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PDF BU9706KS Data sheet ( Hoja de datos )
| Número de pieza | BU9706KS | |
| Descripción | LCD segment driver | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de BU9706KS (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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Standard ICs
LCD segment driver
BU9706KS
The BU9706KS is a 40-output LCD segment driver provided with a 40-bit shift register and a 40-bit latch.
As the 40-bit shift register can be divided into two 20-bit sections, it can be used efficiently, based on the number of
segments and the character configuration.
Also, by using a number of BU9706KS drivers, it is possible to configure an LCD segment driver of more than 80
bits.
As the liquid crystal drive voltage can be set externally to any value, it can be used as a driver IC for both static and
dynamic drive in various types of liquid crystal display panels.
•Features
1) 40-bit shift register and 40-bit latch enable serial
input - parallel output.
2) Shift register can be divided into two 20-bit sections.
3) Power supply voltage: 3.5 to 6V.
4) LCD drive voltage: 3 to 6V.
5) Can accommodates duty of 1 / 8 to 1 / 16.
6) Can be used as a driver IC for static drive by setting
the liquid crystal drive voltage externally (V3 = VDD,
V2 = V5 = VSS, connect DF as LCD common).
•Block diagram
VDD 49
V2 43
V3 44
V5 45
DF 51
LOAD 47
DII 53
CP 48
VSS 42
O1 O2 O3
41 40 39
O38 O39 O40
432
LCD Dr
40
40 bit Latch
20
D
20 bit SHIFT REGISTER
CK
20
D
20-bit SHIFT REGISTER
CK
54 55
DO20 DI21
1 DO40
1
1 page  
Standard ICs
BU9706KS
CP
DI1, DI21
DO20, DO40
LOAD
O1 ~ O40
tw (CP)
tw (CP)
0.8VDD 0.8VDD
0.2VDD 0.2VDD
0.8VDD
tsLH
tsHL
0.8VDD
0.2VDD
thLH
thHL
tpLH
tpHL
0.8VDD
0.2VDD
tCL tLC
0.8VDD 0.8VDD
tW (L)
0.2VDD
∗∗
tp (L)
DF
O1 ~ O40
0.8VDD
tp (D)
∗∗
0.2VDD
tp (D)
∗∗
∗ tp (L) and tp (D) are times required before the O1 to O40 output amplitude becomes 80% and 20% respectively.
Fig.2 AC characteristics waveform
•Application example
COM1
COM16
SEG1
SEG40
D
Controller
V1
V2
V3
V4
V5
M
CL1
CL2
LCD panel (16 commons, 120 segments)
O1
DI1
DO20
DI21
O40
BU9706KS
DO40
O1
DI1
DO20
DI21
O40
BU9706KS
DO40
VDD
R
R
R
R
R
Fig.3
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet BU9706KS.PDF ] | |
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