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291PGI Datasheet(PDF) 2 Page - Integrated Device Technology |
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291PGI Datasheet(HTML) 2 Page - Integrated Device Technology |
2 / 10 page ICS291 TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER EPROM CLOCK SYNTHESIZER IDT™ / ICS™ TRIPLE PLL FIELD PROG. SPREAD SPECTRUM CLOCK SYNTHESIZER 2 ICS291 REV D 061306 Pin Assignment Pin Descriptions 13 4 12 5 11 VDD 8 9 10 GND CLK2 CLK5 CLK1 CLK3 CLK6 17 16 VDDO2 3 S1 GND S2 18 PDTS 1 S0 VDD 20 X2 19 14 2 7 GND VDDO1 VDD CLK4 15 6 20 pin (173 mil) TSSOP X1/ICLK Pin Number Pin Name Pin Type Pin Description 1 GND Power Connect to ground. 2 S0 Input Select pin 0. Internal pull-up resistor. 3 S1 Input Select pin 1. Internal pull-up resistor. 4VDD Power Connect to +3.3 V. 5 VDDO1 Power Power supply for outputs CLK1-CLK3. 6 CLK1 Output Output clock 1. Weak internal pull-down when tri-state. 7 CLK2 Output Output clock 2. Weak internal pull-down when tri-state. 8 CLK3 Output Output clock 3. Weak internal pull-down when tri-state. 9 GND Power Connect to ground. 10 X1/ICLK XI Crystal input. Connect this pin to a crystal or external input clock. 11 X2 XO Crystal Output. Connect this pin to a crystal. Float for clock input. 12 VDD Power Connect to +3.3 V. 13 VDDO2 Power Power supply for outputs CLK4-CLK6. 14 CLK4 Output Output clock 4. Weak internal pull-down when tri-state. 15 CLK5 Output Output clock 5. Weak internal pull-down when tri-state. 16 CLK6 Output Output clock 6. Weak internal pull-down when tri-state. 17 GND Power Connect to ground. 18 PDTS Input Power-down tri-state. Powers down entire chip and tri-states clock outputs when low. Internal pull-up resistor. 19 VDD Power Connect to +3.3 V. 20 S2 Input Select pin 2. Internal pull-up resistor. |
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