11AA080-I/TO

Overview

The Microchip Technology 11AA080-I/TO is an 8 Kbit (1,024 x 8) serial electrically erasable PROM 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 industrial temperature grades from -40°C to +85°C. The device features a maximum bit rate of 100 kbps, typical active current of 1 mA, and standby current of 1 µA. It includes 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 combined clock and data transmission on the SCIO pin.
• Includes built-in power-on/off data protection circuitry and a write enable latch to prevent unintended memory modifications.
• Features configurable block write protection allowing selection of none, one-quarter, one-half, or all array segments.
• Provides high reliability with 1,000,000 erase/write cycle endurance and greater than 200 years of data retention.

Applications

• Microcontroller systems requiring low-pin-count non-volatile storage
• Industrial control devices needing robust data retention
• Battery-powered applications benefiting from ultra-low standby current

Procurement Notes

Verify that the TO-92 package suffix matches the required form factor for through-hole mounting. Confirm the 'I' designation corresponds to the industrial temperature range (-40°C to +85°C). Ensure the specific density variant (080 for 8Kbit) aligns with system memory requirements. Check datasheet specifications for electrical characteristics at the intended operating voltage.

Selection Notes

Select this component when a single-wire serial interface is preferred to minimize PCB trace count. The 1.8V minimum operating voltage makes it suitable for low-power portable electronics. Consider the 16-byte page buffer size for write efficiency. Verify compatibility with the master controller's ability to generate the required UNI/O Manchester encoded signals.

Part Context

This device belongs to the 11XX family of 1 Kbit to 16 Kbit serial EEPROMs manufactured by Microchip Technology. The family shares common architectural features including the UNI/O interface and similar command sets, differing primarily in memory density and voltage ranges between the AA and LC series variants.

Replacement Considerations

Direct substitutes include other 11AA080 variants such as 11AA080-I/P or 11AA080-I/SN, provided the package type change is acceptable. Cross-family replacements like 11LC080 require verification of the 2.5V minimum voltage constraint.