BU9718KV Datasheet, PDF (1/10 Pages) Rohm – Picture cell driver for STN LCD driver for low voltage power supplies

Standard ICs
Picture cell driver for STN (LCD driver)
for low voltage power supplies
BU9718KV
The BU9718KV is a driver IC designed for the character-type STN liquid crystal panels which are ideal for applica-
tions such as portable devices. The number of display segments includes 32 output segments and 3 common out-
puts, enabling drive of up to 96 segments. A compact 48-pin QFP package with a pitch of 0.5 mm is used, enabling
compact size for the set as a whole.
•^Applications
Portable terminals (POS, ECR, PDA, and others),
held telephone units), and others Low-voltage power
movie projectors, cameras, telephones (cordless hand-
supply sets
•^Features
1) Operates on 3V power supply.
4) Up to 32 segment output pins and 3 common output
2) Low current dissipation. (0.1µA in low power mode
pins are provided, enabling a total display of up to
(actual value))
3) Compact package. (molded section is 7.0 mm^ٗ)
96 segments.
5) 1 / 3 duty display.
6) Either 1 / 2 or 1 / 3 bias can be selected for power sup-
•^{Absolute maximum ratings (Ta = 25°C, VSS = 0V)}
ply for LCD display.
Parameter
Power supply voltage^∗1
Input voltage^∗1
Output voltage^∗1
Symbol
Pin
VDD
VDD
VIN OSC, CS, CK, DI, RES
VOUT
OSC
Limits
Unit
– 0.3 ~ + 7.0
V
– 0.3 ~ VDD + 0.3
V
– 0.3 ~ VDD + 0.3
V
Output current
Power dissipation
ISO
S1 ~ S32
ICO
COM1 ~ COM3
Pd
—
300
µA
3
mA
400 ^∗2
mW
Storage temperature
Tstg
—
– 55 ~ + 125
°C
∗1 Max. voltage that can be applied with a VSS pin
∗2 Reduced by 4.0mW for each increase in Ta 1°C over 25°C.
•^{Recommended operating conditions (Ta = 25°C, VSS = 0V)}
Parameter
Power supply voltage^∗
Symbol
Pin
Min.
Typ.
Max.
Unit
VDD
VDD
2.7
—
3.5
V
Input voltage^∗
VDD1
VDD1
0
2 / 3 VDD
VDD
V
VDD2
VDD2
0
1 / 3 VDD
VDD
V
Oscillation freq., with
external input
fOSC
OSC
—
38
100
kHz
External resistance
R
OSC
—
47
—
kΩ
External capacitance
C
OSC
—
1000
—
pF
Operating temperature
Topr
—
– 40
—
85
°C
∗ Indicates the max. voltage that can be applied with a VSS pin.
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