ICS9177 Datasheet, PDF (1/8 Pages) Integrated Circuit Systems – High Frequency System Clock Generator

Integrated
Circuit
Systems, Inc.
ICS9177
High Frequency System Clock Generator
General Description
The ICS9177 is a multiple output clock generator ideal for
high speed processor system applications. A single high-
speed internal VCO is utilized to derive up to four simultaneous
clock output frequencies. This enables output clock skew
matching and the minimization of clock jitter. The internal
VCO operates up to 350 MHz providing edge skew matched
output clocks.
One differential PECL (Positive ECL) output pair provides a
high speed processor clock. 12 TTL clock outputs are also
provided for other system functions, such as bus clocks. Input
selection pins are used to select the TTL output clock
frequencies.
Features
• Provides output frequencies up to 175 Mhz
• Internal VCO is divided into four skew-matched output
frequencies (Out A, B, C, D)
• External clock feedback provides input to output skew
matching
• Differential PECL clock output pair provided for high
speed output (Out A)
• 12 TTL clock outputs (for Out B, C, D)
• Single 5 volt power supply voltage
• Internal loop filters
• 52-pin QFP package
For information about ICS9177 customization optics, please
contact ICS.
Block Diagram
Pin Configuration
ICS9177RevB060297P
52-Pin QFP
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.