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STMicroelectronics SRI512-A3S/1GE
- Part No.:
- SRI512-A3S/1GE
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- Die
- Datasheet:
-
SRI512-A3S/1GE.pdf
- Description:
- IC RFID TRANSP 13.56MHZ ADH ANT
- Quantity:
- Payment:
- Shipping:
Inventory:3,477
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Product details
Overview
SRI512-A3S/1GE from STMicroelectronics is a 13.56 MHz ISO 14443-3 Type B contactless memory IC with 512-bit EEPROM, 64-bit UID, and hardware-based anticollision for multi-tag environments. It operates without an external power supply, draws energy from the reader's RF field, supports block read/write (32-bit), and integrates internal tuning capacitance for antenna matching in smart label and NFC tag applications.
For engineers reviewing the SRI512-A3S/1GE datasheet, SRI512-A3S/1GE pinout, SRI512-A3S/1GE application, or SRI512-A3S/1GE equivalent, key selection criteria include ISO 14443-2 Type B air interface compliance, 106 Kbit/s data rate, 8-bit Chip_ID anticollision, self-timed 5 ms programming, and 1 million write cycles - all critical for secure, high-reliability RFID tag design.
Technical Context
The SRI512-A3S/1GE implements a passive RF interface compliant with ISO 14443-2 Type B: it demodulates 10% ASK-modulated 13.56 MHz carrier using on-chip regulators and ASK demodulators, and transmits responses via BPSK load modulation at 847 kHz subcarrier. Its state machine transitions between Power-off, Ready, Inventory, Selected, Deselected, and Deactivated states to manage tag arbitration and command execution.
Memory is partitioned into three functional areas: a resettable 5-byte OTP region, two 32-bit binary counters with automated antitearing protection, and a 512-bit EEPROM organized as 16 × 32-bit blocks. All writes trigger auto-erase; read/write commands operate at the block level with CRC-protected frame structure per ISO 14443-3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Standard | ISO 14443-2 Type B air interface and ISO 14443-3 Type B frame format - ensures interoperability with standard readers and defines SOF/EOF timing, CRC, and command protocol. |
| Carrier Frequency | 13.56 MHz - enables operation within globally licensed HF RFID band and compatibility with common reader antennas and couplers like CRX14. |
| Data Rate | 106 Kbit/s bidirectional - determines maximum transaction throughput and sets timing constraints for reader firmware and frame processing latency. |
| Memory Capacity | 512-bit EEPROM (16 × 32-bit blocks) - provides sufficient storage for UID, configuration, counter values, and application data in compact tag designs. |
| Anticollision | 8-bit Chip_ID based system - enables deterministic selection of individual tags among multiple devices in the same RF field without collision-induced data loss. |
| Endurance & Retention | 1 million erase/write cycles and 40-year data retention - guarantees long-term reliability in reusable asset tracking, access control, and industrial tagging. |
| Programming Time | 5 ms typical self-timed cycle - eliminates need for external timing control and simplifies host-side command sequencing in embedded reader systems. |
Pinout & Package
Package: Unpackaged bumped and sawn wafer die (no leadframe or molded package); intended for direct flip-chip bonding to antenna substrates in inlay manufacturing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC0 | Antenna Coil Terminal 0 | Primary RF input node; connects directly to one end of printed loop antenna; forms resonant LC tank with internal tuning capacitor (~13 pF). |
| AC1 | Antenna Coil Terminal 1 | Secondary RF input node; connects to opposite end of antenna; completes RF energy harvesting path and enables load modulation backscatter. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated Tuning Capacitor | ~13 pF on-die capacitance eliminates need for external matching components, reducing inlay BOM cost and size. |
| Automated Antitearing Protection | Hardware-enforced atomic decrement for dual 32-bit counters prevents partial updates during power interruption in high-cycle counting applications. |
| Write Protect Functionality | EEPROM blocks can be individually locked via OTP_Lock_Reg, enabling permanent configuration or credential storage without risk of overwrite. |
| 64-bit Unique Identifier | Factory-programmed UID ensures global uniqueness and cryptographic binding for authentication and anti-cloning in secure tagging. |
| Resettable OTP Area | 5-byte one-time programmable region supports initial device personalization and can be fully erased to '1's for reprogramming in production test flows. |
Applications
| Smart Access Cards | Reusable Asset Tags |
|---|---|
|
Use Scenario: Contactless entry cards used in corporate campuses and secure facilities requiring tamper-resistant identity storage. IC Role / Device Role / Timing Role: Passive memory IC storing encrypted credentials and access permissions; powered and interrogated by fixed-reader infrastructure. Use Value: 64-bit UID and OTP lock prevent cloning; 40-year data retention ensures card lifetime exceeds mechanical wear-out; ISO 14443-B compliance guarantees reader interoperability. |
Use Scenario: Industrial tooling or medical equipment tagged for lifecycle tracking across maintenance cycles and sterilization events. IC Role / Device Role / Timing Role: Reusable RFID tag with antitearing counters logging usage cycles; survives repeated thermal/chemical exposure due to wafer-level robustness. Use Value: Dual 32-bit counters track up to ~4.3 billion operations per counter; 1 million write cycles support frequent update in high-utilization assets. |
| Library Book Labels | NFC-Enabled Packaging |
|
