11AA020T-I/SN

Overview

The Microchip Technology 11AA020T-I/SN is a 2 Kbit (256 x 8) serial EEPROM utilizing the UNI/O single I/O bus interface. It operates within a supply voltage range of 1.8 V to 5.5 V and supports a maximum bit rate of 100 kbps. The device features Schmitt trigger inputs, output slope control, and a 16-byte page-write buffer. It provides high reliability with 1,000,000 erase/write cycles and data retention exceeding 200 years. The component is housed in an MSOP-8 package and functions within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Supports the patented UNI/O single I/O serial protocol using Manchester encoding for combined clock and data transmission on the SCIO pin.
• Includes built-in write protection mechanisms such as power-on/off data protection circuitry and a configurable block write protection feature.
• Features a current-limited output driver to prevent high current conditions arising from bus conflicts and ground bounce.

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Device identification and parameter logging

Procurement Notes

Verify that the ordering suffix corresponds to the MSOP-8 package and Industrial temperature grade. Confirm the specific revision level matches the design requirements. Ensure compatibility with the host controller's ability to implement the UNI/O Manchester encoding protocol. Check for any specific environmental certifications required by the target application standards.

Selection Notes

Select this part when a low-pin-count non-volatile memory solution is required for systems operating at voltages down to 1.8 V. It is suitable for applications needing robust write protection and high endurance. Consider the 16-byte page buffer size for write efficiency. Ensure the host microcontroller has a spare GPIO capable of driving the SCIO line according to the specified timing constraints.

Part Context

This component belongs to the 11AAXXX/11LCXXX family of serial EEPROMs. The 'AA' designation indicates operation down to 1.8 V, while 'LC' variants operate from 2.5 V. The 'SN' suffix identifies the MSOP-8 surface mount package. The 'I' suffix denotes the Industrial temperature range. This family shares the same UNI/O interface architecture across various densities from 1 Kbit to 16 Kbit.

Replacement Considerations

Compatible substitutes within the same density and package include the 11AA020T-I/MS. Other family members like the 11AA010 or 11AA040 offer different capacities but share the interface. Cross-voltage equivalents such as the 11LC020 series are available but require a minimum supply voltage of 2.5 V.