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PDF W83193R-04 Data sheet ( Hoja de datos )
| Número de pieza | W83193R-04 | |
| Descripción | 83.3 MHZ 3-DIMM CLOCK | |
| Fabricantes | Winbond | |
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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
1 page  
Preliminary W83193R-02/-04/-04A
6.0 FREQUENCY SELECTION
W83193R-02/-04 Frequency Table
FS2 FS1 FS0 CPU, SDRAM (MHz)
000
50
001
75
010
83.3
011
68.5
100
83.3
101
75
110
60
111
66.8
PCI (MHz)
25
32
41.65
34.25
33.3
37.5
30
33.4
REF, IOAPIC (MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
W83193R-04A Frequency Table
FS2 FS1 FS0 CPU, SDRAM (MHz)
000
50
001
100
010
011
83.3
68.5
100
90
101
75
110
112
111
66.8
PCI (MHz)
25
50
41.65
34.25
45
37.5
56
33.4
REF, IOAPIC (MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
7.0 CPU 3.3#_2.5 BUFFER SELECTION
CPU 3.3#_2.5 (PIN 2) INPUT LEVEL
1
0
CPU & IOAPIC OPERATE AT
VDD = 2.5V
VDD = 3.3V
8.0 FUNCTIONAL DESCRIPTION
8.1 Power Management Functions
All clocks can be individually enabled or disabled via the 2-wire control interface. On power up,
external circuitry should allow 3 ms for the VCO to stabilize prior to enabling clock outputs to assure
correct pulse widths. When MODE = 0, pins 15 and 46 are inputs (PCI_STOP#), (CPU_STOP#),
when MODE = 1, these functions are not available. A particular clock could be enabled as both the 2-
wire serial control interface and one of these pins indicate that it should be enable.
Publication Release Date: April 1999
- 5 - Revision A1
5 Page 
Preliminary W83193R-02/-04/-04A
9.3 DC Characteristics
VDD = VDDq3 = 3.3V ±5%, VDDq2 = VDDq2b = 2.375V~2.9V , TA = 0° C to +70° C
PARAMETER
SYM. MIN. TYP. MAX. UNITS TEST CONDITIONS
Input Low Voltage
VIL
0.8 Vdc
Input High Voltage
VIH 2.0
Vdc
Input Low Current
IIL
-66 µA
Input High Current
IIH
5 µA
Output Low Voltage
IOL = 4 mA
VOL
0.4 Vdc All outputs
Output High Voltage
IOH = 4 mA
VOH
2.4
Vdc All outputs using 3.3V
power
Tri-State Leakage
Current
IOZ
10 µA
Dynamic Supply Current
for VDD + VDDq3
IDD3
mA CPU = 66.6 MHz
PCI = 33.3 MHz with load
Dynamic Supply Current
for VDDq2 + VDDq2b
IDD2
mA Same as above
CPU Stop Current for
VDD + VDDq3
ICPUS3
mA Same as above
CPU Stop Current for
VDDq2 + VDDq2b
ICPUS2
mA Same as above
PCI Stop Current for VDD
+ VDDq3
IPD3
mA
9.4 Buffer Characteristics
9.4.1 Type 1 Buffer for CPU (0:3)
PARAMETER
Pull-up Current Min.
Pull-up Current Max.
Pull-down Current Min.
Pull-down Current Max.
Rise/Fall Time Min.
Between 0.4V and 2.0V
Rise/Fall Time Max.
Between 0.4V and 2.0V
SYMBOL
IOH (min.)
IOH (max.)
IOL (min.)
IOL (max.)
TRF (min.)
TRF (max.)
MIN.
-27
TBD
0.4
TYP.
MAX.
-27
27
1.6
UNITS
mA
mA
mA
mA
nS
TEST CONDITIONS
Vout = 1.0V
Vout = 2.0V
Vout = 1.2V
Vout = 0.3V
10 pF Load
nS 20 pF Load
- 11 -
Publication Release Date: April 1999
Revision A1
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet W83193R-04.PDF ] | |
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