The CAT25C16VI is a 16Kb Serial CMOS EEPROM manufactured by Catalyst Semiconductor (now ON Semiconductor). It is a non-volatile memory device that can be electrically erased and reprogrammed. It uses the SPI (Serial Peripheral Interface) for communication, providing a straightforward interface for microcontrollers and other digital systems.

Applications:

• Storage of configuration data in electronic equipment.
• Data logging in various applications.
• Storage of serial numbers and identification codes.
• Storing calibration constants for sensors.
• Replacement for DIP switches and potentiometers in adjustable circuits.

Features:

• 16Kb (2048 x 8 bits) memory capacity.
• SPI (Serial Peripheral Interface) for communication.
• Operating voltage: 4.5V to 5.5V.
• Low power CMOS technology.
• Hardware write protection.
• Software write protection.
• Self-timed write cycle.
• High reliability and data retention.
• Available in DIP and SOIC packages.

Benefits:

• Simple interface to microcontrollers via SPI.
• Non-volatile memory retains data without power.
• Low power consumption.
• Write protection features prevent data corruption.
• High reliability for long-term data storage.

Additional Details:

The CAT25C16VI operates over a temperature range of -40°C to +85°C. It supports SPI modes 0 and 3. The write cycle time is typically 5 ms. The device provides both hardware (WP pin) and software (status register) write protection options. The DIP and SOIC packages provide flexibility in mounting. This EEPROM is commonly used in applications requiring infrequent writes and long-term data storage in systems operating at 5V. The SPI communication requires four pins: Serial Clock (SCK), Master Out Slave In (MOSI), Master In Slave Out (MISO), and Chip Select (/CS).