W83194R-KX中文资料华邦电子数据手册PDF规格书

GENERAL DESCRIPTION

The W83194R-KX is a clock generator which provides all clocks required for AMD K7 system. W83194R-KX provides one differential pair CPU clock open drain outputs up to 143MHz which are externally selectable with smooth transitions. W83194R-KX also provides 6 PCI clocks and 13 SDRAM clocks controlled by the none-delay buffer_in pin.

PRODUCT FEATURES

• Supports AMD K7 CPU with I2C.

• One pair of differential CPU clocks

• One chipset clock

• 13 SDRAM clocks for 3 DIMMs

• 6 PCI synchronous clocks

• Optional single or mixed supply:

(Vddq3=Vddq2 =3.3V) or (Vddq3 = 3.3V, Vddq2 = 2.5V)

• < 250ps skew among CPU clocks

• < 250ps skew among PCI clocks

• < 5ns propagation delay SDRAM from buffer input

• Skew from CPU(earlier) to PCI clock 1.5 to 4ns, center 2.6ns.

• Smooth frequency switch with selections from 66.8 MHz to 143 MHz CPU

• I2C 2-Wire serial interface and I2C read back

• ± 0.25 or ± 0.5 spread spectrum function to reduce EMI

• Programmable registers to enable/stop each output and select modes

(mode as Tri-state or Normal )

• One 48 MHz for USB & one 24 MHz for super I/O

• 48-pin SSOP package