Datasheet
Low Duty LCD Segment Driver
For Automotive COG Application
BU91R64CH-M Max 320 Segments (80SEG x 4COM)
General Description
Key Specifications
BU91R64CH-M 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 320 LCD Segments.
Supply Voltage Range:
+2.7 V to +6.0 V
LCD Drive Power Supply Range: +2.7 V to +6.0 V
Operating Temperature Range: -40 °C to +105 °C
This driver can be cascaded up-to maximum of 4 drivers
for larger LCD panel application.
It supports VA LCD displays, which has better optical
performance with higher LCD voltage driving and higher
frame frequency driving.
Max Segments:
Display Duty:
Bias:
320 Segments
1/4, 1/3, 1/2, Static Selectable
1/2, 1/3 Selectable
Interface: 2-wire / 3-wire Serial Interface Selectable
This driver includes read function for display data and
command registers, wherein it is possible to detect
malfunction due to noise.
Special Characteristics
ESD(HBM) (Note 2)
:
±2,000 V(Typ)
±100 mA(Typ)
Latch-up Current (Note 2)
:
It can also support other error detections such as
interface checksum detection, glass breaking detection,
logic error detection and SEG / COM toggle detection.
A defective mounting of COG can easily be controlled by
using terminals to measure ITO resistance.
It can support operating temperature of up to +105 °C
and compliant for AEC-Q100, as required for Automotive
Application.
(Note 2) There is data when LSI was put on a temporary package.
Applications
Instrument Clusters
Climate Controls
Car Audios / Radios
Meters
White Goods
Healthcare Products
Battery Operated Applications
etc.
Features
AEC-Q100 Compliant (Note 1)
1/4, 1/3, 1/2 Duty or Static Drive Selectable
1/4 Duty Drive:
1/3 Duty Drive:
1/2 Duty Drive:
Static Drive:
Max 320 Segments
Max 240 Segments
Max 160 Segments
Max 80 Segments
Package
Au Bump Chip
Integrated Buffer AMP for LCD Driving
Integrated Oscillator Circuit and
Software
Programmable Frame Frequency from 66 Hz to
488 Hz
Support External Clock Input
Integrated EVR Function to Adjust LCD Contrast
Integrated Power On Reset Circuit
No External Components
Low Power Consumption Design
Support Display Inhibit Control
Configurable COM Driving Order
Support Max 4 Drivers Cascade Connection
(BU91R64 / R65 / R66CH-M Available)
Support Register and Display Data Read-back
Function
Support LCD Contact Resistance Measurement
Support Error Detection and Status Read Function
Glass Breaking Detection
Interface Checksum
Logic Error Detection
SEG / COM Toggle Detection
(Note 1) Quality Information:
There is data when LSI was put on a temporary package.
Please use it as reference data.
〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays
.
www.rohm.com
TSZ02201-0P3P0D301690-1-2
08.Jan.2020 Rev.003
© 2016 ROHM Co., Ltd. All rights reserved.
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