BU97941FV-LB Datasheet, PDF (5/26 Pages) Rohm – Multifunction LCD Segment Driver

BU97941FV-LB MAX 104 segments (SEG26×COM4)
I/O Equivalence Circuit
VLCD
VDD
VSS
VDD
CSB, SD,
SCL,CLKIN
VSS
LED1-4
VSS
VLCD
SEG0-25
COM0-3
VSS
Datasheet
VSS
Figure 5. I/O equivalence circuit
Example of Recommended Circuit
5.0V
3.3V
About resistor value
Determine the optimal value
based on the applied current
With 25mA as max per 1 port
VLCD
VDD
LED1
LED2
LED3
LED4
BU97941FV-LB
SEG0 to SEG25
VSS
CSB SD SCL
COM0 to COM3
Signal input from controller
VLED=5.0V
LCD
Figure 6. Recommended circuit example
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TSZ02201-0P4P0D300500-1-2
26.Feb.2014 Rev.002