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Microchip Technology T555711-TAS
- Part No.:
- T555711-TAS
- Manufacturer:
- Microchip Technology
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
T555711-TAS.pdf
- Description:
- IC RFID TRANSP 100-150KHZ 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,754
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Product details
Overview
T555711-TAS from Atmel (now Microchip Technology) is a contactless read/write RFID identification IC operating at 125 kHz, designed as a passive transponder tag with coil-based power harvesting and bidirectional load-modulated communication. It integrates 330-bit EEPROM (10 × 33-bit blocks), supports e5550 binary compatibility and T5557 extended mode, features password-protected write access, and is used in animal identification, access control, and industrial asset tagging systems.
For engineers reviewing the T555711-TAS datasheet, T555711-TAS pinout, T555711-TAS application, or T555711-TAS equivalent, key selection considerations include its 125 kHz RF interface, configurable modulation (FSK/PSK/Manchester/Biphase/NRZ), programmable data rate (RF/2 to RF/128), 32-bit password protection, and AOR (Answer-On-Request) wake-up capability for multi-tag environments.
Technical Context
The T555711-TAS implements an analog front end (AFE) with on-chip rectifier, clock extractor, field gap detector, and switchable resistive load between Coil 1 and Coil 2 for load modulation. Its internal HV generator enables EEPROM programming without external high-voltage sources.
It operates in three primary modes: regular-read (cyclic block transmission), block-read (direct-access command), and AOR mode (wake-on-valid-password). Configuration is stored in EEPROM Block 0 and loaded into a volatile mode register at power-on reset or after each command sequence.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 125 kHz nominal carrier; supports 100–150 kHz RF range per specification |
| Memory Capacity | 330-bit EEPROM organized as 10 blocks × 33 bits; includes 32-bit password (Block 7) and 64-bit traceability data (Page 1, Blocks 1–2) |
| Data Rate Range | Binary programmable from RF/2 to RF/128; also supports fixed e5550 rates (RF/8, RF/16, RF/32, etc.) |
| Modulation Schemes | FSK, PSK (3 variants), Manchester, Biphase ('50/'57), NRZ - all selectable via EEPROM configuration register |
| Write Protection | Per-block lock bit; OTP bit enables full memory lockdown; password mode requires 32-bit match before write/direct access |
| AOR Functionality | Tag remains silent until receiving valid opcode '10' + correct 32-bit password; enables selective activation in dense RFID fields |
| POR Delay | Configurable up to 67 ms (via bit in Block 0); determines time from field entry to first modulation output |
Pinout & Package
Package: Die form (unpacked wafer-level chip), intended for embedding in inductive coil assemblies. No leaded package; terminals are bond pads for direct wire bonding to antenna coil.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Coil 1 | Analog RF interface terminal | Connects to one end of external LC resonant antenna coil; supplies harvested DC power and receives OOK-encoded reader commands |
| Coil 2 | Analog RF interface terminal | Connects to other end of antenna coil; forms bidirectional RF path for power transfer and load-modulated data transmission |
Key Features
| Feature | Design Value |
|---|---|
| e5550 Binary Compatibility | Interoperable with legacy e5550/e5551 readers without firmware changes; supports same command set and modulation formats |
| Extended Mode (X-mode) | Enables advanced functions including inverse data output, fast write (5 kbps), sequence start marker, and expanded master key control ('6' or '9') |
| Traceability Data | Factory-programmed 64-bit ISO/IEC 15963-compliant identifier in Page 1 Blocks 1–2, including ACL (E0h), MFC (15h), ICR, lot ID, wafer #, and die # |
| Fast Write Method | Reduces write time by ~50% vs standard mode: 5 kbps (vs 2 kbps) enabled via dedicated configuration bit; uses shortened gap timing (12/27 FC) |
| Answer-On-Request (AOR) | Eliminates tag collisions in multi-tag fields by suppressing modulation until explicit wake-up command (opcode '10' + valid password) is received |
Applications
| Animal Identification | Access Control Systems |
|---|---|
|
Use Scenario: Implantable or ear-tag RFID transponders for livestock, pets, and laboratory animals requiring long-term biocompatible operation and ISO 11784/11785 compliance. IC Role / Device Role / Timing Role: Passive transponder IC providing unique ID storage, secure write protection, and field-powered modulation using 125 kHz inductive coupling. Use Value: Enables regulatory-compliant, tamper-resistant identification with factory-programmed traceability data and password-locked reprogramming. |
Use Scenario: Contactless door locks, employee badge readers, and secure facility entry points where reliable short-range ID verification is required. IC Role / Device Role / Timing Role: RFID tag IC supporting Manchester/FSK modulation, AOR mode for anti-collision, and fast-write for rapid credential updates during enrollment. Use Value: Delivers deterministic read response under variable field strength, prevents unauthorized cloning via 32-bit password, and allows selective activation in multi-reader zones. |
| Industrial Asset Tracking | Tool & Equipment Management |
|
Use Scenario: Metal-mount or epoxy-encapsulated tags affixed to machinery, pallets, or containers in harsh factory environments with EMI and temperature extremes. IC Role / Device Role / Timing Role: Ruggedized passive IDIC with -40°C to +85°C operation, on-chip 75 pF resonant capacitor option, and robust field-gap decoding for noisy RF conditions. Use Value: Ensures stable read performance on conductive surfaces and across wide temperature ranges without external tuning components. |
