25LC640A-H/SN

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The 25LC640A-H/SN memory is a Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). It is a 2,048 byte device organized as 256 locations of 8 bytes each. The device has an 8-byte page write or buffer write and is available in an 8-pin PDIP, SOIC and TSSOP with a wide operating voltage range of 2.7-3.6 and 5.0 volts covering memory operation, program erase, and write operations.

The 25LC640A-H/SN memory offers a variety of features including low-power consumption, voltage and temperature range, security lock and erase/write endurance. Low-power consumption allows many applications to run on small batteries, while voltage and temperature range maintenance provides reliable data operations. Security lock I/O provides a write-protect feature while erase/write endurance ensures long-term EEPROM stability. In addition, this memory also features fast operation with concurrent read and write operations.

The 25LC640A-H/SN memory has many applications, including automotive, consumer, industrial, and medical. For automotive application, the 25LC640A-H/SN memory provides the memory and reliability needed to help prevent vehicular accidents. In consumer application, the memory can be used for personal digital assistant (PDA), cellular phones and other consumer electronic devices. In industrial application, the memory provides the non-volatile storage for data logging and control in a variety of devices ranging from relays and sensors to programmable logic controllers. For medical application, the 25LC640A-H/SN memory can be used for medical information management, including patient records and medical equipment data.

The working principle of the 25LC640A-H/SN memory is based on metal-oxide-semiconductor (MOS) technology. In this technology, the stored data is encoded in a MOS transistor. A charged capacitor stores one bit of data. When a “write” operation takes place, the data is transferred from the capacitor to the MOS gate. The stored data remains in the gate until an erase or “read” operation takes place.

As with other EEPROMs, the 25LC640A-H/SN memory has two buses, the control bus and the data bus. The control bus is used to send control signals between the host device and the 25LC640A-H/SN memory. This includes an address to specify the specific memory location to be operated on and a control signal to initiate the operation. The data bus is used by the host device to send and receive data from the 25LC640A-H/SN memory.

The 25LC640A-H/SN memory can be used for various memory needs in automotive, consumer, industrial, and medical applications. The device provides ease-of-use, low-power consumption, voltage range, high-temperature stability, fast operation, security lock, and endurance. All these features make it a suitable memory for many applications.

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