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PDF W83194R-630A Data sheet ( Hoja de datos )

Número de pieza W83194R-630A
Descripción 166MHZ CLOCK FOR SIS CHIPSET
Fabricantes Winbond 
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W83194R-630A
166MHZ CLOCK FOR SIS CHIPSET
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 I2C 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, PentiumII, AMD and Cyrix CPUs with I2C.
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
I2C 2-Wire serial interface and I2C 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
Publication Release Date: Nov. 1999
- 1 - Revision 0.65

1 page




W83194R-630A pdf
W83194R-630A
5.5 Power Pins
SYMBOL
Vdd
VddLCPU
VddP
VddSD
Vss
PRELIMINARY
PIN FUNCTION
1 Power supply for REF crystal and core logic.
47 Power supply for CPUCLK_F and CPUCLK[0:1], either
2.5V or 3.3V.
6,15 Power supply for PCI outputs.
19,27,30,36,42 Power supply for SDRAM and 48/24NHz outputs.
3,10,16,22,33,39,44 Circuit Ground.
6. FREQUENCY SELECTION BY HARDWARE
FS3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
FS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
FS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU
(MHz)
66.8
100.2
83.3
133.6
75
100.2
100.2
133.6
66.8
97
97
95.2
140
112
96.2
166
SDRAM
(MHz)
100.2
100.2
83.3
100.2
75
133.6
150.3
133.6
66.8
97
129.3
95.2
140
112
96.2
166
PCI (MHz)
33.4
33.4
33.2
33.4
37.5
33.4
33.4
33.4
33.4
32.3
32.3
31.7
35
37.3
32.1
33.3
REF (MHz)
IOAPIC
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
7. SEL3.3_2.5# BUFFER SELECTION
SEL3.3_2.5# ( Pin 25 ) Input Level
1
0
CPU Operate at
VDDLCPU = 2.5V
VDDLCPU = 3.3V
Publication Release Date: Nov. 1999
- 5 - Revision 0.65

5 Page





W83194R-630A arduino
11. PACKAGE DRAWING AND DIMENSIONS
W83194R-630A
PRELIMINARY
Headquarters
No. 4, Creation Rd. III
Science-Based Industrial Park
Hsinchu, Taiwan
TEL: 886-35-770066
FAX: 886-35-789467
www: http://www.winbond.com.tw/
Taipei Office
11F, No. 115, Sec. 3, Min-Sheng East Rd.
Taipei, Taiwan
TEL: 886-2-7190505
FAX: 886-2-7197502
TLX: 16485 WINTPE
Winbond Electronics (H.K.) Ltd.
Rm. 803, World Trade Square, Tower II
123 Hoi Bun Rd., Kwun Tong
Kowloon, Hong Kong
TEL: 852-27516023-7
FAX: 852-27552064
Winbond Electronics
(North America) Corp.
2730 Orchard Parkway
San Jose, CA 95134 U.S.A.
TEL: 1-408-9436666
FAX: 1-408-9436668
Please note that all data and specifications are subject to change without
notice. All the trade marks of products and companies mentioned in this data
sheet belong to their respective owners.
These products are not designed for use in life support appliances, devices,
or systems where malfunction of these products can reasonably be expected
to result in personal injury. Winbond customers using or selling these
products for use in such applications do so at their own risk and agree to fully
indemnify Winbond for any damages resulting from such improper use or sale.
- 11 -
Publication Release Date: Nov. 1999
Revision 0.65

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