(China (Mainland))
Product Summary
74HC/HCT138 are high-speed Si-gate CMOS devicesand are pin compatible with low power Schottky TTL(LSTTL). They are specified in compliance with JEDECstandard no. 7A.The 74HC/HCT138 decoders accept three binaryweighted address inputs (A0, A1, A2) and when enabled,provide 8 mutually exclusive active LOW outputs (Y0 toY7).The “138” features three enable inputs: two active LOW(E1 and E2) and one active HIGH (E3). Every output will beHIGH unless E1 and E2 are LOW and E3 is HIGH.This multiple enable function allows easy parallel expansion of the “138” to a 1-of-32 (5 lines to 32 lines)decoder with just four “138” ICs and one inverter.The ”138” can be used as an eight output demultiplexer byusing one of the active LOW enable inputs as the datainput and the remaining enable inputs as strobes. Unusedenable inputs must be permanently tied to theirappropriate active HIGH or LOW state.The ”138” is identical to the “238” but has inverting outputs
Features
(1)Demultiplexing capability; (2)Multiple input enable for easy expansion; (3)Ideal for memory chip select decoding; (4)Active LOW mutually exclusive outputs; (5)Output capability: standard; (6)ICC category: MSI
Diagrams
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Pricing (USD) |
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 74HC138D |
Other |
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Data Sheet |
Negotiable |
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74HC138D,652 |
NXP Semiconductors |
Encoders, Decoders, Multiplexers & Demultiplexers 3-8 LINE DCOD/DMUX |
Data Sheet |
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74HC138D,653 |
NXP Semiconductors |
Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX |
Data Sheet |
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74HC138DB,118 |
NXP Semiconductors |
Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX |
Data Sheet |
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74HC138DB,112 |
NXP Semiconductors |
Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX |
Data Sheet |
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74HC138DB |
NXP Semiconductors |
Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX |
Data Sheet |
Negotiable |
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74HC138DR2G |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers DECODER DEMULTIPLEXR 1 OF 8 |
Data Sheet |
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74HC138DTR2G |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers DECODER DEMULTIPLEXR 1 OF 8 |
Data Sheet |
Negotiable |
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