The DS1643-120 is a 64k Nonvolatile Static RAM (NVSRAM) from Dallas Semiconductor (now Maxim Integrated). It combines the fast access time of a static RAM with the non-volatility of an EEPROM. The 120 indicates the access time of 120ns.

Applications:

• Data Logging
• Point-of-Sale (POS) Terminals
• Industrial Control Systems
• Medical Equipment
• Networking Equipment

Features:

• 64k (8k x 8) Nonvolatile SRAM
• Unlimited Write Cycles
• 120 ns Access Time
• Automatic Data Transfer on Power-Down
• Software Write Protection
• Low Power Operation

Benefits:

• Provides reliable data storage even during power outages
• Offers fast read and write speeds
• Eliminates the need for battery backup in many applications
• Protects data from accidental modification
• Reduces system power consumption
• Simplifies system design

The DS1643-120 NVSRAM is ideal for applications requiring frequent data updates and reliable data retention. The automatic data transfer feature ensures that data is automatically backed up to the EEPROM section of the device when power is lost. The software write protection feature prevents accidental overwriting of critical data. It is an end-of-life product but may still be available through distributors.