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W83L177R Datasheet

  • W83L177R

  • 100MHZ 2-DIMM SDRAM BUFFER FOR NOTEBOOK

  • 108.42KB

  • 9頁

  • WINBOND

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W83L177R
100MHZ 2-DIMM SDRAM BUFFER FOR NOTEBOOK
1.0 GENERAL DESCRIPTION
The W83L177R is a 10 outputs SDRAM clock buffer for 2-DIMMs models incorporate with
W83L197R-16 which is the clock synthesizer especially for the 100MHz models such as Intel BX
chipsets.(Refer the datasheet fo Winbond W83L197R-16)
The W83L177R receives the clock from chipset by the Buffer_In pin and provides almost zero-
delay (less than 4ns propagation delay) SDRAM buffer outputs for the 10 SDRAM clocks which are
synchronous with the CPU clock outputs priovided by W83L197R-16. The clock skew between any
two clock outputs is less than 250ps and the output buffer impedance is about 15 ohms.
The W83L177R also provides I
2
C serial bus interface to program the registers to enable or disable
each SDRAM clock outputs.
2.0 PRODUCT FEATURES
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10 SDRAM clocks for 2-DIMMs
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Clock skew less than 250ps
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Almost none delay Buffer-in controlling SDRAM clocks(< 4ns propagation delay)
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I2C 2-wire serial interface
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Programmable registers to enable/stop each output
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Incorporate with W83L197R-16
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28pin-SOP package (209mil)
-1-
Publication Release Date: Mar. 1999
Revision 0.10

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