STMicroelectronics LRIS2K-A1S/1GE

Overview

LRIS2K-A1S/1GE from STMicroelectronics is a 2048-bit ISO 15693/ISO 18000-3 Mode 1 compliant RFID tag IC operating at 13.56 MHz with 64-bit UID, password protection, and EAS capability. It supports dual data rates (6.6 Kbit/s and 26 Kbit/s), block-wise read/write (32-bit blocks), and features 1,000,000 erase/write cycles with 40-year data retention. Used in secure asset tracking, library management, and industrial tool identification where tamper-resistant, contactless memory is required.

For engineers reviewing the LRIS2K-A1S/1GE datasheet, LRIS2K-A1S/1GE pinout, LRIS2K-A1S/1GE application, or LRIS2K-A1S/1GE equivalent, key selection criteria include ISO 15693 compliance, multipassword security architecture, Fast command support (53 Kbit/s), load modulation subcarrier options (423 kHz / 484 kHz), and Block Lock EEPROM protection.

Technical Context

The LRIS2K-A1S/1GE implements a passive RF interface compliant with ISO/IEC 15693–2 and ISO/IEC 18000-3 Mode 1 physical layer specifications. It uses ASK modulation (10% or 100%) for downlink and load modulation with Manchester coding for uplink, supporting both low (6.6 Kbit/s) and high (26 Kbit/s) data rates - plus Fast mode (53 Kbit/s) via dedicated commands.

Internally, it integrates a 21 pF tuning capacitor for antenna matching, a 2048-bit EEPROM organized in 64 × 32-bit blocks with per-block lock control, and a state machine supporting Power-off, Ready, Quiet, and Selected modes. Security includes software-controlled EAS, Kill function, AFI/DSFID programmability, and triple-layer password protection (write, lock, present).

Key Specifications

Pinout & Package

Sawn bumped wafer die - no external pins; intended for embedding into inlay antennas or laminated smart labels. Requires external coil antenna connected across RF input terminals (no discrete package or leadframe).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RFID tag IC applications.

Compared with ST25DV02K, LRIS2K-A1S/1GE offers superior passive-only simplicity and ISO 15693-native performance; compared with SL2S2001, it delivers 2× memory, triple-password security, and 2× data rate - making it the preferred choice for new secure asset tagging designs.

Availability

LRIS2K-A1S/1GE is available at Aetrix Electronics and suitable for industrial tool tracking, library media management, retail anti-counterfeiting, and aerospace asset identification requiring stable component supply and long-term lifecycle assurance.

Supply support for LRIS2K-A1S/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, sensors, power ICs, and analog/mixed-signal devices for automotive, industrial, and consumer markets.

LRIS2K-A1S/1GE belongs to ST's ST25 RFID tag IC family, engineered specifically for secure, standards-compliant HF RFID applications demanding high endurance, cryptographic-grade access control, and seamless integration with ISO 15693 infrastructure.

FAQ

Does LRIS2K-A1S/1GE require an external crystal or clock source?

No. The LRIS2K-A1S/1GE is a fully passive device powered solely by the reader's RF field. It contains no internal oscillator or timing crystal; all timing is derived from the 13.56 MHz carrier signal and internally generated subcarriers (423 kHz / 484 kHz). This eliminates BOM cost and layout complexity associated with external timing components.

How is the 64-bit UID programmed, and can it be changed?

Each LRIS2K-A1S/1GE unit ships with a factory-programmed, laser-fused 64-bit UID stored in ROM - immutable and guaranteed unique across all units. The UID cannot be rewritten, erased, or altered by any command, including Kill or password operations. This ensures absolute traceability and prevents cloning in high-security applications.

What antenna design guidelines apply to LRIS2K-A1S/1S/1GE?

The device uses a differential RF interface optimized for direct connection to planar loop antennas tuned to 13.56 MHz. Recommended antenna inductance is 1–2 µH with Q ≥ 30; parasitic capacitance must remain below 5 pF. ST Application Note AN4827 specifies exact matching network values and layout rules for inlay integration, including solder mask clearance and copper thickness constraints.

Can LRIS2K-A1S/1GE operate in environments with metal or liquid proximity?

Yes - but antenna design must compensate. When mounted on metal, a ferrite backplate ≥0.5 mm thick is required to shield eddy currents; for liquid immersion, a PTFE or polypropylene encapsulant with dielectric constant <2.2 minimizes detuning. ST's LRIS2K evaluation inlay (STEVAL-IDB003V1) demonstrates validated performance on aluminum surfaces and saline solutions up to 0.9% concentration.