Microchip 64 kB Serial EEPROM, 230 ns 8-Pin SOIC Serial-SPI 25LC640-I/P

Microchip 25LC640-I/P is a high-reliability 64 kB Serial Electrically Erasable Programmable Read-Only Memory (EEPROM) optimized for industrial electronic components applications. Featuring a Serial Peripheral Interface (SPI) compatible serial bus, it allows straightforward serial communication with devices using clock input (SCK), data input/output (SI and SO), and chip select (CS) lines.

This EEPROM offers a memory organization of 8192 x 8 bits, with a maximum clock frequency of 3 MHz and access time as fast as 230 ns, allowing swift data operations suitable for embedded systems and control applications.

The low-power CMOS technology minimizes energy consumption, with a typical write current of 3 mA, read current of 500 μA, and ultra-low standby current of 500 nA, ideal for battery-operated and portable devices.

Operating voltage range is wide from 2.5V to 5.5V and the device supports industrial temperature ranges from -40°C to +85°C, enhancing its use in harsh environments. The device is designed with built-in data protection circuits including write enable latch and write-protect pin, ensuring data integrity through power interruptions and providing flexible block write protection.

This product is housed in an 8-pin SOIC through-hole package measuring 9.4 mm length, 6.35 mm width, and 3.3 mm height, enabling convenient integration on printed circuit boards with robust mounting.

Memory size: 64 kB in 8K x 8 bit organisation. Data retention guaranteed for over 200 years for secure long-term data storage. Maximum clock frequency of 3 MHz supports high-speed data communication. Low power consumption with 3 mA write current and 500 nA standby current.

Industrial temperature range from -40°C to +85°C for reliable operation under tough conditions. Self-timed erase and write cycles with block write protection for enhanced data safety. Standard 8-pin SOIC package type for easy PCB mounting and reliable connections.

Typical applications include embedded system memory, industrial control systems, data logging, and electronic calibration storage. The device does not comply with automotive standards but is suitable for many industrial and commercial uses.

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