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PDF W83194AR-W Data sheet ( Hoja de datos )
| Número de pieza | W83194AR-W | |
| Descripción | 150MHZ CLOCK FOR WHITNEY CHIPSET | |
| Fabricantes | Winbond | |
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W83194AR-W
150MHZ CLOCK FOR WHITNEY CHIPSET
1.0 GENERAL DESCRIPTION
The W83194AR-W is a Clock Synthesizer for Intel Whitney chipset. W83194AR-W provides all
clocks required for high-speed RISC or CISC microprocessor and also provides 64 different
frequencies of CPU, SDRAM, PCI, 3V66, IOAPIC clocks frequency setting. All clocks are externally
selectable with smooth transitions.
The W83194AR-W 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 W83194AR-W 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¡Ó 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 clocks
• 9 SDRAM clocks for 2 DIMMs
• 8 PCI synchronous clocks.
• Optional single or mixed supply:
(VddR = VddP=VddS = Vdd48 = Vdd3 = 3.3V, VddA=VddC=2.5V)
• Skew form CPU to PCI clock -1 to 4 ns, center 2.6 ns
• Smooth frequency switch with selections from 66.8 to 150MHz
• 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 )
• Two 48 MHz pins for USB
• 24 MHz for super I/O
• 48-pin SSOP package
Publication Release Date: May. 1999
- 1 - Revision 0.50
1 page  
W83194AR-W
PRELIMINARY
5.0 FREQUENCY SELECTION BY HARDWARE
FS4 FS3 FS2 FS1 FS0
CPU
(MHz)
0 0 0 0 0 83.3
0 0 0 0 1 90
0 0 0 1 0 75
0 0 0 1 1 150
0 0 1 0 0 138
0 0 1 0 1 95.25
0 0 1 1 0 129
0 0 1 1 1 124
0 1 0 0 0 119
0 1 0 0 1 114
0 1 0 1 0 110
0 1 0 1 1 105
0 1 1 0 0 66.8
0 1 1 0 1 100.2
0 1 1 1 0 133.6
0 1 1 1 1 133.3
1 0 0 0 0 125
1 0 0 0 1 127
1 0 0 1 0 130
1 0 0 1 1 72
1 0 1 0 0 140
1 0 1 0 1 136
1 0 1 1 0 145
1 0 1 1 1 155
1 1 0 0 0 121
1 1 0 0 1 117
1 1 0 1 0 112
1 1 0 1 1 107
1 1 1 0 0 66.8
1 1 1 0 1 100.2
1 1 1 1 0 100.9
1 1 1 1 1 133.6
SDRAM
(MHz)
125
90
113
150
138
95.25
129
124
119
114
110
105
100.2
100.2
100.2
133.3
125
127
130
108
140
136
145
155
121
117
112
107
100.2
100.2
100.9
133.6
3V66(MHz)
83
60
75
75
69
63.5
86
83
80
76
73.3
70
66.8
66.8
66.7
66.7
83.33
84.67
86.67
72
70
68
73
78
81
78
75
71
66.8
66.8
67.3
66.7
PCI (Mhz)
= 3V66/2
41.7
30
37.7
37.5
34.6
31.75
43
41.4
39.8
38
36.7
35
33.4
33.3
33.6
33.3
41.67
42.34
43.33
36.1
35.1
33.9
36.3
38.8
40.5
38.9
37.3
35.7
33.4
33.4
33.6
33.3
IOAPIC (Mhz)
= PCI/2
20.85
15
18.85
18.75
17.3
15.88
21.5
20.7
19.9
19
18.35
17.5
16.7
16.7
16.8
16.7
20.83
21.17
21.67
18.05
17.55
16.95
18.15
19.4
20.25
19.45
18.65
17.85
16.7
16.7
16.8
16.7
Publication Release Date: May. 1999
- 5 - Revision 0.50
5 Page 
7.0 ORDERING INFORMATION
Part Number
W83194AR-W
Package Type
48 PIN SSOP
W83194AR-W
PRELIMINARY
Production Flow
Commercial, 0°C to +70°C
8.0 HOW TO READ THE TOP MARKING
W83194AR-W
28051234
814GBB
1st line: Winbond logo and the type number: W83194AR-W
2nd line: Tracking code 2 8051234
2: wafers manufactured in Winbond FAB 2
8051234: wafer production series lot number
3rd line: Tracking code 814 G B B
814: packages made in '98, week 14
G: assembly house ID; A means ASE, S means SPIL, G means GR
BB: IC revision
All the trade marks of products and companies mentioned in this data sheet belong to their
respective owners.
- 11 -
Publication Release Date: May. 1999
Revision 0.50
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet W83194AR-W.PDF ] | |
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