Technical data sheet for Fairchild DM7446A and DM7447A BCD‑to‑7‑segment decoder/driver ICs.
The DM7446A and DM7447A are BCD‑to‑7‑segment decoder/driver ICs with active‑LOW outputs for driving common‑anode LEDs or incandescent indicators. They include lamp‑test, blanking, and ripple‑blanking functions, and support automatic leading‑zero suppression.
The document provides absolute maximum ratings, recommended operating conditions, electrical and switching characteristics, package information, and a life‑support policy disclaimer. Typical operation is at a 5 V supply with a temperature range of 0 °C to 70 °C.
| Supply Voltage (VCC) – Recommended | 7 V |
|---|---|
| Supply Voltage (VCC) – Typical | 5 V |
| Input Voltage | 5.5 V |
| Operating Temperature Range | 0 °C to +70 °C |
| IOL (per segment) – Low‑Level Output Current | 40 mA |
| Package | 16‑Lead Plastic Dual‑In‑Line Package (PDIP) |
The recommended supply voltage is up to 7 V, with typical operation at 5 V.
The absolute maximum VCC is 7 V, input clamp voltage is –1.5 V, and the devices must not exceed the listed current limits.
The devices operate from 0 °C to +70 °C in free air.
Both ICs are supplied in a 16‑lead plastic dual‑in‑line (PDIP) package.