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Microchip Technology ATA555815-PP
- Part No.:
- ATA555815-PP
- Manufacturer:
- Microchip Technology
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- Module
- Datasheet:
-
ATA555815-PP.pdf
- Description:
- IC RFID TRANSP 100-250KHZ MODULE
- Quantity:
- Payment:
- Shipping:
Inventory:2,372
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Product details
Overview
ATA555815-PP from Microchip Technology (formerly Atmel) is a contactless, two-terminal R/W identification IC (IDIC®) operating in the low-frequency RFID band (~125 kHz), designed for passive transponder applications requiring deterministic anticollision, 1024-bit user EEPROM, and dual-password memory protection. It derives power and clock from the interrogator's RF field, supports Manchester/NRZ/Bi-phase uplink encoding, and integrates on-chip tuning capacitors (80 pF or 210 pF mask option).
For engineers reviewing the ATA555815-PP datasheet, ATA555815-PP pinout, ATA555815-PP application, or ATA555815-PP equivalent, this page delivers verified technical context, exact memory mapping (32-block user + 10-block system), deterministic anticollision performance (~20 tags/s), ISO/IEC 11785–compliant 16-bit CRC, and real-world use cases in access control, asset tagging, and EAS systems.
Technical Context
The ATA555815-PP implements a fully passive analog front end with rectifier, low-voltage regulator, charge pump for EEPROM programming, and field clock extractor - enabling operation without an external power source. Its deterministic binary-tree anticollision algorithm uses configurable Tag ID lengths (16–96 bits) and starts from MSB in block 56 to resolve multiple tags within the RF field.
Uplink transmission uses ASK load modulation via controlled resistive damping between Coil 1 and Coil 2, supporting Manchester (RF/16), Bi-phase (RF/8), or NRZ (RF/2–RF/64) encoding per configuration register settings. Downlink employs enhanced 1-out-of-4 pulse interval encoding at ~5 kbps, with start gap detection and auto-adjusting timing referenced to SOC (00) for environmental robustness.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 125 kHz nominal (100–200 kHz range); enables reliable near-field inductive coupling through metal or liquid environments. |
| User Memory | 1024 bits EEPROM (32 × 32-bit blocks); organized into 8 pages of 4 blocks each for granular password-based write/read protection. |
| System Memory | 320 bits (10 × 32-bit blocks); stores Tag ID (up to 96 bits), traceability data (IC code, MFC=15h, wafer/die/lot), passwords, and configuration register (block 63). |
| Anticollision Rate | ~20 tags/s with 40-bit Tag ID at RF/32; deterministic binary tree elimination ensures predictable multi-tag resolution without retries or timeouts. |
| CRC Compliance | 16-bit CRC-CCITT (P(x)=x¹⁶+x¹²+x⁵+x⁰), reverse implementation per ISO/IEC 11785; mandatory for write commands when config bit 10 = 1. |
| Uplink Encoding | Configurable ASK modulation: Manchester (RF/16), Bi-phase (RF/8), or NRZ (RF/2 to RF/64); enables interoperability with legacy FDX-B and custom reader firmware. |
| Tuning Capacitor | Mask-selectable 80 pF ±12% or 210 pF ±12%; eliminates need for external capacitor trimming and simplifies coil matching for 125 kHz resonance. |
Pinout & Package
ATA555815-PP is housed in a 6-pin SOIC package (SOIC-6, 3.9 mm × 4.9 mm, 1.27 mm pitch). The device has only two functional terminals: Coil 1 and Coil 2 - both serve as bidirectional RF interface pads for power harvesting and ASK load modulation. No VDD, GND, or digital I/O pins are present; all logic and memory operate entirely from harvested RF energy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Coil 1 | Analog RF terminal | Connects to one end of external LC resonant coil; participates in rectification, clock extraction, and load-switching modulation. |
| Coil 2 | Analog RF terminal | Connects to other end of external LC coil; forms current path for on-chip resistive load switching during uplink transmission. |
| NC (Pins 3, 4, 5, 6) | No-connect | Unused die bond pads; electrically isolated and must remain unconnected in PCB layout to avoid parasitic coupling or ESD paths. |
Key Features
| Feature | Design Value |
|---|---|
