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Microchip Technology ATA5551M-PPMY
- Part No.:
- ATA5551M-PPMY
- Manufacturer:
- Microchip Technology
- Category:
- RFID Transponders, Tags
- Package:
- Datasheet:
-
ATA5551M-PPMY.pdf
- Description:
- RFID TAG R/W 125KHZ ENCAP
- Quantity:
- Payment:
- Shipping:
Inventory:4,713
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Product details
Overview
ATA5551M-PPMY from Microchip Technology (formerly Atmel) is a fully programmable, plastic-packaged 125 kHz read/write RFID transponder IC implementing anti-collision via answer-on-request (AOR), featuring 264-bit on-chip EEPROM (8 × 33-bit blocks), contactless inductive power supply, and configurable modulation (Manchester, FSK, PSK, biphase) and bitrate (RF/8 to RF/128). It serves as the mobile tag in closed-coupled identification systems for access control and asset tracking.
For engineers reviewing the ATA5551M-PPMY datasheet, ATA5551M-PPMY pinout, ATA5551M-PPMY application, or ATA5551M-PPMY equivalent, this page delivers verified technical context, exact EEPROM architecture, confirmed 125 kHz LC antenna integration, real-world AOR timing (<500 ms for 10 tags), and validated alternative transponders with functional trade-offs in password mode and MAXBLK behavior.
Technical Context
The ATA5551M-PPMY integrates the Atmel IDIC e5551 die with a tuned LC antenna (coil + capacitor) in a single plastic cube package. Its analog front end includes a rectifier for contactless power generation, clock extractor, switchable load for read-back damping, and field gap detector for write command decoding.
Operation relies on bidirectional amplitude modulation of the 125 kHz RF field: reading occurs via controlled coil damping; writing uses precisely timed RF field gaps (16–32 FC for '0', 48–64 FC for '1'). The controller loads configuration from EEPROM Block 0 at power-on, enabling modulator stage selection (MS1/MS2), bitrate (BR[2:0]), MAXBLK limit, and AOR/PWD/STOP modes before initiating data transmission.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 125 kHz nominal (120–130 kHz range); enables reliable short-range inductive coupling in metal-rich industrial environments. |
| EEPROM Capacity | 264 bits in 8 blocks of 33 bits; 224 user-programmable bits across Blocks 1–6, with Block 7 reserved for password or user data. |
| Write Time per Block | Typically <50 ms to write and verify; includes 16 ms programming pulse and HV generator ramp-up, critical for high-throughput tag personalization. |
| Anti-collision Performance | 10 transponders read in <500 ms (RF/32, Maxblock 2); achieved via AOR mode requiring wake-up command with valid password. |
| Modulation Options | Manchester, FSK, PSK (3 variants), biphase; selectable per stage in EEPROM Block 0, enabling interoperability with diverse reader firmware stacks. |
| Bitrate Range | RF/8 to RF/128 (e.g., 15.625 kbit/s to 976 bit/s at 125 kHz); configured via BR[2:0] bits, balancing data rate against field stability and noise immunity. |
| Operating Temperature | –40°C to +85°C; qualified for industrial embedded use in access panels, medical equipment housings, and factory-floor asset tags. |
Pinout & Package
ATA5551M-PPMY is housed in a proprietary plastic cube package integrating the e5551 die and LC antenna. It has no external pins - Coil1 and Coil2 are internal bond pads connected to the integrated ferrite-core coil and tuning capacitor. Power and bidirectional communication occur exclusively through the resonant LC circuit; no VDD/VSS pins are exposed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Coil1 / Coil2 | LC Resonator Interface | Direct connection to integrated ferrite-core coil and tuning capacitor; forms 125 kHz resonant tank for contactless power harvesting and amplitude-modulated data exchange. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated LC Antenna | Ferrite-core coil + capacitor tuned to 125 kHz within plastic cube; eliminates external antenna design, reduces BOM count, and ensures consistent read range (≥18 A/m Hpp threshold). |
| Configurable Anti-collision | AOR mode activated by EEPROM bit; requires reader-sent OP-code + password to enable modulation-prevents tag collisions in dense deployments without protocol stack changes. |
| Block-Level Write Protection | Lock bit per 33-bit block (Bit 0); once set, prevents field reprogramming of that block including its own lock bit-enables secure ID code locking and password persistence. |
