My Inquiry
My Account
STMicroelectronics SRIX4K-A4S/1GE
- Part No.:
- SRIX4K-A4S/1GE
- Manufacturer:
- STMicroelectronics
- Category:
- RFID, RF Access, Monitoring ICs
- Package:
- -
- Datasheet:
-
SRIX4K-A4S/1GE.pdf
- Description:
- IC RFID TRANSP 13.56MHZ ADH ANT
- Quantity:
- Payment:
- Shipping:
Inventory:3,098
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SRIX4K-A4S/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 on-board power, drawing energy from the reader's RF field, and supports block read/write (32-bit), two auto-protected binary counters, and self-timed programming. Used in secure access tokens and reusable transit cards.
For engineers reviewing the SRIX4K-A4S/1GE datasheet, SRIX4K-A4S/1GE pinout, SRIX4K-A4S/1GE application, or SRIX4K-A4S/1GE equivalent, key selection criteria include ISO 14443-2/3 Type B compliance, 106 Kbit/s data rate, 1 million write cycles, 40-year data retention, and integrated anti-clone logic for authentication-critical deployments.
Technical Context
The SRIX4K-A4S/1GE implements a probabilistic slot-based anticollision protocol per ISO 14443-3 Type B, using Slot_marker and Select commands to resolve multiple tags in field. Its RF interface uses 10% ASK modulation at 13.56 MHz for downlink and BPSK-modulated 847 kHz subcarrier for uplink, enabling full-duplex communication at 106 Kbit/s.
Memory architecture comprises three distinct regions: a resettable 5-byte OTP area (addresses 0–4), two 32-bit decrement-only binary counters (addresses 5–6), and a 4096-bit EEPROM organized as 128 × 32-bit blocks (addresses 7–127). All writes trigger internal auto-erase and feature automated anti-tearing protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface Standard | ISO 14443-2 Type B (RF interface) and ISO 14443-3 Type B (frame format) |
| Carrier Frequency | 13.56 MHz - enables interoperability with standard HF RFID readers |
| Data Rate | 106 Kbit/s - defines maximum command/response throughput in both directions |
| Memory Capacity | 4096-bit EEPROM (128 × 32-bit blocks) - supports structured, block-level data storage |
| Unique Identifier | 64-bit UID - provides globally unique tag identity for system-level tracking |
| Endurance & Retention | 1 million erase/write cycles / 40-year data retention - ensures long-term reliability in high-cycle applications |
| Anticollision | 8-bit Chip_ID + probabilistic slot scanning - resolves multiple tags without host coordination |
| Security Function | France Telecom proprietary anti-clone authentication - prevents physical duplication of credentials |
Pinout & Package
Unsawn wafer die with bumping; no external package or leadframe. Bond pads AC1 and AC0 connect directly to the antenna coil - no voltage supply pins, no digital I/O, no ground terminal. Power and communication occur entirely via inductive coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Antenna Coil Terminal | Primary RF input/output node; connects to one end of external loop antenna |
| AC0 | Antenna Coil Terminal | Secondary RF input/output node; completes antenna connection path for resonant tuning |
Key Features
| Feature | Design Value |
|---|---|
| Self-powered operation | No battery or external VDD required - powered solely by 13.56 MHz RF field energy |
| Block-oriented memory access | Read_block/Write_block commands operate on fixed 32-bit units - simplifies firmware buffer management |
| Automated anti-tearing protection | Hardware-enforced atomicity for counter and EEPROM writes - prevents data corruption during power loss |
| Internal tuning capacitor | Integrated capacitance enables precise LC resonance with external antenna - reduces component count and calibration effort |
| Standardized command set | 10 ISO-aligned commands (e.g., Initiate, Select, Get_UID) - ensures interoperability across certified readers |
Applications
| Secure Physical Access Control | Reusable Public Transit Ticketing |
|---|---|
Use Scenario: Employee badge authenticates at door reader using challenge-response handshake. IC Role / Device Role / Timing Role: Contactless memory IC providing UID, encrypted credential storage, and anti-clone verification during reader interrogation. Use Value: Prevents badge cloning via France Telecom anti-clone function while supporting fast 106 Kbit/s credential exchange. | Use Scenario: Fare card debits balance at turnstile using stored value and transaction counters. IC Role / Device Role / Timing Role: Secure EEPROM storing encrypted balance, usage logs, and two 32-bit decrementing counters for audit trail. Use Value: Automated anti-tearing ensures counter integrity during mid-transaction power loss, meeting EN 1545 transit standards. |
| Electronic Identity Documents | Industrial Asset Tagging |
Use Scenario: National ID card stores biometric template hash and issuing authority signature in protected EEPROM. IC Role / Device Role / Timing Role: ISO 14443-3 Type B compliant memory IC delivering cryptographic keys and signed data blocks to inspection device. Use Value: 64-bit UID and OTP-lockable system area enable tamper-evident personalization and lifecycle control. | Use Scenario: Factory tooling tag tracks calibration history and maintenance cycles via write-once counters. IC Role / Device Role / Timing Role: Passive contactless memory IC storing asset ID, service dates, and two decrementing counters for scheduled replacement. Use Value: 1 million write cycles and 40-year retention guarantee data integrity over multi-decade equipment lifespans. |
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-A4S/1GE | Same die family, but 1024-bit EEPROM and no anti-clone function | Lacks France Telecom authentication; suitable only for non-security credential use | Select when cost sensitivity outweighs clone resistance requirements |
| MIFARE Classic 1K (NXP) | ISO 14443-3 Type A, 1024-byte EEPROM, proprietary Crypto-1 cipher | Type A protocol stack and different security model - not interoperable without reader redesign | Choose only if existing infrastructure mandates Type A compatibility |
Compared with SR3000-A4S/1GE, SRIX4K-A4S/1GE adds 4× memory capacity and hardware anti-clone enforcement; versus MIFARE Classic 1K, it offers Type B interoperability and standardized frame handling but requires reader firmware updates for authentication flow integration.
