Microchip Technology 11AA02E48T-I/TT

Overview

11AA02E48T-I/TT from Microchip Technology Inc. is a 2 Kbit serial EEPROM with preprogrammed EUI-48™ node address, UNI/O® single-I/O interface, 16-byte page buffer, and industrial temperature range (–40°C to +85°C). It operates from 1.8V to 5.5V, supports Manchester-encoded serial communication, and embeds unique network identity for embedded device identification in IoT sensor nodes and industrial controllers.

For engineers reviewing the 11AA02E48T-I/TT datasheet, 11AA02E48T-I/TT pinout, 11AA02E48T-I/TT application, or 11AA02E48T-I/TT equivalent, key selection considerations include its 3-lead SOT-23 package, 100 kbps UNI/O® bus timing, Schmitt-trigger SCIO input, write-protection granularity (none/1/4/1/2/all), and self-timed 5 ms write cycle with auto-erase.

Technical Context

The 11AA02E48T-I/TT implements a Manchester-encoded, master-controlled UNI/O® bus protocol using a single bidirectional SCIO line. Its internal architecture includes a status register with WIP and WEL bits, a 16-byte page-write buffer, and block protection logic controlled by BP0/BP1 bits.

It features slope-controlled SCIO output to suppress ground bounce, Schmitt-trigger input for noise immunity, and re-synchronization circuitry tolerant of ±0.50% frequency drift per byte and ±0.06 UI edge jitter - enabling robust operation in electrically noisy industrial environments with microcontroller GPIO-based masters.

Key Specifications

Pinout & Package

Package: 3-lead SOT-23 (TT suffix), RoHS-compliant, industrial temperature range (–40°C to +85°C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 11AA02E64T-I/TT, the 11AA02E48T-I/TT delivers identical performance with EUI-48™ addressing optimized for legacy MAC layers; versus 24AA02E48T-I/OT, it trades I²C compatibility for single-GPIO simplicity and SOT-23 footprint reduction - critical in miniaturized medical and sensor designs.

Availability

11AA02E48T-I/TT is available at Aetrix Electronics and suitable for industrial sensor nodes, IoT edge devices, and medical instrumentation requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for 11AA02E48T-I/TT 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 11AA02E48T-I/TT belongs to Microchip's UNI/O® EEPROM family, designed specifically for ultra-low-pin-count embedded systems needing guaranteed-unique network identity and minimal board space - targeting sensor, metering, and portable medical applications.

FAQ

What is the primary interface protocol used by the 11AA02E48T-I/TT?

The 11AA02E48T-I/TT uses the UNI/O® single-I/O serial bus protocol with Manchester encoding. This allows bidirectional clock and data transmission over a single SCIO line, eliminating the need for separate clock and data lines. The protocol is master-controlled and compatible with standard GPIO pins on microcontrollers, making the 11AA02E48T-I/TT ideal for pin-constrained designs where minimizing interconnect is critical.

Does the 11AA02E48T-I/TT require external pull-up resistors on the SCIO line?

No, the 11AA02E48T-I/TT does not require external pull-up resistors on the SCIO line. Its internal architecture includes active drive capability and slope control for both high and low states, enabling reliable communication without external biasing. This simplifies schematic design and reduces BOM count - a key advantage confirmed in the DS20002122E datasheet Section 3.5 and Figure 2-1 block diagram.

How is write protection configured on the 11AA02E48T-I/TT?

Write protection on the 11AA02E48T-I/TT is configured via the STATUS register's BP0 and BP1 bits, set using the WRSR instruction. These bits enable four protection modes: no protection (00), upper 1/4 (01), upper 1/2 (10), or full array (11). Protection is nonvolatile and persists across power cycles. The 11AA02E48T-I/TT also includes built-in power-on/off data protection and a write-enable latch that must be set via WREN before any write - providing layered security against accidental writes.

What is the maximum bit rate supported by the 11AA02E48T-I/TT, and how is timing enforced?

The 11AA02E48T-I/TT supports a maximum bit rate of 100 kbps, equivalent to a 100 kHz clock frequency. Timing is enforced through Manchester-encoded start headers and continuous re-synchronization on each MAK bit. The device tolerates ±0.50% frequency drift per byte and ±0.06 UI edge jitter, ensuring robust communication even with imprecise MCU timing sources - as specified in Table 1-2 AC Characteristics and Section 3.8 of the DS20002122E datasheet.

Can the 11AA02E48T-I/TT be used in battery-powered applications with strict current budgets?

Yes, the 11AA02E48T-I/TT is optimized for ultra-low-power operation: standby current is ≤1 µA at 5.5V/85°C, and active read current is ≤1 mA at 2.5V. Its 1.8V minimum operating voltage enables direct integration with coin-cell or energy-harvesting supplies. Combined with self-timed writes and no external timing components, the 11AA02E48T-I/TT delivers predictable, minimal power consumption - validated in DC Characteristics Table 1-1 (D11, D9) and Functional Description Section 2.1.