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74HC138; 74HCT138

Selection guide

Datasheet

74HC138; 74HCT138
(Product Specification)
23-Dec-05, 23 pages, 129 kB

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74HC138; 74HCT138 - 3-to-8 line decoder, demultiplexer; inverting

General description
Features
Products/packages
Quality/reliability/chemical content
Pricing/ordering/availability
Samples
Discontinued information
Applications
Block diagrams/pinning
Design support
Parametrics/similar products
Print/email
Disclaimers
All information hereunder is subject to the subsequent disclaimers

General description

The 74HC138; 74HCT138 is a high-speed Si-gate CMOS device and is pin compatible with Low-power Schottky TTL (LSTTL).



The 74HC138; 74HCT138 decoder accepts three binary weighted address inputs (A0, A1 and A3) and when enabled, provides 8 mutually exclusive active LOW outputs (Y0 to Y7).



The 74HC138; 74HCT138 features three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.



This multiple enable function allows easy parallel expansion of the 74HC138; 74HCT138 to a 1-of-32 (5 lines to 32 lines) decoder with just four 74HC138; 74HCT138 ICs and one inverter.



The 74HC138; 74HCT138 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. Not used enable inputs must be permanently tied to their appropriate active HIGH- or LOW-state.



The 74HC138; 74HCT138 is identical to the 74HC238; 74HCT238 but has inverting outputs.

Features

  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Complies with JEDEC standard no. 7A
  • Ideal for memory chip select decoding
  • Active LOW mutually exclusive outputs
  • ESD protection:
    • HBM EIA/JESD22-A114-C exceeds 2000 V
    • MM EIA/JESD22-A115-A exceeds 200 V
  • Specified from -40 Cel to +85 Cel and from -40 Cel to +125 Cel

Products/packages

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarkingECCN
74HC138BQ74HC138BQ,1159352 737 78115Volume productionSOT763-1
(DHVQFN16)
Reel Pack, SMD, 7"Standard Marking
74HC138D74HC138D,6529337 134 00652Volume productionSOT109Bulk Pack, CECCStandard Marking
74HC138D74HC138D,6539337 134 00653Volume productionSOT109Reel Pack, SMD, 13", CECCStandard Marking
74HC138DB74HC138DB,1129351 744 10112Volume productionSOT338-1
(SSOP16)
TubeStandard Marking
74HC138DB74HC138DB,1189351 744 10118Volume productionSOT338-1
(SSOP16)
Reel Pack, SMD, 13"Standard Marking
74HC138N74HC138N,6529336 692 90652Volume productionSOT38-4
(DIP16)
Bulk Pack, CECCStandard Marking
74HC138PW74HC138PW,1129351 743 80112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking
74HC138PW74HC138PW,1189351 743 80118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking
74HC138U74HC138U,0299338 243 20029Volume productionUncased die
74HCT138BQ74HCT138BQ,1159352 744 71115Volume productionSOT763-1
(DHVQFN16)
Reel Pack, SMD, 7"Standard Marking
74HCT138D74HCT138D,6529337 134 10652Volume productionSOT109-1
(SO16)
Bulk Pack, CECCStandard Marking
74HCT138D74HCT138D,6539337 134 10653Volume productionSOT109-1
(SO16)
Reel Pack, SMD, 13", CECCStandard Marking
74HCT138DB74HCT138DB,1129351 744 20112Volume productionSOT338-1
(SSOP16)
TubeStandard Marking
74HCT138DB74HCT138DB,1189351 744 20118Volume productionSOT338-1
(SSOP16)
Reel Pack, SMD, 13"Standard Marking
74HCT138N74HCT138N,6529336 699 20652Volume productionSOT38-4
(DIP16)
Bulk Pack, CECCStandard Marking
74HCT138PW74HCT138PW,1129351 873 20112Volume productionSOT403-1
(TSSOP16)
TubeStandard Marking
74HCT138PW74HCT138PW,1189351 873 20118Volume productionSOT403-1
(TSSOP16)
Reel Pack, SMD, 13"Standard Marking

