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W83194BR-648, W83194BR-655, W83194BR-97

Table of contents:
Info of W83194BR-648
Info of W83194BR-655
Info of W83194BR-97

W83194BR-648, W83194BR-655, W83194BR-97 Selling Leads, Datasheet

MFG:Winbond Package Cooled:Winbond D/C:05+

W83194BR-648, W83194BR-655, W83194BR-97 Picture

W83194BR-648, W83194BR-655, W83194BR-97 Datasheet download

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Part Number: W83194BR-648

MFG: Winbond

Package Cooled: Winbond

D/C: 05+

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W83194BR-648 General Description

The W83194BR-648 is a Clock Synthesizer for SIS P4 series chipset. W83194BR-648 provides all clocks required for high-speed Intel Pentium 4, and also provides 32 different frequencies of CPU clocks frequency setting. All clocks are externally selectable with smooth transitions. The W83194BR- 648 makes SDRAM in synchronous or asynchronous frequency with CPU clocks.

The W83194BR-648 provides step-less frequency programming by controlling the VCO freq. and the programmable AGP, PCI clock output divisor ratio. AGP and PCI frequency can be fixed to be four kinds of different frequency outputs. A watchdog timer is quipped and when time out, register9 bit5 will be set to 1 for warning. 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 W83194BR-648 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. High drive PCI CLOCK outputs typically provide greater than 1V /nS slew rate into 30 pF loads. The fixed frequency outputs as REF, 24 MHz, and 48 MHz provide better than 0.5V /nS slew rate.

W83194BR-648 Maximum Ratings

PARAMETER                                                              RATING
Absolute 3.3V Core Supply Voltage                     -0.5V to +4.6V
Absolute 3.3V I/O Supple Voltage                       -0.5 V to +4.6 V
Operating 3.3V Core Supply Voltage                  3.135V to 3.465V
Operating 3.3V I/O Supple Voltage                     3.135V to 3.465V
Storage Temperature                                          -65 to +150
Ambient Temperature                                          -55 to +125
Operating Temperature                                       0 to +70
Input ESD Protection (Human body model)          2000V

W83194BR-648 Features

• Supports Intel Pentium 4 CPU with I²C.
• 2 pairs of differential CPU clocks
• 2 ZCLK for SIS chipsets
• 2 AGP clocks
• 1 SDRAM output clock for chipset
• 8 PCI synchronous clocks
• 1 24/48 MHz, 1 48 MHz
• 3 REF clocks
• Skew --- CPU to SDRAM < 1 ns, PCI to PCI < 500ps, AGP to AGP < 175ps
• Smooth frequency switch with selections from 66 to 200 MHz
• I²C 2-Wire serial interface and I2C read back
• Flexible spread spectrum to reduce EMI
• Programmable registers to enable/stop each output
• Packaged in 48-pin SSOP

W83194BR-648 Connection Diagram

W83194BR-97 General Description

The W83194BR-97 is a Clock Synthesizer for Intel Camino 820 chipset. W83194BR-97 provides all clocks required for high-speed RISC or CISC microprocessor and also provides 64 sets of different frequencies of CPU, PCI, 3V66, IOAPIC clocks or stepless frequecies programming by M/N value via I2C registers. All clocks are externally selectable with smooth transitions.

The W83194BR-97 provides I²C serial bus interface to program the registers to enable or disable each clock outputs and provides 0.5% and 0.25% center type spread spectrum to reduce EMI.

The W83194BR-97 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. High drive PCI 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.

W83194BR-97 Connection Diagram

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