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Microchip Technology 11AA02UID-I/SN
- Part No.:
- 11AA02UID-I/SN
- Manufacturer:
- Microchip Technology
- Category:
- Memory
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
11AA02UID-I/SN.pdf
- Description:
- IC EEPROM 2KBIT SGL WIRE 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,109
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Product details
Overview
11AA02UID-I/SN from Microchip Technology is a 2 Kbit (256 × 8) serial EEPROM with preprogrammed 32-bit unique ID, UNI/O® single-I/O interface, 1.8–5.5 V operation, and industrial temperature range (–40°C to +85°C), used for secure device identification in embedded authentication and calibration systems.
For engineers reviewing the 11AA02UID-I/SN datasheet, 11AA02UID-I/SN pinout, 11AA02UID-I/SN application, or 11AA02UID-I/SN equivalent, key selection criteria include its 32-bit factory-programmed UID, Manchester-encoded UNI/O bus compatibility, 16-byte page-write buffer, Schmitt-trigger SCIO input, and block write protection configuration via STATUS register.
Technical Context
The 11AA02UID-I/SN implements a Manchester-encoded, master-controlled UNI/O® bus protocol over a single bidirectional SCIO line, requiring no external clock. It uses internal re-synchronization circuitry to tolerate ±0.50% bus frequency drift per byte and ±0.06 UI edge jitter.
It integrates a 256 × 8-bit EEPROM array with page-write capability (16-byte buffer), STATUS register (WIP/WEL/BP0/BP1), and hardware write protection logic including power-on/off data protection and write-enable latch control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Density | 2 Kbit (256 × 8 organization), enabling compact nonvolatile storage for calibration data or firmware metadata |
| Interface | UNI/O® single I/O bus with Manchester encoding - eliminates dedicated clock line and reduces PCB routing complexity |
| Supply Range | 1.8 V to 5.5 V - supports direct interfacing with 1.8 V, 3.3 V, and 5 V microcontrollers without level shifters |
| Write Speed | Up to 100 kbps bit rate (≈100 kHz clock equivalent) - enables fast UID readout and parameter updates in real-time systems |
| Endurance | 1,000,000 erase/write cycles - ensures long-term reliability in field-updatable devices like smart sensors and IoT nodes |
| Data Retention | >200 years at 25°C - guarantees UID and configuration integrity across product lifecycle without refresh |
| Standby Current | ≤1 µA at 5.5 V / 85°C - minimizes quiescent power in battery-powered asset trackers and wearables |
Pinout & Package
11AA02UID-I/SN is packaged in an 8-lead SOIC (SN) with 1.27 mm pitch, RoHS-compliant, and rated for industrial temperature operation (–40°C to +85°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (VSS) | Ground reference | Common return path for all internal circuitry; must be low-impedance to ensure noise immunity for SCIO signaling |
| 2 (NC) | No connect | Internally unconnected; must remain floating or tied to VSS per layout guidelines to avoid parasitic coupling |
| 3 (NC) | No connect | Internally unconnected; same handling as Pin 2 - no external connection required |
| 4 (SCIO) | Serial Clock/Data I/O | Bidirectional Manchester-encoded bus line - carries clock and data simultaneously; includes Schmitt trigger and slope control |
| 5 (NC) | No connect | Internally unconnected; must not be bonded or routed; leave unpopulated on PCB |
| 6 (NC) | No connect | Internally unconnected; identical functional status to Pins 2 and 3 |
| 7 (NC) | No connect | Internally unconnected; no electrical function - omit from schematic symbol and layout |
| 8 (VCC) | Power supply | Primary supply input (1.8–5.5 V); requires local 0.1 µF ceramic decoupling adjacent to pin |
Key Features
| Feature | Design Value |
|---|---|
| Preprogrammed 32-bit UID | Factory-assigned, globally unique identifier - eliminates need for post-manufacture programming and enables zero-touch provisioning |
| UNI/O® single-I/O interface | Reduces MCU GPIO usage to one pin and removes clock line - ideal for space-constrained MCUs with limited I/O |
| Schmitt-trigger SCIO input | Suppresses noise-induced false edges on shared or long trace buses - improves robustness in electrically noisy industrial environments |
| Page-write buffer (16 bytes) | Enables burst writes within a 16-byte page boundary - cuts write time vs. byte-by-byte by up to 94% for full-page updates |
| Status register (WIP/WEL/BP) | Real-time monitoring of write progress and protection state - allows safe polling without blocking MCU execution |
| Block write protection (0/1/2/all) | Configurable via WRSR command - secures UID region or critical calibration data against accidental overwrite |
Applications
| Secure Device Authentication | Calibration Data Storage |
|---|---|
Use Scenario: Embedded system verifies authenticity of peripheral module (e.g., sensor pod, battery pack) before enabling communication or power delivery. IC Role / Device Role / Timing Role: Provides immutable, factory-programmed 32-bit UID accessed via UNI/O® during boot handshake - serves as cryptographic root-of-trust anchor. Use Value: Prevents counterfeit modules from operating; eliminates need for external secure element or software-based UID generation. |
Use Scenario: Factory calibration data (gain/offset coefficients, temperature compensation curves) stored during production test and retained across power cycles. IC Role / Device Role / Timing Role: Nonvolatile memory holding 256 bytes of precision analog calibration parameters - accessed during system initialization via low-overhead UNI/O® reads. Use Value: Enables high-accuracy analog signal chains without MCU flash wear or external SPI EEPROM footprint. |
| Firmware Version Tracking | Asset Tagging & Traceability |
Use Scenario: Industrial controller logs firmware version, build date, and patch level for each field-upgraded node in a distributed network. IC Role / Device Role / Timing Role: Stores 32-byte ASCII firmware metadata in fixed EEPROM locations - updated only during verified OTA or USB update sequences. Use Value: Supports audit-ready version history and rollback capability without consuming MCU program memory or risking flash corruption. |