| Deterministic Anticollision | Binary-tree elimination using MSB-aligned Tag ID (16–96 bits); guarantees collision-free identification of up to ~20 tags/s without probabilistic backoff delays. |
| Three-Tier Security | Independent read/write passwords (blocks 54/55), per-page lock bits (block 62), and Master Key (0x6 = full protection, 0x0 = provisioning mode) enable phased security deployment. |
| Traceability Integration | Factory-programmed 64-bit Atmel MSN (blocks 59–61) includes IC code '5558', MFC=15h, wafer #, die #, and lot ID - usable directly as immutable Tag ID source. |
| Public Mode (PM) | Tag Talks First (TTF) operation with single SOF preamble; eliminates need for reader-initiated polling in simple presence-detection applications like door entry or tool tracking. |
| Electrical Article Surveillance (EAS) | Dedicated EAS mode (config bit) enables alarm-triggering behavior without memory access - suitable for retail anti-theft systems with minimal reader complexity. |
Applications
| Access Control Systems | Industrial Asset Tracking |
|---|---|
|
Use Scenario: Secure door entry using passive key fobs or embedded tags in tools/machinery. IC Role / Device Role / Timing Role: Passive transponder providing authenticated identity via password-protected read and deterministic Tag ID response to 125 kHz readers. Use Value: Eliminates battery dependency and enables tamper-resistant credential storage with factory-traceable MSN for audit compliance. |
Use Scenario: High-volume identification of metal-encased assets in manufacturing or logistics. IC Role / Device Role / Timing Role: Low-frequency RFID tag with integrated 80/210 pF tuning capacitor, enabling reliable coupling through conductive housings without external component tuning. Use Value: Reduces BOM count and assembly steps by removing discrete tuning caps while maintaining ISO/IEC 11785 compatibility. |
| Retail EAS Integration | Tool & Equipment Management |
|
Use Scenario: Anti-theft deactivation at point-of-sale using EAS mode interrogation. IC Role / Device Role / Timing Role: Dedicated EAS-mode responder that asserts presence without memory access or authentication overhead. Use Value: Enables low-cost, low-power EAS functionality alongside standard R/W operations - same IC serves dual security roles. |
Use Scenario: Tool crib management where tagged hand tools report usage via fixed Tag ID and programmable user memory. IC Role / Device Role / Timing Role: Deterministic multi-tag reader environment support with 40-bit Tag ID optimized for ~20 tags/s throughput in shared tool storage cabinets. Use Value: Prevents inventory loss via fast, repeatable identification even when multiple tools are simultaneously present in reader field. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar passive LF RFID transponder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| EM4102 | Fixed 64-bit read-only Tag ID; no user/system memory, no password, no CRC, no anticollision logic. | Suitable only for basic presence detection; cannot store dynamic data or support secure access control. | Select EM4102 only for cost-sensitive, static-ID applications where memory, security, and multi-tag handling are unnecessary. |
| TKS4001 | 128-bit user memory (4 × 32-bit), no system memory, no password protection, no configurable Tag ID length, no EAS mode. | Limited to simple data logging; lacks traceability, deterministic anticollision, and multi-layer security required for industrial deployment. | Choose TKS4001 only for prototyping or low-security OEM tagging where Atmel's MSN, page locking, and ISO-compliant CRC are not required. |
Compared with EM4102 and TKS4001, the ATA555815-PP uniquely combines factory-traceable MSN, 1024-bit user memory with per-page password control, deterministic anticollision, and EAS/Public modes - making it the only option among the three qualified for secure, high-throughput, and standards-compliant LF RFID deployments.
Availability
ATA555815-PP is available at Aetrix Electronics and suitable for access control systems, industrial asset tagging, and retail EAS applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for ATA555815-PP 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 ATA5558 family, including datasheets, application notes, and long-term product availability commitments.
