25LC640A-E/ST

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The 25LC640A-E/ST is a 64K serial EEPROM memory product from Microchip which is specifically designed for low power and low voltage operations. It is commonly used in embedded systems and consumer electronics applications. It is a reliable, versatile and cost effective solution for applications which require non-volatile storage for data and programs.

The 25LC640A-E/ST memory device is offered in an 8-pin SOIC, 8-pin PDIP or 6-pin TSSOP package. The device provides 8,192 pages or 64,000 words of 8-bits each. It has an operating voltage range of 1.8V - 5.5V, and a maximum clock rate of 10MHz. The memory is organized as 8K x 8-bits (16K x 4-bits). The device supports both Sequential and Random reads.

The 25LC640A-E/ST memory device is a byte-oriented device, meaning that the data is organized in bytes (8 bits). Each byte of data stored in the memory is associated with an internal address which can be used to identify the byte of data. The addresses in the memory are incremented automatically after each data byte is read or written.

The 25LC640A-E/ST features a high-speed four-wire serial interface which is compatible with SPI and Microwire protocols. The device can be used in an SPI or Microwire Bus system. It supports both single and multiple devices on the same interface. It also provides hardware write protect and hardware address counter protection through the HOLD pin.

The 25LC640A-E/ST also features a write-protect/power-on reset circuitry feature. When the device power-on, the write protection circuitry is activated and the protected memory locations can not be changed until the power-on reset signal is issued. This prevents inadvertent data destruction in the protected locations.

The 25LC640A-E/ST memory device is a versatile and cost effective solution for applications which require non-volatile storage for data and programs. It is well suited for various embedded systems and consumer electronics applications such as security systems, industrial controllers, voice and signal recorders, audio and video players, as well as compact and hand held applications.

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