74HC573BQ: Octal D-type transparent latch; 3-state

The 74HC573; 74HCT573 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. 7A.

The 74HC573; 74HCT573 has octal D-type transparent latches featuring separate D-type inputs for each latch and 3-state true outputs for bus-oriented applications. A latch enable (LE) input and an output enable (OE) input are common to all latches.

When LE is HIGH, data at the Dn inputs enter 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 74HC573; 74HCT573 is functionally identical to:

74HC573BQ: Product Block Diagram
Outline 3d SOT764-1
Data Sheets (1)
Name/DescriptionModified Date
Octal D-type transparent latch; 3-state (REV 7.0) PDF (214.0 kB) 74HC_HCT573 [English]04 Mar 2016
Application Notes (3)
Name/DescriptionModified Date
A metastability primer (REV 1.0) PDF (40.0 kB) AN219 [English]13 Mar 2013
Live Insertion Aspects of Philips Logic Families (REV 1.0) PDF (73.0 kB) AN252 [English]13 Mar 2013
Pin FMEA 74HC/74HCT family (REV 1.0) PDF (51.0 kB) AN11044 [English]16 Mar 2011
Users Guides (1)
Name/DescriptionModified Date
HC/T User Guide (REV 1.0) PDF (508.0 kB) HCT_USER_GUIDE [English]01 Nov 1997
Package Information (1)
Name/DescriptionModified Date
plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 20 terminals; body 2.5 x 4.5 x... (REV 1.0) PDF (190.0 kB) SOT764-1 [English]08 Feb 2016
Packing (1)
Name/DescriptionModified Date
DHVQFN20; Reel pack; SMD, 7" Q1/T1 Standard product orientation Orderable part number ending ,115 or... (REV 4.0) PDF (203.0 kB) SOT764-1_115 [English]23 Apr 2013
Package Information
Product IDPackage DescriptionOutline VersionReflow/Wave SolderingPackingProduct StatusPart NumberOrdering code(12NC)MarkingChemical ContentRoHS / Pb Free / RHFLeadFree Conversion DateEFRIFR(FIT)MTBF(hour)MSLMSL LF
74HC573BQSOT764-1Reel 7" Q1/T1Active74HC573BQ,115 (9352 736 94115)HC57374HC573BQAlways Pb-free84.96.621.51E811
Octal D-type transparent latch; 3-state 74HCT573PW
A metastability primer 74AHC573PW
Live Insertion Aspects of Philips Logic Families 74HC_T_245_Q100
Pin FMEA 74HC/74HCT family 74HC_T_597_Q100
HC/T User Guide 74HCU04PW
plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads; 20 terminals; body 2.5 x 4.5 x... 74LVC_H_245A_Q100
DHVQFN20; Reel pack; SMD, 7" Q1/T1 Standard product orientation Orderable part number ending ,115 or... 74LVC_H_245A_Q100
74HC_T_573
74VHC_T_245