MC14489P

The MC14489 is compatible with the Motorola SPI and National MICRO-WIRE serial data ports.

The purpose of the MC14489 device is to act as a flexible light-emitting-diode driver that can directly interface with individual lamps, 7-segment displays, or various combinations of both. It features data retention, decode and scan circuitry, and can drive a 5-digit display plus decimals, a 4-1/2-digit display plus decimals and sign, or 25 lamps. The device also has on-chip decoder outputs for 7-segment-format numerals, hexadecimal characters, and letters/symbols. It is compatible with Motorola SPI and National MICRO-WIRE serial data ports, and has BitGrabber registers for random access without steering or address bits. The device operates within specific voltage and temperature ranges and allows for control of current sources through a single resistor. It also has clock and enable inputs for proper operation on a serial bus.

The MC14489 can drive a 5-digit display plus decimals, a 4-1/2-digit display plus decimals and sign, or 25 lamps. It also has a special technique that allows driving 5 1/2 digits.