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74238 IC

74238 IC

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  • Demultiplexing capability
  • Multiple input enable for easy expansion
  • Ideal for memory chip select decoding
  • Active HIGH mutually exclusive outputs
  • Multiple package options
  • Complies with JEDEC standard no. 7A

74238 IC

The 74HC Series 74HC238 decodes three binary weighted address inputs (A0, A1, and A2) to eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1 and E2 and E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '238 ICs and one inverter.

The 74238 IC 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. Inputs include clamp diodes. This enables the use of current-limiting resistors to interface inputs to voltages in excess of VCC.


Pinout of 74238 IC

Package Includes:

  • 1 x 74238 IC


Supply voltage range 2.0 to 6.0 V
Pins 16
Dimensions 7x7x2mm
Weight 1g

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  • Delivery time in Metro cities is 1-3 days, Others it is
    3-7 days. It varies based on location, reliant on courier services
  • Return window: 7 days from receipt unless stated
    otherwise. No refunds/replacements after
  • Returns only for non-working/damaged products are accepted
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1.What is the difference between 74HC238 and 74HCT238?

  • The 74HC238 and 74HCT238 are integrated circuits that serve as 3-to-8 line decoders/demultiplexers. That is, they can translate a three-bit binary input (A0, A1, and A2) into one of eight active-low outputs (Y0 to Y7). In addition, the devices feature three enable inputs (E1, E2, and E3) that can be used to regulate the output state or to expand the decoding capacity to a greater number of lines. The key distinction between the two devices is their interoperability with logic families. The 74HC238 supports high-speed CMOS logic levels, whereas the 74HCT238 supports TTL logic levels. 

2.What is 74HC238 IC?

  • The 74HC238 is a decoder/demultiplexer with a 3-to-8 line range. It translates three binary weighted address inputs (A0, A1, and A2) into eight mutually incompatible outputs (Y0 to Y7). There are three enable inputs on the gadget (E1 and E2 and E3). Unless E1 and E2 are both LOW and E3 is HIGH, every output will be LOW. Using only four '238 ICs, this multiple enable function enables simple parallel growth to a 1-of-32 (5 to 32 lines) decoder.