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Microchip Technology 11AA02E48T-I/SN
- Part No.:
- 11AA02E48T-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11AA02E48T-I/SN.pdf
- Description:
- IC EEPROM 2KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,182
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Product details
Overview
11AA02E48T-I/SN 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-grade operation from -40°C to +85°C. It delivers 1 µA standby current, 100 kbps bit rate, and 1,000,000 write cycles for embedded identity storage in networked sensors and IoT edge nodes.
For engineers reviewing the 11AA02E48T-I/SN datasheet, 11AA02E48T-I/SN pinout, 11AA02E48T-I/SN application, or 11AA02E48T-I/SN equivalent, key selection criteria include EUI-48™ uniqueness, UNI/O® bus compatibility with resource-constrained MCUs, 1.8V–5.5V supply range, Schmitt-trigger noise immunity on SCIO, and block-level write protection for secure configuration storage.
Technical Context
The 11AA02E48T-I/SN implements Manchester-encoded UNI/O® protocol over a single bidirectional SCIO line, eliminating need for separate clock lines and reducing MCU pin count. Its internal re-synchronization circuitry tolerates ±0.50% frequency drift per byte and ±0.06 UI input edge jitter, enabling robust communication across voltage/temperature variations.
It integrates a STATUS register with WIP and WEL bits, 4-level block write protection (BP0/BP1), and auto-erase during self-timed write cycles. The 256 × 8-bit array supports random and sequential reads via an incrementing address pointer, with page-write buffering limited to 16-byte boundaries aligned to 0x00–0x0F, 0x10–0x1F, etc.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 2 Kbit (256 × 8-bit organization) - fits compact firmware ID or calibration data without over-provisioning memory. |
| Interface | UNI/O® single I/O bus with Manchester encoding - eliminates dedicated clock pin and simplifies PCB routing on space-constrained boards. |
| Node Address | EUI-48™ (48-bit globally unique) - enables IEEE-compliant MAC address assignment for Ethernet/Wi-Fi/Bluetooth modules without external programming. |
| Supply Range | 1.8V to 5.5V - interoperable with both low-voltage microcontrollers (e.g., PIC12LF, SAMD21) and 3.3V/5V legacy systems. |
| Write Endurance | 1,000,000 erase/write cycles - supports frequent field-updatable parameters in industrial logging or metering applications. |
| Data Retention | >200 years - ensures long-term validity of device identity and calibration constants across product lifecycle. |
| Package | 3-lead SOT-23 (TT) - ultra-small footprint ideal for wearables, sensor tags, and miniaturized medical devices. |
Pinout & Package
11AA02E48T-I/SN uses a 3-lead SOT-23 package (TT suffix), optimized for minimal board area and high-volume automated assembly. Pin functions are validated per Microchip DS20002122E, Figure 1-1 and Pin Function Table.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SCIO | Serial Clock/Data I/O | Bidirectional Manchester-encoded bus line - carries clock and data simultaneously; includes Schmitt trigger and slope control to suppress ground bounce and EMI. |
| VSS | Ground | Reference return path for all internal logic and EEPROM operations; must be low-impedance to maintain timing integrity during write cycles. |
| VCC | Supply Voltage | Power input (1.8V–5.5V); powers internal HV generator for EEPROM programming and supports dynamic current scaling from 1 µA standby to 5 mA write peak. |
Key Features
| Feature | Design Value |
|---|---|
| EUI-48™ preprogramming | Factory-programmed globally unique 48-bit identifier - eliminates post-manufacturing MAC address provisioning and reduces firmware complexity. |
| UNI/O® protocol compliance | Single-pin serial interface with built-in re-synchronization - enables reliable communication with any GPIO-capable MCU, including PIC, ARM Cortex-M0+, and RISC-V cores. |
| Page-write buffer (16 bytes) | Reduces write transaction overhead by up to 16× vs. byte-wise writes - critical for minimizing bus occupancy in multi-drop UNI/O® networks. |
| Status register (WIP/WEL/BP) | Real-time visibility into write progress and protection state - allows host MCU to poll WIP bit instead of fixed delays, improving system responsiveness. |
| Block write protection (BP0/BP1) | Hardware-enforced partitioning of memory into unprotected, upper-1/4, upper-1/2, or full-array lock - prevents accidental overwrite of critical identity or calibration sectors. |
Applications
| Networked Sensor Node Identity | IoT Edge Device MAC Storage |
|---|---|
|
Use Scenario: A battery-powered environmental sensor node requires unique, immutable network identity for zero-touch onboarding into LoRaWAN or NB-IoT gateways. IC Role / Device Role / Timing Role: Stores factory-assigned EUI-48™ address and validates read integrity during boot; accessed only at startup or firmware update. Use Value: Eliminates need for external MAC address programming step and guarantees IEEE 802 compliance without MCU-side address management logic. |
Use Scenario: A smart home hub embeds multiple wireless radios (Wi-Fi, Bluetooth LE, Zigbee) and must assign distinct MAC addresses to each interface. IC Role / Device Role / Timing Role: Provides four independent EUI-48™ addresses stored in separate memory regions; accessed sequentially during radio initialization. Use Value: Enables single-hardware SKU for multi-radio products while meeting regulatory MAC uniqueness requirements across all interfaces. |
| Industrial PLC Configuration Lock | Medical Device Calibration Vault |
|
Use Scenario: A programmable logic controller stores user-defined I/O mapping tables and retains them across power cycles and firmware updates. IC Role / Device Role / Timing Role: Holds nonvolatile configuration data protected by BP1/BP0 bits; write-enabled only during authorized setup mode. Use Value: Prevents corruption of safety-critical I/O assignments during field maintenance or brownout events using hardware-level write blocking. |
Use Scenario: A portable glucose monitor stores factory-calibrated ADC offset/gain coefficients and must guarantee data integrity over 10+ years of use. IC Role / Device Role / Timing Role: Retains calibration constants with >200-year data retention; accessed once per measurement cycle via fast UNI/O® read. Use Value: Meets ISO 13485 traceability requirements without requiring periodic recalibration or external backup power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM with unique node identity applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11AA02E64T-I/SN | Same UNI/O® interface and package, but preprogrammed with EUI-64™ (64-bit) address instead of EUI-48™. | Required where IEEE 1394, IPv6 autoconfiguration, or 64-bit MAC formats are mandated - not interchangeable for EUI-48™-only systems. | Select 11AA02E64T-I/SN only if full EUI-64™ namespace is needed; otherwise 11AA02E48T-I/SN provides optimal fit for Ethernet/Wi-Fi MAC use cases. |
| AT24C02C-SSHM-T | I²C interface (2-wire), no factory-programmed node address, 1 MHz max clock, SOIC-8 package only. | Lacks EUI identity; requires MCU-side address management and additional PCB routing for SCL/SDA lines. | Choose only when existing I²C infrastructure exists and EUI-48™ is not required; does not support UNI/O®-only designs or SOT-23 space constraints. |
Compared with 11AA02E64T-I/SN, the 11AA02E48T-I/SN offers precise EUI-48™ alignment for legacy MAC protocols, while AT24C02C-SSHM-T trades identity capability and pin efficiency for broader I²C ecosystem compatibility - neither is pin- or functionally compatible with 11AA02E48T-I/SN.
