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Home > Products > RF and Wireless > RFID Transponders, Tags

STMicroelectronics LRI64-W4/1GE

Name: LRI64-W4/1GE
Brand: STMicroelectronics
SKU: LRI64-W4/1GE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: LRI64-W4/1GE

Manufacturer:: STMicroelectronics

Category:: RFID Transponders, Tags

Package:

Datasheet:: LRI64-W4/1GE.pdf

Description:: RFID TAG R/W 13.56MHZ INLAY

Quantity:: RFQ Add To RFQ list

Payment:

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Inventory:2,100

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Product details

Overview

LRI64-W4/1GE from STMicroelectronics is a contactless 13.56 MHz RFID memory tag IC compliant with ISO 15693 and ISO 18000-3 Mode 1, featuring a 64-bit factory-programmed UID, 7 × 8-bit WORM user memory, and internal tuning capacitors (21 pF / 28.5 pF / 97 pF) for antenna matching - deployed in asset tagging, inventory management, and EAS-enabled retail systems.

For engineers reviewing the LRI64-W4/1GE datasheet, LRI64-W4/1GE pinout, LRI64-W4/1GE application, or LRI64-W4/1GE equivalent, key selection considerations include its 26 Kbit/s Manchester-coded uplink, "1-out-of-4" PPM downlink, software-controllable EAS capability, and 40+ year data retention in WORM blocks - critical for long-lifecycle item identification.

Technical Context

The LRI64-W4/1GE implements a passive RF interface with no internal power source: energy harvesting occurs via 13.56 MHz ±7 kHz carrier coupling to an external antenna connected across AC0/AC1 pads. It supports only high-data-rate mode (26 Kbit/s) per ISO 15693, rejecting all legacy low-rate protocols.

Communication follows Reader-Talks-First (RTF) timing: VCD initiates with Inventory or Read Block commands; LRI64 responds using load modulation with 423 kHz subcarrier and Manchester coding. Memory access enforces strict WORM semantics - each of the seven user blocks locks permanently after first valid write, with no erase or reprogram capability.

Key Specifications

Parameter	Value and Actual Design Meaning
Carrier frequency	13.56 MHz ±7 kHz - matches ISO 15693/18000-3 Mode 1 field tolerance for reliable coupling in vicinity-range readers.
Data rate (VCD→LRI64)	26 Kbit/s using "1-out-of-4" pulse position modulation - enables robust low-SNR downlink with built-in error resilience.
Data rate (LRI64→VCD)	26 Kbit/s using Manchester coding + 423 kHz subcarrier - ensures deterministic timing and compatibility with standard ISO 15693 readers.
Memory structure	15 × 8-bit blocks: blocks 0–7 store 64-bit UID (factory-written), blocks 10–14 are WORM (7 × 8 bits) - prevents tampering while enabling one-time configuration.
Programming time	7 ms typical per block - defines minimum inter-command delay for Write Block operations in high-throughput tag encoding.
Data retention	>40 years - guarantees UID and WORM content integrity over decades without battery or refresh circuitry.
EAS capability	Software-controlled electrical article surveillance flag - allows dynamic activation/deactivation of anti-theft response without hardware modification.

Pinout & Package

Package: UFDFPN8 (MLP8), 2 × 3 mm² ultra-thin fine-pitch dual flat no-lead, RoHS-compliant ECOPACK®.

Pin/Terminal	Circuit Role	Design Meaning
AC0	Antenna coil terminal	Direct bond pad for one end of external loop antenna; forms resonant LC tank with internal tuning capacitor.
AC1	Antenna coil terminal	Direct bond pad for opposite end of external loop antenna; completes RF energy harvesting path.
Pins 3–8	Not connected (n/c)	No internal connection; electrically floating - must remain unconnected in PCB layout and bonding.

Key Features

Feature	Design Value
ISO 15693 & ISO 18000-3 Mode 1 compliance	Guarantees interoperability with certified industrial and retail readers without protocol translation or firmware adaptation.
Factory-programmed 64-bit UID	Enables globally unique identification at system level - eliminates need for host-side UID generation or database synchronization.
7-block WORM memory	Supports secure one-time provisioning of calibration data, manufacturing lot codes, or cryptographic keys without risk of overwrite.
Internal tuning capacitors	Three selectable values (21 pF / 28.5 pF / 97 pF) simplify antenna matching across diverse form factors and materials.
Software-controlled EAS	Allows remote enable/disable of anti-theft response via standard ISO command set - eliminates dedicated EAS hardware.

Applications

Asset Tracking Tag

Retail Inventory Label

Use Scenario: High-volume scanning of palletized goods in warehouse receiving docks using handheld or portal readers.

IC Role / Device Role / Timing Role: Passive memory tag providing UID and batch ID via ISO 15693 Inventory and Read Block commands.

Use Value: 26 Kbit/s Manchester uplink ensures rapid multi-tag interrogation in dense environments; WORM blocks store immutable lot traceability data.

Use Scenario: Shelf-level item monitoring in supermarkets, with periodic automated reads to update stock levels and detect shrinkage.

IC Role / Device Role / Timing Role: ISO-compliant vicinity tag responding to VCD-initiated Read Block and Get_System_Info commands.

