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| Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw LCD Driver IC PT6554 DESCRIPTION PT6554 is a high performance Liquid Crystal Display (LCD) Driver IC utilizing CMOS Technology specially designed with Key Input Function. It can drive up to a maximum of 164 segments and control up to 4 general purpose output ports. It includes a Key Scan Circuit that can support up to 30 key inputs and provides On-Chip Voltage Detection Type Reset Circuit which prevents incorrect display. Display Data can be directly displayed without using any decoder. PT6554 also supports both 1/4 duty-1/2 bias and 1/4 duty-1/3 bias drive techniques. Pin assignments and application circuit are optimized for easy PCB Layout and cost saving advantages. FEATURES * * * * * * * * * CMOS Technology Up to 164 Segment Drivers (4 Com x 41 Seg) Up to 4 General Purpose Output Ports Key Input Function 1/4 Duty-1/2 Bias and 1/4 Duty-1/3 Bias Drive Techniques Sleep Mode & All Segment OFF Function On-Chip Voltage Detection Type Reset Circuit RC Oscillation Circuit Available in 64 pins, QFP or LQFP Package APPLICATION * Electronic Equipment with LCD Display PT6554 v1.1 -1- April, 2004 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw LCD Driver IC PT6554 PIN CONFIGURATION PT6554 v1.1 -2- April, 2004 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw LCD Driver IC PT6554 APPLICATION CIRCUIT 1 Notes: 1. 2. A capacitor must be added to the power line so that both the power supply voltage (VDD) rise time when power is applied and the power supply voltage (VDD) fall time when power drops are at least 1 ms. DO is an open - drain output and requires a pull-high resistor between 1k to 10k. The pull-up resistor value must be appropriate to the capacitor of the external wiring so that the signal wave forms are not degraded. PT6554 v1.1 -3- April, 2004 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw LCD Driver IC PT6554 APPLICATION CIRCUIT 2 Notes: 1. 2. A capacitor must be added to the power line so that both the power supply voltage (VDD) rise time when power is applied and the power supply voltage (VDD) fall time when power drops are at least 1 ms. DO is an open - drain output and requires a pull-high resistor between 1k to 10k. The pull-up resistor value must be appropriate to the capacitor of the external wiring so that the signal wave forms are not degraded. PT6554 v1.1 -4- April, 2004 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw LCD Driver IC PT6554 APPLICATION CIRCUIT 3 Notes: 1. 2. 3. A capacitor must be added to the power line so that both the power supply voltage (VDD) rise time when power is applied and the power supply voltage (VDD) fall time when power drops are at least 1 ms. DO is an open-drain output and requires a pull-high resistor between 1k to 10k. The pull-up resistor value must be appropriate to the capacitor of the external writing so that the signal wave forms are not degraded. R1=R2=R3, the resistance value must be decide by the LCD panel size. -5April, 2004 PT6554 v1.1 Tel: 886-2-66296288 Fax: 886-2-29174598 URL: http://www.princeton.com.tw LCD Driver IC PT6554 ORDER INFORMATION Order Part Number PT6554 PT6554LQ PT6554 (L) PT6554LQ (L) Package Type 64 Pin QFP Package 64 Pin LQFP Package 64 Pin QFP Package 64 Pin LQFP Package Top Code PT6554 PT6554LQ PT6554 PT6554LQ Notes: 1. (L) = Lead Free 2. The Lead Free mark is put in front of the date code. PT6554 v1.1 -6- April, 2004 |
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