74HC(T)138

3-to-8 line decoder/demultiplexer; inverting

The 74HC138; 74HCT138 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, E2 and E3). Every output will be HIGH 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 ‘138’ ICs and one inverter. The ‘138’ 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.

Features

  • Complies with JEDEC standard no. 7A
  • Input levels:
    • For 74HC138: CMOS level
    • For 74HCT138: TTL level
  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Active LOW mutually exclusive 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)tpd (ns)Power dissipation considerationsTamb (°C)Rth(j-a) (K/W)Ψth(j-top) (K/W)Rth(j-c) (K/W)Package name
74HC138BQProduction2.0 - 6.0CMOS± 5.212low-40~1259314.363DHVQFN16
74HC138DProduction2.0 - 6.0CMOS± 5.212low-40~1259310.053SO16
74HC138DB
NRND
Not for design in2.0 - 6.0CMOS+/- 5.212low-40~12514842.0SSOP16
74HC138PWProduction2.0 - 6.0CMOS± 5.212low-40~1251254.755.5TSSOP16
74HCT138BQProduction4.5 - 5.5TTL± 419low-40~1259314.363DHVQFN16
74HCT138DProduction4.5 - 5.5TTL± 419low-40~1259310.053SO16
74HCT138DB
NRND
Not for design in4.5 - 5.5TTL+/- 419low-40~12514842.0SSOP16
74HCT138PWProduction4.5 - 5.5TTL± 419low-40~1251254.755.5TSSOP16

Package

Type numberPackageOutline versionReflow-/Wave solderingPackingStatusMarkingOrderable part number, (Ordering code (12NC))
74HC138BQ
DHVQFN16
(SOT763-1)
SOT763-1Reel 7" Q1/T1ActiveHC13874HC138BQ,115
( 9352 737 78115 )
74HC138D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HC138D74HC138D,653
( 9337 134 00653 )
Bulk Pack, CECCActive74HC138D74HC138D,652
( 9337 134 00652 )
74HC138DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC13874HC138DB,118
( 9351 744 10118 )
Bulk PackActiveHC13874HC138DB,112
( 9351 744 10112 )
74HC138PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHC13874HC138PW,118
( 9351 743 80118 )
Bulk PackActiveHC13874HC138PW,112
( 9351 743 80112 )
74HCT138BQ
DHVQFN16
(SOT763-1)
SOT763-1Reel 7" Q1/T1ActiveHCT13874HCT138BQ,115
( 9352 744 71115 )
74HCT138D
SO16
(SOT109-1)
SOT109-1SO-SOJ-REFLOW
SO-SOJ-WAVE
Reel 13" Q1/T1 CECCActive74HCT138D74HCT138D,653
( 9337 134 10653 )
Bulk Pack, CECCActive74HCT138D74HCT138D,652
( 9337 134 10652 )
74HCT138DB
NRND

SSOP16
(SOT338-1)
SOT338-1SSOP-TSSOP-VSO-REFLOW
SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT13874HCT138DB,118
( 9351 744 20118 )
Bulk PackActiveHCT13874HCT138DB,112
( 9351 744 20112 )
74HCT138PW
TSSOP16
(SOT403-1)
SOT403-1SSOP-TSSOP-VSO-WAVE
Reel 13" Q1/T1ActiveHCT13874HCT138PW,118
( 9351 873 20118 )
Bulk PackActiveHCT13874HCT138PW,112
( 9351 873 20112 )

Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHS / RHFLeadfree conversion dateEFRIFRMTBF (hour)MSLMSL leadfree
74HC138BQ74HC138BQ,11574HC138BQAlways Pb-free84.96.621.51E811
74HC138D74HC138D,65374HC138Dweek 12, 200584.96.621.51E811
74HC138D74HC138D,65274HC138Dweek 12, 200584.96.621.51E811
74HC138DB
NRND
74HC138DB,11874HC138DBweek 12, 200511
74HC138DB
NRND
74HC138DB,11274HC138DBweek 12, 200511
74HC138PW74HC138PW,11874HC138PWweek 10, 200584.96.621.51E811
74HC138PW74HC138PW,11274HC138PWweek 10, 200584.96.621.51E811
74HCT138BQ74HCT138BQ,11574HCT138BQAlways Pb-free84.96.621.51E811
74HCT138D74HCT138D,65374HCT138Dweek 12, 200584.96.621.51E811
74HCT138D74HCT138D,65274HCT138Dweek 12, 200584.96.621.51E811
74HCT138DB
NRND
74HCT138DB,11874HCT138DBweek 12, 200511
74HCT138DB
NRND
74HCT138DB,11274HCT138DBweek 12, 200511
74HCT138PW74HCT138PW,11874HCT138PWweek 10, 200584.96.621.51E811
74HCT138PW74HCT138PW,11274HCT138PWweek 10, 200584.96.621.51E811
Quality and reliability disclaimer

Documentation (22)

File nameTitleTypeDate
74HC_HCT1383-to-8 line decoder/demultiplexer; invertingData sheet2018-03-26
AN11044Pin FMEA 74HC/74HCT familyApplication note2019-01-09
nexperia_selection_guide_2019_201901Selection guide 2019. Discretes, Logic and MOSFETsSelection guide2018-12-12
hchc Spice modelSPICE model2013-05-06
HCT_USER_GUIDEHC/T User GuideUser manual1997-10-31
SOT763-1_115DHVQFN16; Reel pack, SMD, 7" Q1/T1 standard product orientation Orderable part number ending ,115 or X Ordering code (12NC) ending 115Packing2016-07-05
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 bodyOutline drawing2018-11-14
SOT109-1_431SO16; Reel sulfur barrier pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-08-25
SOT109-1_118SO16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-24
SOT109-1plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.35 mm bodyOutline drawing2018-10-18
SO-SOJ-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SO-SOJ-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT403-1_623TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 623 or HL; Ordering code (12NC) ending 623Packing2013-05-15
SOT403-1_118TSSOP16; Reel pack; SMD, 13" Q1/T1 Standard product orientation Orderable part number ending ,118 or J Ordering code (12NC) ending 118Packing2013-04-08
SOT403-1_128TSSOP16; Reel pack; SMD, 13", Turned Q4/T2 180 deg product orientation Orderable part number ending ,128 or HP Ordering code (12NC) ending 128Packing2014-10-14
SOT403-1_653TSSOP16; Reel pack; SMD, 13"; Q1 Standard product orientation; Orderable part number ending, 653 or HL; Ordering code (12NC) ending 653Packing2013-05-15
SOT403-1plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.1 mm bodyOutline drawing2018-11-14
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08
SOT338-1_431SSOP16; Reel pack, SMD, 13" Q1/T1 standard product orientation Orderable part number ending ,431 or Z Ordering code (12NC) ending 431Packing2016-10-05
SOT338-1plastic, shrink small outline package; 16 leads; 0.65 mm pitch; 6.2 mm x 5.3 mm x 2 mm bodyOutline drawing2018-10-18
SSOP-TSSOP-VSO-REFLOWFootprint for reflow solderingReflow soldering2009-10-08
SSOP-TSSOP-VSO-WAVEFootprint for wave solderingWave soldering2009-10-08

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Models

File nameTitleTypeDate
hchc Spice modelSPICE model2013-05-06

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