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PDF UPD16641 Data sheet ( Hoja de datos )
| Número de pieza | UPD16641 | |
| Descripción | SOURCE DRIVER FOR 240-OUTPUT TFT-LCD 64 GRAY SCALES | |
| Fabricantes | NEC | |
| Logotipo |  |
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD16641
SOURCE DRIVER FOR 240-OUTPUT TFT-LCD (64 GRAY SCALES)
DESCRIPTION
The µPD16641 is a source driver for TFT-LCD 64 gray scale displays. Its logic circuit operates at 3.3 V and the
driver circuit operates at 3.3 or 5.0 V (selectable). The input data is digital data at 6 bits × 3 dots, and 260,000 colors
can be displayed in 64-value outputs γ-corrected by the internal D/A converter and 11 external power supplies.
Because the clock frequency is 33 MHzMIN, the µPD16641 can be used in TFT-LCD panels conforming to the VGA
standards.
FEATURES
• Precharge-less output buffer
• 64-value output by 11 external power supplies and internal D/A converter
• Level of γ-corrected power supply can be inverted
• Output voltage range: 2.8 VP-PMAX. (at supply voltage VDD2 of driver circuit = 3.0 V)
4.3 VP-PMAX. (at supply voltage VDD2 of driver circuit = 4.5 V)
• CMOS level input
• 6 bit (gray scale data) × 3 dot input
• High-speed data transfer: fmax. = 33 MHzMIN. (internal data transfer rate at supply voltage VDD1 of logic circuit = 3.0 V)
• 240 outputs
• Supply voltage of driver circuit selectable (Vsel = H: 3.3 V, Vsel = L: 5.0 V)
• Slim TCP
ORDERING INFORMATION
Part No.
µPD16641N-×××
Package
TCP (TAB package)
The TCP is custom-made. For details, consult NEC
Document No. S10565EJ1V0DS00 (1st edition)
Date Published May 1998 N CP(K)
Printed in Japan
© 1998
1 page  
µPD16641
4. RELATION BETWEEN INPUT DATA AND OUTPUT VOLTAGE VALUE
The 11 major points on the γ characteristic curve of the LCD panel are arbitrarily set by external power supplies V0
through V10. If the display data is 00H or 3FH, gray scale voltage V0 or V10 is output. If the display data is in the range
01H to 3EH, the high-order 3 bits select an external powers pair Vn+1, Vn. The low-order 3 bits evenly divide the range
of Vn+1 to Vn into eight segments by means of D/A conversion (however, the ranges from V9 to V8 and from V2 to V1
are divided into seven segments) to output a 64 gray scale voltage.
DX5 (MSB)
DX4
DX3
DX2
DX1 DX0 (LSB)
High-order 3 bits: γ-corrected power selected
Low-order 3 bits: 3bit D/A
(Vn+1, Vn)
(range Vn to Vn+1 is divided into 7 or 8 segments)
DX5 DX4 DX3
000
001
010
011
100
101
110
111
Vn+1 to Vn
V1 to V2
V2 to V3
V3 to V4
V4 to V5
V5 to V6
V6 to V7
V7 to V8
V8 to V9
VDD2
V0
V1
V2
V3
V4
V5
V6
V7
V8
V9
Vn
1
2
3
4
5
6
7
8 Vn+1
000 001 010 011 100 101 110 111
DX2 to DX0
gray scale supply specified
by 00H
7 segments
8 segments
8 segments
8 segments
8 segments
8 segments
8 segments
7 segments
VSS2 V10
gray scale supply specified
0 7 F 17 1F 27 2F 37 3F by 3FH
Input data (HEX)
5
5 Page 
µPD16641
Electrical Characteristics (TA = –10 to +75°C, VDD1 = 3.0 to 3.6 V, VDD2 = 3.0 to 3.6 V or 4.5 to 5.5 V, VSS1 = VSS2 = 0 V)
Parameter
Driver output current
(VDD2 = 3.3 V)
Driver output current
(VDD2 = 5.0 V)
Output voltage deviation
Symbol
IVOH1
IVOL1
IVOH2
IVOL2
∆VO
Output voltage range
Dynamic logic current consumption
Dynamic driver current consumption
Dynamic driver current consumption
VO
IDD1
IDD21
IDD22
Condition
STB = 3.3 V
VOUT = 2.2 V, VX = 3.2 V
VDD1 = VDD2 = 3.3 V
STB = 3.3 V
VOUT = 1.1 V, VX = 0.1 V
VDD1 = VDD2 = 3.3 V
STB = 5.0 V
VOUT = 3.9 V, VX = 4.9 V
VDD1 = 3.3 V, VDD2 = 5.0 V
STB = 5.0 V
VOUT = 1.1 V, VX = 0.1 V
VDD1 = 3.3 V, VDD2 = 5.0 V
VDD1 = 3.3 V, VDD2 = 3.3 V
VOUT = 1.65
VDD1 = 3.3 V, VDD2 = 5.0 V
VOUT = 2.50 V
Input data: 00H to 3FH
No loadNote
No load, VDD2 = 3.3 V ± 0.3 VNote
No load, VDD2 = 5.0 V ± 0.5 VNote
MIN.
TYP.
–0.3
MAX.
–0.075
0.075
0.25
–0.3 –0.1
0.1 0.25
±20 ±25
±20 ±25
VSS2 + 0.1
VDD2 – 0.1
2.0
5.0
6.5
Unit
mA
mA
mA
mA
mV
mV
V
mA
mA
mA
Note The STB cycle is specified at 31 µs and fCLK = 16 MHz. Input data: 1010… (checkerboard pattern)
Refers to current consumption per driver when cascades are connected under the assumption of VGA
single-sided mounting (8 units).
11
11 Page | ||
| Páginas | Total 20 Páginas | |
| PDF Descargar | [ Datasheet UPD16641.PDF ] | |
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