BU91R63CH-M3BW Datasheet, PDF (1/37 Pages) Rohm – Low Duty LCD Segment Driver

Datasheet
Low Duty LCD Segment Driver
For Automotive COG Application
BU91R63CH-M3BW Max 176 segments (SEG44 x COM4)
General Description
BU91R63CH-M3BW is a 1/4, 1/3, 1/2 duty or Static COG
type LCD driver that can be used for automotive
applications and can drive up to 176 LCD segments.
It can support operating temperature of up to +105°C and
compliant for AEC-Q100, as required for Automotive
Application. It has integrated display RAM for reducing
CPU load. Also, it is designed with low power consumption
and no external component needed. It includes read
function for display RAM and command register, wherein it
is possible to detect malfunction due to noise. Also a
defective mounting of COG can easily be controlled by
using pins to measure ITO resistance.
Features
 AEC-Q100 compliant ^(Note1)
 1/4, 1/3, 1/2 duty or Static setting selectable
1/4 duty drive: Max 176 segments
1/3 duty drive: Max 132 segments
1/2 duty drive: Max 88 segments
Static drive: Max 44 segments
 Integrated Buffer AMP for LCD driving
 Support Read Register and Display RAM Function
 Support ITO Resistance Measurement
 Integrated Oscillator Circuit
 Integrated EVR function to adjust LCD contrast
 Integrated Power-on Reset Circuit
 No External Components
 Low Power Consumption Design
(Note1) Quality Information:
There is data when LSI was put on a temporary package.
Please use it as reference data.
Typical Application Circuit
[ LCD module ]
Key Specifications
 Supply Voltage Range:
+2.7V to +6.0V
 LCD Drive Power Supply Range:
+2.7V to +6.0V
 Operating Temperature Range:
-40°C to +105°C
 Max Segments:
176 Segments
 Display Duty:
1/4, 1/3, 1/2, Static selectable
 Bias:
1/2, 1/3 selectable
 Interface:
2 wire serial interface
Special Characteristics
 ESD(HBM):
 Latch-up current:
±2000V
±100mA
Applications
 Instrument Clusters
 Climate Controls
 Car Audios / Radios
 Metering
 White Goods
 Healthcare Products
 Battery Operated Applications
etc.
Package
Au BUMP chip
44 x 4 dots
(Top view)
3
0 43
0
COM
SEG
BU91R63CH-M3BW (Bottom view)
VLCD VSS VDD
SCL SDA
VLCD VSS VDD
SCL SDA
MCU
(Note) SDA of BU91R63CH-M3BW needs pull-up
resistor due to open-drain output.
In case that SCL of MCU has open-drain structure,
it also needs pull-up resistor.
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 has no designed protection against radioactive rays
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TSZ02201-0P4P0D301380-1-2
10 Feb. 2016 Rev.001