BU97550KV-M_15 Datasheet, PDF (1/73 Pages) Rohm – Multi-function LCD Segment Drivers

Datasheet
LCD Segment Drivers
Multi-function LCD Segment Drivers
BU97550KV-M
MAX 528 Segment(66SEGx8COM)
General Description
The BU97550KV-M is 1/8, 1/7, 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 BU97550KV-M can drive up to 528
LCD Segments directly. The BU97550KV-M 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 wiring
Features
 AEC-Q100 Qualified ^(Note)
 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
(Note) Grade 3
Key Specifications
■ Supply Voltage Range:
+2.7V to +6.0V
■ 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
Package
W (Typ.) x D (Typ.) x H (Max.)
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
SCE
SCL
SDI
SDO
S1/P1/G1
S9/P9/G9
S10
LCD Panel
(Up to 528 Segments)
(Note2) Insert capacitors
between VDD and VSS C≥0.1uF
S52
S68
S69
OSC_IN/S70
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
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© 2015 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
○This product is not designed protection against radioactive rays.
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TSZ02201-0P4P0D300980-1-2
09.Jul.2015 Rev.002