BL55080 http://www.belling.com.cn - page 1 of 1 - ver1.1 lcd driver for 280 display units BL55080 (seg35*com8) general description the BL55080 is a peripheral device, which interfac es to almost any liquid crystal display (lcd) having low multiplex rates. i t generates the drive signals for any static or multiplexed lcd containing up to 8 ba ck 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 outpu t 358=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) functio n 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, ca r 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 4-24 33-46 3-11 14-18 24-27 29-52 3-16 22-42 seg0-34 segment output 25-32 2,46-52 1-2 43-48 com0-7 com output 1,12,13,28 nc not connected
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