UPD16666A 查看數據表（PDF） - NEC => Renesas Technology

零件编号

产品描述 (功能)

生产厂家

UPD16666A

240-OUTPUT LCD ROW DRIVER

NEC => Renesas Technology 

BLOCK DIAGRAM

X1 to X240

PPD16666A

VDD

Liquid-crystal drive circuit

V1

VEE

Selection control circuit

Q1 to Q120

Bidirectional shift register

Level shifter

DIR

VCC1

VSS

BLOCK FUNCTION

L1

L2 DOFFB’ STB

FRMB

Column driver interface

1. Liquid-crystal drive circuit

This circuit selects and outputs the level for liquid-crystal driving.

One of VDD, VEE, and V1 is selected by the output of the selection control circuit.

2. Selection control circuit

This circuit creates the signal which will select the level of the output signal, based on the output of the shift

register circuit and the driving level power selection signals L1 and L2

3. Bidirectional shift register circuit

This refers to the 120-bit bidirectional shift register circuit. The DIR signal can be used to switch over the shift

direction.

The data that has been entered from the FRMB terminal is shifted by the row drive signal strobe (STB).

4. Level shifter circuit

This circuit transforms the 5-V signals to the high-voltage signals for liquid-crystal driving.

2

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