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BU91799KV-M Datasheet

Low Duty LCD Segment Driver

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Datasheet
Low Duty LCD Segment Driver
for Automotive Application
BU91799KV-M MAX 200 segments (SEG50×COM4)
General Description
BU91799KV-M is a 1/4 duty general-purpose LCD driver
that can be used for automotive applications and can
drive up to 200 LCD Segments.
It can support operating temperature of up to +105°C and
is qualified AEC-Q100 Grade2, as required for
automotive applications.
It has integrated display RAM for reducing CPU load.
Also, it is designed with low power consumption and no
external component needed..
Features
AEC-Q100 Qualified (Note)
Integrated RAM for Display Data (DDRAM):
50 x 4 bit (Max 200 Segment)
LCD Drive Output :
4 Common Output, Max 50 Segment output
Integrated Buffer AMP for LCD Driving
Integrated Oscillator Circuit
No External Components
Low Power Consumption Design
Independent Power Supply for LCD Driving
Integrated Electrical Volume Register (EVR) function
(Note) Grade 2
Applications
Instrument Clusters
Climate Controls
Car Audios / Radios
Metering
White Goods
Healthcare Products
Battery Operated Applications
etc.
Typical Application Circuit
VLCD
VDD
Key Specifications
Supply Voltage Range:
+2.5V to +6.0V
LCD Drive Power Supply Range: +2.5V to +6.0V
Operating Temperature Range: -40°C to +105°C
Max Segments:
200 Segments
Display Duty:
1/4
Bias:
1/2, 1/3 selectable
Interface:
2wire Serial Interface
Special Characteristics
ESD(HBM):
Latch-up current:
±2000V
±100mA
Package
W (Typ.) x D (Typ.) x H (Max.)
VQFP64
12.00mm x 12.00mm x 1.60mm
C > 0.1uF
Controller
VDD
VDD
VLCD
SDA
SCL
INHb
OSCIN
TEST1
COM0
COM1
COM2
COM3
SEG0
SEG1
Segment
LCD
Insert Capacitors between
VDD / VSS and VLCD / VSS
VSS
SEG49
Internal Clock Mode
Figure 1. Typical Application Circuit
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays.
1/25
TSZ02201-0P4P0D301050-1-2
8. Feb. 2016 Rev.001


Rohm Semiconductor Electronic Components Datasheet

BU91799KV-M Datasheet

Low Duty LCD Segment Driver

No Preview Available !

BU91799KV-M MAX 200 segments (SEG50×COM4)
Block Diagram / Pin Configuration / Pin Description
COM0 …… COM 3 SEG0 SEG 49
VLCD
LCD voltage generator
Common
Driver
Segment
Driver
LCD
BIAS
SELECTOR
Common
Counter
Blink Timing
Generator
DDRAM
INHb
OSCIN
VDD
VSS
VSS
OSCILLATOR
Power On Reset
Command
Register
Command
Data Decoder
Serial Interface
IF FILTER
49
SEG38
SEG39
SEG40
SEG41
SEG42
SEG43
SEG44
SEG45
SEG46
SEG47
SEG48
SEG49
COM0
COM1
COM2
COM3
64
32
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
17
Pin Name
INHb
TEST1
NC
TEST 1
SDA
SCL
Figure 2. Block Diagram
Figure 3. Pin Configuration (TOP VIEW)
Table 1 Pin Description
Pin No.
8
9
I/O Function
Input terminal for display control
I VDD: Display enable
VSS: Display disenable
POR enable setting
I VDD: POR disenable (Note)
VSS: POR enable
Handling
when unused
VDD
VSS
10 - Non connection
OPEN
NC
OSCIN
SDA
5 - Non connection
OPEN
External clock input
4
I External clock and Internal clock modes can be selected by command
VSS
Must be connected to VSS when using internal oscillator.
7 I/O Serial data in-out terminal
-
SCL 6 I Serial clock terminal
-
VSS
3
GND
-
VDD
2
Power supply
-
VLCD
1
Power supply for LCD driving
-
SEG0-49
11-60
O SEGMENT output for LCD driving
OPEN
COM0-3
61-64
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 TEST1=VDD.
www.rohm.com
© 2015 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/25
TSZ02201-0P4P0D301050-1-2
8. Feb. 2016 Rev.001


Part Number BU91799KV-M
Description Low Duty LCD Segment Driver
Maker ROHM
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BU91799KV-M Datasheet PDF






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