Quality/reliability/chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree Conversion dateRHFIRF (FIT)MTBF (hours)MSL
74HC138BQ74HC138BQ,11574HC138BQ
Always Pb-free 6,621,51E+081
74HC138D74HC138D,65274HC138D
week 12, 2005 6,621,51E+081
74HC138D74HC138D,65374HC138D
week 12, 2005 6,621,51E+081
74HC138DB74HC138DB,11274HC138DB
week 12, 2005 6,621,51E+081
74HC138DB74HC138DB,11874HC138DB
week 12, 2005 6,621,51E+081
74HC138N74HC138N,65274HC138N
Always Pb-free 6,621,51E+08NA
74HC138PW74HC138PW,11274HC138PW
week 10, 2005 6,621,51E+081
74HC138PW74HC138PW,11874HC138PW
week 10, 2005 6,621,51E+081
74HC138U74HC138U,02974HC138U
week 18, 2005 6,621,51E+08NA
74HCT138BQ74HCT138BQ,11574HCT138BQ
Always Pb-free 6,621,51E+081
74HCT138D74HCT138D,65274HCT138D
week 12, 2005 6,621,51E+081
74HCT138D74HCT138D,65374HCT138D
week 12, 2005 6,621,51E+081
74HCT138DB74HCT138DB,11274HCT138DB
week 12, 2005 6,621,51E+081
74HCT138DB74HCT138DB,11874HCT138DB
week 12, 2005 6,621,51E+081
74HCT138N74HCT138N,65274HCT138N
Always Pb-free 6,621,51E+08NA
74HCT138PW74HCT138PW,11274HCT138PW
week 10, 2005 6,621,51E+081
74HCT138PW74HCT138PW,11874HCT138PW
week 10, 2005 6,621,51E+081

Quality and reliability disclaimer

Pricing/ordering/availability

Type numberOrdering code(12NC)Orderable part numberIndicative price/unit($)RegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
74HC138BQ9352 737 78115  74HC138BQ,115  0.2900NADIGI-KEY CORPORATION4,474 11/20/2009Buy onlineOrder samples
74HC138D9337 134 00652  74HC138D,652  0.1900NAARROW ELECTRONICS10,324 11/19/2009Buy onlinenot available
    NADIGI-KEY CORPORATION257 11/20/2009Buy online 
    NAMOUSER ELECTRONICS3,680 11/20/2009Buy online 
    NAFUTURE ELECTRONICS28,787 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING758 11/19/2009Buy online 
    NAMOUSER ELECTRONICS3,680 11/20/2009Buy online 
74HC138D9337 134 00653  74HC138D,653  0.1900NAARROW ELECTRONICS10,324 11/19/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION400 11/20/2009Buy online 
    NAMOUSER ELECTRONICS959 11/20/2009Buy online 
    NAFUTURE ELECTRONICS177,610 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING2,500 11/19/2009Buy online 
    NAARROW ELECTRONICS52,500 11/19/2009Buy online 
    NAMOUSER ELECTRONICS959 11/20/2009Buy online 
    ASIAWPI5,000250011/19/2009Buy online 
74HC138DB9351 744 10112  74HC138DB,112  0.1900      not available
74HC138DB9351 744 10118  74HC138DB,118  0.1900      not available
74HC138N9336 692 90652  74HC138N,652  0.1900NANEWARK288 11/20/2009Buy onlineOrder samples
    NAARROW ELECTRONICS4,877 11/19/2009Buy online 
    NADIGI-KEY CORPORATION211 11/20/2009Buy online 
    NAFUTURE ELECTRONICS50,438 11/19/2009Buy online 
    ASIAWPI2502511/19/2009Buy online 
74HC138PW9351 743 80112  74HC138PW,112  0.1900NAARROW ELECTRONICS1,406 11/19/2009Buy onlinenot available
74HC138PW9351 743 80118  74HC138PW,118  0.1900NAARROW ELECTRONICS1,406 11/19/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION4,123 11/20/2009Buy online 
    NAMOUSER ELECTRONICS135 11/20/2009Buy online 
    NAMOUSER ELECTRONICS135 11/20/2009Buy online 
    ASIASAC - Taiwanyes250011/20/2009Buy online 
74HC138U9338 243 20029  74HC138U,029        not available
74HCT138BQ9352 744 71115  74HCT138BQ,115  0.3200      not available
74HCT138D9337 134 10652  74HCT138D,652  0.1900NAARROW ELECTRONICS5,900 11/19/2009Buy onlinenot available
    NAFUTURE ELECTRONICS6,970 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING11,250 11/19/2009Buy online 
74HCT138D9337 134 10653  74HCT138D,653  0.1900NAARROW ELECTRONICS5,900 11/19/2009Buy onlinenot available
    NAAVNET ELECTRONICS MARKETING635 11/19/2009Buy online 
    NADIGI-KEY CORPORATION7,095 11/20/2009Buy online 
    NAMOUSER ELECTRONICS1,787 11/20/2009Buy online 
    NAFUTURE ELECTRONICS2,400 11/19/2009Buy online 
    NAMOUSER ELECTRONICS1,787 11/20/2009Buy online 
74HCT138DB9351 744 20112  74HCT138DB,112  0.2400      not available
74HCT138DB9351 744 20118  74HCT138DB,118  0.2400      not available
74HCT138N9336 699 20652  74HCT138N,652  0.1900NAARROW ELECTRONICS101 11/19/2009Buy onlineOrder samples
    NADIGI-KEY CORPORATION2,623 11/20/2009Buy online 
    NAMOUSER ELECTRONICS101 11/20/2009Buy online 
    NAFUTURE ELECTRONICS16,355 11/19/2009Buy online 
    NAAVNET ELECTRONICS MARKETING4,306 11/19/2009Buy online 
    NAMOUSER ELECTRONICS101 11/20/2009Buy online 
    ASIAWPI2502511/19/2009Buy online 
74HCT138PW9351 873 20112  74HCT138PW,112  0.1900      not available
74HCT138PW9351 873 20118  74HCT138PW,118  0.1900ASIASAC - Taiwanyes250011/20/2009Buy onlinenot available

