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STMicroelectronics PRIM2-M24LR-A
- Part No.:
- PRIM2-M24LR-A
- Manufacturer:
- STMicroelectronics
- Category:
- RF, RFID, Wireless Evaluation Boards
- Package:
- Datasheet:
-
PRIM2-M24LR-A.pdf
- Description:
- BOARD REF ANTENNA M24LR-A
- Quantity:
- Payment:
- Shipping:
Inventory:1,278
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Product details
Overview
PRIM2-M24LR-A from STMicroelectronics is a reference antenna evaluation module designed for the M24LRxx series of dual-interface (RF + I²C) EEPROM tags. It enables RF communication at 13.56 MHz (ISO 15693), supports energy harvesting, and interfaces directly with the STM32-PRIMER2 development board for I²C access. Used in RFID-enabled sensor nodes and battery-free IoT edge devices.
For engineers reviewing the PRIM2-M24LR-A datasheet, PRIM2-M24LR-A pinout, PRIM2-M24LR-A application, or PRIM2-M24LR-A equivalent, this page provides verified hardware interface details, RF/I²C coexistence behavior, energy harvesting capability confirmation, and integration guidance with STM32-PRIMER2-based prototyping.
Technical Context
The PRIM2-M24LR-A is a passive RF antenna board - not an IC or discrete component - optimized for coupling with M24LR64-R and related dual-interface EEPROMs. It implements a tuned 13.56 MHz loop antenna matching the ISO/IEC 15693 standard, with impedance and inductance calibrated to maximize power transfer and data reliability within 5–10 cm range.
No active circuitry or silicon is present on the board. Its design centers on electromagnetic performance: inductance ≈ 1.1 µH, self-resonant frequency >20 MHz, and Q-factor tuned for robust tag interrogation under variable load conditions (e.g., metallic or lossy substrates). It connects exclusively via solder pads or spring-pin headers to the STM32-PRIMER2's dedicated M24LR interface.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Antenna Type | Printed planar loop antenna, optimized for 13.56 MHz ISO 15693 operation |
| RF Standard | Fully compliant with ISO/IEC 15693-2/-3 for 1-out-of-4 coding, 26.48 kbps data rate |
| Operating Distance | Up to 10 cm with standard reader; reduced to ~5 cm when mounted on metal or high-loss surfaces |
| Energy Harvesting Support | Enables up to 3 V DC output to M24LRxx tag via RF field - sufficient to power internal EEPROM and logic |
| Interface Method | Solder pads and spring-pin header for direct connection to STM32-PRIMER2's M24LR expansion port |
| Physical Form | Single-layer PCB, 50 mm × 30 mm, FR-4 substrate with 35 µm copper |
Availability
PRIM2-M24LR-A is available at Aetrix Electronics and suitable for RFID prototyping, NFC-adjacent industrial sensing, and battery-free embedded data logging requiring stable component supply and documented interoperability with STM32-PRIMER2 and M24LR64-R tags.
Supply support for PRIM2-M24LR-A 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, sensors, power management ICs, and analog/mixed-signal products for industrial, automotive, and consumer applications.
The PRIM2-M24LR-A belongs to ST's M24LR evaluation ecosystem - developed specifically to accelerate adoption of dual-interface EEPROMs in maintenance-free, energy-harvesting IoT endpoints where wired power is impractical.
FAQ
Is PRIM2-M24LR-A a standalone RFID reader?
No. PRIM2-M24LR-A is a passive reference antenna board - it contains no RF transceiver, microcontroller, or power source. It requires connection to an external ISO 15693 reader (e.g., CR95HF) for RF interrogation and to the STM32-PRIMER2 for I²C control. Its function is purely electromagnetic coupling and signal conditioning.
Can PRIM2-M24LR-A be used with non-ST microcontrollers?
Yes - but only for RF communication. The I²C interface is mechanically and electrically matched to the STM32-PRIMER2's dedicated M24LR expansion header. To use with other hosts, custom PCB routing or level-shifting adapter boards are required to replicate the exact pin mapping, pull-up configuration, and timing alignment specified in UM0853.
Does PRIM2-M24LR-A include firmware or software?
No. PRIM2-M24LR-A is hardware-only. All firmware execution resides on the connected STM32-PRIMER2 or external reader. The M24LRxx_Application_Software referenced in UM0853 runs on a host PC and communicates with the hardware via USB-to-serial bridge on the PRIMER2 - the antenna board itself has no programmable element.
What is the purpose of the "reference antenna" designation in documentation?
"Reference antenna" indicates that PRIM2-M24LR-A serves as a calibrated benchmark for RF performance validation - its geometry, inductance, and impedance are fixed per ST's characterization. Engineers use it to verify tag readability, optimize reader antenna placement, and validate energy harvesting yield before designing custom antennas for final products.
PRIM2-M24LR-A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Antenna
- Frequency:
- 13.56MHz
- Contents:
- Board(s)
- Utilized IC / Part:
- M24LR-64-R
PRIM2-M24LR-A FAQ
1.How can I place an order for PRIM2-M24LR-A through Aetrix?
Please submit a Request for Quotation (RFQ) for PRIM2-M24LR-A 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 PRIM2-M24LR-A reliable?
The price and inventory of PRIM2-M24LR-A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PRIM2-M24LR-A is usually 5 days.
3.What payment methods are accepted for PRIM2-M24LR-A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PRIM2-M24LR-A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PRIM2-M24LR-A?
PRIM2-M24LR-A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PRIM2-M24LR-A 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 PRIM2-M24LR-A?
For technical support, including PRIM2-M24LR-A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PRIM2-M24LR-A requirements.
6.How does Aetrix verify that PRIM2-M24LR-A is sourced from the original manufacturer or authorized distributors?
All PRIM2-M24LR-A 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 PRIM2-M24LR-A meets industry standards.
7.What is the process for return or replacement of PRIM2-M24LR-A?
All PRIM2-M24LR-A units undergo pre-shipment inspection (PSI). If there is an issue with PRIM2-M24LR-A, 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 PRIM2-M24LR-A part is unused and in its original packaging.
Return procedure for PRIM2-M24LR-A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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