74AHC573; 74AHCT573

Octal D-type transparant latch; 3-state

The 74AHC573; 74AHCT573 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 74AHC573; 74AHCT573 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 74AHC573; 74AHCT573 is functionally identical to the 74AHC373; 74AHCT373, but has a different pin arrangement.


  • Balanced propagation delays
  • All inputs have a Schmitt trigger action
  • Common 3-state output enable input
  • Functionally identical to the 74AHC373; 74AHCT373
  • Inputs accept voltages higher than VCC
  • Input levels:
    • For 74AHC573: CMOS input level
    • For 74AHCT573: TTL input level
  • ESD protection:
    • HBM EIA/JESD22-A114E exceeds 2000 V
    • MM EIA/JESD22-A115-A exceeds 200 V
    • CDM EIA/JESD22-C101C exceeds 1000 V
  • Multiple package options
  • Specified from -40 ℃ to +85 ℃ and from -40 ℃ to +125 ℃


Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)tpd (ns)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74AHC573BQProduction2.0 - 5.5CMOS± 84.28low-40~125778.148DHVQFN20
74AHC573DProduction2.0 - 5.5CMOS± 84.28low-40~1258426.460SO20
74AHC573PWProduction2.0 - 5.5CMOS± 84.28low-40~1251004.444TSSOP20
74AHCT573BQProduction4.5 - 5.5TTL± 83.98low-40~125778.148DHVQFN20
74AHCT573DProduction4.5 - 5.5TTL± 83.98low-40~1258426.460SO20
74AHCT573PWProduction4.5 - 5.5TTL± 83.98low-40~1251004.444TSSOP20


Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT764-1Reel 7" Q1/T1ActiveAHC57374AHC573BQ,115
( 9352 805 55115 )
SOT163-1Reel 13" Q1/T1Active74AHC573D74AHC573D,118
( 9352 630 75118 )
Bulk PackActive74AHC573D74AHC573D,112
( 9352 630 75112 )
Reel 13" Q1/T1ActiveAHC57374AHC573PW,118
( 9352 630 72118 )
Bulk PackActiveAHC57374AHC573PW,112
( 9352 630 72112 )
SOT764-1Reel 7" Q1/T1ActiveAHCT57374AHCT573BQ,115
( 9352 905 32115 )
SOT163-1Reel 13" Q1/T1Active74AHCT573D74AHCT573D,118
( 9352 630 73118 )
Bulk PackActive74AHCT573D74AHCT573D,112
( 9352 630 73112 )
Reel 13" Q1/T1ActiveAHCT57374AHCT573PW,118
( 9352 630 74118 )
Bulk PackActiveAHCT57374AHCT573PW,112
( 9352 630 74112 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74AHC573BQ74AHC573BQ,11574AHC573BQAlways Pb-free84.96.621.51E811
74AHC573D74AHC573D,11874AHC573Dweek 13, 200584.96.621.51E811
74AHC573D74AHC573D,11274AHC573Dweek 13, 200584.96.621.51E811
74AHC573PW74AHC573PW,11874AHC573PWweek 7, 200584.96.621.51E811
74AHC573PW74AHC573PW,11274AHC573PWweek 7, 200584.96.621.51E811
74AHCT573BQ74AHCT573BQ,11574AHCT573BQAlways Pb-free84.96.621.51E811
74AHCT573D74AHCT573D,11874AHCT573Dweek 30, 200484.96.621.51E811
74AHCT573D74AHCT573D,11274AHCT573Dweek 30, 200484.96.621.51E811
74AHCT573PW74AHCT573PW,11874AHCT573PWweek 7, 200584.96.621.51E811
74AHCT573PW74AHCT573PW,11274AHCT573PWweek 7, 200584.96.621.51E811
Quality and reliability disclaimer

Documentation (13)

File nameTitleTypeDate
74AHC_AHCT573Octal D-type transparant latch; 3-stateData sheet2017-05-04
ahct573ahct573 IBIS modelIBIS model2013-04-07
ahc573ahc573 IBIS modelIBIS model2013-04-07
nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
SOT764-1_115DHVQFN20; Reel pack; SMD, 7" Q1/T1 Standard product orientation Orderable part number ending ,115 or X Ordering code (12NC) ending 115Packing2013-04-23
SOT764-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 20 terminals; 0.5 mm pitch; 4.5 mm x 2.5 mm x 1 mm bodyOutline drawing2018-11-14
SOT360-1_118TSSOP20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-15
SOT360-1plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-10-18
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT163-1_115Tape reel SMD; standard product orientation 12NC ending 115Packing2013-04-25
SOT163-1_118SO20; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-15
SOT163-1_518SO20; Reel dry pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,518 or Y Ordering code (12NC) ending 518Packing2014-12-16
SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm bodyOutline drawing2018-10-18


If you are in need of design/technical support, let us know and fill in the answer form, we'll get back to you shortly.


File nameTitleTypeDate
ahct573ahct573 IBIS modelIBIS model2013-04-07
ahc573ahc573 IBIS modelIBIS model2013-04-07


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