MSM6669 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM6669

80-DOT LCD SEGMENT DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM6669

• V1, V3, V4, VEE

Bias supply voltage pins to drive the LCD. Bias voltages for the LCD driving are supplied

from an external source.

Truth Table

DF

L

L

H

H

X

X: Don't care

Latch Data

L

H

L

H

X

DISP OFF

H

H

H

H

L

Driver Output Level (O1 - O80)

V3

V1

V4

VEE

V1

NOTES ON USE

Note the following when turning power on and off:

The LCD drivers of this IC require a high voltage. For this reason, if a high voltage is applied to

the LCD drivers with the logic power supply floating, excess current flows. This may damage

the IC. Be sure to carry out the following power-on and power-off sequences:

When turning power on:

First VDD ON, next VEE, V4, V3, V1 ON. Or both ON at the same time.

When turning power off:

First VEE, V4, V3, V1 OFF, next VDD OFF. Or both OFF at the same time.

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