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CD74HC221MG4 数据表(PDF) 2 Page - Texas Instruments |
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CD74HC221MG4 数据表(HTML) 2 Page - Texas Instruments |
2 / 21 page 2 Functional Diagram TRUTH TABLE INPUTS OUTPUTS AB RQ Q HXH L H XL H L H L ↑ H ↓ HH XX L L H LH ↑ (Note 3) (Note 3) H = High Voltage Level, L = Low Voltage Level, X = Irrelevant, ↑ = Transition from Low to High Level, ↓ = Transition from High to Low Level, = One High Level Pulse, = One Low Level Pulse NOTE: 1. For this combination the reset input must be low and the following sequence must be used: pin 1 (or 9) must be set high or pin 2 (or 10) set low; then pin 1 (or 9) must be low and pin 2 (or 10) set high. Now the reset input goes from low- to-high and the device will be triggered. 2R 11 2A 9 10 5 12 2Q 2Q 2B MONO 2 VCC 67 2CX 2CXRX 1R 3 1A 2 1 13 4 1Q 1Q 1B MONO 1 VCC 14 15 1CX 1CXRX 1CX 1RX 2CX 2RX CD54HC221, CD74HC221, CD74HCT221 |
类似零件编号 - CD74HC221MG4 |
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类似说明 - CD74HC221MG4 |
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