11AA080-I/SN

Overview

The Microchip Technology 11AA080-I/SN is an 8 Kbit (1,024 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 kHz. The device features a 16-byte page-write buffer and self-timed write cycles with a typical duration of 5 ms. Designed for industrial applications, it functions reliably across a temperature range of -40°C to +85°C and is housed in an 8-lead SOIC package.

Feature Summary

• Supports the patented UNI/O single I/O serial protocol using Manchester encoding on the SCIO pin
• Includes built-in power-on/off data protection and a write enable latch for array security
• Features Schmitt trigger inputs on the SCIO line to suppress noise interference
• Provides output slope control to eliminate ground bounce during signal transitions

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Parameter logging in low-pin-count sensors
• Device identification and tracking information storage

Procurement Notes

Verify that the specific part number suffix matches the required package type and temperature grade. Confirm that the design utilizes a microcontroller or master device capable of generating the UNI/O Manchester encoded protocol. Ensure the supply voltage remains within the specified 1.8 V to 5.5 V operational range for reliable performance.

Selection Notes

Select this component when a single I/O interface is required to minimize pin count compared to standard SPI or I2C memories. It is suitable for applications needing moderate density with robust write protection features. Consider the 16-byte page buffer size for write efficiency and verify compatibility with the host controller's ability to handle the specific timing requirements of the UNI/O bus.

Part Context

This device belongs to the 11AAXXX/11LCXXX family of serial EEPROMs from Microchip Technology. While functionally similar to the 11LC080, the 11AA variant supports lower voltage operation down to 1.8 V. The family shares common command sets and physical interfaces, differing primarily in voltage specifications and availability across various package types including SOIC, PDIP, and MSOP.

Replacement Considerations

The 11LC080 serves as a direct functional substitute if the application requires a minimum supply voltage of 2.5 V instead of 1.8 V. Other members of the 11XX family may be considered if different memory densities are acceptable.