The W742S/E81A W742E81A is electrical erasable EPROM type) is a high-performance 4-bit Microcontroller (C) that built in 160-dot LCD Driver It is one of series in Winbond telephone family that supports CID telephone solution .It is a High-end 4-bit MCU equipped with ROM, RAM, various Timers , one channel DTMF generator. It works under wide Voltage Range and Wide Frequency Range (from 400KHz to 3.58MHz). that is suitable for Caller ID, Message phone , Multi-function phone, FRS, RCC, and consumer related applications
By Winbond Electronics Corp America
W742E81A 's PackagesW742E81A 's pdf datasheet

W742E81A Pinout, Pinouts
W742E81A pinout,Pin out
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