NXP Semiconductors HTMS1201FUG/AM,005

Overview

HTMS1201FUG/AM,005 from NXP Semiconductors is a contactless RFID transponder IC in the HITAG μ family, designed for ISO 11784/11785-compliant animal identification and industrial logistics. It integrates a 210 pF resonance capacitor (±3%), operates at 125 kHz, supports Transponder Talks First (TTF) and Reader Talks First (RTF) modes, and delivers up to 128-bit TTF data storage with 32-bit password protection.

For engineers reviewing the HTMS1201FUG/AM,005 datasheet, HTMS1201FUG/AM,005 pinout, HTMS1201FUG/AM,005 application, or HTMS1201FUG/AM,005 equivalent, this wafer-die transponder IC requires attention to its 550 µm × 550 µm die size, gold-bumped bond pads (LA/LB), EEPROM endurance (100,000 cycles), and mode-switching timing constraints (232.5 × TC window).

Technical Context

The HTMS1201FUG/AM,005 implements an ASK-modulated 125 kHz air interface with 5.2 kbit/s downlink (RWD→IC) and selectable 2/4/8 kbit/s uplink (IC→RWD) using Manchester or Bi-phase encoding. Its analog front-end includes integrated resonance capacitance and rectification circuitry enabling passive operation via inductive coupling-no external power or capacitors required.

It features a 128-bit memory organization (Table 5), with dedicated blocks for ISO 11784/11785 TTF data, user-configurable byte (FFh), and 32-bit password (FEh). Memory lock functionality and irreversible block locking ensure secure, tamper-resistant data retention for 10 years.

Key Specifications

Pinout & Package

HTMS1201FUG/AM,005 is supplied as a sawn, gold-bumped 8-inch wafer die (550 µm × 550 µm), not in a molded package. Only two bond pads-LA and LB-are electrically functional; all others are disconnected after dicing. LA and LB form the resonant LC interface terminals for inductive coupling to the reader antenna.

Key Features

Applications

Equivalent & Alternatives

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

Compared with HTMS1001FUG/AM, HTMS1201FUG/AM,005 offers identical electrical and functional behavior with enhanced process traceability, while HTMS8001FUG/AM requires hardware-level LC recalibration due to its higher integrated capacitance-making HTMS1201FUG/AM,005 the preferred choice for existing 210 pF-based reader systems.

Availability

HTMS1201FUG/AM,005 is available at Aetrix Electronics and suitable for animal identification, laundry automation, and brand protection applications requiring stable component supply, long-term lifecycle support, and wafer-level sourcing flexibility.

Supply support for HTMS1201FUG/AM,005 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 contactless identification technologies.

The HTMS1201FUG/AM,005 belongs to NXP's HITAG μ transponder IC product line, engineered specifically for cost-sensitive, high-volume LF RFID applications demanding ISO 11784/11785 compliance, small form factor, and robust operation in harsh physical environments.

FAQ

What is the function of the LA and LB terminals on HTMS1201FUG/AM,005?

The LA and LB terminals on HTMS1201FUG/AM,005 serve as the two connection points for the external antenna coil, forming the resonant LC circuit that enables passive power harvesting and bidirectional communication. These are the only electrically active bond pads-the remaining three pads (TEST, GND, VDD) are disconnected after dicing and have no functional role in the final HTMS1201FUG/AM,005 implementation.

Does HTMS1201FUG/AM,005 require an external capacitor for operation?

No, HTMS1201FUG/AM,005 does not require an external capacitor. It integrates a 210 pF resonance capacitor with ±3% tolerance directly on-die, which-when paired with an appropriately sized external coil-forms a self-contained 125 kHz resonant circuit meeting ISO 11785 requirements. This integration reduces bill-of-materials complexity and eliminates capacitor placement variability.

How is memory secured on HTMS1201FUG/AM,005?

HTMS1201FUG/AM,005 provides memory security through a 32-bit programmable password (stored in block FEh) and irreversible LOCK BLOCK commands for both the password block and user configuration block (FFh). Once locked, these blocks cannot be rewritten-even with correct password-ensuring permanent protection of critical identity and access parameters.

What are the key timing constraints for switching HTMS1201FUG/AM,005 from TTF to RTF mode?

Switching HTMS1201FUG/AM,005 from TTF to RTF mode requires the reader to interrupt the field for ≥5 ms, then transmit either the SOF pattern or the 5-bit SWITCH command (00011) within a strict 232.5 × TC window (where TC ≈ 134 ns at 7.45 kHz carrier). Failure to meet this timing window results in fallback to standard TTF operation.

Is HTMS1201FUG/AM,005 compatible with existing ISO 11785 readers?

Yes, HTMS1201FUG/AM,005 is fully compliant with ISO 11784 and ISO 11785 standards in TTF mode, including LSB-first bit transmission, CRC error checking, and 125 kHz ASK modulation. It interoperates seamlessly with certified ISO 11785 readers without firmware or hardware modification-provided the reader supports the standard 128-bit TTF frame format.