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74HC238DB NRND ECAD models PCB Symbol, Footprint & ECAD Model

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.

Not recommended for new designs (NRND), click here for the alternative product.
This product has been discontinued, click here for discontinuation information and replacement parts.

Orderable parts

Type number Orderable part number Ordering code (12NC) Package Buy from distributors
74HC238DB 74HC238DB,118 935189270118 SOT338-1 Order product
74HC238DB 74HC238DB,112 935189270112 SOT338-1 Order product

Features and benefits

  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Active HIGH mutually exclusive outputs
  • Multiple package options
  • Complies with JEDEC standard no. 7A
  • Input levels:
    • For 74HC238: CMOS level
    • For 74HCT238: TTL level
  • ESD protection:
    • HBM JESD22-A114F exceeds 2000 V
    • MM JESD22-A115-A exceeds 200 V
  • Specified from -40 °C to +85 °C and from -40 °C to +125 °C

Applications

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)Package name
74HC238DB
NRND
End of life2.0 - 6.0CMOS+/- 5.214low-40~12514842.0SSOP16

Package

All type numbers 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
74HC238DB
NRND
74HC238DB,118
( 9351 892 70118 )
Discontinued / End-of-lifeHC238
SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1
74HC238DB,112
( 9351 892 70112 )
Discontinued / End-of-lifeHC238Bulk Pack

Discontinuation information

Type numberOrderable part numberlabel.orderingCodeLast time buy dateLast time delivery dateReplacement productStatusComments
74HC238DB
NRND
74HC238DB,1189351892701182020-06-302020-12-3074HC238PWFull withdrawal
74HC238DB
NRND
74HC238DB,1129351892701122020-06-302020-12-3074HC238PWFull withdrawal

Quality, reliability & chemical content

All type numbers in the table below are discontinued. See the table Discontinuation information for more information.

Type numberOrderable part numberChemical contentRoHS / RHFMSLMSL leadfree
74HC238DB
NRND
74HC238DB,11874HC238DB11
74HC238DB
NRND
74HC238DB,11274HC238DB11
Quality and reliability disclaimer

Documentation (4)

File nameTitleTypeDate
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08

Support

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