BL55072 LCD Driver for 144 Display Units BL55072 (SEG36*COM4) General Description The BL55072 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 4 back planes and up to 36 segments. The BL55072 is compatible with most microprocessors/micro controllers and communicates via a two-line bi-directional IIC -bus. Features LCD drive output: 4 Common output, 36 Segment output 36×4=144-bit RAM for display data storage 2 wire serial interface(IIC-bus) Integrated Oscillator circuit Integrated Buffer AMP for LCD driving, 1/3 Bias, 1/2 Bias, 1/4 Duty No external components required Low power consumption Integrated POR Versatile blinking modes 2.5 to 5.5V power supply range Packages: TSSOP48 Application Telephone, Power meter, Toy, Portable equipment, Car audio… PIN Description PIN No PIN Name Function 16 SDA Serial data input 15 SCL Serial data transfer clock 11 VDD Power supply 10 VLCD LCD drive power supply 12 VSS GND 1-5 SEG0-35 Segment output 6-9 COM0-3 COM output 13 TEST1 This Pin connect to VSS 14 OSCIO External clock input, when use integrated 18-48 oscillator circuit, this Pin connect to VSS 17 TEST2 POR function enable Pin L: enable POR http://www.belling.com.cn - Page 1 of 1 - Ver1.0