Microchip Technology 11AA02E64T-I/SN

Overview

11AA02E64T-I/SN from Microchip Technology Inc. is a 2 Kbit serial EEPROM with preprogrammed globally unique 64-bit EUI-64™ node address, UNI/O® single I/O serial interface, 256 × 8-bit memory organization, and industrial temperature range (–40°C to +85°C). It delivers low-power operation (1 µA standby, 1 mA active), Schmitt-trigger inputs, slope-controlled output, and 100 kbps bit rate for embedded identity and configuration storage in space-constrained systems.

For engineers reviewing the 11AA02E64T-I/SN datasheet, 11AA02E64T-I/SN pinout, 11AA02E64T-I/SN application, or 11AA02E64T-I/SN equivalent, this page provides verified technical context, pin-level design meaning, real-world use scenarios, and validated alternative options for secure node identification and nonvolatile parameter storage in IoT edge nodes, industrial sensors, and medical devices.

Technical Context

The 11AA02E64T-I/SN implements Manchester-encoded UNI/O® protocol over a single SCIO line, eliminating need for separate clock and data lines. Its internal block diagram includes EEPROM array, page latches, STATUS register, HV generator, and current-limited slope-controlled I/O driver - enabling noise-immune communication at 10–100 kHz bus frequency with automatic re-synchronization on MAK edges.

It operates across 1.8V–5.5V supply, supports page-write buffering (up to 16 bytes), self-timed write cycles (≤5 ms per byte/page), and features dual-layer write protection: hardware-based (BP0/BP1 bits controlling 0%, 25%, 50%, or 100% array lock) and power-cycle-safe latch control (WREN/WRDI commands).

Key Specifications

Pinout & Package

11AA02E64T-I/SN is packaged in 3-lead SOT-23 (TT) and 8-lead SOIC (SN); the /SN suffix confirms SOIC-8 package. Pin functions are validated per DS20002122E-page 1 and page 5: SCIO serves as bidirectional Manchester-encoded serial I/O, VCC supplies 1.8–5.5V, and VSS is ground reference.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar serial EEPROM with node identity applications.

Compared with AT24C02C-SSHM-T and 93LC46B-I/P, the 11AA02E64T-I/SN uniquely integrates factory-programmed EUI-64™, single-pin UNI/O® bus, and STATUS-register-based write protection - making it the only option that satisfies IEEE 802.1AR device identity and ultra-low-pin-count constraints simultaneously.

Availability

11AA02E64T-I/SN is available at Aetrix Electronics and suitable for industrial sensor nodes, medical calibration storage, and automotive telematics modules requiring stable component supply, long-life data retention, and globally unique hardware identity.

Supply support for 11AA02E64T-I/SN includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microchip Technology Inc. is a leading provider of microcontrollers, analog components, and memory solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The 11AA02E64T-I/SN belongs to Microchip's UNI/O® serial EEPROM family, designed specifically for secure, low-pin-count node identity and configuration storage in resource-constrained embedded systems.

FAQ

What is the primary function of the 11AA02E64T-I/SN?

The 11AA02E64T-I/SN is a 2 Kbit serial EEPROM with a factory-programmed EUI-64™ node address and UNI/O® single I/O interface. Its primary function is to provide secure, globally unique hardware identity and reliable nonvolatile storage for calibration data, configuration parameters, or security keys in space- and pin-constrained embedded systems. The 11AA02E64T-I/SN achieves this with low-power operation (1 µA standby), robust noise immunity, and integrated write protection.

Does the 11AA02E64T-I/SN require external components for basic operation?

No, the 11AA02E64T-I/SN operates with only VCC, VSS, and SCIO connections - no external pull-up resistors, capacitors, or level shifters are required. Its Schmitt-trigger inputs and slope-controlled output eliminate need for external filtering or termination. The 11AA02E64T-I/SN draws just 1 µA in standby and communicates at up to 100 kbps over the single SCIO line using Manchester encoding.

How does the 11AA02E64T-I/SN ensure data integrity during writes?

The 11AA02E64T-I/SN ensures data integrity through multiple mechanisms: self-timed write cycles (including auto-erase), a STATUS register with Write-In-Progress (WIP) bit for polling, and dual-layer write protection (WREN latch + BP0/BP1 bits). It also features >4,000V ESD protection and >200-year data retention. These features collectively prevent partial writes, accidental overwrites, and corruption due to power loss - all verified in the 11AA02E64T-I/SN datasheet DS20002122E.

Can the EUI-64™ address in the 11AA02E64T-I/SN be modified or erased?

No, the EUI-64™ address in the 11AA02E64T-I/SN is factory-programmed into ROM and cannot be modified, erased, or rewritten by the user. It is permanently stored in a dedicated memory region outside the 256 × 8-bit user-accessible EEPROM array. This immutability ensures cryptographic binding between hardware identity and device firmware - a key requirement for IEEE 802.1AR-compliant secure boot and device attestation workflows using the 11AA02E64T-I/SN.

What package type does the '/SN' suffix indicate for the 11AA02E64T-I/SN?

The '/SN' suffix in 11AA02E64T-I/SN specifies the 8-lead SOIC (Small Outline Integrated Circuit) package, measuring 3.9 mm × 4.9 mm with 1.27 mm lead pitch. This is distinct from the '/TT' variant (3-lead SOT-23). The SOIC-8 package provides mechanical stability, standard reflow compatibility, and ease of inspection - making the 11AA02E64T-I/SN suitable for automated assembly in industrial and medical-grade production environments.