BU97550KV-M Datasheet, PDF (1/72 Pages) Rohm – AEC-Q100 Qualified

LCD Segment Drivers
Multi-function Segment Drivers
BU97550KV-M
MAX 528 Segment(66segx8COM)
General Description
Key Specifications
The BU97550KV-M is 1/8, 1/7, 1/5, 1/4, 1/3, or 1/1
„ Supply Voltage Range:
+2.7V to +6.0V
duty general-purpose LCD driver that can be used
for frequency display in electronic tuners under the
control of a microcontroller. The BU97550KV-M can
drive up to 528 LCD Segments directly. The
BU97550KV-M can also control up to 9
general-purpose output ports.
„ Operating Temperature Range:
-40°C to +85°C
„ Max Segments:
528 Segments
„ Display Duty:
1/1,1/3,1/4,1/5,1/7,1/8 Selectable
„ Bias:
1/1,1/2,1/3,1/4 Selectable
„ Interface:
3Wire Serial Interface
These products also incorporate a key scan circuit
that accepts input from up to 30 keys to reduce _Packages
printed circuit board wiring
VQFP80
W(Typ) × D(Typ) × H(Max)
Features
„ AEC-Q100 Qualified ^(Note1)
„ Key input function for up to 30 keys (A key scan
is performed only when a key is pressed.)
„ Either 1/8, 1/7, 1/5, 1/4, 1/3 or 1/1 duty (static)
can be selected with the serial control data.
1/8 duty drive: Up to 528 segments can be driven
1/7 duty drive: Up to 469 segments can be driven
1/5 duty drive: Up to 345 segments can be driven
1/4 duty drive: Up to 280 segments can be driven
1/3 duty drive: Up to 210 segments can be driven
1/1 duty drive: Up to 70 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
ports)
„ Built-in OSC circuit
„ Integrated Power-on Reset circuit
„ No external component
„ Low power consumption design
„ Supports Line and Frame Inversion
(Note1) Grade 3
VQFP80
14.00mm x 14.00mm x 1.60mm
Applications
„ Car audio, Home electrical appliance,
Meter equipment etc.
Typical Application Circuit
Key Matrix
+5V
(Note2)
KS1 / S53
KS6 / S58
VDD
KI1 / S59
KI5 / S63
COM1
COM2
COM3
COM4
COM5/S67
COM6/S66
COM7/S65
COM8/S64
P1/G1
P9/G9
(General Purpose/PWM Ports)
(For control of backlight)
From Control
To Control
(Note2) Insert capacitors
between VDD and VSS C≥0.1uF
SCE
SCL
SDI
SDO
S1/P1/G1
S9/P9/G9
S10
LCD Panel
(Up to 528 Segments)
S52
S68
S69
OSC IN/S70
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays
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30.Mar.2015 Rev.001