Octal D-type transparent latch - NXP
Description
INTEGRATED CIRCUITS
DATA SHEET
74AHC573; 74AHCT573 Octal D-type transparent latch; 3-state
Product specification File under Integrated Circuits, IC06 1999 Sep 27
Philips Semiconductors
Product specification
Octal D-type transparent latch; 3-state
FEATURES • ESD protection: HBM EIA/JESD22-A114-A exceeds 2000 V MM EIA/JESD22-A115-A exceeds 200 V CDM EIA/JESD22-C101 exceeds 1000 V • Balanced propagation delays • All inputs have Schmitt-trigger actions • Common 3-state output enable input • Functionally identical to the ‘563’ and ‘373’ • Inputs accepts voltages higher than VCC • For AHC only: operates with CMOS input levels • For AHCT only: operates with TTL input levels • Specified from −40 to +85 and +125 °C.
QUICK REFERENCE DATA GND = 0 V; Tamb = 25 °C; tr = tf ≤ 3.
0 ns.
DESCRIPTION
74AHC573; 74AHCT573
The 74AHC/AHCT573 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL).
They are specified in compliance with JEDEC standard No.
7A.
The 74AHC/AHCT573 are octal D-type transparent latches featuring separate D-type inputs for each latch and 3-state outputs for bus oriented applications.
A Latch Enable (LE) input and an Output Enable (OE) input are common to all latches.
The ‘573’ consists of eight D-type transparent latches with 3-state true outputs.
When 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 D-input changes.
When LE is LOW the latches store the information that was present at the D-inputs a set-up time preceding the HIGH-to-LOW transition of LE.
When OE is LOW, the contents of the 8 latches are available at the outputs.
When 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 ‘573’ is functionally identical to the ‘533’, ‘563’ and ‘373’, but the ‘533’ and ‘563’ have inverted outputs and the ‘563’ and ‘373’ have a diff...
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