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BU91R63CH-M3BW Datasheet

Low Duty LCD Segment Driver

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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)
30
COM
43
SEG
0
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 structureSilicon monolithic integrated circuit
.www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product has no designed protection against radioactive rays
1/33
TSZ02201-0P4P0D301380-1-2
10 Feb. 2016 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BU91R63CH-M3BW Datasheet

Low Duty LCD Segment Driver

No Preview Available !

BU91R63CH-M3BW Max 176 segments (SEG44 x COM4)
Block Diagram / Pin Description
---
VLCD
LCD Voltage Generator
Common
Driver
Segm ent
Driver
V0
LCD
BIAS
Selector
Common
Counter
Blink
Tim ing
Generator
DDRAM
OSCIN
VDD
VSS
Oscillator
Power On
Reset
Command
Register
Command
Data Decorder
Serial Interface
IF Filter
Figure 2. Block Diagram
Table 1. Pin Description
Terminal name
I/O
Function
Handling
when unused
POR enable setting
T0 I VDD: POR disable (Note)
VSS: POR enable
T1
I
Test input (ROHM use only)
Must be connected to VSS.
T2
I
Test input (ROHM use only)
Must be connected to VSS.
VSS
VSS
VSS
DUMMY
- Open
OPEN
DUMMY1, 2
- Can be used for COG resistance measurement.
OPEN
OSCIN
SDA
SCL
External clock input
I External clock and Internal clock can be selected by command
Must be connected to VSS when using internal oscillator
I/O Serial data in-out terminal
I Serial clock terminal
VSS
-
-
VSS
I GND
-
VDD
I Power supply for logic
-
VLCD
I Power supply for LCD driving circuit
-
SEG0 to 43
O SEGMENT output for LCD driving
OPEN
COM0 to 3
O COMMON output for LCD driving
OPEN
(Note) This function is guaranteed by design, not tested in production process. Software Reset is necessary to initialize IC in case of T0=VDD.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/33
TSZ02201-0P4P0D301380-1-2
10 Feb. 2016 Rev.001


Part Number BU91R63CH-M3BW
Description Low Duty LCD Segment Driver
Maker ROHM
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BU91R63CH-M3BW Datasheet PDF






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