Texas Instruments RI-TRP-RRHP-20

Overview

RI-TRP-RRHP-20 from Texas Instruments is a 23-mm glass-encapsulated, passive low-frequency RFID transponder operating at 134.2 kHz with 64-bit read-only EEPROM memory, 16-bit CRC-CCITT error detection, and FSK modulation (134.2 kHz / 123.2 kHz). It is designed for automotive immobilizer systems requiring tamperproof identification and high EMI immunity in harsh environments.

For engineers reviewing the RI-TRP-RRHP-20 datasheet, RI-TRP-RRHP-20 pinout, RI-TRP-RRHP-20 application, or RI-TRP-RRHP-20 equivalent, this transponder delivers verified field performance under DIN 40839/part4, supports ≤20 ms data transmission, operates from –40°C to +85°C, and requires no onboard power source - critical for secure, maintenance-free vehicle access control.

Technical Context

The RI-TRP-RRHP-20 implements a pulsed FM architecture that strictly separates charge (15–50 ms) and read phases to eliminate interference between powering and data transmission. Its resonant circuit comprises a ferrite core antenna and integrated capacitor, tuned to 134.2 kHz ±40 Hz with Q_op ≥62.

Data transmission uses NRZ-encoded FSK with fixed 16-cycle-per-bit timing: low bit (134.2 kHz, 119 µs nominal), high bit (123.2 kHz, 130 µs nominal), yielding 7.4–8.7 kbit/s read rate and full 128-bit telegram duration ≤20 ms. The device contains no external pins or terminals - it is a fully encapsulated, two-terminal resonant unit.

Key Specifications

Pinout & Package

RI-TRP-RRHP-20 is a hermetically sealed, two-terminal glass-encapsulated resonator with no external leads or solderable pins. Its functional terminals are the integrated ferrite-core antenna coil and internal resonance capacitor - electrically accessible only via inductive coupling. The package measures 23.0 mm diameter × 3.85 mm height and weighs 0.6 g.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar passive LF RFID transponder applications.

Compared with RI-TRP-WRHP and TK4100, RI-TRP-RRHP-20 uniquely combines factory-sealed 64-bit ID, CRC-CCITT validation, DIN 40839-compliant EMI robustness, and automotive-grade temperature endurance - making it the only choice for certified immobilizer and safety-critical authentication.

Availability

RI-TRP-RRHP-20 is available at Aetrix Electronics and suitable for automotive security systems, industrial asset tracking, secure access tokens, and maintenance-free identification applications requiring stable component supply across long product lifecycles.

Supply support for RI-TRP-RRHP-20 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

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and wireless technologies, with decades of innovation in automotive and industrial electronics.

RI-TRP-RRHP-20 belongs to TI's TIRIS™ family of low-frequency RFID transponders, engineered specifically for secure, batteryless identification in electromagnetically hostile environments like vehicles and factories.

FAQ

What is the operating frequency and tolerance of the RI-TRP-RRHP-20?

The RI-TRP-RRHP-20 operates at a nominal frequency of 134.2 kHz with a tolerance of ±40 Hz. This precise resonance is achieved via its integrated ferrite antenna and capacitor, enabling optimal energy transfer from TIRIS-compatible readers. The specification is verified across –40°C to +85°C and forms the basis for its 62+ quality factor and reliable read range in automotive applications.

Does the RI-TRP-RRHP-20 require a battery or external power source?

No, the RI-TRP-RRHP-20 is a fully passive device. It derives all operating energy from the reader's 134.2 kHz magnetic field during the 15–50 ms charge phase. The internal capacitor stores sufficient energy to power the IC and transmit the full 128-bit FSK-encoded telegram within ≤20 ms - eliminating batteries, wiring, and maintenance.

How is data integrity ensured in the RI-TRP-RRHP-20?

Data integrity in the RI-TRP-RRHP-20 is enforced by a 16-bit CRC-CCITT Block Check Character (BCC) computed over the 64-bit identification code. This BCC is transmitted alongside the ID in every 128-bit read telegram and validated by the reader - preventing false acceptance due to corruption from EMI, misreads, or signal degradation in noisy environments.

What environmental qualifications does the RI-TRP-RRHP-20 meet?

The RI-TRP-RRHP-20 is qualified to IEC 68-2-6 (vibration), IEC 68-2-27 (shock), and DIN 40839/part4 (automotive EMI immunity). It operates continuously from –40°C to +85°C, withstands 2 kV ESD (IEC 801-2), and retains data for 10 years after 100,000 programming cycles - all confirmed in TI's Total Quality Culture test regime.

Can the RI-TRP-RRHP-20 be reprogrammed or rewritten after factory programming?

No, the RI-TRP-RRHP-20 is a Read-Only (RO) transponder with factory-programmed, tamperproof 64-bit identification data stored in non-volatile memory. Unlike the R/W variant RI-TRP-WRHP, it contains no write interface or user-accessible memory - ensuring permanent, unalterable identity for security-critical applications like vehicle immobilization.