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參數(shù)資料
| 型號(hào)： | W83194R-630A |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | XO, clock |
| 英文描述： | 166MHZ CLOCK FOR SIS CHIPSET |
| 中文描述： | 166 MHz, PROC SPECIFIC CLOCK GENERATOR, PDSO48 |
| 封裝： | SSOP-48 |
| 文件頁(yè)數(shù)： | 1/11頁(yè) |
| 文件大小： | 159K |
| 代理商： | W83194R-630A |
W83194R-630A
166MHZ CLOCK FOR SIS CHIPSET
Publication Release Date: Nov. 1999
- 1 - Revision 0.65
1. GENERAL DESCRIPTION
The W83194R-630A is a Clock Synthesizer for SiS 540/630 chipset. W83194R-630A provides all
clocks required for high-speed RISC or CISC microprocessor such as AMD,Cyrix,Intel Pentium,
Pentium II and also provides 16 different frequencies of CPU clocks frequency setting. All clocks are
externally selectable with smooth transitions. The W83194R-630A makes SDRAM in synchronous or
asynchronous frequency with CPU clocks.
The W83194R-630A provides I
2
C serial bus interface to program the registers to enable or disable
each clock outputs and W83194R-630A provides the 0.5%, 0.75% center type and 0~0.5% down type
spread spectrum to reduce EMI.
The W83194R-630A 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 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. PRODUCT FEATURES
Supports Pentium
, Pentium
II, AMD and Cyrix CPUs with I
2
C.
3 CPU clocks
14 SDRAM clocks for 3 DIMMs
7 PCI synchronous clocks.
Optional single or mixed supply:
(All Vdd = 3.3V) or (Other s Vdd = 3.3V, VddLCPU=2.5V)
Skew form CPU to PCI clock 1 to 4 ns, center 2.6 ns
SDRAM frequency synchronous or asynchronous to CPU clocks
Smooth frequency switch with selections from 66 to 166mhz
I
2
C 2-Wire serial interface and I
2
C read back
0.5%, 0.75%center type, 0~0.5% down type spread spectrum to reduce EMI
Programmable registers to enable/stop each output and select modes
(mode as Tri-state or Normal )
48 MHz for USB
24 MHz for super I/O
Packaged in 48-pin SSOP
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| W83194R-67A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:100MHZ 3-DIMM CLOCK FOR VIA MVP4 |
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| W83194R-81 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:100MHZ CLOCK FOR SIS CHIPSET |
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