25AA02E48T-I/OT

The 25AA02E48T-I/OT is a 2K bit electrically erasable programmable serial EEPROM organized as 256 words of 8 bits each. This device is designed to interface easily to microprocessors, thereby eliminating the need for extra connection lines, buffers and glue logic. It is designed to operate at a maximum clock frequency of 6MHz in both the read and write modes. The 25AA02E48T-I/OT is part of a family of EEPROM products offered by the manufacturer and is most often available as a 28-pin SSOP package.

The 25AA02E48T-I/OT is an EEPROM device, which by most definitions is a form of non-volatile memory, specifically an integrated circuit (IC) built to last and function in an uninterrupted state even if power is temporarily or permanently removed from the circuit.

Its main application field is to store data for subsequent retrieval, such as working parameters for automation equipment, stored user settings for a piece of equipment or instrument, to act as a data logging device over a period of time, or to provide easy translation from one logic level to another.

The 25AA02E48T-I/OT has a simple working principle in which data is written and read using either the standard Serial Peripheral Interface (SPI) bus or the more complex Microwire bus protocol. After power is applied to the device, the SPI serial clock (SCK) and serial data In/Out (SDI/O) lines are used to write the data. Data is written to the device one byte at a time, and the data can be read out in the same manner. Depending on the device configuration, up to eight bytes can be written to memory at one time.

The programming of the device is done in two steps. First, the user sends the op-code for the instruction to be executed on the SDI line. This is then followed by seven data bytes along with the address bits for the location where the data is to be written. For reading, only the address bits need to be sent. After the address data is received, the device sends out the data byte containing the information stored in the specified address as requested.

The 25AA02E48T-I/OT is an advanced member of EEPROM family, which can be use to store data reliably for a long period of time. It is easy to interface with microprocessors through SPI or Microwire bus protocol, and can support up to 6MHz of clock frequency for both the read and the write mode. With its easy programming and simple working principle, it is a very popular choice for data storage in automation equipment, data logging over a period of time, for storing user settings and for providing easy transitions from one logic level to another.