MC14489BDW
数据手册.pdfIC DRIVER LED/LAMP 5CH 20-SOIC
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.