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ICS9179YG-03-T Datasheet

  • ICS9179YG-03-T

  • Low Skew Fan Out Buffers

  • 298.54KB

  • 10頁

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS9179-03
Low Skew Fan Out Buffers
General Description
The
ICS9179-03
generates low skew clock buffers required
for high speed RISC or CISC microprocessor systems such as
Intel PentiumPro. Outputs will handle up to 133MHz clocks.
An output enable is provided for testability.
The device is a buffer with low output to output skew. This is
a Fanout buffer device, not using an internal PLL. This buffer
can also be a feedback to an external PLL stage for phase
synchronization to a master clock. There are a total of ten
outputs, sufficient for feedback to a PLL source and to drive
four small outline DIMM modules (S.O. DIMM) at 2 clocks
each. Or a total of ten outputs as a Fanout buffer from a
common clock source.
The individual clock outputs are addressable through I
2
C to
be enabled, or stopped in a low state for reduced EMI when
the lines are not needed.
Features
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Ten High speed, low noise non-inverting buffers for (to
133MHz), clock buffer applications.
Output slew rate faster than 1.5V/ns into 20pF
Supports up to four small outline DIMMS (S.O. DIMM).
Synchronous clocks skew matched to 250 ps window on
OUTPUTs (0:9).
I
2
C Serial Configuration interface to allow individual
OUTPUTs to be stopped low.
Multiple VDD, VSS pins for noise reduction
Tri-state pin for testing
3.0V 聳 3.7V supply range
28-pin (209 mil) SSOP and (6.1mm) TSSOP package
Block Diagram
Pin Configuration
28-Pin SSOP & TSSOP
PentiumPro is a trademark of Intel Corporation
I
2
C is a trademark of Philips Corporation
9179-03 Rev H 10/16/00
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.

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