11AA02E64T-I/SN

Overview

The Microchip Technology 11AA02E64T-I/SN is a 2 Kbit Serial Electrically Erasable PROM organized in 256 x 8-bit blocks. It features a single I/O UNI/O serial interface bus and operates within a supply voltage range of 1.8V to 5.5V. The device supports a maximum bit rate of 100 kbps, equivalent to a 100 kHz clock frequency. It includes preprogrammed globally unique 64-bit node addresses compatible with EUI-64 standards. The component is housed in an 8-lead SOIC package and is rated for industrial temperature ranges from -40°C to +85°C.

Feature Summary

• Supports the patented UNI/O single I/O serial bus protocol using Manchester encoding for combined clock and data transmission.
• Includes built-in write protection mechanisms such as power-on/off data protection circuitry and a configurable write enable latch.
• Features Schmitt trigger inputs for noise suppression and output slope control to eliminate ground bounce.
• Provides block write protection allowing users to protect none, one-quarter, one-half, or all of the memory array.

Applications

• Interfacing with microcontrollers requiring a discrete I/O line for serial communication
• ASIC applications utilizing the UNI/O protocol for low-pin-count connectivity
• Systems requiring globally unique node identification via preprogrammed EUI-64 addresses

Procurement Notes

Verify that the specific suffix 'T' corresponds to the requested packaging configuration, as datasheet documentation primarily references standard tube packaging for the SN variant. Confirm the industrial temperature grade (-40°C to +85°C) aligns with environmental requirements. Ensure the host controller supports the UNI/O protocol timing constraints, including start headers and acknowledge sequences, for proper operation.

Selection Notes

Select this component when a single-wire serial interface is required to minimize pin count on the PCB. It is suitable for applications needing non-volatile storage with high endurance and long data retention. The preprogrammed unique address simplifies system integration where device identity is critical. Consider the page-write buffer capability if sequential data writing efficiency is a priority.

Part Context

This device belongs to the 11AA02EXX family of 2 Kbit UNI/O Serial EEPROMs. It shares architectural similarities with the 11AA02E48 but differs in its preprogrammed node address length, offering a 64-bit EUI-64 identifier instead of 48-bit. Both variants utilize the same low-power CMOS technology and interface protocols, differing primarily in their factory-programmed identity codes.

Replacement Considerations

The 11AA02E48 is a functional substitute within the same family, differing only in the length of the preprogrammed node address (48-bit vs. 64-bit). Other 11AA02EXX variants may be considered if address uniqueness is not required. Verify that any replacement maintains compatibility with the UNI/O bus timing and voltage specifications.