BU97941FV

○

Product structure：Silicon monolithic integrated circuit ○This product is not designed protection against radioactive rays.

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TSZ02201-0A0A2D300080-1-2

1.Jun.2012 Rev.001

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TSZ22111･14･001

Datasheet

Multifunction LCD Segment Driver

BU97941FV

MAX 104 segments (SEG26×COM4)

●Features

Integrated RAM for display data (DDRAM):

26 x 4 bit (Max 104 Segments)

LCD drive output:

4 Common output, 26 Segment output

Integrated 4ch LED driver circuit

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

●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:

+2.7V to +5.5V

■

Operating Temperature Range:

-40°C to +85°C

■

Max Segments:

104 Segments

■

Display Duty:

Static, 1/3, 1/4 selectable

■

Bias:

Static, 1/3

■

Interface:

3wire serial interface

●Package

W (Typ.) x D (Typ.) x H (Max.)

●Typical Application Circuit

Figure 1.

Typical application circuit

SSOP-B40

13.60mm x 7.80mm x 2.00mm

Signal input from controller

*About resistor value

Determine the optimal value

based on the applied current

With 25mA as max per 1 port

5.0V

3.3V

VLCD

VDD

CSB

SD

SCL

VSS

BU979 41FV

LCD

COM0 to COM3

SEG0 to SEG25

LED1

VLED=5.0V

LED2

LED3

LED4