W83194R-81, W83195, W83195AR-08 Selling Leads, Datasheet
MFG:WINBOND Package Cooled:SSOP48 D/C:SSOP-48
W83194R-81, W83195, W83195AR-08 Datasheet download
Part Number: W83194R-81
MFG: WINBOND
Package Cooled: SSOP48
D/C: SSOP-48
W83194R-81, W83195, W83195AR-08
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Info of W83194R-81
Info of W83195
Info of W83195AR-08
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About W83194R-81
PDF/DataSheet Download
Datasheet: W83194R-81
File Size: 237185 KB
Manufacturer: WINBOND [Winbond]
Download : Click here to Download
About W83195AR-25
PDF/DataSheet Download
Datasheet: W83195AR-25
File Size: 251822 KB
Manufacturer: WINBOND [Winbond]
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About W83176G-732
PDF/DataSheet Download
Datasheet: W83176G-732
File Size: 411857 KB
Manufacturer: WINBOND [Winbond]
Download : Click here to Download
W83194R-81 General Description
The W83194R-81 is a Clock Synthesizer for SiS chipset. W83194R-81 provides all clocks required for high-speed RISC or CISC microprocessor such as AMD,Cyrix,Intel Pentium and also provides 16 different frequencies of CPU clocks frequency setting. All clocks are externally selectable with smooth transitions. The W83194R-81 makes SDRAM in synchronous or asynchronous frequency with CPU clocks.
The W83194R-81 provides I2C serial bus interface to program the registers to enable or disable each clock outputs and W83194R-81 provides the 0.25%, 0.5% center type spread spectrum to reduce EMI.
The W83194R-81 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.
W83194R-81 Maximum Ratings
|
Symbol |
PARAMETER |
RATING |
|
Vdd , VIN |
Voltage on any pin with respect to GND |
-0.5V to +7.0V |
|
TSTG |
Storage Temperature |
-65° C to +150° C |
|
TB |
Ambient Temperature |
-55° C to +125° C |
|
TA |
Operating Temperature |
0°C to + 70°C |
W83194R-81 Features
· Supports Pentium™, Pentium™ Pro, AMD and Cyrix CPUs with I2C.
· 3 CPU clocks
· 13 SDRAM clocks for 3 DIMMs
· 6 PCI synchronous clocks.
· Optional single or mixed supply:
(Vdd = Vddq4=Vddq3 = Vddq2b = 3.3V, Vddq2=2.5V) or
(Vdd = Vddq4=Vddq3 = 3.3V, Vddq2=Vdq2b = 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 133mhz(including 90MHz)
· I2C 2-Wire serial interface and I2C read back
· 0.25%, 0.5% center type spread spectrum 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
· 48-pin SSOP package
· 3 CPU clocks
· 13 SDRAM clocks for 3 DIMMs
· 6 PCI synchronous clocks.
· Optional single or mixed supply:
(Vdd = Vddq4=Vddq3 = Vddq2b = 3.3V, Vddq2=2.5V) or
(Vdd = Vddq4=Vddq3 = 3.3V, Vddq2=Vdq2b = 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 133mhz(including 90MHz)
· I2C 2-Wire serial interface and I2C read back
· 0.25%, 0.5% center type spread spectrum 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
· 48-pin SSOP package
W83194R-81 Connection Diagram
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