BU9706KS Datasheet, PDF (1/6 Pages) Rohm – LCD segment driver

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