bu9798kv ROHM Co. Ltd., bu9798kv Datasheet

bu9798kv

Manufacturer Part Number

bu9798kv

Description

Lcd Control Driver For Segment Type Lcd Display

Manufacturer

ROHM Co. Ltd.

Datasheet

1.BU9798KV.pdf (5 pages)

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Bonase Electronics (HK) Co., Limited

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bu9798kv-E2

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Rohm Semiconductor

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bu9798kv-E2

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BOSTOCK HK LIMITED

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bu9798kv-E2

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STRUCTURE

PRODUCT NAME

FUNCTION

FEATURE

○

version.

Absolute maximum ratings (VSS = 0V)

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

○ 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.

Allowable loss

（board size：70mm×70mm×1.6mm

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

LED Power supply voltage

Output current

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.

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

Parameter

Silicon monolithic integrated circuit

BU9798KV

LCD control driver for segment type LCD display

○ LCD drive output :

○ built-in Display data RAM (DDRAM) : RAM: 49*4 =196 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 (SEG15~45)

○ built-in LED driver

○ Support two output mode SEG/LED driver (SEG46~48)

○ Support PWM source select, external clock or internal clock ( 12bit / 8bit mode selectable）

○ 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, 4.0 Hz selectable）

○ Operating power supply: 1.8~3.6V

○ LCD drive power supply voltage : 3.3~5.5V

material: FR4 board

Symbol

VLCD

VLED

VDD

Iout1

Iout2

Iout3

Iout4

VDD

Iout4

VIN

Topr

Tstg

Built-in Buffer AMP, Built-in regulator (3.2, 3.3, 3.4, 4.4, 4.5, 4.6, 5.0V)

Common output : 4, Segment output : 49

MIN

1.8

3.3

1.0

REV. A

copper foil: land pattern only）

-0.5 ~ VDD+0.5

Rated values

-0.3 ~ +4.5

-0.5 ~ +7.0

-55 ~ +125

-30 ~ +75

1.0*

TYP

VLCD

MAX

3.6

5.5

Unit

℃

Power supply

For LCD drive

LED drive voltage

At one LED port

At all LED port

Power supply

LCD drive voltage

SEG ouput

COM ouput

GPO ouput

LED ouput

Remarks

1/4

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bu9798kv Summary of contents

Page 1

... STRUCTURE Silicon monolithic integrated circuit PRODUCT NAME BU9798KV FUNCTION LCD control driver for segment type LCD display ○ LCD drive output : FEATURE ○ built-in Display data RAM (DDRAM) : RAM: 49*4 =196 bit ○ 3-wire Serial interface(SD, SCL, CSB ) ○ built-in Oscillator circuit ○ ...

Page 2

COM0……COM3 SEG0 ……………………………… SEG48 VSS2 VLCD LCD voltage Generator Ref Voltage Circuit Vreg LCD BIAS SELECTOR common counter VSS INHb CLKIN OSCILLATOR Power On Reset VDD VSS TEST1 ○ Electrical Characteristics ( Ta=-30~75degree, VDD=1.8V~3.6V, VLCD=3.3V~5.5V, VSS=0 ; unless ...

Page 3

Frequency Characteristics Parameter Symbol Frame frequency 1 fFR1 Frame frequency 2 fFR2 Frame frequency 3 fFR3 CLKIN input frequency fCLK ○ Load regulation ( Ta=-30~75degree, VDD=1.8V~3.6V, VLCD=3.3V~5.5V, VSS=0 ; unless otherwise specified ) Parameter Symbol Output voltage 1 Vreg1 ...

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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