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.
Full PDF Text Transcription for DM7447A (Reference)
Note: Below is a high-fidelity text extraction (approx. 800 characters) for
DM7447A. For precise diagrams, tables, and layout, please refer to the original PDF.
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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.
DM7447A Datasheet
