11AA020-I/SN

Overview

The Microchip Technology 11AA020-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 clock frequency of 100 kHz. The device is housed in an 8-lead SOIC package and functions reliably across 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, a write enable latch, and configurable block write protection.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce during operation.

Applications

• Interfacing with microcontrollers or ASICs via discrete I/O lines configured for the UNI/O protocol
• Low-power embedded systems requiring non-volatile data storage
• Industrial applications operating within specified temperature and voltage ranges

Procurement Notes

Verify that the ordering suffix 'SN' corresponds to the 8-lead SOIC package type required for your design. Confirm the 'I' suffix indicates the Industrial temperature range (-40°C to +85°C). Ensure the component is sourced from authorized distributors to guarantee authenticity and compliance with RoHS standards.

Selection Notes

Select this part when a single-wire serial interface is preferred to minimize pin count compared to standard SPI or I2C devices. It is suitable for applications requiring low standby current and robust write protection features without the complexity of multi-line buses.

Part Context

This component belongs to the 11AAXXX/11LCXXX family of serial EEPROMs, which offers densities ranging from 1 Kbit to 16 Kbit. The 11AA series specifically supports low-voltage operation down to 1.8 V, distinguishing it from the 11LC series which typically requires higher minimum voltages.

Replacement Considerations

The 11AA020T-I/TTOffering a SOT-23 package alternative. Other family members like the 11AA010 or 11AA040 provide different memory densities but share the same interface and electrical characteristics.