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BU97981KV-E2 Datasheet(PDF) 1 Page - Rohm

Part # BU97981KV-E2
Description  Multi-function LCD Segment Drivers
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BU97981KV-E2 Datasheet(HTML) 1 Page - Rohm

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Product structure:Silicon monolithic integrated circuit ○This product has no designed protection against radioactive rays.
1/46
TSZ02201-0A2A0D300110-1-2
10.Apr.2015 Rev.006
www.rohm.com
© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111・14・001
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
*Reading resistor value
Please detect the value according to
inpu curremt value.
(cuurent MAX = 20mA)
5.0V
3.3V
VLCD
VDD
CLKIN
CSB SCL SD
VSS1
BU97981KV
LCD
COM0 to COM3
SEG0 to SEG40
SEG48 (LED1)
Input signal from cintroller
CLKIN
Extenal CLK input terminal
In case being unused, connect to
VSS or be opened.
INHb
VSS2
TEST1
VLED
SEG45(GPO1) to
SEG41(GPO5)
Other
device
SEG47 (LED2)
SEG46 (LED3)
Figure 1. Typical Application Circuit
Datasheet


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