NXP Semiconductors HTSMOH4802EVJ

Overview

HTSMOH4802EVJ from NXP Semiconductors is a contactless RFID transponder IC in the HITAG S family, operating at 100–150 kHz with integrated 210 pF resonance capacitance (±5%), 2048-bit EEPROM memory, 48-bit encrypted authentication, and full ISO 11784/85 compliance for animal identification systems.

For engineers reviewing the HTSMOH4802EVJ datasheet, HTSMOH4802EVJ pinout, HTSMOH4802EVJ application, or HTSMOH4802EVJ equivalent, this page delivers verified technical context, memory organization details, secure authentication protocol behavior, and real-world deployment constraints for industrial RFID tag design and animal ID module integration.

Technical Context

The HTSMOH4802EVJ implements an ASK-based inductive coupling interface with Reader Talks First (RTF) and optional Transponder Talks First (TTF) modes, supporting data rates of 2–8 kbit/s from transponder to reader and 5.2 kbit/s in reverse direction. Its digital core includes anticollision sequencing for up to 100 tags within 3.2 seconds and Manchester/Bi-phase modulation for reliable field communication.

Memory access is organized into 64 pages of 4 bytes each (32 bits/page), with configurable block- or page-level read/write operations. Security is enforced via 32-bit UID, 48-bit secret key encryption, and Secure Memory Lock functionality-enabling authenticated mode where challenge-response sequences validate transponder identity before enabling write access.

Key Specifications

Pinout & Package

HTSMOH4802EVJ is housed in a PLLMC (Plastic Leadless Module Carrier) package, also referenced as SOT500-2, with two terminals (IN1 and IN2) forming the RF interface loop connection point for inductive coupling. No external power supply or biasing is required-the device derives operating energy directly from the reader's magnetic field.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar contactless transponder applications.

Compared with HTSMOH5602EV, HTSMOH4802EVJ offers 8× more memory for rich data logging while sharing pinout and protocol; versus HTSH4801ETK, it trades surface-mount flexibility for optimized module carrier form factor ideal for pre-assembled RFID tags.

Availability

HTSMOH4802EVJ is available at Aetrix Electronics and suitable for animal identification, laundry automation, beer keg logistics, pigeon race timing, and brand protection applications requiring stable component supply and long-term lifecycle support.

Supply support for HTSMOH4802EVJ 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 deep expertise in RFID and NFC technologies.

The HITAG S product line was designed specifically for high-reliability, low-cost contactless identification in regulated environments-including ISO 11784/85 animal ID and ISO 18000-2 item management-leveraging proven inductive coupling architecture and hardened security primitives.

FAQ

What is the exact memory capacity and organization of HTSMOH4802EVJ?

HTSMOH4802EVJ contains 2048 bits of EEPROM memory, organized into 64 pages of 4 bytes each (32 bits per page). It supports both page-level and block-level (4-page) read/write operations. This structure enables efficient partial updates-for example, writing only sensor calibration data to Page 0x3C without affecting UID in Page 0x00-while maintaining full ISO 11784/85 compatibility.

Does HTSMOH4802EVJ require an external capacitor for resonant operation?

No, HTSMOH4802EVJ integrates a 210 pF resonance capacitor with ±5% tolerance across full production, eliminating the need for external capacitors. This simplifies tag design, reduces bill-of-materials cost, and improves manufacturing yield-especially critical in high-volume animal ID tag production where coil winding tolerances must be tightly controlled.

How does the authentication protocol work in HTSMOH4802EVJ?

HTSMOH4802EVJ implements a 48-bit encrypted challenge-response protocol: after UID selection, the reader sends a 32-bit random number and 32-bit secret stream; the transponder computes a response using its stored 48-bit key and returns it encrypted. Successful verification unlocks write access. This prevents cloning and ensures only authorized readers can modify memory contents.

Is HTSMOH4802EVJ compatible with existing HITAG 1 and HITAG 2 reader infrastructure?

Yes, HTSMOH4802EVJ maintains backward compatibility with HITAG 1 and HITAG 2 reader hardware and protocol stacks. Its command set-including UID REQUEST, AC SEQUENCE, SELECT (UID), and READ PAGE-is fully aligned with earlier generations, allowing seamless upgrade of installed base systems without reader firmware changes or antenna redesign.

What are the environmental ratings and reliability specifications for HTSMOH4802EVJ?

HTSMOH4802EVJ is rated for junction temperatures from −25 °C to +85 °C, supports 100,000 write/erase cycles, and guarantees 10 years of non-volatile data retention at ≤55 °C ambient. It meets JEDEC JESD22-A114-AB Human Body Model ESD rating of ±2 kV, making it suitable for outdoor animal tagging and industrial laundry environments with frequent electrostatic discharge events.