上海贝岭BL55021是一款通用型TN/STN 液晶控制和驱动芯片,BL55021具有128 位显示单元的输出能力,BL55021适用于字符/图形/点阵式液晶屏幕。BL55021 具有较宽的工作电压范围和环境条件,同时还有适合各类微机系统的3 或4 线通讯接口。
· Internal voltage regulator is electrically programmablefor various LCD voltages· Time calibration is electrically programmable(no trimming capacitor required)· LCD voltage adjusts with temperature for good contrast· 4.19 MHz oscillator· 12-hour or 24-hour mode· Operating ambient temperature: -40 to +85 °C· 28-lead plastic SMD (SO28)· 1 Hz set mode.
ADE7751适合用于2线制配电系统。这种产品提供基于输电线电压和电流的瞬时有功功率和平均有功功率。