Samsung KS0668 Datasheet
6 BIT 384 CHANNEL TFT-LCD SOURCE DRIVER
KS0668
written permission of LCD Driver IC Team.
November. 1999.
Prepared by Dae-Young, Ahn
Mail: jesus9@samsung.co.kr
Ver. 0.1
Contents in this document are subject to change without notice. No part of this document may be reproduced
or transmitted in any form or by any means, electronic or mechanical, for any purpose, without the express
KS0668 6 BIT 384 CHANNEL TFT-LCD SOURCE DRIVER
KS0668 Specification Revision History
Version Content Date
0.0 Original Aug.1999
0.1
The contents of page 16, 17 and 18 have been modified
Nov.1999
2
6 BIT 384 CHANNEL TFT-LCD SOURCE DRIVER KS0668
CONTENTS
INTRODUCTION.................................................................................................................................................4
FEATURES......................................................................................................................................................... 4
BLOCK DIAGRAM..............................................................................................................................................5
PIN ASSIGNMENTS............................................................................................................................................6
PIN DESCRIPTIONS...........................................................................................................................................7
OPERATION DESCRIPTION.............................................................................................................................. 8
DISPLAY DATA TRANSFER............................................................................................................................ 8
EXTENSION OF OUTPUT...............................................................................................................................8
RELATIONSHIP BETWEEN INPUT DATA VALUE AND OUTPUT VOLTAGE.................................................8
ABSOLUTE MAXIMUM RATINGS....................................................................................................................15
RECOMMENDED OPERATION CONDITIONS.................................................................................................15
DC CHARACTERISTICS................................................................................................................................... 16
AC CHARACTERISTICS ................................................................................................................................... 17
WAVEFORMS...................................................................................................................................................18
RELATIONSHIPS BETWEEN CLK1, START PULSE (DIO1, DIO2) AND BLANKING PERIOD ....................... 19
3
KS0668 6 BIT 384 CHANNEL TFT-LCD SOURCE DRIVER
INTRODUCTION
The KS0668 is a 384 channel output, TFT-LCD source driver for an 64 gray-scale LCD panel. Data input is based
on digital input consisting of 6 bits by 6 dots, which can realize a full-color display of 260,000 colors by output of
64 values gamma-corrected.
This device has an internal D/A (digital-to-analog) converter for each output and 10 (5-by-2) reference voltages.
Because the output dynamic range is as large as 4.8 - 7.8 Vp-p, it is unnecessary to operate level inversion of the
LCD's common electrode. Besides, to be able to deal with dot-line inversion when mounted on a single-side,
output gray-scale voltages with different polarity can be output to the odd number output pins and the even output
pins.
KS0668 can be adopted to larger panel, and SHL (shift direction selection) pin makes the use of the LCD panel
connection conveniently. Maximum operation clock frequency is 55 MHz at 2.7 V logic operation, single edge
and it can be applied to the TFT-LCD panel of XGA to SXGA standard.
FEATURES
• TFT active matrix LCD source driver LSI
• 64 gray-scale is possible through 10 (5-by-2) reference voltages and D/A converter
• Both dot inversion display and N-line inversion display are possible
• CMOS level input
• Compatible with gamma-correction
• Input data inversion function (DATPOL)
• Logic supply voltage: 2.7 - 3.6 V
• LCD driver supply voltage: 5.0 - 8.0 V
• Output dynamic range: 4.8 - 7.8 Vp-p
• Maximum operating frequency: fMAX = 55 MHz (internal data transmission rate at 2.7 V operation)
• Output: 384 outputs
• TCP
4
6 BIT 384 CHANNEL TFT-LCD SOURCE DRIVER KS0668
Y001
BLOCK DIAGRAM
TEST
POL
VGMA1 VGMA10
CLK1
BIAS
10
Y384
6 6 6 6 6 6
6 6 6 6 6 6
Y383
Y382
Output Buffer
D/A Converter
Data Latch
Y003
Y002
DATPOL
D00 - D05
D10 - D15
D20 - D25
D30 - D35
D40 - D45
D50 - D55
CLK2
Data Register
6
6
6
6
6
6
36
Data Control
DIO2
64bit Shift Register
SHL
DIO1
Figure 1. KS0668 Block Diagram
5
KS0668 6 BIT 384 CHANNEL TFT-LCD SOURCE DRIVER
PIN ASSIGNMENTS
Y001
Y002
Y003
Y004
Y381
Y382
Y383
Y384
KS0668
(Top View)
DIO1
D00
D01
D02
D03
D04
D05
D10
D11
D12
D13
D14
D15
D20
D21
D22
D23
D24
D25
TEST
DATPOL
POL
CLK1
CLK2
VSS1
VGMA1
VGMA2
VGMA3
VGMA4
VGMA5
VSS2
VDD2
VGMA6
VGMA7
VGMA8
VGMA9
VGMA10
SHL
VDD1
D30
D31
D32
D33
D34
D35
D40
D41
D42
D43
D44
D45
D50
D51
D52
D53
D54
D55
DIO2
Figure 2. KS0668 Pin Assignments
6
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