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W83194BR-903 Datasheet(PDF) 5 Page - Winbond |
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W83194BR-903 Datasheet(HTML) 5 Page - Winbond |
5 / 26 page W83194BR-903/W83194BG-903 Publication Release Date: May 2006 - 1 - Revision 1.0 1. GENERAL DESCRIPTION The W83194BR-903 is a Clock Synthesizer for VIA PT880/PM880 chipset. W83194BR-903 provides all clocks required for high-speed microprocessor and provides step-less frequency programming and 32 different frequencies of CPU, PCI, and AGP clocks setting, support two 25MHz clock outputs, all clocks are externally selectable with smooth transitions. The W83194BR-903 provides I 2C 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 or programmable S.S.T. scale to reduce EMI. The W83194BR-903 also has watchdog timer and reset output pin to support auto-reset when systems hanging caused by improper frequency setting. The W83194BR-903 accepts a 14.318 MHz reference crystal as its input and runs on a 3.3V supply. 2. PRODUCT FEATURES • 3 0.7V current-mode Differential pairs clock outputs • 2 2.5V 25MHz clock outputs • 3 AGP clock outputs • 10 PCI synchronous clocks • 1 24_48Mhz clock output for super I/O. • 1 48 MHz clock output for USB. • 2 14.318MHz REF clock outputs. • AGP/PCI clock out supports synchronous and asynchronous mode • Smooth frequency switch with selections from 100 to 400MHz • Step-less frequency programming • I2C 2-Wire serial interface and support byte read/write and block read/write. • -0.5% and +/- 0.25% center type spread spectrum • Programmable S.S.T. scale to reduce EMI • Programmable registers to enable/stop each output and select modes • Programmable clock outputs Slew rate control and Skew control • Watch Dog Timer and RESET# output pins • 48-pin SSOP package |
Similar Part No. - W83194BR-903_06 |
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Similar Description - W83194BR-903_06 |
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