LCD Segment Drivers
Multi-function LCD Segment Drivers
MAX 445 Segment(89segx5COM)
The BU97530KVT is 1/5, 1/4, 1/3 or 1/1 duty
general-purpose LCD driver that can be used for
frequency display in electronic tuners under the
control of a microcontroller. The BU97530KVT can
drive up to 445 LCD Segments directly. The
BU97530KVT can also control up to 9
general-purpose output ports.
These products also incorporate a key scan circuit
that accepts input from up to 30 keys to reduce
printed circuit board wring.
Key input function for up to 30 keys (A key scan is
performed only when a key is pressed.)
Either 1/5, 1/4, 1/3 or 1/1 duty (static) can be
selected with the serial control data.
1/5 duty drive: Up to 445 segments can be driven
1/4 duty drive: Up to 360 segments can be driven
1/3 duty drive: Up to 270 segments can be driven
1/1 duty drive: Up to 90 segments can be driven
Serial data control of frame frequency for common
and segment output waveforms.
Serial data control of switching between the
segment output port , PWM output port and
general-purpose output port functions.(Max 9
Built-in OSC circuit
Integrated Power-on Reset circuit
No external component
Low power consumption design
Supports Line and Frame Inversion
Supply Voltage Range:
+2.7V to +6.0V
Operating Temperature Range:
-40°C to +85°C
1/2, 1/3 selectable
3wire serial interface
16.00mm x 16.00mm x 1.20mm
Car audio, Home electrical appliance,
Meter equipment etc.
Typical Application Circuit
(P1/G1) (General purpose/PWM ports)
(P9/G9) (For use control of backlight)
(Up to 445
(Note1) Insert capacitors between VDD and VSS C≥0.1uF
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
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○This product is not designed protection against radioactive rays