Availability
SRIX4K-A4S/1GE is available at Aetrix Electronics and suitable for secure access control systems, reusable transit fare media, electronic ID documents, and industrial asset tagging requiring stable component supply and long-term lifecycle support.
Supply support for SRIX4K-A4S/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, designing and manufacturing microcontrollers, analog ICs, MEMS, and secure microcontrollers for industrial, automotive, and smart-card markets.
SRIX4K belongs to ST's contactless memory IC product line, engineered specifically for ISO 14443-3 Type B short-range secure identification applications requiring high endurance, anti-cloning, and field-powered operation.
FAQ
What antenna design considerations apply to SRIX4K-A4S/1GE?
The SRIX4K-A4S/1GE requires a tuned 13.56 MHz loop antenna connected directly to AC1 and AC0. Its integrated tuning capacitor (typically ~20 pF) must be matched with external inductance to achieve series resonance. Recommended antenna inductance is 1.0–1.5 µH; impedance matching ensures optimal power transfer and >5 cm read range under standard conditions.
Does SRIX4K-A4S/1GE support password protection or encryption?
No - SRIX4K-A4S/1GE does not implement on-chip password protection, AES, or other cryptographic ciphers. Security relies exclusively on its France Telecom–licensed anti-clone function and physical unclonability. Data confidentiality must be handled externally by the reader system using application-layer protocols.
How is the 64-bit UID accessed and verified?
The 64-bit UID is retrieved using the Get_UID() command (command code 0x0A), which returns the full identifier in a single answer frame. The UID is factory-programmed, read-only, and used by readers to initiate anticollision sequences or validate tag authenticity against known-good values in backend databases.
Can SRIX4K-A4S/1GE be used with ISO 14443-3 Type A readers?
No - SRIX4K-A4S/1GE complies strictly with ISO 14443-2/3 Type B physical layer and framing. It is incompatible with Type A readers due to differences in modulation (ASK vs. ASK+subcarrier), bit encoding (10% vs. 100%), and protocol timing. Interoperability requires dedicated Type B reader hardware and firmware.
SRIX4K-A4S/1GE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- -
- 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:
- -
- Supplier Device Package:
- -
SRIX4K-A4S/1GE FAQ
1.How can I place an order for SRIX4K-A4S/1GE through Aetrix?
Please submit a Request for Quotation (RFQ) for SRIX4K-A4S/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-A4S/1GE reliable?
The price and inventory of SRIX4K-A4S/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-A4S/1GE is usually 5 days.
3.What payment methods are accepted for SRIX4K-A4S/1GE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRIX4K-A4S/1GE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRIX4K-A4S/1GE?
SRIX4K-A4S/1GE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRIX4K-A4S/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-A4S/1GE?
For technical support, including SRIX4K-A4S/1GE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRIX4K-A4S/1GE requirements.
6.How does Aetrix verify that SRIX4K-A4S/1GE is sourced from the original manufacturer or authorized distributors?
All SRIX4K-A4S/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-A4S/1GE meets industry standards.
7.What is the process for return or replacement of SRIX4K-A4S/1GE?
All SRIX4K-A4S/1GE units undergo pre-shipment inspection (PSI). If there is an issue with SRIX4K-A4S/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-A4S/1GE part is unused and in its original packaging.
Return procedure for SRIX4K-A4S/1GE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRIX4K-A4S/1GE Tags
-
SL2S2602FTBX
NXP Semiconductors
-
ST25DV04K-IER6S3
STMicroelectronics
-
ST25DV04K-IER6C3
STMicroelectronics
-
LXMSJZNCMD-217
Murata Electronics
-
NT3H2111W0FTTJ
NXP Semiconductors
-
NT3H2111W0FHKH
NXP Semiconductors
-
M24LR04E-RMC6T/2
STMicroelectronics
-
ST25DV04KC-JF6D3
STMicroelectronics
-
ST25DV64KC-IE6S3
STMicroelectronics
-
ST25DV64K-IER6T3
STMicroelectronics
-
NT3H2211W0FTTJ
NXP Semiconductors
-
NT3H2211W0FHKH
NXP Semiconductors
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
