1628 是一种带键盘扫描接口的LED(发光二极管显示器)驱动控制**电路, 内部集成有MCU 数字接口、数据锁存器、LED 高压驱动、键盘扫描等电路。本产品性能优良,质量可靠。主要应用于VCR、VCD、DVD 及家庭影院等产品的显示屏驱动。采用SOP28的封装形式。 工作电压范围:3V~5V 多种显示模式(10 段×7 位 ~ 13 段×4 位) 键扫描(10×2) 灰度调节电路(占空比 8级可调) 串行接口(CLK,STB,DIO) 振荡方式:内置RC 振荡(450KHz+5%) 1628(SOP 28) / TT1668(SOP 24) is an LED Controller driver with key scan function . Ten segment output lines, four grid output lines, Three segment/grid output lines , display memory, pulse width control circuit , key scan circuit , 3 wire interface circuit are all incorporated into a single chip to build a highly reliable peripheral device for a single chip microcomputer. Features ? Multiple Display Modes (10 segment X 7 Grid to 13 segment X 4 Grid) ? Key Scanning (10 x 2 ) ? 8 step Dimming adjustment ? Build-in RC oscillator ? Serial interface for clock, data Input/ output, strobe pins ? SOP28 package (TT1628) / SOP24 package(TT1668) ? CMOS technology ? Low power consumptio