Use Scenario: Self-checkout and inventory management in public libraries using handheld or gate-mounted HF readers. IC Role / Device Role / Timing Role: Low-cost, high-volume memory tag storing ISBN and circulation status; selected via Chip_ID anticollision in multi-book stacks. Use Value: 8-bit Chip_ID anticollision resolves >250 tags simultaneously in dense shelving; 106 Kbit/s enables rapid batch scanning without manual separation. |
Use Scenario: Consumer product packaging with tap-to-authenticate functionality for brand verification and warranty registration. IC Role / Device Role / Timing Role: Embedded contactless memory holding digital signature keys and batch identifiers; powered only during smartphone NFC interrogation. Use Value: Internal tuning capacitor simplifies antenna integration into thin paperboard; write-protect enables factory-only provisioning of security data. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar contactless memory applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SRF512-A3S/1GE | Same die, different wafer bumping process (Au vs Al); identical electrical specs and memory map. | No functional difference; used interchangeably in inlay assembly where bump metallurgy matches substrate bonding requirements. | Select based on assembly line bonding capability (thermosonic Au vs ultrasonic Al). |
| M24LR64-R | 64-Kbit EEPROM, I²C + RF dual-interface, ISO 15693-compatible, no built-in anticollision logic. | Requires external microcontroller for anticollision handling; suited for hybrid wired/wireless systems needing larger memory. | Choose when >512-bit storage or I²C debug interface is required; not drop-in for pure ISO 14443-B tag use. |
Compared with SRF512-A3S/1GE, the SRI512-A3S/1GE offers identical functionality with verified bumping compatibility for high-yield inlay production; versus M24LR64-R, it delivers dedicated, hardware-accelerated anticollision and lower power consumption but lacks dual-interface flexibility and memory scalability.
Availability
SRI512-A3S/1GE is available at Aetrix Electronics and suitable for smart access cards, reusable asset tags, library book labels, and NFC-enabled packaging requiring stable component supply across high-volume RFID inlay manufacturing.
Supply support for SRI512-A3S/1GE 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 specializing in microcontrollers, power management, sensors, and secure connectivity solutions for automotive, industrial, and consumer markets.
The SRI512-A3S/1GE belongs to ST's contactless memory IC product line, designed specifically for ISO 14443-3 Type B short-range RFID tags requiring high reliability, low-cost inlay integration, and certified interoperability in access control and identification systems.
FAQ
What antenna design considerations apply to the SRI512-A3S/1GE?
The SRI512-A3S/1GE integrates an ~13 pF internal tuning capacitor, enabling resonance with standard 13.56 MHz loop antennas without external capacitors. Antenna inductance should be tuned to 1–2 µH for optimal power transfer; AC0 and AC1 must connect directly to antenna terminals with minimal trace inductance to preserve Q-factor and read range.
How does the 8-bit Chip_ID anticollision system work in practice?
The SRI512-A3S/1GE implements a deterministic slot-based anticollision protocol per ISO 14443-3 Type B: the reader broadcasts Pcall16 to initiate inventory, then uses Slot_marker and Select commands to isolate individual tags by their unique 8-bit Chip_ID. This allows reliable identification of up to 256 tags in overlapping fields without frame collisions.
Can the EEPROM be written byte-by-byte, or is block-only access mandatory?
Block-only access is mandatory: the SRI512-A3S/1GE supports only Read_block and Write_block commands operating on aligned 32-bit (4-byte) boundaries. There is no byte-level or bit-level write capability; each Write_block triggers an automatic erase cycle, and partial-block updates require full-block read-modify-write sequences.
Is the 64-bit UID factory-programmed and permanently unchangeable?
Yes - the 64-bit UID is laser-trimmed during final wafer test and stored in the system area; it cannot be altered by any command, including Write_block or OTP programming. This ensures cryptographic binding and global uniqueness for secure authentication and anti-counterfeiting applications.
SRI512-A3S/1GE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- Die
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- RFID Transponder
- Frequency:
- 13.56MHz
- Standards:
- ISO 14443, ISO 15693
- Interface:
- -
- Voltage - Supply:
- 2.5V ~ 3.5V
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
SRI512-A3S/1GE FAQ
1.How can I place an order for SRI512-A3S/1GE through Aetrix?
Please submit a Request for Quotation (RFQ) for SRI512-A3S/1GE 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 SRI512-A3S/1GE reliable?
The price and inventory of SRI512-A3S/1GE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRI512-A3S/1GE is usually 5 days.
3.What payment methods are accepted for SRI512-A3S/1GE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRI512-A3S/1GE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRI512-A3S/1GE?
SRI512-A3S/1GE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRI512-A3S/1GE 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 SRI512-A3S/1GE?
For technical support, including SRI512-A3S/1GE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRI512-A3S/1GE requirements.
6.How does Aetrix verify that SRI512-A3S/1GE is sourced from the original manufacturer or authorized distributors?
All SRI512-A3S/1GE 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 SRI512-A3S/1GE meets industry standards.
7.What is the process for return or replacement of SRI512-A3S/1GE?
All SRI512-A3S/1GE units undergo pre-shipment inspection (PSI). If there is an issue with SRI512-A3S/1GE, 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 SRI512-A3S/1GE part is unused and in its original packaging.
Return procedure for SRI512-A3S/1GE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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