(China (Mainland))
Product Summary
The MC74HC138A is a 1-of-8 decoder/demultiplexer. The MC74HC138A is identical in pinout to the LS138. The device inputs are compatible with standard CMOS outputs; with pullup resistors, they are compatible with LSTTL outputs. The MC74HC138A decodes a three–bit Address to one–of–eight active–low outputs. This device MC74HC138A features three Chip Select inputs, two active–low and one active–high to facilitate the demultiplexing, cascading, and chip–selecting functions. The demultiplexing function is accomplished by using the Address inputs to select the desired device output; one of the Chip Selects is used as a data input while the other Chip Selects are held in their active states.
Parametrics
MC74HC138A absolute maximum ratings: (1)VCC, DC Supply Voltage (Referenced to GND): – 0.5 to + 7.0 V; (2)Vin, DC Input Voltage (Referenced to GND): – 0.5 to VCC + 0.5 V; (3)Vout, DC Output Voltage (Referenced to GND): – 0.5 to VCC + 0.5V; (4)Iin, DC Input Current, per Pin: ± 20 mA; (5)Iout, DC Output Current, per Pin: ± 25 mA; (6)ICC, DC Supply Current, VCC and GND Pins: ±50 mA; (7)PD, Power Dissipation: 750mW; (8)Tstg, Storage Temperature: – 65 to + 150℃; (9)TL, Lead Temperature, 1 mm from Case for 10 Seconds: 260℃.
Features
MC74HC138A features: (1)Output Drive Capability: 10 LSTTL Loads; (2)Outputs Directly Interface to CMOS, NMOS and TTL; (3)Operating Voltage Range: 2.0 to 6.0 V; (4)Low Input Current: 1.0 μA; (5)High Noise Immunity Characteristic of CMOS Devices; (6)In Compliance with the Requirements Defined by JEDEC Standard No. 7A; (7)Chip Complexity: 100 FETs or 29 Equivalent Gates.
Diagrams
| Image | Part No | Mfg | Description |  |
Pricing (USD) |
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 MC74HC138A |
Other |
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Data Sheet |
Negotiable |
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MC74HC138AD |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
Negotiable |
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MC74HC138ADR2G |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
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MC74HC138ADG |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
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MC74HC138ADTR2 |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
Negotiable |
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MC74HC138ADR2 |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
Negotiable |
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MC74HC138ADTR2G |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
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MC74HC138ANG |
ON Semiconductor |
Encoders, Decoders, Multiplexers & Demultiplexers 2-6V 1-of-8 Decoder |
Data Sheet |
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