BU9728AKV_08 Datasheet, PDF (10/24 Pages) Rohm – For 128-140 Segment type LCD LCD Segment Driver

BU9795AKV/FV/GUW
MAX140Segment (SEG35×COM4) Driver
● Feature (BU9795AKV/AFV/AGUW)
1) 3wire serial interface (CSB, SD, SCL)
2) Integrated RAM for display data (DDRAM) : 35 × 4bit (Max 140 Segment)
3) LCD driving port: 4 Common output,
Segment: 35output (BU9795AKV), 31output (BU9795AGUW), 27output (BU9795AFV)
4) Display duty: 1/4 duty
5) Integrated Buffer AMP for LCD driving power supply
6) 1/2bias, 1/3bias selectable
7) No external components
8) Low power/ Ultra low power consumption design: +2.5～5.5V
● Uses (BU9795AKV/AFV/AGUW)
Telephone, FAX, Portable equipment (POS, ECR, PDA etc.),
DSC, DVC, Car audio, Home electrical appliance, Meter equipment etc.
● Line-up
Parameter
Segment output
Common output
Package
BU9795AKV
35
4
VQFP48C
BU9795AFV
27
4
SSOP-B40
BU9795AGUW
31
4
VBGA48W040
● Absolute Maximum Ratings (Ta=25degree, VSS=0V)
Parameter
Symbol
Limits
Power supply voltage1 VDD
-0.5 ～ +7.0
Power supply voltage2 VLCD -0.5 ～ VDD
0.6
Allowable loss
Pd
0.7
0.27
Input voltage range
VIN
-0.5 ～
VDD+0.5
Operational
temperature range
Topr
-40 ～ +85
Storage temperature range Tstg
-55 ～ +125
*This product is not designed against radioactive ray.
(BU9795AKV/AFV/AGUW)
Unit
Remark
V
Power supply
V
LCD drive voltage
W
When use more than Ta=25C, subtract
6mW per degree.(BU9795AKV)
W
When use more than Ta=25C, subtract
7mW per degree (BU9795AFV)
W
When use more than Ta=25C, subtract
2.7mW per degree (BU9795AGUW)
V
degree
degree
● Recommend operating conditions (Ta=25degree,VSS=0V) (BU9795AKV/AFV/AGUW)
Parameter
Symbol Min. Typ.
Power Supply voltage1 VDD 2.5 -
Power Supply voltage2 VLCD 0
-
* Please use VDD-VLCD≧2.4V condition.
Max.
5.5
VDD-2.4
Unit
Remark
V Power supply
V LCD drive voltage
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