Availability
11AA02E48T-I/SN is available at Aetrix Electronics and suitable for industrial sensor nodes, IoT edge gateways, and medical diagnostics equipment requiring stable component supply, long-lifecycle support, and guaranteed EUI-48™ uniqueness.
Supply support for 11AA02E48T-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 U.S.-based semiconductor company specializing in microcontrollers, analog devices, and memory solutions for embedded control applications.
The 11AA02E48T-I/SN belongs to Microchip's UNI/O® EEPROM family, designed specifically to simplify device identification and secure configuration storage in resource-constrained, cost-sensitive edge electronics.
FAQ
What is the exact node address format programmed into the 11AA02E48T-I/SN?
The 11AA02E48T-I/SN is factory-programmed with a globally unique 48-bit Extended Unique Identifier (EUI-48™) compliant with IEEE Std 802-2014. This address occupies the last six bytes of the 256-byte memory array and is read-only; it cannot be altered in the field. The 11AA02E48T-I/SN does not support EUI-64™ or user-programmable identity.
Does the 11AA02E48T-I/SN support standard I²C or SPI communication?
No, the 11AA02E48T-I/SN exclusively supports the proprietary UNI/O® serial bus protocol over a single bidirectional SCIO line. It is incompatible with I²C, SPI, or Microwire interfaces. Communication requires a UNI/O®-capable master - such as Microchip's PIC microcontrollers with dedicated UNI/O® firmware libraries - or bit-banged GPIO implementation per DS20002122E timing specifications.
How is write protection implemented on the 11AA02E48T-I/SN?
Write protection on the 11AA02E48T-I/SN is controlled by two nonvolatile BP0 and BP1 bits in the STATUS register, set via 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 hardware-enforced and persists through power cycles; it cannot be overridden by software without first clearing the bits via WRSR.
What is the maximum write speed and timing behavior of the 11AA02E48T-I/SN?
The 11AA02E48T-I/SN supports a maximum UNI/O® bus frequency of 100 kHz (100 kbps), with typical write cycle time of 5 ms for byte or page writes. Write operations are self-timed and include automatic erase; the WIP bit in the STATUS register must be polled to confirm completion. No external timing control or wait states are required beyond monitoring WIP.
Can the 11AA02E48T-I/SN operate reliably below 1.8V?
No, the 11AA02E48T-I/SN has a specified minimum operating voltage of 1.8V per DS20002122E. Operation below this threshold may result in incomplete writes, corrupted reads, or failure to recognize START headers. The device includes built-in power-on/off protection circuitry, but this does not extend functionality below the rated VCC range.
11AA02E48T-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Memory Type:
- Non-Volatile
- Memory Format:
- EEPROM
- Technology:
- EEPROM
- Memory Size:
- 2Kbit
- Memory Organization:
- 256 x 8
- Memory Interface:
- Single Wire
- Clock Frequency:
- 100 kHz
- Write Cycle Time - Word, Page:
- 5ms
- Access Time:
- -
- Voltage - Supply:
- 1.8V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
11AA02E48T-I/SN FAQ
1.How can I place an order for 11AA02E48T-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11AA02E48T-I/SN on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 11AA02E48T-I/SN reliable?
The price and inventory of 11AA02E48T-I/SN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 11AA02E48T-I/SN is usually 5 days.
3.What payment methods are accepted for 11AA02E48T-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11AA02E48T-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11AA02E48T-I/SN?
11AA02E48T-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11AA02E48T-I/SN order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 11AA02E48T-I/SN?
For technical support, including 11AA02E48T-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11AA02E48T-I/SN requirements.
6.How does Aetrix verify that 11AA02E48T-I/SN is sourced from the original manufacturer or authorized distributors?
All 11AA02E48T-I/SN products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 11AA02E48T-I/SN meets industry standards.
7.What is the process for return or replacement of 11AA02E48T-I/SN?
All 11AA02E48T-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11AA02E48T-I/SN, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 11AA02E48T-I/SN part is unused and in its original packaging.
Return procedure for 11AA02E48T-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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