74HC/HCT139

General description

The 74HC/HCT139 are high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A.

The 74HC/HCT139 are high-speed, dual 2-to-4 line decoder/multiplexers. This device has two independent decoders, each accepting two binary weighted inputs (nA₀ and nA₁) and providing four mutually exclusive active LOW outputs (nY₀ to nY₃). Each decoder has an active LOW enable input (nE).

When nE is HIGH, every output is forced HIGH. The enable can be used as the data input for a 1-to-4 demultiplexer application.

The '139' is identical to the HEF4556 of the HE4000B family.

Features

• Demultiplexing capability
• Two independent 2-to-4 decoders
• Multifunction capability
• Active LOW mutually exclusive outputs
• Output capability: standard
• I_CC category: MSI

Products/packages

Pricing/ordering/availability

Applications

• Precision 10-bit D/A converters
• 10-bit analog-to-digital converters
• Programmable power supplies
• Test equipment
• Measurement instruments

Block diagrams/pinning

Design support

Support Documents

HCT_USER_GUIDE; HC/T User Guide (1997-11-01)

Parametrics/similar products

Similar products
74HC/HCT139 links to the similar products page containing an overview of products that are similar in function or related to the type number(s) as listed on this page. The similar products page includes products from the same catalog tree(s), relevant selection guides and products from the same functional category.

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