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www.rohm.com

2010.04 - Rev.A

© 2010 ROHM Co., Ltd. All rights reserved.

LCD Segment Driver series

Multifunction

Segment Drivers

BU97930MUV,BU97931FV,BU9798KV,BU9798GUW,BU97500KV

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Description

New released Multi-function type segment drivers support GPO function, LED driving function, static-driving mode, and

Blink function that can blink each segment individually.

ROHM Multi-function segment driver series contribute to reduction in cost of system and easy software development.

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Features (BU97930MUV, BU97931FV, BU9798KV/GUW)

1) LCD drive output

Common output : 4, Segment output : 27 (BU97930MUV)

Common output : 4, Segment output : 28 (BU97931FV)

Common output : 4, Segment output : 49 (BU9798KV/GUW)

2) Integrated Display data RAM (DDRAM)

RAM: 28*4 =112 bit (BU97930MUV, BU97931FV)

RAM: 49*4 =196 bit (BU9798KV/GUW)

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

4) Integrated Oscillator circuit

5) Integrated LCD Voltage generator circuit

Support: 1/3 Bias, 1/3 or 1/4 Duty

Support: 1/1 Bias, 1/1Duty (Static Driving)

Integrated buffer amp

Integrated regulator for LCD drive: 3.2, 3.3, 3.4, 4.4, 4.5, 4.6, 5.0V selectable (BU9798KV/GUW)

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

7) Integrated LED driver circuit

8) Segment terminals operation, segment output mode/GPO output mode selectable

9) Segment terminals operation, segment output mode/LED output mode selectable (BU9798KV/GUW)

10) Support PWM source select, external clock or internal clock

Resolution 8bit mode/12bit mode selectable (BU9798KV/GUW)

Resolution 8bit mode (BU97930MUV, BU97931FV)

11) Low power consumption design

12) Support standby mode

13) Integrated Power-On-Reset circuit (POR).

14) No external component

15) Support Independent blink function

Blink frequency 1.6, 2.0, 2.6, 4.0Hz selectable

16) Operating power supply : 1.8 ~ 3.6V

17) LCD drive power supply : 2.7 ~ 5.5V (BU97930MUV, BU97931FV)

: 3.3 ~ 5.5V (BU9798KV/GUW)

No.10044EAT04