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.

FEATURES

? High impedance NPN base inputs for reduced loading (20μA 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