ra8816 RAIO Technology Inc., ra8816 Datasheet - Page 68

• Manufacturer Part Number: ra8816
• Description: 144x65 Character/graphic Lcd Driver
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.6
RAiO TECHNOLOGY INC.
FPC Pad
The RA8816 power signals (such as VDD, GND, VLCD, V[4..0], C1P, C1M, C2P, C2M) have to keep
the smaller ITO resistance(less than 15 ohm is better) for panel layout. So the wires of layout need to
keep as thick as possible to reduce the ITO resistance. The Figure A-7 is an example for VLCD layout of
panel. Because the RA8816 provide six pads for VLCD, therefore the layout engineer has to connect all
of these pads to FPC. In this case, the VLCD is three times of VDD, so the C3P have to connect to
VLCD and do not forget keep the wire thicker.
The Figure A-8 is a layout example of RA8816 to FPC on COG module. The VDD and GND of RA8816
should as close as possible to FPC. The RA8816 provide six GND pad, user have to connect these six
pads to FPC with a thick wire. For the design of FPC, the related power signals(VDD, GND, VLCD) of
layout need to keep as thick as possible to reduce the wire resistance. And the VDD, GND pad of FPC
keep double width than other signals. For example, if panel resolution is 128x64 then use 4X VDD for
booster and LCD voltage less than 9V is better.
ITO Layout
Chip Pad
ITO Layout
FPC PAD
Chip PAD
Figure A-7：ITO Layout Example - VLCD
Figure A-8：ITO Layout Example
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144x65 Character/Graphic LCD Driver
www.raio.com.tw
RA8816