BU9728 Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BU9728

For 128～ 140 Segment type LCD, LCD Segment Driver

ROHM Semiconductor 

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

10/23

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