| Multi-Stage Modulation Engine | Two-stage modulator (MS1/MS2 bits) supporting Manchester+PSK, FSK+bi-phase combinations; allows reader firmware to select optimal encoding for EMI-limited or low-power scenarios. |
| Field-Gap Write Protocol | Gaps of 16–64 field clocks encode '0'/'1'; immune to RF amplitude fluctuations and compatible with low-cost readers using simple MOSFET switching instead of precision DACs. |
Applications
| Access Control Systems | Brand Protection Tags |
|---|---|
Use Scenario: Secure door entry using handheld or wall-mounted 125 kHz readers verifying employee credentials stored on plastic key fobs. IC Role / Device Role / Timing Role: Mobile transponder providing tamper-resistant ID storage and AOR-enabled multi-tag interrogation in crowded badge queues. Use Value: Enables <500 ms readout of 10+ fobs via AOR, eliminating manual fob presentation and reducing throughput bottlenecks at high-traffic entrances. |
Use Scenario: Embedding unclonable serial IDs into pharmaceutical packaging or luxury goods to verify authenticity at point-of-sale or customs checkpoints. IC Role / Device Role / Timing Role: Passive, battery-free tag storing encrypted product batch codes and manufacturing dates in write-protected EEPROM blocks. Use Value: Leverages 100,000-program-cycle EEPROM and malprogramming protection to ensure lifetime integrity of brand-critical identifiers against field tampering. |
| Industrial Asset Tracking | Medical Equipment ID |
Use Scenario: Attaching ruggedized tags to CNC machines, calibration tools, or test fixtures to log maintenance history and location via fixed RFID portals. IC Role / Device Role / Timing Role: Environmentally hardened transponder operating reliably from –40°C to +85°C, with MAXBLK limiting transmitted blocks to reduce airtime in noisy factory RF environments. Use Value: Uses RF/8 bitrate and Manchester modulation to maintain link integrity near variable-frequency drives and welding equipment emitting broadband EMI. |
Use Scenario: Sterilizable wristbands or instrument tags used in hospitals to track patient identity, device calibration status, and usage logs across autoclave cycles. IC Role / Device Role / Timing Role: Plastic-packaged, non-metallic tag compliant with ISO/IEC 11784/11785 physical layer; supports password-protected write access during clinical software updates. Use Value: Achieves >10-year data retention and withstands 170°C assembly reflow, ensuring EEPROM integrity through repeated sterilization and long-term patient record linkage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar R/W RFID transponder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EM4102 | Fixed 125 kHz read-only architecture; no EEPROM, no write capability, no AOR or password features; 64-bit ROM ID only. | Suitable only for static ID applications (e.g., basic animal tagging); cannot support rolling codes, dynamic data updates, or anti-collision in multi-tag zones. | Select EM4102 only when cost sensitivity outweighs need for field reprogrammability and collision management. |
| TKS4001 | 134.2 kHz frequency; 256-bit EEPROM; supports FDX-B protocol but lacks AOR mode and multi-stage modulation; write time ~100 ms/block. | Designed for veterinary and livestock ID where FDX-B compliance is mandatory; incompatible with 125 kHz access control infrastructure. | Choose TKS4001 only for regulatory-mandated FDX-B deployments; not interchangeable with ATA5551M-PPMY due to frequency and protocol mismatch. |
Compared with EM4102 and TKS4001, the ATA5551M-PPMY uniquely combines 125 kHz operation, field-programmable EEPROM, AOR anti-collision, and multi-modulation flexibility-making it the only option among the three capable of supporting secure, updatable, high-density access control and industrial tracking systems.
Availability
ATA5551M-PPMY is available at Aetrix Electronics and suitable for access control systems, industrial asset tracking, and medical equipment ID requiring stable component supply across extended production lifecycles.
Supply support for ATA5551M-PPMY 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 acquired Atmel in 2016 and maintains full support for legacy Atmel RFID products. The company specializes in secure microcontrollers, analog, and wireless solutions for industrial, automotive, and IoT markets.
The ATA5551M-PPMY belongs to Atmel's IDIC® e5551 family, designed specifically for cost-sensitive, high-reliability 125 kHz RFID transponder applications requiring field-upgradable memory, robust anti-collision, and integrated antenna functionality.
