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ICS9179M-12 Datasheet

  • ICS9179M-12

  • 3 DIMM Buffer

  • 9頁

  • ICS

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Integrated
Circuit
Systems, Inc.
ICS9179-12
3 DIMM Buffer
General Description
The
ICS9179-12
is a buffer intended for reduced pin count
2 - chip Intel BX chipset designs
An I
2
C interface is included, enabling individual outputs to be
turned on or off. With 13 outputs, up to 3 DIMMs are supported.
Features
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Thirteen high speed, low noise buffers, supports up to
three SDRAM DIMMs.
Buffer outputs skew matched to within 250 ps.
I
2
C Serial Configuration interface to allow individual
OUTPUTs to be stopped low.
Multiple VDD, VSS pins for noise reduction
3.3V鹵5% supply voltage
28-pin SOIC and SSOP package
Propagation delay between 1 to 5.5ns
Operation to 133MHz at 3.3V鹵5%
Block Diagram
Pin Configuration
28-Pin SOIC and SSOP
* Internal pull-up resistor of 100K
Ohms to 3.3V on indicated inputs
Power Groups
VDD (0:4), GND (0:4) = Power supply for OUTPUT buffer
VDDI, GNDI = Power supply for I
2
C circuitry
PentiumPro is a trademark of Intel Corporation
I
2
C is a trademark of Philips Corporation
9179-12 Rev C 7/16/99
PRODUCT PREVIEW documents contain information on new
products in the sampling or preproduction phase of development.
Characteristic data and other specifications are subject to change
without notice.

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