8-bit binary counter with output register; 3-state

The 74HC590 is an 8-bit binary counter with a storage register and 3-state outputs. The storage register has parallel (Q0 to Q7) outputs. The binary counter features master reset counter (MRC) and count enable (CE) inputs. The counter and storage register have separate positive edge triggered clock (CPC and CPR) inputs. If both clocks are connected together, the counter state is always one count ahead of the register. Internal circuitry prevents clocking from the clock enable. A ripple carry output (RCO) is provided for cascading. Cascading is accomplished by connecting RCO of the first stage to CE of the second stage. Cascading for larger count chains can be accomplished by connecting RCO of each stage to the counter clock (CPC) input of the following stage. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Features and benefits

  • Counter and register have independent clock inputs
  • Counter has master reset
  • Complies with JEDEC standard no. 7A
  • Multiple package options
  • Input levels:
    • For 74HC590: CMOS level
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
    • CDM JESD22-C101C exceeds 2000 V
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C


Type numberProduct statusVCC (V)Output drive capability (mA)Logic switching levelstpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC590BQProduction2.0 - 6.0± 5.2CMOS19low-40~1258810.356DHVQFN16
74HC590DProduction2.0 - 6.0± 5.2CMOS19low-40~125877.446SO16
74HC590PWProduction2.0 - 6.0± 5.2CMOS19low-40~1251203.449.1TSSOP16


Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
SOT763-1Reel 7” Q1/T1 or Q2/T3ActiveHC59074HC590BQ,115
( 9352 788 34115 )
Reel 13" Q1/T1Active74HC590D74HC590D,118
( 9352 788 27118 )
Bulk PackActive74HC590D74HC590D,112
( 9352 788 27112 )
Reel 13" Q1/T1ActiveHC59074HC590PW,118
( 9352 788 36118 )
Bulk PackActiveHC59074HC590PW,112
( 9352 788 36112 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC590BQ74HC590BQ,11574HC590BQAlways Pb-free84.96.621.51E811
74HC590D74HC590D,11874HC590Dweek 13, 200584.96.621.51E811
74HC590D74HC590D,11274HC590Dweek 13, 200584.96.621.51E811
74HC590PW74HC590PW,11874HC590PWAlways Pb-free84.96.621.51E811
74HC590PW74HC590PW,11274HC590PWAlways Pb-free84.96.621.51E811
Quality and reliability disclaimer

Documentation (11)

File nameTitleTypeDate
74HC5908-bit binary counter with output register; 3-stateData sheet2017-03-17
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
Nexperia_Selection_guide_2020Nexperia Selection Guide 2020Selection guide2020-01-31
Nexperia_Selection_guide_2021Nexperia Selection Guide 2021Selection guide2021-01-08
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SOT763-1plastic, leadless dual in-line compatible thermal enhanced very thin quad flat package; 16 terminals; 0.5 mm pitch; 3.5 mm x 2.5 mm x 1 mm bodyPackage information2020-04-21
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm bodyPackage information2021-01-06
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21


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