BU97981KV-E2 Datasheet, PDF (1/50 Pages) Rohm – Multi-function LCD Segment Drivers

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
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© 2012 ROHM Co., Ltd. All rights reserved.
TSZ22111ï½¥14ï½¥001
○This product has no designed protection against radioactive rays.
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TSZ02201-0A2A0D300110-1-2
10.Apr.2015 Rev.006