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74HC23874 Series

三线-八线译码器/多路分配器

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74HC23874 Series Product Details

The 74HC238 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A.

The 74HC238 decoders accept three binary weighted address inputs (A0, A1, A2) and when enabled,provide 8 mutually exclusive active HIGH outputs (Y0 to Y7).

The 74HC238 features three enable inputs: two active LOW (1 and 2) and one active HIGH (E3). Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion of the HC238 to a 1-of-32 (5 lines to 32 lines) decoder with just four HC238 ICs and one inverter.

The 74HC238 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. Unused enable inputs must be permanently tied to their appropriate active HIGH or LOW state.

The 74HC238 is identical to the 74HC138 but has non-inverting outputs.

FEATURES

Demultiplexing capability

Multiple input enable for easy expansion

Ideal for memory chip select decoding

Active HIGH mutually exclusive outputs

Output capability: standard

\ICC category: MSI