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STMicroelectronics SRIX4K-A3S/1GE
- Part No.:
- SRIX4K-A3S/1GE
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- Die
- Datasheet:
-
SRIX4K-A3S/1GE.pdf
- Description:
- IC RFID TRANSP 13.56MHZ ADH ANT
- Quantity:
- Payment:
- Shipping:
Inventory:1,306
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Product details
Overview
SRIX4K-A3S/1GE from STMicroelectronics is a 13.56 MHz ISO 14443-3 Type B contactless memory IC with 4096-bit EEPROM, 64-bit unique identifier, 8-bit Chip_ID–based anticollision, and France Telecom–licensed anti-clone authentication. It operates without an external power supply, drawing energy from the reader's RF field, and supports block-wise read/write (32-bit blocks) at 106 Kbit/s for secure short-range identification in access control and transit ticketing systems.
For engineers reviewing the SRIX4K-A3S/1GE datasheet, SRIX4K-A3S/1GE pinout, SRIX4K-A3S/1GE application, or SRIX4K-A3S/1GE equivalent, key selection criteria include ISO 14443-2 Type B air interface compliance, 1-million erase/write cycle endurance, automated antitearing protection for binary counters, internal tuning capacitor integration, and deterministic 5 ms typical programming time per block.
Technical Context
The SRIX4K-A3S/1GE implements a probabilistic anticollision protocol using slot markers and 8-bit Chip_ID enumeration per ISO 14443-3 Type B, enabling reliable multi-tag interrogation in dense RFID environments. Its RF front-end demodulates 10% ASK-modulated 13.56 MHz carrier and encodes responses via BPSK load modulation on an 847 kHz subcarrier.
Memory architecture comprises three distinct regions: a resettable OTP area (addresses 0–4), two 32-bit binary countdown counters (addresses 5–6) with automated antitearing, and a 4096-bit EEPROM organized as 128 × 32-bit blocks (addresses 7–127), all accessible via ten defined commands including Authenticate, Get_UID, and Write_block.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Standard | ISO 14443-2 Type B compliant air interface and ISO 14443-3 Type B frame format - ensures interoperability with standard Type B readers. |
| Carrier Frequency | 13.56 MHz - enables operation within globally licensed HF RFID band and compatibility with common reader hardware. |
| Data Rate | 106 Kbit/s bidirectional - defines maximum command/response throughput and impacts transaction latency in high-throughput applications. |
| Memory Capacity | 4096-bit EEPROM (128 × 32-bit blocks) - provides sufficient storage for cryptographic keys, credentials, and usage logs in secure ID tokens. |
| Endurance & Retention | 1 million erase/write cycles; 40-year data retention - guarantees long-term reliability in reusable transit cards or access badges subjected to daily transactions. |
| Anticollision | 8-bit Chip_ID–based probabilistic scanning - allows simultaneous identification of multiple tags without manual polling or timing coordination. |
| Security Features | France Telecom proprietary anti-clone function + automated antitearing for counters - prevents physical cloning and ensures atomic counter decrement even during power loss. |
Pinout & Package
Unsawn wafer die with bumping; no discrete package-designed for direct flip-chip bonding to antenna substrates. Requires external antenna coil connected across AC0 and AC1 terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC0 | Antenna Coil Terminal | Primary connection point for one end of the printed loop antenna; forms resonant LC tank with internal tuning capacitor. |
| AC1 | Antenna Coil Terminal | Secondary connection point for the other end of the antenna; completes RF energy harvesting path and data coupling loop. |
Key Features
| Feature | Design Value |
|---|---|
| Self-timed programming cycle | Eliminates need for external timing control-internal logic manages erase-verify-write sequence autonomously per Write_block command. |
| Internal tuning capacitor | Reduces bill-of-materials count and layout sensitivity-enables resonance at 13.56 MHz with only external antenna inductance required. |
| Automated antitearing protection | Guarantees atomic counter state update-prevents partial writes during RF field dropout, critical for fare deduction or access quota tracking. |
| 64-bit unique identifier | Provides cryptographically strong device fingerprint-used in challenge-response authentication flows to bind operations to specific physical tags. |
| Read_block / Write_block (32-bit) | Enables efficient bulk data access-minimizes command overhead versus byte-level operations, improving throughput in credential loading scenarios. |
Applications
| Transit Fare Card | Secure Physical Access Token |
|---|---|
Use Scenario: Reusable contactless smart card used for metro/bus fare payment with balance decrement and trip logging. IC Role / Device Role / Timing Role: Contactless memory IC storing encrypted balance, transaction history, and session keys; responds to reader-initiated Authenticate and Write_block commands. Use Value: 40-year data retention and 1-million write cycles ensure card lifetime exceeds mechanical wear; anti-clone function prevents counterfeit top-up fraud. | Use Scenario: Employee badge supporting multi-factor physical access with dynamic privilege updates. IC Role / Device Role / Timing Role: Secure credential storage element holding biometric template hashes and role-based access policies; accessed via Get_UID and Read_block during door controller handshake. Use Value: 64-bit UID enables binding of cryptographic keys to hardware identity; automated antitearing protects counter-based one-time password generation. |
| Electronic Passport Document | Reusable Event Ticket |
