This document is a data sheet for the 74HC/HCT238 3-to-8 line decoder/demultiplexer. The product features demultiplexing capability, multiple input enable for easy expansion, and is ideal for memory chip select decoding. It has active HIGH mutually exclusive outputs with standard output capability. The IC is compatible with high-speed Si-gate CMOS devices and low power Schottky TTL (LSTTL). It accepts three binary weighted address inputs and provides 8 mutually exclusive active HIGH outputs. The decoder has three enable inputs for parallel expansion. It can be used as an eight output demultiplexer or a 1-of-32 decoder. The document also provides additional specifications and package information.
The Philips 74HC/HCT238 is a high-speed Si-gate CMOS device designed as a 3-to-8 line decoder or demultiplexer. It accepts three binary weighted address inputs and provides eight mutually exclusive active HIGH outputs when enabled.
This integrated circuit features multiple input enable capabilities, including two active LOW inputs (E1, E2) and one active HIGH input (E3), allowing for easy parallel expansion to create larger decoders such as a 1-of-32 configuration. The device is pin-compatible with low power Schottky TTL (LSTTL) and complies with JEDEC standard no. 7A.
| Device Type | 3-to-8 line decoder/demultiplexer |
|---|---|
| Technology | high-speed Si-gate CMOS |
| TTL Compatibility | low power Schottky TTL (LSTTL) |
| Outputs | 8 mutually exclusive active HIGH outputs |
| Icc Category | MSI |
Every output will be LOW unless E1 and E2 are LOW and E3 is HIGH.
The 74HC/HCT238 provides eight mutually exclusive active HIGH outputs.