Features and benefits
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Balanced propagation delays
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All inputs have Schmitt-trigger action
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Demultiplexing capability
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Multiple input enable for easy expansion
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Ideal for memory chip select decoding
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Inputs accepts voltages higher than VCC
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For 74AHC138 only: operates with CMOS input levels
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For 74AHCT138 only: operates with TTL input levels
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ESD protection:
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HBM: ANSI/ESDA/JEDEC JS-001 class 2 exceeds 2000 V
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CDM: ANSI/ESDA/JEDEC JS-002 class C3 exceeds 1000 V
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Multiple package options
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Specified from -40 °C to +85 °C and from -40 °C to +125 °C
Parametrics
Type number | Product status | VCC (V) | Logic switching levels | Output drive capability (mA) | tpd (ns) | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Ψth(j-top) (K/W) | Rth(j-c) (K/W) | Package name |
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74AHC138BQ | Production | 2.0 - 5.5 | CMOS | ± 8 | 4.4 | low | -40~125 | 93 | 13.8 | 62 | DHVQFN16 |
74AHC138D | Production | 2.0 - 5.5 | CMOS | ± 8 | 4.4 | low | -40~125 | 93 | 9.7 | 52 | SO16 |
74AHC138PW | Production | 2.0 - 5.5 | CMOS | ± 8 | 4.4 | low | -40~125 | 125 | 4.6 | 54.7 | TSSOP16 |
74AHCT138BQ | Production | 4.5 - 5.5 | TTL | ± 8 | 4.4 | low | -40~125 | 93 | 13.8 | 62 | DHVQFN16 |
74AHCT138D | Production | 4.5 - 5.5 | TTL | ± 8 | 4.4 | low | -40~125 | 93 | 9.7 | 52 | SO16 |
74AHCT138PW | Production | 4.5 - 5.5 | TTL | ± 8 | 4.4 | low | -40~125 | 125 | 4.6 | 54.7 | TSSOP16 |
Package
Type number | Package | Package information | Reflow-/Wave soldering | Packing | Status | Marking | Orderable part number, (Ordering code (12NC)) |
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74AHC138BQ | ![]() DHVQFN16 (SOT763-1) | SOT763-1 | SOT763-1_115 | Active | AHC138 | 74AHC138BQ,115 ( 9352 855 72115 ) | |
74AHC138D | ![]() SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | SOT109-1_118 | Active | 74AHC138D | 74AHC138D,118 ( 9352 629 99118 ) |
74AHC138PW | ![]() TSSOP16 (SOT403-1) | SOT403-1 | SSOP-TSSOP-VSO-WAVE | SOT403-1_118 | Active | AHC138 | 74AHC138PW,118 ( 9352 630 00118 ) |
74AHCT138BQ | ![]() DHVQFN16 (SOT763-1) | SOT763-1 | SOT763-1_115 | Active | AHT138 | 74AHCT138BQ,115 ( 9352 855 73115 ) | |
74AHCT138D | ![]() SO16 (SOT109-1) | SOT109-1 | SO-SOJ-REFLOW SO-SOJ-WAVE | SOT109-1_118 | Active | 74AHCT138D | 74AHCT138D,118 ( 9352 629 97118 ) |
74AHCT138PW | ![]() TSSOP16 (SOT403-1) | SOT403-1 | SSOP-TSSOP-VSO-WAVE | SOT403-1_118 | Active | AHCT138 | 74AHCT138PW,118 ( 9352 629 98118 ) |
Discontinuation information
Type number | Orderable part number, (Ordering code (12NC)) | Last time buy date | Last time delivery date | Replacement product | Status | Comments |
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74AHC138D | 935262999112 | 2021-12-31 | 2022-06-30 | 74AHC138D | ||
74AHC138PW | 935263000112 | 2021-12-31 | 2022-06-30 | 74AHC138PW | ||
74AHCT138D | 935262997112 | 2021-12-31 | 2022-06-30 | 74AHCT138D | ||
74AHCT138PW | 935262998112 | 2021-12-31 | 2022-06-30 | 74AHCT138PW |
Environmental information
Type number | Orderable part number | Chemical content | RoHS | RHF-indicator | Leadfree conversion date |
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74AHC138BQ | 74AHC138BQ,115 | 74AHC138BQ | ![]() | Always Pb-free | |
74AHC138D | 74AHC138D,118 | 74AHC138D | ![]() | week 35, 2004 | |
74AHC138PW | 74AHC138PW,118 | 74AHC138PW | ![]() | week 10, 2005 | |
74AHCT138BQ | 74AHCT138BQ,115 | 74AHCT138BQ | ![]() | Always Pb-free | |
74AHCT138D | 74AHCT138D,118 | 74AHCT138D | ![]() | week 35, 2004 | |
74AHCT138PW | 74AHCT138PW,118 | 74AHCT138PW | ![]() | week 10, 2005 |
Documentation (10)
File name | Title | Type | Date |
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74AHC_AHCT138 | 3-to-8 line decoder/demultiplexer; inverting | Data sheet | 2023-09-04 |
ahc138 | ahc138 IBIS model | IBIS model | 2013-04-07 |
ahct138 | ahct138 IBIS model | IBIS model | 2013-04-07 |
SOT763-1 | plastic, 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 body | Package information | 2023-05-11 |
SO-SOJ-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
SO-SOJ-REFLOW | Footprint for reflow soldering | Reflow soldering | 2009-10-08 |
WAVE_BG-BD-1 | Wave soldering profile | Wave soldering | 2021-09-08 |
SOT109-1 | plastic, small outline package; 16 leads; 1.27 mm pitch; 9.9 mm x 3.9 mm x 1.75 mm body | Package information | 2023-11-07 |
SOT403-1 | plastic, thin shrink small outline package; 16 leads; 5 mm x 4.4 mm x 1.2 mm body | Package information | 2023-11-08 |
SSOP-TSSOP-VSO-WAVE | Footprint for wave soldering | Wave soldering | 2009-10-08 |
Support
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Ordering, pricing & availability
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