ICS9158-03

Features:

·8 skew-free, high drive CPU/BUS clocks
·Up to 100 MHz output
·±250ps skew between all outputs
·Outputs can drive up to 30pF load and 40mA
·50±10% duty cycle
·Compatible with 486 and Pentium CPUs
·On-chip loop filter components
·4.5V - 5.5V supply range
·24-pin SOIC package


Application

· Ideal for RISC or CISC systems such as 486, Pentium, PowerPC^TM, etc. requiring multiple CPU and BUS clocks.


Pinout




Specifications

AVDD, VDD referenced to GND . . . . . . . . . . . . . . . .. . . . . . . . . . . .7V
Operating temperature under bias. . . . . . . . . . . . .  0°C to +70°C
Storage temperature . . . . . . . . . . . . . . . . . . . . . -40°C to +150°C
Voltage on I/O pins referenced to GND. . .  GND -0.5V to VDD +0.5V
Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  0.5 Watts
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. This is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect product reliability.

Description

The ICS9158-03 is a low-cost frequency generator designed specifically for desktop and notebook PC applications. Eight copies of the CPU clock are available.

Each high drive (40mA) output is capable for driving a 30pF load and has a typical duty cycle of 50/50. The clock outputs are skew-controlled to within ±250ps.

The ICS9158-03 makes a gradual transition between frequencies, so that it meets the Intel cycle-to-cycle timing specification for 486 and Pentiumô systems.