PT16556 LCD Driver IC DESCRIPTION PT16556 is a General Purpose LCD Driver IC utilizing CMOS Technology specially designed for electronic tuners controlled by microcontroller. It can drive up to a maximum of 128 segment outputs and can control up to 4 general purpose output ports. Pin assignments and application circuit are optimized for easy PCB layout and cost saving advantages. APPLICATION Frequency Display for Electronic Tuners FEATURES CMOS Technology Up to 128 LCD Segments(4 Com X 32 Seg) with 18 key scan Up to 99 LCD Segments(3 Com X 33 Seg) with 18 key scan Up to 4 General Purpose Output Ports 1/4 ;1/3 Duty – 1/2 Bias or 1/4; 1/3 Duty – 1/3 Bias Drive Technique Power Saving Mode provided Power Supply Voltage: 2.7V ~ 6V CMOS/TTL compatible logic input pins Available in 44 pins, LQFP BLOCK DIAGRAM Tel: 886-66296288‧Fax: 886-29174598‧ http://www.princeton.com.tw‧2F, No. 233-1, Baociao Rd., Sindian Dist., New Taipei City 23145, Taiwan PT16556 APPLICATION CIRCUIT Notes: 1. C 0.1µF 2. 10KΩ R 1KΩ V1.1 2 December 2013 PT16556 ORDER INFORMATION Valid Part Number PT16556-LQ Package Type 44 Pins, LQFP Top Code PT16556-LQ PIN CONFIGURATION PIN DESCRIPTION Pin Name SG1/P1 ~ SG4/P4 SG5 ~ SG26 SG27/KS1 ~ SG32/KS6 KI1 ~ KI3 VSS VDD CE CLK DI/O COM4/SG33 COM1 ~ COM3 I/O O O O I I I I/O O O Description Segment Driver Output/General Purpose Output Ports Segment Driver Output Pins Segment Driver Output/Key Scan Output Ports Key Scan Input Pins Ground Power Supply Chip Enable Pin Clock Input Pin Data Input /Output Pin Segment Driver Output/ Common Output Ports Common Driver Output Pins Pin No. 1~4 5 ~ 26 27 ~ 32 33 ~ 35 36 37 38 39 40 41 44 ~ 42 Note: It must be noted that when the display is forcibly turned OFF, the serial data transfers can still be performed. V1.1 3 December 2013 PT16556 IMPORTANT NOTICE Princeton Technology Corporation (PTC) reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and to discontinue any product without notice at any time. PTC cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a PTC product. No circuit patent licenses are implied. Princeton Technology Corp. 2F, 233-1, Baociao Road, Sindian Dist, New Taipei City 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.1 26 December 2013