W83194BR-C データシートの表示（PDF） - Winbond

部品番号

コンポーネント説明

一致するリスト

W83194BR-C

200MHZ CLOCK FOR CAMINO CHIPSET

Winbond 

W83194BR-C

200MHZ CLOCK FOR CAMINO CHIPSET

1.0 GENERAL DESCRIPTION

The W83194BR-C is a Clock Synthesizer for Intel Camino 820 chipset. W83194BR-C provides all

clocks required for high-speed RISC or CISC microprocessor and also provides 64 different

frequencies of CPU, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally selectable

with smooth transitions.

The W83194BR-C provides I2C serial bus interface to program the registers to enable or disable each

clock outputs and provides 0.5% and 0.75% center type spread spectrum to reduce EMI.

The W83194BR-C accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply.

High drive PCI CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. CPU

CLOCK outputs typically provide better than 1 V /ns slew rate into 20 pF loads as maintaining 50± 5%

duty cycle. The fixed frequency outputs as REF, 24MHz, and 48 MHz provide better than 0.5V /ns

slew rate.

2.0 PRODUCT FEATURES

• 2 CPU clock outputs

• One CPU/2 output as reference input to DRCG

• 3 3V66 clock outputs

• 3 IOAPIC clock outputs

• 8 PCI synchronous clocks.

• Optional single or mixed supply:

(VddQ2 = VddQ3 = 3.3V or VddQ3=3.3V, VddQ2=2.5V)

• CPU to 3V66 offset .0 to 1.5 ns

• 3V66 to PCI offset 1.5 to 4.0 ns

• Skew form CPU to PCI clock 1 to 4 ns, center 2.6 ns

• Smooth frequency switch with selections from 66.8 to 200MHz

• I2C 2-Wire serial interface and I2C read back

• 0.5% and 0.75% center type spread spectrum

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

(mode as Tri-state or Normal )

• 48 MHz pins for USB

• 24 MHz for super I/O

• 48-pin SSOP package

Publication Release Date: Dec. 1999

-1-

Revision 0.40

Share Link: