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PDF W83194AR-WE Data sheet ( Hoja de datos )
| Número de pieza | W83194AR-WE | |
| Descripción | 200MHZ CLOCK FOR WHITNEY CHIPSET | |
| Fabricantes | Winbond | |
| Logotipo |  |
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W83194AR-We
200MHZ CLOCK FOR WHITNEY CHIPSET
1.0 GENERAL DESCRIPTION
The W83194AR-We is a Clock Synthesizer for Intel Whitney chipset. W83194AR-We 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-We 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-We 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.
2.0 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 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 )
• Two 48 MHz pins for USB
• 24 MHz for super I/O
• 48-pin SSOP package
Publication Release Date: Nov. 1999
- 1 - Revision 0.50
1 page  
W83194AR-We
PRELIMINARY
5.0 FREQUENCY SELECTION BY HARDWARE
FS4 FS3 FS2 FS1 FS0 CPU
SDRAM
CPU 3V66 (MHz) PCI(MHz) IOAPIC (MHz) IOAPIC (MHz)
(MHz)
(MHz) /SDRAM
APIC_SEL=1 APIC_SEL=0
0 0 0 0 0 83.3 124.95 2/3 83.30 41.65 20.83
0 0 0 0 1 90
90
1
60.00 30.00
15.00
0 0 0 1 0 75 112.5 2/3 75.00 37.50 18.75
0 0 0 1 1 72
108
2/3 72.00 36.00
18.00
0 0 1 0 0 89.07 133.6 2/3 89.07 44.53 22.27
0 0 1 0 1 95.25 95.25
1
63.50 31.75
15.88
0 0 1 1 0 121 121
1
80.67 40.33
20.17
0 0 1 1 1 124 124
1
82.67 41.33
20.67
0 1 0 0 0 119 119
1
79.33 39.67
19.83
0 1 0 0 1 114 114
1
76.00 38.00
19.00
0 1 0 1 0 110 110
1
73.33 36.67
18.33
0 1 0 1 1 105 105
1
70.00 35.00
17.50
0 1 1 0 0 66.8 100.2 2/3 66.80 33.40 16.70
0 1 1 0 1 100.2 100.2
1
66.80 33.40
16.70
0 1 1 1 0 133.6 133.6
1
66.80 33.40
16.70
0 1 1 1 1 133.6 100.2 4/3 66.80 33.40 16.70
1 0 0 0 0 135 101.25 4/3 67.50 33.75 16.88
1 0 0 0 1 125 125
1
83.33 41.67
20.83
1 0 0 1 0 127 127
1
84.67 42.33
21.17
1 0 0 1 1 130 130
1
86.67 43.33
21.67
1 0 1 0 0 140 140
1
70.00 35.00
17.50
1 0 1 0 1 136 136
1
68.00 34.00
17.00
1 0 1 1 0 166 166.00 1
83.00 41.50
20.75
1 0 1 1 1 155 155
1
77.50 38.75
19.38
1 1 0 0 0 150 112.5 4/3 75.00 37.50 18.75
1 1 0 0 1 117 117
1
78.00 39.00
19.50
1 1 0 1 0 107 107
1
71.33 35.67
17.83
1 1 0 1 1 100.9 100.9
1
67.27 33.63
16.82
1 1 1 0 0 145 108.75 4/3 72.50 36.25 18.13
11 1
0 1 140
105
4/3 70.00 35.00
17.50
1 1 1 1 0 138 103.5 4/3 69.00 34.50 17.25
1 1 1 1 1 137 102.75 4/3 68.50 34.25 17.13
41.65
30.00
37.50
36.00
44.53
31.75
40.33
41.33
39.67
38.00
36.67
35.00
33.40
33.40
33.40
33.40
33.75
41.67
42.33
43.33
35.00
34.00
41.50
38.75
37.50
39.00
35.67
33.63
36.25
35.00
34.50
34.25
Publication Release Date: Nov. 1999
- 5 - Revision 0.50
5 Page 
W83194AR-We
7.0 SPECIFICATIONS
PRELIMINARY
7.1 Absolute Maximum Ratings
Stresses greater than those listed in this table may cause permanent damage to the device.
Precautions should be taken to avoid application of any voltage higher than the maximum rated
voltages to this circuit. Maximum conditions for extended periods may affect reliability. Unused
inputs must always be tied to an appropriate logic voltage level (Ground or Vdd).
Symbol
Vdd , VIN
TSTG
TB
TA
Parameter
Voltage on any pin with respect to GND
Storage Temperature
Ambient Temperature
Operating Temperature
Rating
- 0.5 V to + 7.0 V
- 65°C to + 150°C
- 55°C to + 125°C
0°C to + 70°C
7.2 Electronical Characteristics---Input/Output
Vddq1=Vddq2 = Vddq3 = Vddq4 =3.3V, VddL1 =VddL2= 2.5V , TA = 0°C to +70°C
Parameter
Symbol Min Typ Max Units
Test Conditions
Input Low Voltage
VIL Vss-0.3
0.8 Vdc
Input High Voltage VIH 2.0
Vdd+0.3 Vdc
Input Low Current IIL -5
µA No pull-up resistors
Input Low Current
IIL -200
µA Pull-up resistros
Input High Current IIH -5
5 µA
Input Capacitance
Operating Supply
Current
CIN
COUT
CINX
Idd3
27
5 pF Logic inputs
6 pF Output capacitance
45 pF Xin and Xout
100 MA CPU = 66.6 MHz
PCI = 33.3 Mhz with load
Power Down Supply
Current
Idd2
600 µA
Settling Time
Delay
Ts
tPZH,tPZH
tPLZ,tPZH
1
1
3 mS From first crossing to 1% target
freq.
10 nS Output enable delay
10 nS Output enable delay
- 11 -
Publication Release Date: Nov. 1999
Revision 0.50
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet W83194AR-WE.PDF ] | |
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