W83L177R

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 zerodelay (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 I²C serial bus interface to program the registers to enable or disable each SDRAM clock outputs.