Eight High-Current Latches in a Single

Package

High-Current 3-State True Outputs Can

Drive up to 15 LSTTL Loads

Full Parallel Access for Loading

description

This 8-bit latch features 3-state outputs designed

specifically for driving highly capacitive or

relatively low-impedance loads. It is particularly

suitable for implementing buffer registers, I/O

ports, bidirectional bus drivers, and working

registers.

The eight latches of the SN74HC373A are transparent D-type latches. While the latch-enable (LE) input is high,

the Q outputs follow the data (D) inputs. When LE is taken low, the Q outputs are latched at the levels that were

set up at the D inputs.

An output-enable (OE) input places the eight outputs in either a normal logic state (high or low logic levels) or

the high-impedance state. In the high-impedance state, the outputs neither load nor drive the bus lines

significantly. The high-impedance state and increased drive provide the capability to drive bus lines without

interface or pullup components.

OE does not affect the internal operations of the latches. Old data can be retained or new data can be entered

while the outputs are off.