BL55080 LCD Driver for 280 Display Units BL55080 (SEG35*COM8) General Description The BL55080 is a peripheral device, which interfaces to almost any Liquid Crystal Display (LCD) having low multiplex rates. It generates the drive signals for any static or multiplexed LCD containing up to 8 back planes and up to 35 segments. The BL55080 is compatible with most microprocessors/micro controllers and communicates via a two-line bi-directional IIC -bus. Features LCD drive output: 8 Common output, 35 Segment output 35×8=280-bit RAM for display data storage 2 wire serial interface(IIC-bus) Integrated Oscillator circuit Integrated Buffer AMP for LCD driving, 1/4 Bias, 1/8 Duty No external components required Low power consumption Integrated Electrical volume register(EVR) function 2.5 to 5.5V power supply range 2.5 to 5.5V LCD drive power supply range Packages: TSSOP48, LQFP48, LQFP52 Application Telephone, Power meter, Toy, Portable equipment, Car audio… PIN Description PIN No PIN Name Function TSSOP48 LQFP52 LQFP48 48 20 18 SDA Serial data input 47 19 17 SCL Serial data transfer clock 1 21 19 Vdd Power supply 2 22 20 Vlcd LCD drive power supply 3 23 21 Vss GND SEG0-34 Segment output COM0-7 COM output NC Not connected 4-24 3-11 3-16 33-46 14-18 22-42 24-27 29-52 25-32 2,46-52 1-2 43-48 1,12,13,28 http://www.belling.com.cn - Page 1 of 1 - Ver1.1