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BU97931FV-LB Datasheet

Multifunction LCD Segment Driver

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Datasheet
MAX 112 segments (SEG28×COM4)
Multifunction LCD Segment Driver
BU97931FV-LB
This is the product guarantees long time support in Industrial
market.
Features
„ Long Time Support Product for Industrial Equipment
„ 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
„ Industrial Equipment
„ Telephone
„ FAX
„ Portable Equipment (POS, ECR, PDA etc.)
„ DSC
„ DVC
„ Car audio
„ Home Electrical Appliance
„ Meter Equipment
Etc.
Typical Application Circuit
SSOP-B40
13.60mm x 7.80mm x 2.00mm
VLED=5.0V
LED/GPO using case
.0V 3.3V
VLCD
VDD
LED
BU97931 FV-LB
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 has no designed protection against radioactive rays.
1/29
TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002


Rohm Semiconductor Electronic Components Datasheet

BU97931FV-LB Datasheet

Multifunction LCD Segment Driver

No Preview Available !

BU97931FV-LB MAX 112 segments (SEG28×COM4)
Block Diagram / Pin Configuration / Pin Description
VLCD
CLKIN
VDD
VSS
COM0……COM3 SEG0…22 SEG23...27
LED
LCD Voltage
Generator
Common
Driver
Segment Segment LED
Driver Driver/GPO Driver
LCD
BIAS
SELECTOR
Blink
Common Timing
Counter Generator
GPO
Controller
DDRAM
GPO Data Latch
PWM
Generator
VSS
OSCILLATOR
Power On
Reset
Command Resister
Data Decoder
Serial Interface
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
Datasheet
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
2/29
TSZ02201-0P4P0D300490-1-2
26.Feb.2014 Rev.002


Part Number BU97931FV-LB
Description Multifunction LCD Segment Driver
Maker ROHM
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