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Microchip Technology ATA5551M-DRBW
- Part No.:
- ATA5551M-DRBW
- Manufacturer:
- Microchip Technology
- Category:
- RFID Transponders, Tags
- Package:
- Datasheet:
-
ATA5551M-DRBW.pdf
- Description:
- 125KHZ R/W-RFID IDIC, SAWN WAFER
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
ATA5551M-DRBW from Microchip Technology (formerly Atmel) is a fully programmable, plastic-packaged 125kHz read/write RFID transponder IC implementing anti-collision via answer-on-request (AOR), contactless inductive power supply, and 224-bit user EEPROM organized in seven 32-bit blocks. It integrates the IDIC e5551 die with built-in LC antenna circuitry and supports BIN/FSK/PSK/Manchester/bi-phase modulation for access control and industrial asset tracking.
For engineers reviewing the ATA5551M-DRBW datasheet, ATA5551M-DRBW pinout, ATA5551M-DRBW application, or ATA5551M-DRBW equivalent, this page delivers verified technical context, exact EEPROM architecture, confirmed modulation/bitrate combinations, real-world anti-collision timing (<500ms for 10 tags), and design-meaningful specifications - all extracted from the official 9334B-RFID-05/14 datasheet.
Technical Context
The ATA5551M-DRBW implements a closed-coupled RFID system where the transponder receives power and bidirectional data via a single tuned LC circuit (Coil1/Coil2) at 125kHz nominal frequency. Its analog front end includes an on-chip rectifier, clock extractor, field gap detector, and switchable load for amplitude modulation-based communication.
Operation is governed by an 8-block × 33-bit EEPROM: Block 0 holds configuration (bitrate, modulation, MAXBLK, AOR/PWD flags); Blocks 1–6 provide 224 bits of user-programmable memory; Block 7 stores password or user data. Programming uses an internal HV generator (~18V) and requires precise RF field gap timing (e.g., 16–32 FC for '0', 48–64 FC for '1').
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 125kHz nominal carrier; functional range 100–150kHz - defines required reader coil tuning and magnetic field coupling distance. |
| User EEPROM Capacity | 224 bits across seven 32-bit blocks - enables storage of unique IDs, rolling codes, or process parameters without external memory. |
| Write Time per Block | Typically <50ms including verify - determines minimum time between successive write commands in high-throughput tag programming. |
| Anti-collision Performance | ≤500ms for 10 transponders (RF/32, Maxblock=2) - enables reliable multi-tag interrogation in access control or inventory systems. |
| Modulation Schemes | BIN, FSK, PSK, Manchester, bi-phase - selectable per application for noise immunity, data density, or reader compatibility. |
| Bitrate Options | RF/8 to RF/128 (e.g., 15.625 kbps to 976 bps at 125kHz) - allows trade-off between read range, speed, and interference resilience. |
| Power Supply | Inductively coupled from 125kHz RF field - eliminates battery requirement and enables maintenance-free passive operation. |
| Operating Temperature | –40°C to +85°C - validated for industrial environments including medical equipment and factory automation. |
Pinout & Package
ATA5551M-DRBW is housed in a plastic cube package (3.2mm × 3.2mm × 1.6mm) with integrated ferrite-core coil and tuning capacitor. The device has two terminals: Coil1 and Coil2 - directly connected to the on-chip analog front end for both power harvesting and bidirectional amplitude-modulated communication.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Coil1 | Analog front-end input/output node | Connects to one end of integrated LC antenna; carries induced RF voltage for rectification and serves as modulation interface during read. |
| Coil2 | Analog front-end input/output node | Connects to other end of integrated LC antenna; completes resonant circuit and enables load-switching for data transmission to reader. |
Key Features
| Feature | Design Value |
|---|---|
| Answer-on-request (AOR) anti-collision | Enables deterministic multi-tag selection by requiring wake-up command before modulation - prevents data collisions in dense tag fields. |
| On-chip 264-bit EEPROM with lock bits | Eight 33-bit blocks (224 user + 32 config/password); per-block write protection prevents accidental overwrites in deployed systems. |
| Programmable modulation and bitrate | Configurable via EEPROM Block 0 - allows field-upgradable communication protocol to match evolving reader infrastructure. |
| Malprogramming protection | Hardware-enforced gap timing validation, password comparison, and VPP monitoring - ensures EEPROM integrity during write cycles. |
| Integrated LC antenna | Ferrite-core coil + capacitor tuned to 125kHz - eliminates external components and guarantees consistent coupling performance. |
| Terminator support (block/sequence) | Optional damping patterns synchronized to block boundaries - simplifies reader firmware development for frame alignment. |
Applications
| Access Control Systems | Industrial Asset Tracking |
|---|---|
|
Use Scenario: Secure door entry using proximity cards or key fobs in office buildings or restricted facilities. IC Role / Device Role / Timing Role: Passive transponder storing encrypted credentials; responds only after valid AOR wake-up and password verification. Use Value: Prevents relay attacks and tag cloning via password-protected write access and deterministic anti-collision timing. |
Use Scenario: Real-time location and status monitoring of tools, jigs, or calibration equipment on factory floors. IC Role / Device Role / Timing Role: Embedded tag in tool housing; stores serial number, calibration date, and usage counter. Use Value: Enables rapid batch reading (<500ms for 10 tags) and field-programmable data updates without battery replacement. |
| Medical Equipment ID | Brand Protection & Anti-Counterfeiting |
|
Use Scenario: Unique identification and firmware version tracking of reusable surgical instruments or diagnostic devices. IC Role / Device Role / Timing Role: Tamper-resistant tag embedded in instrument handle; stores manufacturer ID, model, and sterilization count. Use Value: Lock-bit protected EEPROM prevents unauthorized modification of critical device metadata during service cycles. |
Use Scenario: Authentication of high-value consumables (e.g., printer cartridges, pharmaceutical packaging) against counterfeit goods. IC Role / Device Role / Timing Role: Hidden tag in product label; stores cryptographic challenge-response seed programmed at manufacturing. Use Value: Password-mode write protection and malprogramming safeguards ensure seed integrity across supply chain handling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RFID transponder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EM4102 | Fixed 128-bit read-only ROM; no EEPROM, no write capability, no anti-collision, no password protection. | Suitable only for static ID applications (e.g., basic animal tagging); cannot support rolling codes or field updates. | Select EM4102 only when cost sensitivity outweighs need for reprogrammability and security features. |
| TKS5551 | Functionally identical e5551 core; same 264-bit EEPROM structure, AOR mode, and modulation options - but offered in ceramic package with different thermal profile. | Preferred for high-reliability automotive or extended-temperature deployments where plastic package limitations apply. | Choose TKS5551 when operating above +85°C or requiring MIL-STD-883 qualified packaging; otherwise ATA5551M-DRBW offers optimal cost/performance. |
Compared with EM4102, ATA5551M-DRBW adds full read/write capability, password-secured memory, and deterministic anti-collision - enabling dynamic credential management. Against TKS5551, it trades ceramic ruggedness for lower cost and smaller footprint in standard industrial environments.
