74F1604

INTEGRATED CIRCUITS 74F1604 Latch Product specification IC15 Data Handbook 1990 Oct 04 Philips Semiconductors Philips Semiconductors Product specification Latch 74F1604 FEATURES High impedance NPN base inputs for reduced loading Propagation delay 7.0ns typical Power supply current 70mA typical DESCRIPTION PIN CONFIGURATION LE 1 SELECT A/B 2 A0 3 B0 4 A1 5 B1 6 A2 7 B2 8 A3 9 B3 10 Q3 11 Q2 12 Q1 13 GND 14 28 V CC 27 A4 26 B4 25 A5 24 B5 23 A6 22 B6 21 A7 20 B7 19 Q7 18 Q6 17 Q5 16 Q4 15 Q (20µA in high and low state) Stores 16–bit wide data inputs, multiplexed 8–bit outputs 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. TYPICAL PROPAGATION DELAY 7.0ns TYPICAL SUPPLY CURRENT (TOTAL) 70mA SF00553 TYPE 74F1604 LOGIC SYMBOL 3 4 5 6 7 8 9 10 27 26 25 24 2322 21 20 ORDERING INFORMATION ORDER CODE DESCRIPTION COMMERCIAL RANGE VCC = 5V ±10%, Tamb = 0°C to +70°C 28–pin plastic DIP 28–pin plasti...