LC75857W-E

用按键输入功能1/3 ， 1/4占空比LCD显示驱动器 1/3, 1/4 Duty LCD Display Drivers with Key Input Function

The LC75857W is a 1/3 duty and 1/4 duty LCD display driver that can directly drive up to 164 segments and can control up to four general-purpose output ports. This product also incorporate a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.

Features

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Key input function for up to 30 keys A key scan is performed only when a key is pressed.

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1/3 duty and 1/4 duty drive schemes can be controlled from serial data.

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1/2 bias and 1/3 bias drive schemes can be controlled from serial data.

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Capable of driving up to 126 segments using 1/3 duty and up to 164 segments using 1/4 duty.

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Sleep mode and all segments off functions that are controlled from serial data.

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Switching between key scan output and segment output can be controlled from the serial data.

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The key scan operation enabled/disabled state can be controlled from the serial data.

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Switching between segment output port and general-purpose output port can be controlled from serial data.

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The common and segment output waveform frame frequency can be controlled from the serial data.

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Switching between RC oscillator mode and external clock mode can be controlled from the serial data.

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Serial data I/O supports CCB format communication with the system controller.

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Direct display of display data without the use of a decoder provides high generality.

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Independent VLCD for the LCD driver block.

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Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.