11AA040T-I/MNY

Overview

The Microchip Technology 11AA040T-I/MNY is a 4 Kbit serial electrically erasable programmable read-only memory (EEPROM) organized as 512 x 8 bits. It utilizes the UNI/O single I/O bus interface and operates within a supply voltage range of 1.8 V to 5.5 V. The device supports a maximum serial bus frequency of 100 kHz and features a 16-byte page-write buffer. It is housed in an SOT-23-3 package and is rated for industrial temperature operation from -40°C to +85°C.

Feature Summary

• Supports the UNI/O single I/O serial bus protocol using Manchester encoding on the SCIO pin
• Includes a 16-byte page-write buffer for efficient data writing operations
• Features built-in write protection with power-on/off data protection circuitry and a write enable latch
• Provides block write protection allowing configuration to protect none, one-quarter, one-half, or all of the memory array

Applications

• Microcontroller system configuration storage
• Calibration data retention in embedded devices
• Parameter logging in low-pin-count applications
• Device identification and security code storage

Procurement Notes

Verify that the ordering suffix 'I' corresponds to the Industrial temperature range (-40°C to +85°C) and 'MNY' denotes the SOT-23-3 package. Confirm that the 'T' indicates tape-and-reel packaging if bulk quantities are required. Ensure the design accommodates the 1.8 V minimum operating voltage for the AA series. Cross-reference the datasheet revision to confirm command set compatibility.

Selection Notes

Select this component when a single I/O interface is required to minimize microcontroller pin usage. The 11AA040 offers lower voltage operation starting at 1.8 V compared to the LC series which starts at 2.5 V. The SOT-23-3 package provides a compact footprint suitable for space-constrained designs. Consider the 100 kHz bus speed limitation when determining system throughput requirements.

Part Context

This part belongs to the 11XX family of UNI/O serial EEPROMs manufactured by 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 1.8 V, whereas the 11LC series requires a minimum of 2.5 V. Both series share identical functional interfaces and command sets.

Replacement Considerations

The 11LC040T-I/MNY serves as a direct functional substitute with identical pinout and commands, though it requires a minimum supply voltage of 2.5 V instead of 1.8 V.