FAQ
What is the function of the Coil1 and Coil2 terminals on the ATA5551M-PPMY?
The Coil1 and Coil2 terminals on the ATA5551M-PPMY are internal bond pads connected directly to the integrated ferrite-core coil and tuning capacitor. They form the 125 kHz resonant LC circuit that harvests power from the reader's RF field and enables bidirectional amplitude-modulated communication-no external connections or pins are required, as the entire antenna system is embedded within the plastic cube package of the ATA5551M-PPMY.
Does the ATA5551M-PPMY support true pin-to-pin replacement with other Atmel transponders like the ATA5577?
No, the ATA5551M-PPMY does not support pin-to-pin replacement with the ATA5577. While both are 125 kHz R/W transponders, the ATA5577 uses a different EEPROM architecture (256-bit, 8 × 32-bit), lacks AOR anti-collision, and implements distinct modulation encoding and gap-detection thresholds. The ATA5551M-PPMY's integrated LC antenna and internal pad layout are also mechanically and electrically unique-substitution requires full system validation and is not supported by Microchip as a drop-in replacement.
How does the MAXBLK feature affect read performance in the ATA5551M-PPMY?
The MAXBLK parameter in EEPROM Block 0 of the ATA5551M-PPMY limits the number of user data blocks transmitted during each read cycle-for example, setting MAXBLK = 3 restricts output to Blocks 1–3 only. This reduces total airtime per tag interrogation, improving multi-tag throughput in dense environments and minimizing exposure to RF noise. When MAXBLK = 0, only Block 0 (configuration) is readable, which is useful for secure initialization but disables normal data transmission in the ATA5551M-PPMY.
Can the ATA5551M-PPMY be programmed using standard ISO/IEC 15693 readers?
No, the ATA5551M-PPMY is not compatible with ISO/IEC 15693 readers. It operates exclusively at 125 kHz using Atmel's proprietary field-gap write protocol and amplitude-shift modulation-not the 13.56 MHz carrier, subcarrier modulation, or command set defined in ISO/IEC 15693. Programming requires a dedicated 125 kHz reader capable of generating precise RF field gaps (16–64 field clocks) and interpreting the ATA5551M-PPMY's specific OP-code structure and block addressing scheme.
What is the purpose of the "lock bit" in each EEPROM block of the ATA5551M-PPMY?
Each 33-bit EEPROM block in the ATA5551M-PPMY includes a dedicated lock bit (Bit 0) that, when set, permanently prevents field reprogramming of that entire block-including the lock bit itself. This provides hardware-enforced write protection for critical data such as immutable ID codes, configuration parameters in Block 0, or passwords in Block 7. Once locked, the block remains read-accessible but cannot be altered without decapsulation and direct die probing-ensuring long-term data integrity in the ATA5551M-PPMY.
ATA5551M-PPMY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Style:
- Encapsulated
- Technology:
- Passive
- Frequency:
- 125kHz
- Memory Type:
- Read/Write
- Writable Memory:
- 224b (User)
- Standards:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Size / Dimension:
- 0.492" L x 0.232" W (12.10mm x 5.90mm)
ATA5551M-PPMY FAQ
1.How can I place an order for ATA5551M-PPMY through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA5551M-PPMY 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 ATA5551M-PPMY reliable?
The price and inventory of ATA5551M-PPMY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA5551M-PPMY is usually 5 days.
3.What payment methods are accepted for ATA5551M-PPMY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA5551M-PPMY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA5551M-PPMY?
ATA5551M-PPMY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA5551M-PPMY 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 ATA5551M-PPMY?
For technical support, including ATA5551M-PPMY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA5551M-PPMY requirements.
6.How does Aetrix verify that ATA5551M-PPMY is sourced from the original manufacturer or authorized distributors?
All ATA5551M-PPMY 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 ATA5551M-PPMY meets industry standards.
7.What is the process for return or replacement of ATA5551M-PPMY?
All ATA5551M-PPMY units undergo pre-shipment inspection (PSI). If there is an issue with ATA5551M-PPMY, 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 ATA5551M-PPMY part is unused and in its original packaging.
Return procedure for ATA5551M-PPMY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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