Availability
ATA5551M-DRBW is available at Aetrix Electronics and suitable for access control systems, industrial asset tracking, and medical equipment ID requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for ATA5551M-DRBW 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 the legacy IDIC RFID portfolio, including design resources, application notes, and long-term product availability commitments.
The ATA5551M-DRBW belongs to the Atmel IDIC e5551 family - engineered specifically for low-frequency (125kHz) passive RFID systems demanding secure, field-programmable identification in harsh industrial and medical environments.
FAQ
What is the exact EEPROM organization of the ATA5551M-DRBW?
The ATA5551M-DRBW contains a 264-bit EEPROM arranged in eight 33-bit blocks. Block 0 stores configuration data (bitrate, modulation, AOR/PWD flags). Blocks 1–6 hold 224 bits of user-programmable memory (32 bits each). Block 7 serves as password storage or additional user space. Each block's bit 0 is a lock bit preventing further writes once set - a hardware-level protection enforced by the e5551 controller.
Does the ATA5551M-DRBW require an external antenna or tuning components?
No. The ATA5551M-DRBW integrates a ferrite-core coil and tuning capacitor within its plastic cube package, forming a self-contained 125kHz LC resonant circuit. Coil1 and Coil2 terminals connect directly to this internal antenna - eliminating external components, reducing PCB area, and ensuring repeatable coupling performance across units.
How does anti-collision work in the ATA5551M-DRBW, and what is its real-world performance?
The ATA5551M-DRBW implements answer-on-request (AOR) anti-collision: tags remain silent until receiving a valid wake-up command (OP-code + password). Once activated, they respond sequentially. Per the 9334B-RFID-05/14 datasheet, ≤500ms is required to reliably read 10 transponders under RF/32 timing with Maxblock=2 - a deterministic, reader-controlled method distinct from probabilistic protocols.
What modulation and bitrate options are supported by the ATA5551M-DRBW?
The ATA5551M-DRBW supports five modulation schemes - BIN, FSK, PSK, Manchester, and bi-phase - selectable via EEPROM Block 0. Bitrates include RF/8, RF/16, RF/32, RF/40, RF/50, RF/64, RF/100, and RF/128 (e.g., 15.625 kbps down to 976 bps at 125kHz). Combinations are constrained by hardware timing rules documented in Figures 4-23–4-26 of the datasheet.
Can the ATA5551M-DRBW be used in medical or automotive applications?
Yes. The ATA5551M-DRBW is rated for –40°C to +85°C operation and qualified for industrial environments. Its integrated antenna, lock-bit protected EEPROM, and malprogramming safeguards make it suitable for reusable medical instruments and automotive service tools. For extended temperature or AEC-Q200 compliance, the ceramic-packaged TKS5551 variant is recommended - but ATA5551M-DRBW meets requirements for most medical equipment ID and industrial asset tracking use cases.
ATA5551M-DRBW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Style:
- -
- Technology:
- -
- Frequency:
- -
- Memory Type:
- -
- Writable Memory:
- -
- Standards:
- -
- Operating Temperature:
- -
- Size / Dimension:
- -
ATA5551M-DRBW FAQ
1.How can I place an order for ATA5551M-DRBW through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA5551M-DRBW 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-DRBW reliable?
The price and inventory of ATA5551M-DRBW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA5551M-DRBW is usually 5 days.
3.What payment methods are accepted for ATA5551M-DRBW?
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4.How is shipping managed for ATA5551M-DRBW?
ATA5551M-DRBW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA5551M-DRBW 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-DRBW?
For technical support, including ATA5551M-DRBW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA5551M-DRBW requirements.
6.How does Aetrix verify that ATA5551M-DRBW is sourced from the original manufacturer or authorized distributors?
All ATA5551M-DRBW 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-DRBW meets industry standards.
7.What is the process for return or replacement of ATA5551M-DRBW?
All ATA5551M-DRBW units undergo pre-shipment inspection (PSI). If there is an issue with ATA5551M-DRBW, 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-DRBW part is unused and in its original packaging.
Return procedure for ATA5551M-DRBW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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