BU9796FS Datasheet, PDF (1/12 Pages) Rohm – LCD Segment Driver series 80-segment Drivers (20SEG×4COM)

LCD Segment Driver series
80-segment Drivers
(20SEG×4COM)
BU9796FS
No.09044EAT02
●Description
This is LCD segment driver for 80 segment type display. There is a lineup which is suitable for multi function display and is
integrated display RAM and power supply circuit for LCD driving with 4 common output type: BU9796FS.
●Features
1) 2wire serial interface
2) Integrated RAM for display data (DDRAM) ： 20 × 4bit (Max 80 Segment)
3) LCD driving port： 4 Common output, 20 Segment output
4) Display Duty: 1/4 duty
5) Integrated Oscillation circuit
6) Integrated Buffer AMP for LCD driving power supply circuit
7) Support 1/2bias, 1/3bias select
8) No external components
9) Low voltage / low power consumption design: 2.5~5.5V
●Applications
Telephone, FAX, Portable equipments (POS, ECR, PDA etc.),
DSC, DVC, Car audio, Home electrical appliance, Meter equipment etc.
● Absolute Maximum Ratings （Ta=25degree, VSS=0V）
Parameter
Symbol
Limits
Power Supply Voltage1
VDD
-0.5 ～ +7.0
Power Supply Voltage2
VLCD
-0.5 ～ +7.0
Allowable loss
Pd
0.64
Input voltage range
VIN
-0.5 ～ VDD+0.5
Operational temperature
range
Topr
Storage temperature
range
Tstg
-40 ～ +85
-55 ～ +125
*This product is not designed against radioactive ray.
Unit
V
V
W
V
degree
Remarks
Power supply
LCD drive voltage
When use more than Ta=25C, subtract
6.4mW per degree.
degree
● Recommend operating conditions (Ta=25degree, VSS=0V)
Parameter
Symbol
MIN
TYP
MAX
Unit
Remarks
Power Supply Voltage1
VDD
2.5
-
5.5
V
Power supply
Power Supply Voltage2
VLCD
0
-
VDD-2.4
V
LCD drive voltage
* Please use in the range of VDD-VLCD≧ 2.4V
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2009.05 - Rev.A