NXP Semiconductors SL2S1502FTBX

Overview

SL2S1502FTBX from NXP Semiconductors is a passive HF RFID IC compliant with ISO 18000-3 Mode 3 and EPC Class-1 HF standards, operating at 13.56 MHz. It integrates 240-bit EPC memory, 96-bit TID with unique 48-bit serial number, EAS functionality, 32-bit kill password, and supports up to 800 tags/s anti-collision. It powers entirely from reader's magnetic field and enables battery-free smart labels for logistics gateways.

For engineers reviewing the SL2S1502FTBX datasheet, SL2S1502FTBX pinout, SL2S1502FTBX application, or SL2S1502FTBX equivalent, key selection criteria include its XSON3 (SOT1122) package, 23.5 pF input capacitance, 13.56 MHz RF interface, EAS enablement via ConfigWord toggle, and compatibility with 424/848 kHz subcarrier return link modulation.

Technical Context

The SL2S1502FTBX implements a fully integrated analog RF interface with on-chip voltage regulation, demodulation, and load modulation circuitry - extracting power and clock directly from the 13.56 MHz magnetic field. Its digital controller handles ISO 18000-3 Mode 3 protocol stack, including Select/Inventory/Access command execution, anti-collision arbitration, and secure state transitions via 32-bit access password.

Memory architecture comprises four banks: reserved (64-bit kill/access passwords), EPC (240-bit), TID (96-bit with factory-locked serial), and EEPROM with 50-year data retention and 100,000 write cycles. The IC operates without external power and requires only an antenna connected between LA and LB terminals.

Key Specifications

Pinout & Package

XSON3 (SOT1122) plastic extremely thin small outline package; no leads; 3 terminals; body dimensions 1.0 × 1.45 × 0.5 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SL2S1402FTBX and SL2S1602FTBX, the SL2S1502FTBX strikes a balance between antenna flexibility and compact integration - its 23.5 pF Ci supports mid-size inlays used in pharmaceutical blister packs and reusable instrument trays without requiring extreme capacitor values or ultra-small coil geometries.

Availability

SL2S1502FTBX is available at Aetrix Electronics and suitable for healthcare supply chain, medical lab automation, and document tracking applications requiring stable component supply across multi-year production programs.

Supply support for SL2S1502FTBX 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

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with headquarters in Eindhoven, Netherlands.

The ICODE product family - including SL2S1502FTBX - was designed specifically for high-reliability passive HF RFID tagging in regulated environments such as pharma serialization, clinical diagnostics, and secure document issuance.

FAQ

What is the primary RF standard supported by the SL2S1502FTBX?

The SL2S1502FTBX fully supports ISO 18000-3 Mode 3 and EPC Class-1 HF v2.0.3 air interface protocols. This dual compliance ensures interoperability with commercial HF RFID infrastructure worldwide, including readers from Impinj, Alien Technology, and ThingMagic. The SL2S1502FTBX implements mandatory commands (Select, BeginRound, ACK, READ, WRITE, KILL) and optional features (BlockWrite, UMI, EAS) as defined in the standards - enabling drop-in integration into existing EPCglobal-certified systems without firmware modification.

How does the SL2S1502FTBX achieve power autonomy?

The SL2S1502FTBX derives all operating power from the reader's 13.56 MHz magnetic field via inductive coupling between its LA and LB terminals and an external antenna. An on-chip rectifier and voltage regulator convert RF energy into stable DC supply for the digital controller and EEPROM. No battery or external power source is required - the SL2S1502FTBX remains functional as long as it resides within the reader's electromagnetic field (up to 1.5 m gate width with optimized antenna). This enables maintenance-free, multi-decade deployments in sealed or disposable labels.

What memory organization does the SL2S1502FTBX use, and how is it accessed?

The SL2S1502FTBX organizes memory into four banks: Bank 00 (64-bit reserved for kill/access passwords), Bank 01 (240-bit EPC), Bank 10 (96-bit TID with locked 48-bit serial), and extended configuration space. Access follows ISO 18000-3 command sequences - Select filters populations, BeginRound initiates anti-collision, ACK identifies individual tags, and READ/WRITE operate on byte-aligned addresses. All memory is EEPROM-based with 50-year retention and 100,000 write cycles. The SL2S1502FTBX enforces security states: open (unprotected), secured (password-locked), and killed (irreversible disable).

Can the SL2S1502FTBX be used for Electronic Article Surveillance (EAS)?

Yes - the SL2S1502FTBX includes dedicated EAS functionality controlled via the ConfigWord register (bit 20Fh). When enabled, the IC responds to a specific Select + BeginRound + ACK sequence with its EPC, allowing detection by EAS gateways without backend database lookup. This makes the SL2S1502FTBX suitable for retail loss prevention, library book tracking, and secure facility access control where standalone alarm triggering is required. The EAS bit is toggled using the ChangeConfigWord command, which requires valid access password and secured-state entry - ensuring intentional activation only.

What is the significance of the 23.5 pF input capacitance in the SL2S1502FTBX datasheet?

The 23.5 pF typical input capacitance (Ci) between LA and LB terminals defines the IC's contribution to the antenna's resonant LC tank. When designing the matching network, this value must be subtracted from the target total capacitance (e.g., 33 pF) to determine the required external capacitor value (e.g., ~9.5 pF). Accurate Ci knowledge ensures optimal power transfer efficiency and maximum read range - deviations cause detuning, reduced sensitivity, or failure to power up. The SL2S1502FTBX's 23.5 pF Ci positions it between the 0 pF SL2S1402FTBX (for large inductance antennas) and 97 pF SL2S1602FTBX (for micro-coils), making it ideal for standard 50–100 mm diameter inlays.