W83194R-KX中文資料華邦電子數(shù)據(jù)手冊PDF規(guī)格書

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