Use Value: Software-controllable EAS flag enables real-time theft deterrence activation during checkout; 40-year retention secures lifetime product identity.

Industrial Tool Authentication

Library Media Identification

Use Scenario: Verifying authorized tool usage in CNC machining cells by reading embedded tags before job execution.

IC Role / Device Role / Timing Role: Tamper-resistant WORM tag storing tool calibration date and maintenance history in locked blocks.

Use Value: Permanent write-once storage prevents unauthorized modification of critical operational parameters; UID ensures tool-specific firmware binding.

Use Scenario: Self-checkout kiosks and automated sorting conveyors reading media tags (DVDs, books) in public libraries.

IC Role / Device Role / Timing Role: Contactless memory device delivering UID and DSFID via ISO 15693 Inventory responses.

Use Value: Internal tuning capacitors accommodate varied tag substrates (plastic, paper, laminate); 13.56 MHz operation avoids interference with Wi-Fi/Bluetooth bands.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SL2 ICS20	Same ISO 15693 compliance, but 128-bit UID and 128-bit WORM; no internal tuning caps - requires external matching network.	Higher memory capacity suits complex asset hierarchies; lacks integrated EAS control.	Select when extended UID/WORM space is required and antenna design permits external tuning components.
Tag-it HF-I Plus	ISO 15693-compliant with 64-bit UID and 128-bit user memory, but supports both high/low data rates; no EAS feature.	Better suited for mixed-reader environments requiring backward compatibility with legacy 6.62 Kbit/s readers.	Choose where multi-rate reader support is mandatory and EAS functionality is handled externally.

Compared with SL2 ICS20 and Tag-it HF-I Plus, the LRI64-W4/1GE offers integrated antenna tuning and software EAS in a minimal 2×3 mm footprint - optimizing for cost-sensitive, single-standard deployments where long-term WORM integrity is prioritized over memory expansion or multi-rate flexibility.

Availability

LRI64-W4/1GE is available at Aetrix Electronics and suitable for asset tracking, retail inventory labeling, and industrial tool authentication requiring stable component supply across extended production lifecycles.

Supply support for LRI64-W4/1GE 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 analog ICs - with broad expertise in RFID and NFC technologies.

The LRI64 belongs to ST's contactless memory tag IC product line, designed specifically for ISO 15693/18000-3 Mode 1-compliant, battery-free identification in industrial, logistics, and retail applications.

FAQ

Is the LRI64-W4/1GE still in active production?

No - STMicroelectronics has marked the LRI64-W4/1GE as obsolete per official documentation. However, Aetrix Electronics maintains limited legacy inventory with full traceability and provides lifecycle coordination support for ongoing production programs that rely on this part.

Can the 64-bit UID be rewritten after manufacturing?

No - the UID is factory-programmed during wafer test and permanently stored in blocks 0–7. While ST reserves partial UID fields for customer-defined content upon special request, no field-reprogrammable mechanism exists; the UID is read-only during normal operation.

What antenna design guidance applies to the AC0/AC1 terminals?

AC0 and AC1 require direct wire-bonding to a printed or etched loop antenna tuned to 13.56 MHz. The internal 21/28.5/97 pF capacitor selection must match the antenna's parasitic capacitance - ST recommends using AN2849 or ST25DV evaluation tools for impedance matching verification.

Does the LRI64-W4/1GE support password protection or encryption?

No - the LRI64-W4/1GE implements no cryptographic features. Security relies solely on physical WORM locking and UID uniqueness. Access control is enforced at the system level via reader-side logic; all commands (Read/Write/Inventory) execute without authentication.

LRI64-W4/1GE Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: LRI64

Packaging:: Bulk

Product Status:: Obsolete

Style:: Inlay

Technology:: Passive

Frequency:: 13.56MHz

Memory Type:: Read/Write

Writable Memory:: 120b (User)

Standards:: ISO 15693, ISO 18000-3

Operating Temperature:: -20°C ~ 85°C

Size / Dimension:: 2.992" L x 1.772" W (76.00mm x 45.00mm)

LRI64-W4/1GE FAQ

1.How can I place an order for LRI64-W4/1GE through Aetrix?

Please submit a Request for Quotation (RFQ) for LRI64-W4/1GE 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 LRI64-W4/1GE reliable?

The price and inventory of LRI64-W4/1GE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LRI64-W4/1GE is usually 5 days.

3.What payment methods are accepted for LRI64-W4/1GE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LRI64-W4/1GE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for LRI64-W4/1GE?

LRI64-W4/1GE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your LRI64-W4/1GE 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 LRI64-W4/1GE?

For technical support, including LRI64-W4/1GE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LRI64-W4/1GE requirements.

6.How does Aetrix verify that LRI64-W4/1GE is sourced from the original manufacturer or authorized distributors?

All LRI64-W4/1GE 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 LRI64-W4/1GE meets industry standards.

7.What is the process for return or replacement of LRI64-W4/1GE?

All LRI64-W4/1GE units undergo pre-shipment inspection (PSI). If there is an issue with LRI64-W4/1GE, 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 LRI64-W4/1GE part is unused and in its original packaging.

Return procedure for LRI64-W4/1GE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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