Product Summary

The 74HC138 is a 3-to-8 line decoder/demultiplexer. It is pin compatible with Low-power Schottky TTL (LSTTL). The 74HC138 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.

Parametrics

74HC138 absolute maximum ratings: (1)supply voltage: -0.5V to +7 V; (2)input clamping current: ±20 mA; (3)output clamping current: ±20 mA; (4)output current: ±25 mA; (5)quiescent supply current: 50 mA; (6)ground current: -50 mA; (7)storage temperature: -65℃ to +150℃; (8)total power dissipation: 750 mW.

Features

74HC138 features: (1)Demultiplexing capability; (2)Multiple input enable for easy expansion; (3)Complies with JEDEC standard no. 7A; (4)Ideal for memory chip select decoding; (5)Active LOW mutually exclusive outputs; (6)ESD protection:HBM EIA/JESD22-A114-C exceeds 2000 V, MM EIA/JESD22-A115-A exceeds 200 V; (7)Specified from -40℃ to +85℃ and from -40℃ to +125℃.

Diagrams

74HC138 block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)
Quantity
74HC138BQ,115
74HC138BQ,115

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-TO-8 LINE DECODER

Data Sheet

0-2100: $0.20
2100-3000: $0.19
3000-6000: $0.18
6000-12000: $0.18
74HC138BQ-G
74HC138BQ-G

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-TO-8 LINE DECODER

Data Sheet

Negotiable 
74HC138D
74HC138D

Other


Data Sheet

Negotiable 
74HC138D,652
74HC138D,652

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-8 LINE DCOD/DMUX

Data Sheet

0-1: $0.06
1-25: $0.06
25-100: $0.05
100-250: $0.05
74HC138D,653
74HC138D,653

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX

Data Sheet

0-1: $0.24
1-25: $0.20
25-100: $0.16
100-250: $0.11
74HC138DB
74HC138DB

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX

Data Sheet

Negotiable 
74HC138DB,112
74HC138DB,112

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX

Data Sheet

0-1: $0.26
1-25: $0.22
25-100: $0.18
100-250: $0.15
74HC138DB,118
74HC138DB,118

NXP Semiconductors

Encoders, Decoders, Multiplexers & Demultiplexers 3-OF-8 DECODER/DEMUX

Data Sheet

0-1: $0.26
1-25: $0.22
25-100: $0.18
100-250: $0.15