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74F821 数据表(PDF) 3 Page - NXP Semiconductors |
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74F821 数据表(HTML) 3 Page - NXP Semiconductors |
3 / 18 page Philips Semiconductors Product specification 74F821/822/823/824/825/826 Bus interface registers 1996 Jan 05 3 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW Dn Data inputs 1.0/1.0 20 µA/0.6mA 74F821 CP Clock input 1.0/1.0 20 µA/0.6mA 74F822 OE Output enable input (active low) 1.0/3.0 20 µA/1.8mA Qn, Qn Data outputs 1200/106.7 24mA/64mA Dn Data inputs 1.0/1.0 20 µA/0.6mA CP Clock input 1.0/1.0 20 µA/0.6mA 74F823 CE Clock enable input (active low) 1.0/3.0 20 µA/1.8mA 74F824 MR Master reset input (active low) 1.0/3.0 20 µA/1.8mA OE Output enable input (active low) 1.0/3.0 20 µA/1.8mA Qn, Qn Data outputs 1200/106.7 24mA/64mA Dn Data inputs 1.0/1.0 20 µA/0.6mA CP Clock input 1.0/1.0 20 µA/0.6mA 74F825 CE Clock enable input (active low) 1.0/3.0 20 µA/1.8mA 74F826 MR Master reset input (active low) 1.0/3.0 20 µA/1.8mA OE Output enable input (active low) 1.0/3.0 20 µA/1.8mA Qn, Qn Data outputs 1200/106.7 24mA/64mA NOTE: One (1.0) FAST unit load is defined as: 20 µA in the high state and 0.6mA in the low state. PIN CONFIGURATION – 74F821 24 23 22 21 20 19 18 17 16 15 14 13 12 10 11 9 8 7 6 5 4 3 2 1 GND OE CP Q0 Q3 Q4 Q5 Q6 VCC Q7 Q1 Q2 Q8 Q9 D0 D3 D4 D5 D6 D7 D1 D2 D8 D9 SF00482 LOGIC SYMBOL – 74F821 CP OE Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 13 1 D0 D1 D2 D3 D4 D5 D6 D7 23 45 67 8 9 23 22 21 20 19 18 17 16 VCC = Pin 24 GND = Pin 12 D8 D9 10 11 Q8 Q9 15 14 SF00483 |
类似零件编号 - 74F821 |
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类似说明 - 74F821 |
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