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74HCT238PW

3-to-8 line decoder/demultiplexer

The 74HC238; 74HCT238 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '238 ICs and one inverter. The '238 can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

Alternatives

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HCT238PW 74HCT238PW,118 935189560118 SOT403-1 Order product

Features and benefits

  • Wide supply voltage range from 2.0 to 6.0 V

  • CMOS low power dissipation

  • High noise immunity

  • Demultiplexing capability

  • Multiple input enable for easy expansion

  • Ideal for memory chip select decoding

  • Active HIGH mutually exclusive outputs

  • Input levels:

    • For 74HC238: CMOS level

    • For 74HCT238: TTL level

  • Complies with JEDEC standards

    • JESD8C (2.7 V to 3.6 V)

    • JESD7A (2.0 V to 6.0 V)

  • Latch-up performance exceeds 100 mA per JESD 78 Class II Level B

  • 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)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HCT238PWProduction4.5 - 5.5TTL± 418low-40~1251264.855.6TSSOP16

PCB Symbol, Footprint and 3D Model

Model NameDescription

Package

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74HCT238PW74HCT238PW,118
( 9351 895 60118 ) 		ActiveHCT238
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_118

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

Type numberOrderable part number, (Ordering code (12NC))StatusMarkingPackagePackage informationReflow-/Wave solderingPacking
74HCT238PW74HCT238PW,112
( 9351 895 60112 ) 		Withdrawn / End-of-lifeHCT238
TSSOP16
(SOT403-1) 		SOT403-1SSOP-TSSOP-VSO-WAVE
SOT403-1_112

Discontinuation information

Type numberOrderable part numberOrdering codeLast time buy dateLast time delivery dateReplacement productStatusComments
74HCT238PW74HCT238PW,1129351895601122021-12-312022-06-3074HCT238PWVersion withdrawal

Environmental information

Type numberOrderable part numberChemical contentRoHSRHF-indicator
74HCT238PW74HCT238PW,11874HCT238PW

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

Type numberOrderable part numberChemical contentRoHSRHF-indicator
74HCT238PW74HCT238PW,11274HCT238PW
Quality and reliability disclaimer

Series

Documentation (6)

File nameTitleTypeDate
74HC_HCT2383-to-8 line decoder/demultiplexerData sheet2021-09-02
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
74HCT238PW_Nexperia_Product_Reliability74HCT238PW Nexperia Product ReliabilityQuality document2023-05-29
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1_118TSSOP16; Reel pack for SMD, 13"; Q1/T1 product orientationPacking information2020-02-14

Support

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PCB Symbol, Footprint and 3D Model

Model NameDescription

Ordering, pricing & availability

Type numberOrderable part numberOrdering code (12NC)PackingPacking quantityBuy online
74HCT238PW74HCT238PW,118935189560118SOT403-1_118- Order product

Sample

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Interactive datasheet