11AA020-I/MS

Overview

The Microchip Technology 11AA020-I/MS is a 2 Kbit (256 x 8) serial electrically erasable programmable read-only memory (EEPROM). It operates within a supply voltage range of 1.8 V to 5.5 V and supports an industrial temperature range from -40°C to +85°C. The device utilizes the UNI/O single I/O serial interface bus with a maximum bit rate of 100 kbps. It features a 16-byte page-write buffer, self-timed write cycles, and block write protection capabilities.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding for clock and data transmission on a single pin.
• Includes built-in write protection mechanisms such as power-on/off data protection circuitry and a configurable write enable latch.
• Features output slope control to eliminate ground bounce and Schmitt trigger inputs for enhanced noise suppression.
• Provides high reliability with specified endurance of one million erase/write cycles and data retention exceeding two hundred years.

Applications

• Interfacing with microcontrollers requiring low-pin-count non-volatile storage
• ASIC applications needing compact serial EEPROM solutions
• Industrial control systems operating in harsh electrical environments

Procurement Notes

Verify that the ordering suffix matches the required package type and temperature grade. Confirm the specific density variant corresponds to the application requirements. Ensure compatibility with the host controller's ability to implement the UNI/O protocol. Check for any specific manufacturing date codes or lot traceability needs. Validate that the supply voltage range aligns with the system design constraints.

Selection Notes

Select this component when a single-wire serial interface is preferred to minimize pin count. Consider the 1.8 V minimum operating voltage for low-power designs. Evaluate the need for block write protection if security against accidental writes is critical. Assess the requirement for high endurance cycles in frequently updated data logging scenarios.

Part Context

This part belongs to the 11XX family of serial EEPROMs, which includes densities ranging from 1 Kbit to 16 Kbit. The 'AA' designation indicates support for the 1.8 V supply voltage range, distinguishing it from the 'LC' series which requires a minimum of 2.5 V. The 'I' suffix denotes the industrial temperature rating.

Replacement Considerations

Compatible substitutes include other members of the 11AA020 family with different package options, such as 11AA020T-I/TT or 11AA020-I/SN. Devices like the 11LC020 offer similar functionality but require a higher minimum supply voltage of 2.5 V.