The DS1644-120+ is an IC (integrated circuit) component designed and manufactured by Maxim Integrated. It is a nonvolatile static RAM (NVSRAM) that combines the benefits of both SRAM and EEPROM technologies. This advanced IC offers high-density storage along with reliable, long-term data retention.
Here are the key features of the DS1644-120+:
1. High Density: The DS1644-120+ provides a storage capacity of 16384 bits organized as 2048 words by 8 bits. This high-density configuration makes it suitable for applications that require large amounts of nonvolatile memory.
2. Nonvolatile SRAM: Unlike traditional SRAM, the DS1644-120+ operates as nonvolatile memory by employing a small external 2.7V to 3.6V lithium energy source. This enables data retention even when power is disconnected. It eliminates the need for backup batteries or additional circuitry.
3. Integrated Battery Monitor: The IC incorporates a battery monitor function that tracks the energy level of the external battery. It provides an early warning signal when the battery's voltage falls below a specified threshold, allowing users to replace it before data loss occurs.
4. Automatic Switchover: The DS1644-120+ automatically switches between the energy source (battery) and the main power supply. When the main power is present, the NVSRAM operates from the regular VCC supply
