MCHP47L16-E/ST
Overview
The 47L16-E/ST is a 16Kbit EERAM (non-volatile SRAM) that combines the high speed of an SRAM with the non-volatility of an EEPROM. It operates over a 2.7V to 3.6V range and uses an I2C interface capable of 1 MHz clock speeds. This memory architecture is designed for applications that require frequent, fast data updates while ensuring data is automatically preserved during a power loss event.
Why Choose This Part
The EERAM architecture eliminates the write-cycle endurance limitations of standard EEPROM for active data processing by using the SRAM as the primary interface. It features an automatic store-to-EEPROM function on power-down and a restore-to-SRAM function on power-up, requiring only a small external capacitor for energy backup. This provides a simpler and more cost-effective alternative to NVSRAM or battery-backed SRAM solutions.
Applications
Key Specifications
Getting Started
To implement the 47L16, connect the I2C bus (SCL/SDA) and ensure a suitable VCAP capacitor is placed between the VCAP pin and ground to provide enough energy for the auto-store operation. Microchip provides an EERAM PICtail Plus Daughter Board (AC164164) for rapid evaluation with their PIC microcontrollers. Firmware integration involves standard I2C read/write commands, with optional hardware control over the store and recall functions.
