LH1694 データシートの表示（PDF） - Sharp Electronics

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LH1694

256-output TFT-LCD Gate Driver IC

Sharp Electronics 

PRECAUTIONS

Precautions when connecting or disconnecting

the power supply

This IC has a high-voltage LCD driver, so it may be

permanently damaged by a high current which may

flow if voltage is supplied to the LCD drive power

supply while the logic system power supply is

floating. Therefore, when connecting the power

supply, observe the following sequence.

Logic system power supply (VLS) or internal

logic system power supply (VSS, VCC; VCC >

VSS) / logic input / LCD drive power supply

(VEE, VDD)

It is possible to set voltage VEE to the same as

VSS. When connecting the power supply when VEE

= VSS, observe the following sequence and the

recommended sequence figure shown below.

LH1694

Logic system power supply (VLS), internal logic

system power supply (VSS, VCC; VCC > VSS)

and low-level LCD drive power supply (VEE) /

logic input / high-level LCD drive power supply

(VDD)

When disconnecting the power supply, follow the

reverse sequence.

Since the logic state of the internal circuit is

unstable immediately after the logic system power

is supplied, input CKV and SVIO (or SVOI) while

initializing the internal circuit (minimum input clock

number is 256 CKV).

Input

VDD

VLS

0V

VCC

VSS, VEE

Input pin setting

Input pins other than CKV, SVIO and SVOI must

be set to "H" or "L" level.

Maximum ratings

When connecting or disconnecting the power, this

IC must be used within the range of the absolute

maximum ratings.

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