W83193R-02 데이터 시트보기 (PDF) - Winbond

부품명

상세내역

일치하는 목록

W83193R-02

83.3 MHZ 3-DIMM CLOCK

Winbond 

Preliminary W83193R-02/-04/-04A

83.3 MHZ 3-DIMM CLOCK

1.0 GENERAL DESCRIPTION

The W83193R-02/-04/-04A is a Main board Clock Synthesizer which provides all clocks required for

high-speed RISC or CISC microprocessor such as Intel PentiumPro, PentiumII, AMD or Cyrix. Eight

different frequency of CPU and PCI clocks are externally selectable with smooth transitions.

The W83193R-02/-04/-04A also provides I2C serial bus interface to program the registers to enable

or disable each clock outputs and choose the 0.5% or 1.5% center type spread spectrum.

The W83193R-02/-04/-04A accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V

supply. High drive PCI and SDRAM CLOCK outputs typically provide greater than 1V /nS slew rate

into 30 pF loads. CPU CLOCK outputs typically provide better than 1V /nS slew rate into 20 pF loads

as maintaining 50 ±5% duty cycle. The fixed frequency outputs as REF, 24 MHz, and 48 MHz provide

better than 0.5V /nS slew rate.

2.0 FEATURES

• Supports Pentium™, Pentium™ Pro, Pentium™ II, AMD and Cyrix CPUs with I2C.

• 4 CPU clocks

• 12 SDRAM clocks for 3 DIMs.

• 7 PCI synchronous clocks.

• One IOAPIC clock for multiprocessor support.

• Optional single or mixed supply:

(VDD = VDDq3 = VDDq2 = VDDq2b = 3.3V) or (VDD = VDDq3 = 3.3V, VDDq2 = VDD2b = 2.5V)

• < 250 pS skew among CPU and SDRAM clocks.

• < 250 pS skew among PCI clocks.

• Smooth frequency switch with selections from 50 MHz to 83.3 MHz CPU. (W83193R-04)

• Smooth frequency switch with selections from 50 MHz to 112 MHz CPU. (W83193R-04A)

• I2C 2-Wire serial interface and I2C read back.

• Spread spectrum function to reduce EMI.

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

(mode as Tri-state or Normal)

• MODE pin for power Management

• 48 MHz for USB

• 24 MHz for super I/O

• Packaged in 48-pin SSOP

Publication Release Date: April 1999

-1-

Revision A1

Share Link: