BL55028

BL55028 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 LCD Driver for 76 Display Units BL55028 1 General Description The BL55028 is a general LCD driver IC for 76 units LCD panel. It features a wide operating supply voltage range, incorporates simple communication interface with microcomputer and is suitable for multiple application. 2 Features Advanced low power CMOS Technology Selection of 1/2 or 1/3 bias, selection of 1/2 or 1/3 or 1/4 duty. Operation voltage: 2.5~5.5V Serial data interface 76(19x4) Display Units Low power dissipation design: Power saving mode: Idd=14uA at 5V and Idd=9uA at 3.3V; On-chip RC oscillator VLCD for adjusting LCD operating voltage Excellent EMC immunity Compatible with general microcomputer SOP28 package 3 Pin Assignment S18 SDA SCL VDD VSS VLCD BP0 BP2 BP1 BP3 S0 S1 S2 S3 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 S17 27 S16 26 S15 25 S14 24 S13 23 S12 22 S11 21 S10 20 S9 19 S8 18 S7 17 S6 16 S5 15 S4 Fig 1 1 BL55028 4 Pin Description Pin No. 2 3 4 5 6 7-10 11-28、1 Shanghai Belling Corp., Ltd zip: 200233 Tel: 86-021-64850700 Fax: 86-021-64855865 Pin name SDA SCI Vdd Vss Vlcd Com0、Com2、Com1、Com3 S0——S18 Tab.1 Function Serial data input/output Serial clock input Supply voltage ground LCD supply voltage Common terminal driving output Segment terminal driving output 5 Function Description 1.function circuit The BL550028 has all function circuits that can directly drive any static or multiplexed LCD contain...