Use Scenario: Medical or aerospace equipment requires permanent, tamper-resistant serial number and manufacturing lot code for regulatory compliance and recall tracking. IC Role / Device Role / Timing Role: Host MCU reads preprogrammed 32-bit UID plus user-written 128-bit lot/date fields - both survive 200+ years and 1M write cycles. Use Value: Meets ISO 13485 and AS9100 traceability requirements with zero risk of UID duplication or erasure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar serial EEPROM with unique ID applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 11AA02E48T-I/SN | Same UNI/O® interface and 2 Kbit density, but factory-programmed 48-bit UID instead of 32-bit; otherwise identical timing, voltage, and package | Used where longer UID entropy is required for cryptographic key derivation or hierarchical device addressing | Select when 48-bit uniqueness is mandated by security policy; retains full pin and firmware compatibility |
| AT24C02C-SSHM-T | I²C interface (2-wire), 2 Kbit, no factory UID - requires MCU-side UID generation and storage; higher active current (3 mA vs. 1 mA) | Suitable for cost-sensitive designs where UID is software-managed and I²C bus is already available | Choose only if UNI/O®'s single-pin advantage is unnecessary and existing I²C infrastructure reduces BOM count |
Compared with 11AA02E48T-I/SN, the 11AA02UID-I/SN offers shorter UID length but identical reliability and integration; versus AT24C02C-SSHM-T, it delivers true hardware-rooted identity and lower power, at the cost of interface-specific firmware support.
Availability
11AA02UID-I/SN is available at Aetrix Electronics and suitable for secure authentication, calibration data storage, and firmware version tracking requiring stable component supply, long-term obsolescence management, and guaranteed UID uniqueness across production lots.
Supply support for 11AA02UID-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, with emphasis on embedded control and secure connectivity.
The 11AA02UID-I/SN belongs to Microchip's UNI/O® EEPROM family, designed specifically for ultra-low-pin-count, secure identification and configuration storage in resource-constrained embedded systems.
FAQ
What is the factory-programmed UID length for the 11AA02UID-I/SN?
The 11AA02UID-I/SN features a factory-programmed 32-bit unique serial number, guaranteed unique across all UID-family EEPROMs from Microchip. This UID is laser-programmed during wafer sort and cannot be altered in-system. The 11AA02UID-I/SN does not support field-programmable UID extension beyond 32 bits without external logic.
Does the 11AA02UID-I/SN require external pull-up resistors on the SCIO line?
No, the 11AA02UID-I/SN does not require external pull-up resistors on the SCIO line. Its internal current-limited slope-controlled output driver and Schmitt-trigger input eliminate the need for external biasing components. External pull-ups may interfere with Manchester encoding timing and are explicitly discouraged in Microchip's design guidelines for the 11AA02UID-I/SN.
Can the 11AA02UID-I/SN operate reliably at 1.8 V supply voltage?
Yes, the 11AA02UID-I/SN is fully specified for operation down to 1.8 V, with validated DC and AC characteristics including 100 kbps bit rate, 1 µA standby current, and proper Schmitt-trigger hysteresis. At 1.8 V, the device maintains full functionality across the –20°C to +85°C sub-range of the industrial temperature grade.
How is write protection configured on the 11AA02UID-I/SN?
Write protection on the 11AA02UID-I/SN is configured via the STATUS register's BP0 and BP1 bits using the WRSR command. These nonvolatile bits enable four protection modes: none, upper 1/4 (C0h–FFh), upper 1/2 (80h–FFh), or full array (00h–FFh). The 11AA02UID-I/SN applies protection immediately after WRSR completion and retains settings through power cycles.
What is the maximum write cycle time for a full page on the 11AA02UID-I/SN?
The maximum write cycle time for a full 16-byte page on the 11AA02UID-I/SN is 10 ms, as specified for ERAL and SETAL commands. For standard page writes (up to 16 bytes), the typical TWC is 5 ms, with worst-case 10 ms under 5.5 V and 85°C conditions. The 11AA02UID-I/SN automatically handles erase-before-write and internal timing - no external delay is required beyond the NoMAK-initiated cycle.
11AA02UID-I/SN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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
11AA02UID-I/SN FAQ
1.How can I place an order for 11AA02UID-I/SN through Aetrix?
Please submit a Request for Quotation (RFQ) for 11AA02UID-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 11AA02UID-I/SN reliable?
The price and inventory of 11AA02UID-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 11AA02UID-I/SN is usually 5 days.
3.What payment methods are accepted for 11AA02UID-I/SN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 11AA02UID-I/SN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 11AA02UID-I/SN?
11AA02UID-I/SN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 11AA02UID-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 11AA02UID-I/SN?
For technical support, including 11AA02UID-I/SN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 11AA02UID-I/SN requirements.
6.How does Aetrix verify that 11AA02UID-I/SN is sourced from the original manufacturer or authorized distributors?
All 11AA02UID-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 11AA02UID-I/SN meets industry standards.
7.What is the process for return or replacement of 11AA02UID-I/SN?
All 11AA02UID-I/SN units undergo pre-shipment inspection (PSI). If there is an issue with 11AA02UID-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 11AA02UID-I/SN part is unused and in its original packaging.
Return procedure for 11AA02UID-I/SN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
11AA02UID-I/SN Tags
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M24C02-WMN6TP
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AT24C02C-XHM-T
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AT21CS01-STUM10-T
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93LC46BT-I/OT
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