1/4 and 1/3-Duty LCD Display Driver with Key Input Function

Product ID: PT16589

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The PT16589 is 1/4 duty and 1/3 duty LCD display driver that can directly drive up to 224 segments and can control up to 5 general-purpose output ports. This product also incorporates a key scan circuit that accepts input from up to 30 keys to reduce printed circuit board wiring.
• Switching between segment output port and general-purpose output port can be controlled from serial data.• Switching between general-purpose output port, clock output port, and segment output port can be controlled from serial data. (Up to 5 general-purpose output ports and up to one clock output port)• Serial data I/O supports CCB format communication with the system controller. (Support 3.3V and 5V operation)• Sleep mode and all segments off functions that are controlled from serial data.• The frame frequency of the common and segment output waveforms can be controlled from serial data.• Switching between RC oscillator operating mode and external clock operating mode can be controlled from serial data.• Direct display of display data without the use of a decoder provides high generality.• Provision of an on-chip voltage-detection type reset circuit prevents incorrect displays.• /RES pin provided for forcibly initializing the IC internal circuits. BLOCK DIAGRAM

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