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2009.05 - Rev.A

© 2009 ROHM Co., Ltd. All rights reserved.

LCD Segment Driver series

80-segment Drivers

(20SEG×4COM)

BU9796FS

●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

Unit

Remarks

Power Supply Voltage1

VDD

-0.5 ～ +7.0

V

Power supply

Power Supply Voltage2

VLCD

-0.5 ～ +7.0

V

LCD drive voltage

Allowable loss

Pd

0.64

W

When use more than Ta=25

C, subtract

6.4mW per degree.

Input voltage range

VIN

-0.5 ～ VDD+0.5

V

Operational temperature

range

Topr

-40 ～ +85

degree

Storage temperature

range

Tstg

-55 ～ +125

degree

*This product is not designed against radioactive ray.

● 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

No.09044EAT02