Use Scenario: Reusable tool tracking in aerospace maintenance, surgical instrument sterilization, or shared workshop equipment where frequent reprogramming is needed. IC Role / Device Role / Timing Role: EEPROM-based tag IC supporting direct-access commands, MAXBLK-limited cyclic reads, and fast-write for efficient batch updates. Use Value: Reduces credential update time by 50% (5 kbps), enables per-tool configuration locking, and maintains audit trail via immutable traceability data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar RFID transponder IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EM4102 | Fixed Manchester encoding only; no password, no AOR, no extended mode; 128-bit ROM (not EEPROM); no field-programmable configuration | Suitable for low-cost, unchangeable ID tags; lacks reprogrammability, security, and multi-tag coordination features | Select EM4102 only when immutable serial numbers suffice and cost is primary constraint; not suitable for secure or field-updatable deployments. |
| T5555 | Successor generation with enhanced sensitivity, lower field threshold, and improved POR stability; retains full T5557 command compatibility and memory map | Same use cases but with extended read range and better performance in weak-field or metal-proximate environments | T5555 offers drop-in replacement capability with measurable range improvement; recommended for new designs where higher reliability is critical. |
Compared with EM4102, T555711-TAS provides full EEPROM reprogrammability, password security, and AOR collision avoidance - essential for dynamic asset management. Against T5555, it trades marginal sensitivity gain for broader legacy system compatibility and proven field deployment history.
Availability
T555711-TAS is available at Aetrix Electronics and suitable for animal identification, access control, industrial asset tracking, and tool management applications requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for T555711-TAS 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 continues to manufacture, support, and qualify the T5557 family as part of its secure identification portfolio.
The T5557 product line was designed specifically for low-frequency (125 kHz) passive RFID transponder applications demanding high security, field reprogrammability, and interoperability with global standards including ISO/IEC 11784/11785 and ISO/IEC 15963.
FAQ
What is the function of the Coil 1 and Coil 2 terminals on the T555711-TAS?
The Coil 1 and Coil 2 terminals on the T555711-TAS serve as the sole electrical interface: they harvest energy from the reader's 125 kHz magnetic field to power the IC and simultaneously enable bidirectional communication via load modulation. No external power source or additional pins are required - the IC operates entirely through inductive coupling across these two terminals.
Does the T555711-TAS support ISO/IEC 11784 and 11785 compliance?
Yes, the T555711-TAS is configurable for ISO/IEC 11784/11785 compliance via its EEPROM configuration register. When programmed in e5550 compatibility mode with appropriate data rate and modulation settings (e.g., FSK at RF/40), it meets the air-interface requirements for animal identification systems defined in those standards.
How does the Answer-On-Request (AOR) mode work in the T555711-TAS?
In AOR mode, the T555711-TAS remains non-modulating after power-on until it receives a valid wake-up command: opcode '10' followed by the correct 32-bit password stored in Block 7. This prevents simultaneous responses from multiple tags in the same RF field, enabling deterministic single-tag selection - critical for high-density scanning environments.
Can the T555711-TAS be reprogrammed after initial deployment?
Yes, the T555711-TAS supports full field reprogramming of its 330-bit EEPROM via pulse-interval encoded commands sent by a compatible reader. Reprogramming requires correct opcode, address, data, and - if password mode is enabled - a matching 32-bit password. Lock bits and OTP functionality allow permanent write protection when required.
What is the difference between T555711-TAS and T555701-TAS?
The T555711-TAS variant includes the "damping option" disabled, resulting in lower activation field strength and extended read range compared to T555701-TAS. Both share identical memory, command set, and configuration capabilities, but T555711-TAS is optimized for maximum sensitivity in low-power or distance-critical applications.
T555711-TAS Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- T555711
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- RFID Transponder
- Frequency:
- 100kHz ~ 150kHz
- Standards:
- ISO 11784, ISO 11785, ISO 15693
- Interface:
- -
- Voltage - Supply:
- 3.2V ~ 4V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
T555711-TAS FAQ
1.How can I place an order for T555711-TAS through Aetrix?
Please submit a Request for Quotation (RFQ) for T555711-TAS 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 T555711-TAS reliable?
The price and inventory of T555711-TAS are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for T555711-TAS is usually 5 days.
3.What payment methods are accepted for T555711-TAS?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for T555711-TAS transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for T555711-TAS?
T555711-TAS orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your T555711-TAS 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 T555711-TAS?
For technical support, including T555711-TAS datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your T555711-TAS requirements.
6.How does Aetrix verify that T555711-TAS is sourced from the original manufacturer or authorized distributors?
All T555711-TAS 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 T555711-TAS meets industry standards.
7.What is the process for return or replacement of T555711-TAS?
All T555711-TAS units undergo pre-shipment inspection (PSI). If there is an issue with T555711-TAS, 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 T555711-TAS part is unused and in its original packaging.
Return procedure for T555711-TAS:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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