Use Scenario: Embedded in passport booklet cover for storing biometric data and digital signature certificates. IC Role / Device Role / Timing Role: ISO 14443-3 Type B compliant memory IC providing tamper-resistant storage for eMRTD data objects; accessed under ICAO-compliant PACE protocols. Use Value: France Telecom anti-clone function meets ICAO Annex 9 security requirements for document authenticity; internal tuning capacitor simplifies antenna integration into laminated booklet structure. | Use Scenario: Disposable yet re-scannable wristband for multi-day music festivals with entry validation and cashless payment. IC Role / Device Role / Timing Role: Low-cost contactless memory IC storing event schedule, gate access permissions, and microtransaction balance; updated via Write_block during vendor kiosk interactions. Use Value: 5 ms typical programming time enables sub-second balance updates at high-traffic gates; 106 Kbit/s data rate supports concurrent scanning of multiple wristbands in crowd flow. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar contactless memory IC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SR3000-A3S/1GE | Same die family but 1024-bit EEPROM; lacks anti-clone function and binary counters. | Suitable for basic ID tokens where cryptographic authentication and usage counting are not required. | Select when cost sensitivity outweighs security and feature depth; verify reader firmware compatibility with reduced command set. |
| Mifare DESFire EV3 (MF3DH40) | 32 KB EEPROM; AES-256 crypto engine; contactless CPU architecture-not memory-only. | Required for applications needing mutual authentication, file system abstraction, or dynamic key management. | Choose only if full cryptographic processing and multi-application support are mandatory; higher BOM cost and design complexity apply. |
Compared with SR3000-A3S/1GE, SRIX4K-A3S/1GE adds anti-clone assurance and dual binary counters essential for fare deduction; versus MF3DH40, it trades cryptographic flexibility for lower power, smaller die size, and deterministic 5 ms write latency ideal for high-volume transaction endpoints.
Availability
SRIX4K-A3S/1GE is available at Aetrix Electronics and suitable for transit fare systems, secure physical access deployments, electronic passport programs, and reusable event ticketing requiring stable component supply across multi-year production cycles.
Supply support for SRIX4K-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 headquartered in Geneva, Switzerland, delivering silicon solutions for automotive, industrial, and smart mobility markets with emphasis on security, power efficiency, and system integration.
SRIX4K-A3S/1GE belongs to ST's contactless memory IC product line, engineered specifically for ISO 14443-3 Type B short-range identification systems demanding high reliability, clone resistance, and seamless antenna integration in constrained form factors.
FAQ
What antenna design guidelines apply to SRIX4K-A3S/1GE?
The SRIX4K-A3S/1GE requires a planar loop antenna tuned to 13.56 MHz using its internal 24 pF capacitor; recommended antenna inductance is 1.0–1.5 µH. Layout must minimize parasitic capacitance between AC0/AC1 traces, and antenna impedance should target 50 Ω at resonance for optimal power transfer and read range up to 10 cm with Class A readers.
How does the anti-clone function operate in practice?
The France Telecom–licensed anti-clone function uses a proprietary challenge-response algorithm executed between the SRIX4K-A3S/1GE and a certified reader (e.g., using CRX14 coupler). The tag generates a dynamic response based on its unique 64-bit UID and internal secret key; successful verification confirms hardware authenticity and blocks emulation attempts using copied UID data.
Can SRIX4K-A3S/1GE be used with ISO 14443-3 Type A readers?
No-SRIX4K-A3S/1GE is strictly ISO 14443-2/3 Type B compliant and incompatible with Type A modulation (100% ASK), coding (Miller), or frame structure. Attempting communication with Type A readers results in no response due to fundamental air interface mismatch in carrier handling, subcarrier generation, and SOF/EOF timing.
What is the purpose of the resettable OTP area?
The resettable OTP area (addresses 0–4) stores configuration bits and lock states that can be programmed from 1→0 and erased back to all-1s via the Reset_OTP command. It enables permanent write-protection activation for EEPROM blocks or system registers after initial provisioning, while retaining flexibility during development and personalization phases.
SRIX4K-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
- Interface:
- -
- Voltage - Supply:
- 2.5V ~ 3.5V
- Operating Temperature:
- -20°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
SRIX4K-A3S/1GE FAQ
1.How can I place an order for SRIX4K-A3S/1GE through Aetrix?
Please submit a Request for Quotation (RFQ) for SRIX4K-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 SRIX4K-A3S/1GE reliable?
The price and inventory of SRIX4K-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 SRIX4K-A3S/1GE is usually 5 days.
3.What payment methods are accepted for SRIX4K-A3S/1GE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRIX4K-A3S/1GE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRIX4K-A3S/1GE?
SRIX4K-A3S/1GE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRIX4K-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 SRIX4K-A3S/1GE?
For technical support, including SRIX4K-A3S/1GE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRIX4K-A3S/1GE requirements.
6.How does Aetrix verify that SRIX4K-A3S/1GE is sourced from the original manufacturer or authorized distributors?
All SRIX4K-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 SRIX4K-A3S/1GE meets industry standards.
7.What is the process for return or replacement of SRIX4K-A3S/1GE?
All SRIX4K-A3S/1GE units undergo pre-shipment inspection (PSI). If there is an issue with SRIX4K-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 SRIX4K-A3S/1GE part is unused and in its original packaging.
Return procedure for SRIX4K-A3S/1GE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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