74HC/HCT147

General description

The 74HC/HCT147 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 74HC/HCT147 9-input priority encoders accept data from nine active LOW inputs (A₀ to A₈) and provide a binary representation on the four active LOW outputs (Y₀ to Y₃). A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with input line A₈ having the highest priority.

The devices provide the 10-line to 4-line priority encoding function by use of the implied decimal 'zero'. The 'zero' is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH.

Features

• Encodes 10-line decimal to 4-line BCD
• Useful for 10-position switch encoding
• Used in code converters and generators
• Output capability: standard
• I_CC category: MSI

Products/packages

Pricing/ordering/availability

Applications

• Driving LED displays
• Driving incandescent displays
• Driving fluorescent displays
• Driving LCD displays
• Driving gas discharge displays

Design support

Support Documents

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

75013486; Philips Logic Competitive Cross Reference Guide (2004-09-14)

75015399; Power management in notebook omputers (2005-12-01)

Parametrics/similar products

Similar products
74HC/HCT147 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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