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7447 - BCD to 7-Segment Decoders/Drivers

General Description

The DM7446A and DM7447A feature active-LOW outputs designed for driving common-anode LEDs or incandescent indicators directly.

All of the circuits have full ripple-blanking input/output controls and a lamp test input.

Segment identification and resultant displays are shown on a following page.

Key Features

  • s All circuit types feature lamp intensity modulation capability s Open-collector outputs drive indicators directly s Lamp-test provision s Leading/trailing zero suppression Ordering Code: Order Number DM7446AN DM7447AN Package Number Package.

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Other Datasheets by Fairchild (now onsemi)

Part Number Description
7447A BCD to 7-Segment Decoders/Drivers
7442 BCD to Decimal Decoder
7445 BCD to Decimal Decoders/Drivers
7446A BCD to 7-Segment Decoders/Drivers

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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DM7446A, DM7447A BCD to 7-Segment Decoders/Drivers September 1986 Revised July 2001 DM7446A, DM7447A BCD to 7-Segment Decoders/Drivers General Description The DM7446A and DM7447A feature active-LOW outputs designed for driving common-anode LEDs or incandescent indicators directly. All of the circuits have full ripple-blanking input/output controls and a lamp test input. Segment identification and resultant displays are shown on a following page. Display patterns for BCD input counts above nine are unique symbols to authenticate input conditions. All of the circuits incorporate automatic leading and/or trailing-edge, zero-blanking control (RBI and RBO). Lamp test (LT) of these devices may be performed at any time when the BI/RBO node is at a HIGH logic level.