered copy of the crystal oscillator or reference input clock,
nominally 14.31818 MHz.
Note 1: BCLK buffers cannot be supplied with 5 volts (pins 14 and 20) if CPU and fixed frequencies (pins 1, 8, and 26) are being
supplied with 3.3 volts