×

74HC240; 74HCT240

Octal buffer/line driver; 3-state; inverting

The 74HC240; 74HCT240 is an 8-bit inverting buffer/line driver with 3-state outputs. The device can be used as two 4-bit buffers or one 8-bit buffer. The device features two output enables (1OE and 2OE), each controlling four of the 3-state outputs. A HIGH on nOE causes the outputs to assume a high-impedance OFF-state. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Features and benefits

  • Wide supply voltage range from 2.0 V to 6.0 V
  • CMOS low power dissipation
  • High noise immunity
  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B
  • Complies with JEDEC standards:
    • JESD8C (2.7 V to 3.6 V)
    • JESD7A (2.0 V to 6.0 V)
  • Input levels:
    • For 74HC240: CMOS level
    • For 74HCT240: TTL level
  • Inverting 3-state outputs
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Multiple package options
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Parametrics

Type numberProduct statusVCC (V)Logic switching levelsOutput drive capability (mA)fmax (MHz)No of bitsPower dissipation considerationsTamb (°C)Rth(j-a) (K/W)Rth(j-c) (K/W)Package name
74HC240BQProduction2.0 - 6.0CMOS± 7.8368low-40~1257850DHVQFN20
74HC240DProduction2.0 - 6.0CMOS± 7.8368low-40~1258561SO20
74HC240PWProduction2.0 - 6.0CMOS± 7.8368low-40~12510044.7TSSOP20
74HCT240BQProduction4.5 - 5.5TTL± 6368low-40~1257850DHVQFN20
74HCT240DProduction4.5 - 5.5TTL± 6368low-40~1258561SO20
74HCT240PWProduction4.5 - 5.5TTL± 6368low-40~12510044.7TSSOP20

Package

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC240BQ
DHVQFN20
(SOT764-1)
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveHC240BQ74HC240BQ,115
( 9352 836 83115 )
74HC240D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Reel 13" Q1/T1 CECCActive74HC240D74HC240D,653
( 9337 134 40653 )
74HC240PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC24074HC240PW,118
( 9351 858 10118 )
74HCT240BQ
DHVQFN20
(SOT764-1)
SOT764-1Reel 7” Q1/T1 or Q2/T3ActiveHCT24074HCT240BQ,115
( 9352 836 84115 )
74HCT240D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Reel 13" Q1/T1 CECCActive74HCT240D74HCT240D,653
( 9337 134 50653 )
74HCT240PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT24074HCT240PW,118
( 9351 895 70118 )

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberPackagePackage informationReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC240D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Bulk Pack, CECCDiscontinued / End-of-life74HC240D74HC240D,652
( 9337 134 40652 )
74HC240PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeHC24074HC240PW,112
( 9351 858 10112 )
74HCT240D
SO20
(SOT163-1)
SOT163-1WAVE_BG-BD-1
Bulk Pack, CECCDiscontinued / End-of-life74HCT240D74HCT240D,652
( 9337 134 50652 )
74HCT240PW
TSSOP20
(SOT360-1)
SOT360-1SSOP-TSSOP-VSO-WAVE
Bulk PackDiscontinued / End-of-lifeHCT24074HCT240PW,112
( 9351 895 70112 )

Discontinuation information

Type numberOrderable part number, (Ordering code (12NC))Last time buy dateLast time delivery dateReplacement productStatusComments
74HC240D933713440652
74HC240PW935185810112
74HCT240D933713450652
74HCT240PW935189570112

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC240BQ74HC240BQ,11574HC240BQAlways Pb-free29.90.91.11E911
74HC240D74HC240D,65374HC240Dweek 27, 200429.90.91.11E911
74HC240PW74HC240PW,11874HC240PWweek 7, 200529.90.91.11E911
74HCT240BQ74HCT240BQ,11574HCT240BQAlways Pb-free29.90.91.11E911
74HCT240D74HCT240D,65374HCT240Dweek 30, 200429.90.91.11E911
74HCT240PW74HCT240PW,11874HCT240PWweek 7, 200529.90.91.11E911

The variants in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC240D74HC240D,65274HC240Dweek 27, 200429.90.91.11E911
74HC240PW74HC240PW,11274HC240PWweek 7, 200529.90.91.11E911
74HCT240D74HCT240D,65274HCT240Dweek 30, 200429.90.91.11E911
74HCT240PW74HCT240PW,11274HCT240PWweek 7, 200529.90.91.11E911
Quality and reliability disclaimer

Documentation (9)

File nameTitleTypeDate
74HC_HCT240Octal buffer/line driver; 3-state; invertingData sheet2021-09-03
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
hchc Spice modelSPICE model2013-05-06
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
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 bodyPackage information2021-08-17
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT360-1plastic, thin shrink small outline package; 20 leads; 0.65 mm pitch; 6.5 mm x 4.4 mm x 1.1 mm bodyPackage information2020-04-21
SOT163-1plastic, small outline package; 20 leads; 1.27 mm pitch; 12.8 mm x 7.5 mm x 2.65 mm bodyPackage information2020-04-21
WAVE_BG-BD-1Wave soldering profileWave soldering2021-09-08

Support

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.

Models

File nameTitleTypeDate
hchc Spice modelSPICE model2013-05-06

Sample

As a Nexperia customer you can order samples via our sales organization or directly via our Online Sample Store: https://extranet.nexperia.com.

Sample orders normally take 2-4 days for delivery.

If you do not have a direct account with Nexperia our network of global and regional distributors is available and equipped to support you with Nexperia samples.