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W83194R-67A, W83194R-67B, W83194R-73

Table of contents:
Info of W83194R-67A
Info of W83194R-67B
Info of W83194R-73

W83194R-67A, W83194R-67B, W83194R-73 Selling Leads, Datasheet

MFG:WINBOND Package Cooled:SSOP D/C:99+

W83194R-67A, W83194R-67B, W83194R-73 Picture

W83194R-67A, W83194R-67B, W83194R-73 Datasheet download

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Part Number: W83194R-67A

MFG: WINBOND

Package Cooled: SSOP

D/C: 99+

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W83194R-67A General Description

The W83194R-67A is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel Pentium , AMD and Cyrix. W83194R-67A provides sixteen CPU/PCI frequencies which are externally selectable with smooth transitions. W83194R-67AA also provides 13 SDRAM clocks controlled by the none-delay buffer_in pin.

The W83194R-67A accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. Spread spectrum built in at ¡Ó0.5% or ¡Ó0.25% to reduce EMI. Programmable stopping individual clock outputs and frequency selection through I2C interface. The device meets the Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up.

High drive six PCI and thirteen SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. Two 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-67A Maximum Ratings

Symbol	PARAMETER	RATING
V_dd , V_IN	Voltage on any pin with respect to GND	-0.5V to +7.0V
T_STG	Storage Temperature	-65° C to +150° C
T_B	Ambient Temperature	-55° C to +125° C
T_A	Operating Temperature	0°C to + 70°C

W83194R-67A Features

· Supports Pentium™ , AMD, Cyrix CPU with I²C.
· 4 CPU clocks (one free-running CPU clock)
· 13 SDRAM clocks for 3 DIMs
· 6 PCI synchronous clocks
· Optional single or mixed supply:
(Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.3V) or (Vddq1= Vddq2 = Vddq3=Vddq4 = 3.3V, VddL1 = VdqL2 = 2.5V)
· < 250ps skew among CPU and SDRAM clocks
· < 4ns propagation delay SDRAM from buffer input
· Skew from CPU(earlier) to PCI clock -1 to 4ns, center 2.6ns.
· Smooth frequency switch with selections from 60 MHz to 124 MHz CPU
· I²C 2-Wire serial interface and I²C read back
· ¡Ó0.25% or ¡Ó0.5% spread spectrum function to reduce EMI
· Programmable registers to enable/stop each output and select modes (mode as Tri-state or Normal )
· 2ms power up clock stable time
· MODE pin for power Management
· One 48 MHz for USB & one 24 MHz for super I/O
· 48-pin SSOP package

W83194R-67A Connection Diagram

W83194R-67B General Description

The W83194R-67B is a Clock Synthesizer which provides all clocks required for high-speed RISC or CISC microprocessor such as Intel Pentium , AMD and Cyrix. W83194R-67B provides sixteen CPU/PCI frequencies which are externally selectable with smooth transitions. W83194R-67B also provides 13 SDRAM clocks controlled by the none-delay buffer_in pin.

The W83194R-67B accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. Spread spectrum built in at ±0.5% or ±0.25% to reduce EMI. Programmable stopping individual clock outputs and frequency selection through I2C interface. The device meets the Pentium power-up stabilization, which requires CPU and PCI clocks be stable within 2 ms after power-up.

High drive six PCI and thirteen SDRAM CLOCK outputs typically provide greater than 1 V /ns slew rate into 30 pF loads. Two 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.

W83194R-67B Maximum Ratings

Symbol	PARAMETER	RATING
V_dd , V_IN	Voltage on any pin with respect to GND	-0.5V to +7.0V
T_STG	Storage Temperature	-65° C to +150° C
T_B	Ambient Temperature	-55° C to +125° C
T_A	Operating Temperature	0°C to + 70°C

W83194R-67B Features

· Supports Pentium™ , AMD, Cyrix CPU with ^_I2C.
· 4 CPU clocks (one free-running CPU clock)
· 13 SDRAM clocks for 3 DIMs
· 6 PCI synchronous clocks
· Optional single or mixed supply:
(Vddq1=Vddq2 = Vddq3 = Vddq4 = VddL1 =VddL2= 3.3V) or (Vddq1= Vddq2 = Vddq3=Vddq4 = 3.3V, VddL1 = VdqL2 = 2.5V)
· < 250ps skew among CPU and SDRAM clocks
· < 4ns propagation delay SDRAM from buffer input
· Skew from CPU(earlier) to PCI clock -1 to 4ns, center 2.6ns.
· Smooth frequency switch with selections from 60 MHz to 124 MHz CPU
· I²C 2-Wire serial interface and I²C read back
· 0~0.5% down type or ±0.25% or ±0.5% spread spectrum function to reduce EMI
· Programmable registers to enable/stop each output and select modes (mode as Tri-state or Normal )
· 2ms power up clock stable time
· MODE pin for power Management
· One 48 MHz for USB & one 24 MHz for super I/O
· Packaged in 48-pin SSOP

W83194R-67B Connection Diagram

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