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M74HC4520 数据表(PDF) 2 Page - STMicroelectronics |
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M74HC4520 数据表(HTML) 2 Page - STMicroelectronics |
2 / 12 page M74HC4520 2/12 INPUT AND OUTPUT EQUIVALENT CIRCUIT PIN DESCRIPTION TRUTH TABLE X : Don’t Care Z : High Impedance PIN No SYMBOL NAME AND FUNCTION 1, 9 1CLOCK, 2CLOCK Clock Inputs (LOW to HIGH, Edge-Triggered) 2, 10 1CE, 2CE Clock Enable Inputs 3, 4, 5, 6 1Q0 to 1Q3 Data Outputs 7, 15 1CLEAR, 2CLEAR Asynchronous Reset Inputs (Active LOW) 11, 12, 13, 14 2Q0 tO 2Q3 Data Outputs 8 GND Ground (0V) 16 Vcc Positive Supply Voltage INPUTS FUNCTION CLOCK CLOCK ENABLE CLEAR H L INCREMENT COUNTER L L INCREMENT COUNTER X L NO CHANGE X L NO CHANGE L L NO CHANGE H L NO CHANGE X X H Q0 THRU Q3=L |
类似零件编号 - M74HC4520 |
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类似说明 - M74HC4520 |
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