MC74AC138: 1-of-8 Decoder/Demultiplexer

The MC74AC138/74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for high-speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three MC74AC138/74ACT138 devices or a 1-of-32 decoder using four MC74AC138/ 74ACT138 devices and one inverter.

Features
  • Demultiplexing Capability
  • Multiple Input Enable for Easy Expansion
  • Active LOW Mutually Exclusive Outputs
  • Outputs Source/Sink 24 mA
  • ACT138 Has TTL Compatible Inputs
  • These devices are available in Pb-free package(s). Specifications herein apply to both standard and Pb-free devices. Please see our website at www.onsemi.com for specific Pb-free orderable part numbers, or contact your local ON Semiconductor sales office or representative.
Simulation Models (4)
Document TitleDocument ID/SizeRevisionRevision Date
IBIS Model for MC74AC138D_33MC74AC138D_33.IBS (9.0kB)0
IBIS Model for MC74AC138D_5MC74AC138D_5.IBS (6.0kB)0
IBIS Model for MC74AC138N_33MC74AC138N_33.IBS (9.0kB)0
IBIS Model for MC74AC138N_5MC74AC138N_5.IBS (6.0kB)0
Package Drawings (2)
Document TitleDocument ID/SizeRevision
SOIC 16 LEAD751B-05 (38.2kB)K
TSSOP-16948F-01 (41.7kB)B
Data Sheets (1)
Document TitleDocument ID/SizeRevisionRevision Date
1-of-8 Decoder/DemultiplexerMC74AC138/D (99kB)7
Order Information
ProductStatusCompliancePackageMSL*ContainerBudgetary Price/Unit
MC74AC138DGActivePb-free Halide freeSOIC-16751B-051Tube48$0.2533
MC74AC138DR2GActivePb-free Halide freeSOIC-16751B-051Tape and Reel2500$0.2533
MC74AC138DTR2GActivePb-free Halide freeTSSOP-16948F-011Tape and Reel2500$0.2441
Specifications
ProductChannelsVCC Min (V)VCC Max (V)tpd Max (ns)IO Max (mA)
MC74AC138DG1269.524
MC74AC138DR2G1269.524
MC74AC138DTR2G1269.524
1-of-8 Decoder/Demultiplexer (99kB) MC74ACT138
IBIS Model for MC74AC138D_33 MC74AC138
IBIS Model for MC74AC138D_5 MC74AC138
IBIS Model for MC74AC138N_33 MC74AC138
IBIS Model for MC74AC138N_5 MC74AC138
SOIC 16 LEAD MC14504B
TSSOP-16 MC14504B