The X22C12DI is a 128 x 8 (1024-bit) CMOS nonvolatile static RAM (NVSRAM) manufactured by Xicor Inc. This device combines the fast access time of a static RAM with the non-volatile data storage capabilities of an EEPROM. It's designed to retain data even when power is removed, making it suitable for applications requiring data persistence and quick read/write operations.

Applications:

• Data logging systems.
• Industrial control equipment.
• Point-of-sale (POS) terminals.
• Metering devices.
• Battery-backed memory replacement.

Features:

• 128 x 8 (1024-bit) nonvolatile static RAM.
• Fast access time: typically 200 ns.
• Automatic store on power-down.
• Software-controlled store and recall.
• Unlimited read, write, and recall cycles.
• 10,000 store cycles.
• Single 5V supply operation.
• TTL compatible inputs and outputs.
• DIP-16 package.

Benefits:

• Data retention without external battery backup.
• Fast read and write access for real-time applications.
• Automatic data protection in case of power failure.
• Flexible data storage management through software control.
• High endurance for reliable operation.
• Easy integration with standard logic circuits.

Additional Details:

The X22C12DI features both automatic and software-controlled store operations. The automatic store function is triggered when the supply voltage falls below a certain threshold, ensuring that data is backed up to the EEPROM before power is completely lost. The software-controlled store and recall functions allow the user to manually manage data storage. The device's non-volatile memory is based on EEPROM technology, which provides long-term data retention. The TTL compatible inputs and outputs make it easy to interface the X22C12DI with a wide range of microprocessors and digital circuits. The standard DIP-16 package simplifies through-hole mounting on PCBs.

Key specifications include a typical supply current during operation of around 25mA and a standby current of just a few microamps. The storage temperature range is typically -55°C to +125°C, ensuring reliable storage even in harsh conditions. While 10,000 store cycles are guaranteed, in practical applications, the EEPROM can often withstand many more write cycles before any degradation in data retention occurs.