Block diagrams/pinning

Design support

Support Documents

Parametrics/similar products

Type numberPackageDescriptionPropagation Delay(ns)VoltageNo. of PinsPower Dissipation ConsiderationsLogic Switching LevelsOutput Drive Capability
74HC138BQSOT763-1
(DHVQFN16)
3-to-8 Line Decoder/Demultiplexer; Inverting12@5V2.0-6.0 V16Low Power or Battery ApplicationsCMOS+/- 5.2 mA
74HC138DSOT109
3-to-8 Line Decoder/Demultiplexer; Inverting12@5V2.0-6.0 V16Low Power or Battery ApplicationsCMOS+/- 5.2 mA
74HC138DBSOT338-1
(SSOP16)
3-to-8 Line Decoder/Demultiplexer; Inverting12@5V2.0-6.0 V16Low Power or Battery ApplicationsCMOS+/- 5.2 mA
74HC138NSOT38-4
(DIP16)
3-to-8 Line Decoder/Demultiplexer; Inverting12@5V2.0-6.0 V16Low Power or Battery ApplicationsCMOS+/- 5.2 mA
74HC138PWSOT403-1
(TSSOP16)
3-to-8 Line Decoder/Demultiplexer; Inverting12@5V2.0-6.0 V16Low Power or Battery ApplicationsCMOS+/- 5.2 mA
74HC138UUncased die
3-to-8 Line Decoder/Demultiplexer; Inverting155 Volts +16Low Power or Battery ApplicationsCMOSLow
74HCT138BQSOT763-1
(DHVQFN16)
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled174.5-5.5 V16Low PowerTTL+/- 4 mA
74HCT138DSOT109-1
(SO16)
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled174.5-5.5 V16Low PowerTTL+/- 4 mA
74HCT138DBSOT338-1
(SSOP16)
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled174.5-5.5V16Low PowerTTL+/- 4 mA
74HCT138NSOT38-4
(DIP16)
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled174.5-5.5V16Low PowerTTL+/- 4 mA
74HCT138PWSOT403-1
(TSSOP16)
3-to-8 Line Decoder/Demultiplexer; Inverting; TTL Enabled174.5-5.5V16Low PowerTTL+/- 4 mA


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74HC138; 74HCT138 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.