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.