25AA02UIDT-I/OT Microchip Integrated Circuit (SOT23 (6-Pin)) In Stock
The Microchip 25AA02UIDT-I/OT is a 2 Kbit SPI-compatible serial EEPROM in a 6-pin SOT-23 package, offering up to 10 MHz clock frequency, 1,000,000 write/erase cycle endurance, and a minimum 200-year data retention time. It operates from 1.8 V to 4.5 V and includes a factory-programmable 64-bit unique identifier for device authentication and tracking. Lead-free tape-and-reel packaging suits automated SMT production.
- Manufacturer
- Microchip
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- 25AA02UIDT-I/OT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3490(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 25AA02UIDT-I/OT?
- 2 Kbit (256-byte) SPI EEPROM with factory-programmable 64-bit unique identifier enabling secure device authentication and asset tracking
- Wide supply voltage range from 1.8 V to 4.5 V with up to 10 MHz SPI clock supports both low-power 1.8 V and standard 3.3 V / 5 V microcontroller systems
- 1,000,000 write/erase cycle endurance with minimum 200-year data retention ensures reliable parameter storage over the product lifetime
- Compact 6-pin SOT-23 package minimizes PCB footprint for small-memory applications in space-constrained IoT and wearable designs
- Lead-free e3 JESD-609 compliant packaging in tape-and-reel format for high-volume automated PCB assembly
What is 25AA02UIDT-I/OT used for?
The 25AA02UIDT-I/OT is used in IoT sensor nodes, smart meters, and wearable devices where a small amount of non-volatile parameter storage is needed alongside a factory-programmed 64-bit unique ID for device tracking or secure pairing. Its 1.8 V minimum operating voltage makes it well suited for energy-harvesting systems and coin-cell-powered devices where minimizing supply rail voltage is essential. Industrial equipment manufacturers also use this EEPROM to store calibration constants, serial numbers, and configuration data in 3.3 V and 5 V embedded microcontroller designs.
What are the specifications of 25AA02UIDT-I/OT?
| Manufacturer Package Code | SOT-23-6 |
| Factory Lead Time | 6Weeks |
| YTEOL | 13 |
| Additional Feature | 2.5V TO 4.5V @ 5MHz AND 1.8V TO 2.5V @ 3MHz |
| Clock Frequency-Max (fCLK) | 10MHz |
| Data Retention Time-Min | 200 |
| Endurance | 1000000 Write/Erase Cycles |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e3 |
| Memory Density | 2048bit |
| Memory IC Type | EEPROM |
| Memory Width | 8 |
| Number of Functions | 1 |
| Number of Ports | 1 |
| Number of Words | 256words |
| Number of Words Code | 256 |
| Operating Mode | SYNCHRONOUS |
| Organization | 256X8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Parallel/Serial | SERIAL |
| Peak Reflow Temperature (Cel) | 260 |
| Programming Voltage | 5V |
| Screening Level | TS 16949 |
| Serial Bus Type | SPI |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| Write Cycle Time-Max (tWC) | 5ms |
| Write Protection | HARDWARE |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.32.00.51 |
| Country of Origin | Thailand |
Where can I find the 25AA02UIDT-I/OT datasheet?
25AA02UIDT-I/OT Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for 25AA02UIDT-I/OT?
Compatible alternatives and drop-in replacements for 25AA02UIDT-I/OT:
Frequently Asked Questions
How does the factory-programmed 64-bit unique ID in 25AA02UIDT-I/OT simplify device authentication in IoT deployments?
The 25AA02UIDT-I/OT stores a laser-programmed 64-bit unique identifier in a read-only region of its 2 Kbit EEPROM array that cannot be overwritten during field use. This ID can be read over SPI at up to 10 MHz and used as a hardware root-of-trust token in device pairing, certificate binding, or anti-counterfeiting workflows without requiring a separate dedicated security IC, reducing BOM cost by at least 1 component in IoT gateway and sensor node designs.
For a 1.8 V battery-powered sensor, what SPI clock speed does 25AA02UIDT-I/OT support and how does it affect read latency?
At 1.8 V supply, the 25AA02UIDT-I/OT supports SPI clock frequencies up to 3 MHz, and at 2.5 V to 4.5 V it supports up to 5 MHz, with a maximum rating of 10 MHz. Reading all 256 bytes over SPI at 3 MHz takes approximately 0.7 ms, which is fast enough for firmware boot-time parameter loading and negligible compared to typical microcontroller wake-up latency of 1 ms to 10 ms in ultra-low-power IoT applications.
How many times can the 25AA02UIDT-I/OT be written before wear limits are reached, and which applications must plan for this?
The 25AA02UIDT-I/OT is rated for 1,000,000 write/erase cycles per byte, meaning a byte written once per second would reach the wear limit in approximately 11.6 days if written continuously. Applications storing infrequently updated parameters such as calibration offsets, device configuration, or accumulated operating hours counters will remain well within this limit over a 10-year product life, even with daily writes, as 3,650 writes represents less than 0.004% of the rated endurance.
Is the 25AA02UIDT-I/OT pin-compatible with other Microchip 25-series SPI EEPROMs for migration to higher densities?
Yes, the 25AA02UIDT-I/OT follows the standard Microchip 25-series SPI EEPROM pinout in the 6-pin SOT-23 package, making it footprint-compatible with 25AA04 (4 Kbit) and 25AA08 (8 Kbit) devices in the same package. Migrating to higher density requires only a firmware change to the address byte width (1 byte for 2 Kbit to 4 Kbit, 2 bytes for 8 Kbit and above), enabling a smooth upgrade path without PCB redesign when more storage is needed.
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| 1+ | $0.3490 | $0.35 |
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