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Rohm Semiconductor Electronic Components Datasheet

BU97931FV Datasheet

Multifunction LCD Segment Driver

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Datasheet
Multifunction LCD Segment Driver
BU97931FV MAX 112 segments (SEG28×COM4)
Features
Integrated RAM for display data (DDRAM):
28 x 4 bit (Max 112 Segment)
LCD drive output:
4 Common output, Max 28 Segment output
Integrated 1ch LED driver circuit
Segment/GPO (Max 5port) output mode selectable
Support PWM generation from ext. or internal clock
(Resolution: 8bit)
Support standby mode
Integrated Power-on-Reset circuit (POR)
Integrated Oscillator circuit
No external component
Low power consumption design
Independent power supply for LCD driving
Support Blink function
(Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable)
Key Specifications
Supply Voltage Range:
+1.8V to +3.6V
LCD drive power supply Range: +2.7V to +5.5V
Operating Temperature Range: -40°C to +85°C
Max Segments:
112 Segments
Display Duty:
Static, 1/3, 1/4 selectable
Bias:
Static, 1/3
Interface:
3wire serial interface
Package
W (Typ.) x D (Typ.) x H (Max.)
Applications
Telephone
FAX
Portable equipment (POS, ECR, PDA etc.)
DSC
DVC
Car audio
Home electrical appliance
Meter equipment
etc.
SSOP-B40
13.60mm x 7.80mm x 2.00mm
Typical Application Circuit
LED/GPO using case
VLED=5.0V
.0V 3.3V
VLCD
VDD
LED
BU97931FV
*Regarding resistor value
Please detect the value according to
input current value (current MAX = 20mA)
SEG27(GPO0) to
SEG23(GPO4
Other
device
VSS
CSB SD SCL CLKIN
SEG0 toSEG22
COM0 to COM3
LCD
Input signal from controller
CLKIN
External CLK input terminal
In case being unused, connect to VSS or be opened.
Figure 1. Typical application circuit
Product structureSilicon monolithic integrated circuit
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211114001
This product is not designed for protection against radioactive rays.
1/28
TSZ02201-0A0A2D300070-1-2
10.Apr.2015 Rev.004


Rohm Semiconductor Electronic Components Datasheet

BU97931FV Datasheet

Multifunction LCD Segment Driver

No Preview Available !

BU97931FV MAX 112 segments (SEG28×COM4)
Block Diagram / Pin Configuration / Pin Description
VLCD
CLKIN
VDD
VSS
COM0……COM3 SEG0…..22, SEG2327
LED
LCD voltage
Generator
common
driver
Segment Segment
driver driver/GPO
LED
Driver
VSS
OSCILLATOR
LCD
BIAS
SELECTOR
common blink timing
counter generator
GPO
Controller
DDRAM
GPO data latch
PW M
Generator
Power On Reset
Command register
Data Decoder
serial inter face
IF FILTER
CSB
SD
SCL
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
SEG14
SEG15
SEG16
SEG17
SEG18
SEG19
SEG20
SEG21
SEG22
SEG23
SEG24
SEG4
SEG3
SEG2
SEG1
SEG0
COM3
COM2
COM1
COM0
VLCD
CLKIN
VDD
SD
SCL
CSB
VSS
LED
SEG27
SEG26
SEG25
Figure 2. Block Diagram
Figure 3. Pin Configuration (TOP VIEW)
Terminal
CSB
Terminal
number
26
SCL 27
SD 28
VDD
29
CLKIN
30
VSS
25
VLCD
31
COM0 to 3
SEG0 to 22
SEG23 to 27
32 to 35
36 to 40
1 to 18
19 to 23
LED 24
Table 1 Pin Description
I/O
Unused
case
I - Chip select: "L" active
Function
I - Serial data transfer clock
I - Input serial data
- - Power supply for LOGIC
I
OPEN / VSS
External clock input terminal (for display/PWM using selectable);
Support Hi-Z input mode at internal clock mode
- - GND
- - Power supply for LCD
O
OPEN
COMMON output for LCD
O
OPEN
SEGMENT output for LCD
O
OPEN
SEGMENT output for LCD/GPO
O
OPEN
LED driver output
www.rohm.com
© 2013 ROHM Co., Ltd. All rights reserved.
TSZ2211115001
2/28
TSZ02201-0A0A2D300070-1-2
10.Apr.2015 Rev.004


Part Number BU97931FV
Description Multifunction LCD Segment Driver
Maker ROHM
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BU97931FV Datasheet PDF






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