Princeton Technology Corp. 1/3 Duty General Purpose LCD Driver IC Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw PT6523 DESCRIPTION PT6523 is an LCD Driver IC which can drive up to 156 segments. It can be used for frequency display in microprocessor-controlled radio receiver and in other display applications. PT6523 supports both 1/2 bias, 1/3 duty and 1/3 duty, 1/3 bias. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. FEATURES • • • • • • • • Up to 156 Segments Outputs 1/3 Duty - 1/2 Bias and 1/3 Duty - 1/3 Bias Drive Techniques Power Saving Mode and all Segments OFF Function Direct Display of Display Data without using a Decoder RC Oscillation Circuit Power Supply Voltage: 4.5 to 6V LCD Drive Bias Voltage can be provided internally or externally Available in 64 pins, QFP or LQFP Package APPLICATIONS • • • • • • Electronic Dictionary / Translator P.O.S. Caller ID Pager Mini Compo Electronic Equipment with LCD Display PT6523 v1.1 Page 1 Updated July 2001 Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. 1/3 Duty General Purpose LCD Driver IC PT6523 SG48 SG47 SG46 SG45 SG44 SG43 SG42 SG41 SG40 SG39 SG38 SG37 SG36 SG35 SG34 SG33 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 PIN CONFIGURATION 28 SG28 COM2 54 27 SG27 COM3 55 26 SG26 VDD 56 25 SG25 INH 57 24 SG24 VDD1 58 23 SG23 VDD2 59 22 SG22 VSS 60 21 SG21 OSC 61 20 SG20 CE 62 19 SG19 CLK 63 18 SG18 DI 64 17 SG17 PT6523 v1.1 Page 2 SG16 53 SG15 COM1 SG14 SG29 SG13 29 SG12 52 SG11 SG52 SG10 SG30 SG9 30 SG8 SG31 51 SG7 31 SG51 SG6 50 SG5 SG50 SG4 SG32 SG3 32 SG2 49 SG1 SG49 Updated July 2001 Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. 1/3 Duty General Purpose LCD Driver IC PT6523 APPLICATION CIRCUIT 1 1/3 Bias (For Small Display Panel) 47kΩ 1000pF OSC VDD VDD COM1 COM2 COM3 R1 INH 20pF 0.1uF VDD1 SG1 : : : : : SG52 OPEN VDD2 CE FROM THE MICROCONTROLLER LCD PANEL VSS CLK (UP TO 156 SEGMENTS) DI Note: 1. 39kΩ>R1>10kΩ 1/3 Bias (for Normal Size Display Panels) 47kΩ 1000pF OSC VDD VDD R1 INH 0.1uF 20pF COM1 COM2 COM3 LCD PANEL VSS VDD1 C C VDD2 CE FROM THE MICROCONTROLLER CLK SG1 : : : : : SG52 (UP TO 156 SEGMENTS) DI Notes: 1. 39kΩ>R1>10kΩ 2. C>0.047uF PT6523 v1.1 Page 3 Updated July 2001 Tel : 886-2-29162151 Fax: 886-2-29174598 URL: http://www.princeton.com.tw Princeton Technology Corp. 1/3 Duty General Purpose LCD Driver IC PT6523 APPLICATION CIRCUIT 3 1/3 Bias (For Large Panels) 47kΩ 1000pF OSC VDD VDD R R1 INH 20pF 0.1uF VDD1 VDD2 C R CE FROM THE MICROCONTROLLER LCD PANEL VSS R C COM1 COM2 COM3 CLK SG1 : : : : : SG52 (UP TO 156 SEGMENTS) DI Notes: 1. 39kΩ>R1>10kΩ 2. C>0.047uF 3. 10kΩ>R>1kΩ PT6523 v1.1 Page 4 Updated July 2001