The ATA5558 series was designed specifically for secure, battery-free 125 kHz RFID transponders in industrial, automotive, and access control environments - emphasizing deterministic multi-tag resolution, EEPROM integrity, and factory-level traceability.
FAQ
What is the exact package type and pin configuration of the ATA555815-PP?
The ATA555815-PP is supplied in a 6-pin SOIC package (SOIC-6, 3.9 mm × 4.9 mm, 1.27 mm pitch) with only two functional terminals: Coil 1 and Coil 2. Pins 3–6 are no-connect (NC) and must remain unconnected. The device draws all operating power and clock from the RF field coupled across Coil 1 and Coil 2 - no external power supply or digital interface is required for ATA555815-PP operation.
Does the ATA555815-PP support ISO/IEC 11785 compliance, and which specific features implement it?
Yes, the ATA555815-PP implements ISO/IEC 11785 compliance through its 16-bit CRC-CCITT generator (reverse polynomial P(x)=x¹⁶+x¹²+x⁵+x⁰), deterministic anticollision algorithm, and FDX-B–compatible Bi-phase uplink encoding. It also meets the standard's physical layer requirements via its 125 kHz operation, ASK modulation scheme, and Tag ID structure - all verified in the official Atmel ATA5558 datasheet (4681E–RFID–11/09).
How does the ATA555815-PP handle memory protection, and what are the practical implications for secure data storage?
The ATA555815-PP implements three-tier memory protection: (1) per-block lock bits preventing rewrites after programming, (2) independent 32-bit read/write passwords stored in system memory blocks 54 and 55, and (3) Master Key–controlled access levels (e.g., Master Key = 0x6 enables full protection). This allows staged security deployment - e.g., initial provisioning with Master Key = 0, then final lockdown after password and Tag ID programming - ensuring irreversible data integrity for ATA555815-PP in deployed systems.
Can the ATA555815-PP be used in metal-rich environments, and what design features enable this?
Yes, the ATA555815-PP is well-suited for metal-rich environments due to its 125 kHz low-frequency operation, which provides deeper magnetic field penetration than HF/UHF RFID, and its integrated tuning capacitors (80 pF or 210 pF mask option), which simplify LC tank resonance tuning without external components. These features reduce sensitivity to eddy current losses and allow reliable coupling even when embedded in or mounted on metallic surfaces - a key advantage of ATA555815-PP over higher-frequency alternatives.
What are the differences between Public Mode (PM) and Interrogator Talks First (ITF) mode in the ATA555815-PP?
In Public Mode (PM), the ATA555815-PP initiates communication autonomously after power-on reset with a single SOF pattern - ideal for simple presence detection (e.g., door sensors). In Interrogator Talks First (ITF) mode, the tag remains silent until receiving a valid command from the reader - enabling secure, addressed transactions (e.g., read/write with password). Both modes are configured via the operating mode bits in the ATA555815-PP configuration register (block 63), and PM requires no reader-side protocol changes beyond SOF detection.
ATA555815-PP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- ATA5558
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- RFID Transponder
- Frequency:
- 100kHz ~ 250kHz
- Standards:
- ISO 11785
- Interface:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Module
ATA555815-PP FAQ
1.How can I place an order for ATA555815-PP through Aetrix?
Please submit a Request for Quotation (RFQ) for ATA555815-PP 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 ATA555815-PP reliable?
The price and inventory of ATA555815-PP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ATA555815-PP is usually 5 days.
3.What payment methods are accepted for ATA555815-PP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ATA555815-PP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ATA555815-PP?
ATA555815-PP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ATA555815-PP 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 ATA555815-PP?
For technical support, including ATA555815-PP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ATA555815-PP requirements.
6.How does Aetrix verify that ATA555815-PP is sourced from the original manufacturer or authorized distributors?
All ATA555815-PP 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 ATA555815-PP meets industry standards.
7.What is the process for return or replacement of ATA555815-PP?
All ATA555815-PP units undergo pre-shipment inspection (PSI). If there is an issue with ATA555815-PP, 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 ATA555815-PP part is unused and in its original packaging.
Return procedure for ATA555815-PP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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