11AA020T-I/TT

Overview

The Microchip Technology 11AA020T-I/TT 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 a 16-byte page-write buffer, self-timed write cycles, and block write protection capabilities. Designed for industrial applications, it functions reliably between -40°C and +85°C. Key electrical characteristics include a typical active current of 1 mA and a maximum standby current of 1 µA.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding on the SCIO pin.
• Includes built-in power-on/off data protection circuitry and a write enable latch for array security.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides high reliability with 1,000,000 erase/write cycle endurance and over 200 years of data retention.

Applications

• Microcontroller system configuration storage
• Calibration data and parameter logging
• Device identification and unique ID storage
• Low-pin-count embedded memory solutions

Procurement Notes

Verify the specific suffix 'TT' corresponds to the SOT-23-3 package when sourcing. Confirm the 'I' designation matches the required industrial temperature range of -40°C to +85°C. Ensure the 'AA' prefix indicates the 1.8V minimum operating voltage capability. Cross-reference the datasheet revision to confirm command set compatibility.

Selection Notes

Select this component for designs requiring minimal I/O pin usage due to the single-line UNI/O interface. It is suitable for battery-powered applications given the low standby current consumption. Choose this part over the 11LC variant if operation below 2.5V is required. Consider the SOT-23-3 package constraints for board space limitations.

Part Context

This device belongs to the 11XX family of serial EEPROMs from Microchip Technology. The family includes variants with densities ranging from 1 Kbit to 16 Kbit. The 11AA series specifically supports low-voltage operation down to 1.8V, distinguishing it from the 11LC series which requires a minimum of 2.5V. All members share the same UNI/O protocol and command structure.

Replacement Considerations

The 11AA020T-I/MS serves as a package alternative in MSOP-8 format. The 11LC020T-I/TT is functionally similar but requires a minimum supply voltage of 2.5V. Verify that any substitute maintains the UNI/O interface compatibility and appropriate voltage thresholds for the target application.