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PDF BU97981GU-E2 Data sheet ( Hoja de datos )
| Número de pieza | BU97981GU-E2 | |
| Descripción | Multi-function LCD Segment Drivers | |
| Fabricantes | ROHM Semiconductor | |
| Logotipo |  |
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Datasheet
Multi-function LCD Segment Drivers
BU97981xxx Series MAX 196 Segments (SEG49xCOM4)
Features
Integrated RAM for Display Data (DDRAM):
49 x4 Bit (Max 196 Segment)
LCD Drive Output:
4 Common Output, Max 49 Segment Output
Integrated 3ch LED Driver Circuit
Segment/ LED (Max 3port) Output Mode Selectable
Segment/ GPO (Max 31port) Output Mode
Selectable
Support PWM Generation from Ext. or Internal
Clock
(Resolution: 8bit Mode/12bit Mode Selectable)
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)
Applications
Telephone
FAX
Portable Equipment (POS, ECR, PDA etc.)
DSC
DVC
Car audio
Home Electrical Appliance
Meter Equipment
etc.
Key Specifications
■ Supply Voltage Range:
+1.8V to +3.6V
■ LCD Drive Power Supply Range: +3.3V to +5.5V
■ Operating Temperature Range: -30°C to +75°C
■ Max Segments:
BU97981KV
196 Segments
BU97981MUV
168 Segments
BU97981GU
196 Segments
■ Max GPO Outputs:
BU97981KV
31port
BU97981MUV
27port
BU97981GU
31port
■ Max LED Drive Outputs:
BU97981KV
3port
BU97981MUV
3port
BU97981GU
3port
■ Display Duty:
Static. 1/3, 1/4 Selectable
■ Bias:
Static, 1/3
■ Integrated Regulator for LCD Drive:
3.2, 3.3, 3.4, 4.4, 4.5, 4.6, 5.0V Selectable
■ Interface:
3wire Serial Interface
Typical Application Circuit
BU97981KV LED/GPO using case
LED : 3port
GPO : 5port
LCD :164seg
VLED
5.0V 3.3V
VLCD
VDD
SEG48 (LED1)
SEG47 (LED2)
SEG46 (LED3)
BU97981KV
*Reading resistor value
Please detect the value according to
inpu curremt value.
(cuurent MAX = 20mA)
SEG45(GPO1) to
SEG41(GPO5)
Other
device
VSS1
VSS2
TEST1 CSB SCL SD INHb CLKIN
SEG0 to SEG40
COM0 to COM3
LCD
Input signal from cintroller
＊CLKIN
Extenal CLK input terminal
In case being unused, connect to
VSS or be opened.
Figure 1. Typical Application Circuit
○Product structure：Silicon monolithic integrated circuit
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･14･001
○This product has no designed protection against radioactive rays.
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1 page  
BU97981xxx Series MAX 196 segments (SEG49xCOM4)
Datasheet
Absolute Maximum Ratings (VSS=0V)
Parameter
Symbol
Ratings
Unit
Remarks
Power Supply Voltage 1
VDD
-0.3 to +4.5
V Power supply
Power Supply Voltage 2
Power Dissipation
VLCD
Pd
-0.5 to +7.0
1.0 (Note1)
3.6 (Note2)
0.8 (Note3)
V Power supply for LCD
BU97981KV
W BU97981MUV
BU97981GU
Input Voltage Range
VIN
-0.5 to VDD+0.5
V
Operational Temperature Range
Topr
-30 to +75
°C
Storage Temperature Range
Tstg
-55 to +125
°C
Iout1
5 mA SEG output
Output Current
Iout2
Iout3
5 mA COM output
10 mA GPO output
Iout4
50 mA LED output
(Note1) When use more than Ta=25°C, subtract 10mW per degree. (using ROHM standard board)
(board size：70mm×70mm×1.6mm material: FR4 board copper foil: land pattern only).
(Note2) When use more than Ta=25°C, subtract 36mW per degree. (using ROHM standard board)
(board size：74.2mm×74.2mm×1.6mm SEMI standard 4 layer board)
(Note3) When operated higher than Ta=25°C, subtract 8.0mW per degree. (using ROHM standard board)
(board size：114.3mm×76.2mm×1.6mm)
Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit
between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over
the absolute maximum ratings.
Recommended Operating Conditions (Ta=-30°C to +75°C,VSS=0V)
Parameter
Symbol
Ratings
Unit
Min Typ Max
Remarks
Power Supply Voltage 1 VDD
1.8
-
3.6 V Power supply
Power Supply Voltage 2 VLCD
3.3
-
5.5 V Power supply for LCD
LED Supply Voltage
VLED
1.0
- VLCD V Power supply for LED
Output Current
Iout4
Iout4
-
-
- 20 mA Per LED port 1ch
- 60 mA Total LED port current
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
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TSZ02201-0A2A0D300110-1-2
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5 Page 
BU97981xxx Series MAX 196 segments (SEG49xCOM4)
I/O Equivalence Circuit – Continued
(BU97981MUV)
VLCD
VDD
VSS1
VSS1
VDD
TEST1
VSS
VDD
CSB, SD,
SCL,INHb
CLKIN
VSS
VDD
SEG0-11
COM0-3
VSS1
VLCD
SEG39-41
VSS2
VSS1
VLCD
SEG12-38
VSS1
Figure 10. I/O Equivalence Circuit
Datasheet
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111･15･001
11/46
TSZ02201-0A2A0D300110-1-2
10.Apr.2015 Rev.006
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet BU97981GU-E2.PDF ] | |
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