bu97931fv ROHM Co. Ltd., bu97931fv Datasheet

bu97931fv

Manufacturer Part Number

bu97931fv

Description

Lcd Control Driver For Segment Type Lcd Display

Manufacturer

ROHM Co. Ltd.

Datasheet

1.BU97931FV.pdf (5 pages)

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STRUCTURE

PRODUCTNAME

FUNCTION

FEATURE

○ Absolute maximum ratings (VSS = 0V)

○ Recommend operating conditions (Ta=-30 ~ +75degree, VSS = 0V)

version.

Allowable loss

Power supply voltage 1

Power supply voltage 2

Input voltage range

Operational temperature range

Storage temperature range

Output current

Power supply voltage 1

Power supply voltage 2

○ This product is not designed against radioactive ray.

● As for contents of mention of these materials. A service in the foreign exchange and foreign trade control law

● These goods are specific machines. Because the exclusive goods which are specially designed for the device are considered.

Status of this document

The Japanese version of this document is the formal specification. A customer may use this translation version only for a reference to help reading the formal

If there are any differences in translation version of this document, formal version takes priority.

（board size：70mm×70mm×1.6mm

Whether that machine, device corresponds to strategic goods to decide as the foreign exchange and foreign trade control law.

You must have it judged.

(Technology in the design, the manufacture and the use). Be careful of handling because it is likely to correspond.

Parameter

When use more than Ta=25 degree, subtract 10.0mW per degree. （using ROHM standard board）

Parameter

Silicon monolithic integrated circuit

BU97931FV

LCD control driver for segment type LCD display

○ LCD drive output : Common output : 4, Segment output : 28

○ Built-in Display data RAM (DDRAM) : RAM: 28*4 =112 bit

○ 3-wire Serial interface(SD, SCL, CSB )

○ Built-in Oscillator circuit

○ Built-in LCD Voltage Generator circuit: support 1/3 Bias, 1/3 or 1/4 Duty, 1/1 Bias, 1/1Duty (Static Driving)

○ Support Split Supply for Logic (VDD) and LCD (VLCD)

○ Support two output mode SEG/GPO (SEG23~27)

○ Built-in LED driver

○ Support PWM source select, external clock or internal clock (support 8bit mode）

○ Low power consumption

○ Support standby mode

○ Built-in Power-on Reset circuit

○ No external component

○ Support blink function (Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable)

○ Operating power supply: 1.8 ~ 3.6V

○ LCD drive power supply: 3.3 ~ 5.5V

Symbol

VLCD

VDD

Symbol

VLCD

VDD

Iout1

Iout2

Iout3

Iout4

VIN

Topr

Tstg

material: FR4 board

Built-in Buffer AMP

MIN

1.8

2.7

-0.5 - VDD+0.5

REV. A

Rated values

-0.3 ~ +4.5

-0.5 ~ +7.0

-55 ~ +125

-30 ~ +75

TYP

copper foil: land pattern only）

0.8*

MAX

3.6

5.5

Unit

℃

Power supply

Power supply for LCD

Power supply

Power supply for LCD

SEG output

COM output

GPO output

LED output

Remarks

1/4

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bu97931fv Summary of contents

Page 1

... STRUCTURE Silicon monolithic integrated circuit PRODUCTNAME BU97931FV FUNCTION LCD control driver for segment type LCD display ○ LCD drive output : Common output : 4, Segment output : 28 FEATURE ○ Built-in Display data RAM (DDRAM) : RAM: 28*4 =112 bit ○ 3-wire Serial interface(SD, SCL, CSB ) ○ Built-in Oscillator circuit ○ ...

Page 2

COM0……COM3 SEG0…..22, SEG23…27 VLCD LCD voltage Generator LCD BIAS SELECTOR common counter VSS CLKIN OSCILLATOR Power On Reset VDD VSS ○ Electrical Characteristics ( Ta=-30 ~ 75degree, VDD=1.8 ~ 3.6V, VLCD=2.7 ~ 5.5V, VSS=0 ; unless otherwise specified ...

Page 3

Frequency Characteristics ( Ta=-30 ~ 75degree, VDD=1.8 ~ 3.6V, VLCD=2.7 ~ 5.5V, VSS=0 ; unless otherwise specified ) Parameter Symbol Frame frequency 1 fFR1 Frame frequency 2 fFR2 Frame frequency 3 fFR3 ○ Load regulation ( Ta=-30 ~ 75degree, ...

Page 4

Cautions on use (1) Absolute Maximum Ratings An excess in the absolute maximum ratings, such as supply voltage, temperature range of operating conditions, etc., can break down devices, thus making impossible to identify breaking mode such as a short circuit ...

Page 5

No copying or reproduction of this document, in part or in whole, is permitted without the consent of ROHM Co.,Ltd. The content specified herein is subject to change for improvement without notice. The content specified herein is for the purpose ...

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