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| PT6579 General Purpose LCD Driver IC DESCRIPTION PT6579 is an LCD Driver IC which can drive up to 200 segments. It can be used for frequency display in microprocessor-controlled radio receiver and in other display applications. PT6579 supports both 1/3 duty, and 1/4 duty drive. Pin assignment and application circuit are optimized for easy PCB layout and cost saving advantages. FEATURES * CMOS technology * Up to 153 segments for 1/3 duty and 200 segments for 1/4 duty drive can be displayed * 1/3 Duty - 1/2 Bias and 1/3 Duty - 1/3 Bias drive techniques * 1/4 Duty - 1/2 Bias and 1/4 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: 4.5V to 6V * CMOS/TTL compatible logic input pins * LCD drive bias voltage can be provided internally or externally * On-Chip voltage detection type reset circuit * Programmable PWM signal output pins * Available in 64 pins LQFP APPLICATION * Electronic equipment with LCD display BLOCK DIAGRAM Tel: 886-66296288Fax: 886-29174598 http://www.princeton.com.tw2F, 233-1, Baociao Road, Sindian, Taipei 23145, Taiwan PT6579 APPLICATION CIRCUIT 1 1/2 BIAS (FOR NORMAL PANEL) Notes: 1. 10K R 1K 2. *=Please select the suitable transistor 1/3 BIAS (FOR NORMAL PANELS) Notes: 1. 10K R 1K 2. *=Please select the suitable transistor V1.1 2 September, 2009 PT6579 APPLICATION CIRCUIT 2 1/2 BIAS (FOR NORMAL PANEL) Notes: 1. 10K R 1K 2. *=Please select the suitable transistor 1/3 BIAS (FOR NORMAL PANELS) Notes: 1. 10K R 1K 2. *=Please select the suitable transistor V1.1 3 September, 2009 PT6579 ORDER INFORMATION Valid Part Number PT6579-LQ Package Type 64 Pins, LQFP Top Code PT6579-LQ PIN CONFIGURATION V1.1 4 September, 2009 PT6579 PIN DESCRIPTION Pin Name SG1 to SG50 COM4/SG51 COM3 to COM1 VDD VDD1 I/O O O I Active Segment output pins Description Pin No. 1 to 50 Common driver output pins 51 to 54 The COM4/ SG51 pin can be used as a segment output in 1/3 duty Power supply 55 Supply voltage in the range 4.5 to 6.0V Used for the 2/3 Bias Voltage when the Bias Voltage is provided externally. 56 Connect to VDD2 when 1/2 bias is used Used for the 1/3 Bias Voltage when the Bias Voltage is provided externally. 57 Connect to VDD1 when 1/2 Bias is used Ground Chip enable pin Synchronization clock pin H Transfer data input pin PWM output pins 58 59 60 61 62 to 64 VDD2 VSS CE CLK DI P1 to P3 I I I I O H V1.1 5 September, 2009 PT6579 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, Taipei 23145, Taiwan Tel: 886-2-66296288 Fax: 886-2-29174598 http://www.princeton.com.tw V1.1 6 September, 2009 |
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