1. General description
The 74AHC373; 74AHCT373 is a high-speed Si-gate CMOS device and is pin compatible
with Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7-A.
The 74AHC373; 74AHCT373 consists of eight D-type transparent latches featuring
separate D-type inputs for each latch and 3-state true outputs for bus oriented
applications. A latch enable input (LE) and an output enable input (OE) are common to all
latches.
When pin LE is HIGH, data at the Dn inputs enters the latches. In this condition the
latches are transparent, i.e. a latch output will change state each time its corresponding
Dn input changes. When pin LE is LOW, the latches store the information that is present
at the Dn inputs, after a set-up time preceding the HIGH-to-LOW transition of LE.
When pin OE is LOW, the contents of the 8 latches are available at the outputs. When
pin OE is HIGH, the outputs go to the high-impedance OFF-state. Operation of the OE
input does not affect the state of the latches.
The 74AHC373; 74AHCT373 is functionally identical to the 74AHC573; 74AHCT573, but
has a different pin arrangement.
2. Features
n Balanced propagation delays
n All inputs have a Schmitt-trigger action
n Common 3-state output enable input
n Inputs accepts voltages higher than V
CC
n Functionally identical to the 74AHC573; 74AHCT573
n Input levels:
u For 74AHC373: CMOS input level
u For 74AHCT373: TTL input level
n ESD protection:
u HBM EIA/JESD22-A114E exceeds 2000 V
u MM EIA/JESD22-A115-A exceeds 200 V
u CDM EIA/JESD22-C101C exceeds 1000 V
n Multiple package options
n Specified from −40 °C to +85 °C and from −40 °C to +125 °C
74AHC373; 74AHCT373
Octal D-type transparant latch; 3-state
Rev. 03 — 20 May 2008 Product data sheet
