Part Number: DM7447A
Function: BCD to 7-Segment Decoder / Driver
Package: DIP 16 Pin Type
Manufacturer: National ->Texas Instruments
The DM7446A and 7447A, 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.
1. All circuit types feature lamp intensity modulation capability
2. Open-collector outputs drive indicators directly
3. Lamp-test provision
4. Leading/trailing zero suppression
Other data sheets are available within the file: 5447, 5447A, 7446, 7446A, 7447