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74F1604 数据表(PDF) 2 Page - NXP Semiconductors |
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74F1604 数据表(HTML) 2 Page - NXP Semiconductors |
2 / 10 page Philips Semiconductors Product specification 74F1604 Latch 2 October 4, 1990 853 0088 00619 FEATURES • High impedance NPN base inputs for reduced loading (20 µA in high and low state) • Stores 16–bit wide data inputs, multiplexed 8–bit outputs • Propagation delay 7.0ns typical • Power supply current 70mA typical DESCRIPTION The 74F1604 is a dual octal transparent latch. Organized as 8–bit A and B latches, the latch outputs are connected by pairs to eight 2–input multiplexers. A select (SELECT A/B) input determines whether the A or B latch contents are multiplexed to the eight outputs. Data from the B inputs are selected when SELECT A/B is low; data from the A inputs are selected when SELECT A/B is high. Data enters the latch on the falling edge of the latch enable (LE) input. The latch remains transparent to the data inputs while LE is low, and stores the data that is present one setup time before the low–to–high latch enable transition. TYPE TYPICAL PROPAGATION DELAY TYPICAL SUPPLY CURRENT (TOTAL) 74F1604 7.0ns 70mA ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C PKG DWG # 28–pin plastic DIP N74F1604N SOT117-2 28–pin plastic SOL N74F1604D SOT136-1 INPUT AND OUTPUT LOADING AND FAN OUT TABLE PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW A0 – A7 Data inputs 1.0/0.033 20 µA/20µA B0 – B7 Data inputs 1.0/0.033 20 µA/20µA SELECT A/B Select input 1.0/0.033 20 µA/20µA LE Latch enable input (active low) 1.0/0.033 20 µA/20µA Q0 – Q7 Data outputs 50/33 1.0mA/20mA Note to input and output loading and fan out table One (1.0) FAST unit load is defined as: 20 µA in the high state and 0.6mA in the low state. PIN CONFIGURATION 1 2 3 4 5 6 7 8 9 10 19 20 21 22 23 24 25 26 27 28 VCC 11 12 13 14 15 16 17 18 LE SELECT A/B A0 B0 A1 B1 A2 B2 A3 B3 Q3 Q2 Q1 GND A4 B4 A5 B5 A6 B6 A7 B7 Q7 Q6 Q5 Q4 Q SF00553 LOGIC SYMBOL 1 2 LE SELCT A/B A0 B0 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6B6A7 B7 3 4 5678 9 10 27 26 25 24 2322 21 20 15 13 12 11 16 17 18 19 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 VCC = Pin 28 GND = Pin 14 SF00554 IEC/IEEE SYMBOL 3 4 5 6 7 8 9 10 27 26 25 24 23 22 21 20 1 G2 C1 1D 2 2 1 1D 2 15 13 12 11 16 17 18 19 SF00555 |
类似零件编号 - 74F1604 |
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类似说明 - 74F1604 |
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