MC14489B中文资料摩托罗拉数据手册PDF规格书

Multy-Character LED Display/Lamp Driver CMOS

The MC144898 is a flexible light-emitting-diode driver which directly in terfaces to individual lamps, 7-segment displays, or various combinations of both. LEOs wired with common cathodes are driven in a multiplexed-by-5 fashion. Communication with an MCUIMPU is established through a synchronous serial port. The MC 144898 features data retention plus decode and scan circuitry, thus relieving processor overhead. A single, current-setting resistor is the only ancillary component required.

.Operating Voltage Range of Drive Circuitry: 4.5 to 5.5 V

.Operating Junction Temperature Range: -40° to 130°C

.Current Sources Controlled by Single Resistor Provide Anode Drive

.Low-Resistance FET Switches Provide Direct Common Cathode Interface

.Low-Power Mode (Extinguishes the LEDs) and Brightness Controlled via Serial Port

.Special Circuitry Minimizes EMI when Display is Driven and Eliminates EMI in Low-Power Mode

.Power-On Reset (POR) Blanks the Display on Power-Up, Independent of Supply Ramp Up Time

.May Be Used with Double-Heterojunction LEDs for Optimum Efficiency

.Chip Complexity: 4300 Elements (FETs, Resistors, Capacitors, etc.)