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Texas Instruments RI-STU-MRD1-30
- Part No.:
- RI-STU-MRD1-30
- Manufacturer:
- Texas Instruments
- Category:
- RFID Reader Modules
- Package:
- 38.3mm x 29.3mm 13.5mm
- Datasheet:
-
RI-STU-MRD1-30.pdf
- Description:
- RFID READER R/W 134.2KHZ
- Quantity:
- Payment:
- Shipping:
Inventory:2,490
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Product details
Overview
RI-STU-MRD1-30 from Texas Instruments is a TIRIS™ low-frequency (134.2 kHz) micro-reader module designed for contactless identification systems. It integrates RF excitation, transponder protocol handling, and TTL-level serial communication (9600 baud, 8N1), supporting read-only, read/write, MPT, and SAMPT transponders with 50 ms power burst duration and wired/wireless synchronization.
For engineers reviewing the RI-STU-MRD1-30 datasheet, RI-STU-MRD1-30 pinout, RI-STU-MRD1-30 application, or RI-STU-MRD1-30 equivalent, this module serves as a complete embedded LF RFID reader subsystem-requiring only a 47 µH antenna, dual 5 V supplies (VSL/VSP), and minimal host controller logic for command-driven operation in access control, asset tracking, and industrial ID systems.
Technical Context
The RI-STU-MRD1-30 implements a dedicated ASIC-based RF front-end with integrated power stage and microcontroller, operating at 134.2 kHz using a fixed 47 µH low-Q antenna (Q = 10–20) to eliminate tuning requirements. Its serial interface uses half-duplex TTL-level signaling with XON/XOFF handshake support and strict 41-byte frame limit.
It supports three operational modes: idle (command-waiting), triggered single-read (via RDEN− pulse), and continuous read (via CRDM). Synchronization-wired (SYNC/RDEN−) or wireless (WLSC)-adds ~20 ms cycle overhead and ensures reliable multi-reader coexistence without signal collision in dense deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Frequency | 134.2 kHz - Fixed carrier frequency optimized for TIRIS™ LF transponders; no tuning required with specified 47 µH antenna. |
| Power Burst Duration | 50 ms - Standard excitation window per read/program cycle; configurable via command field for extended bursts. |
| Serial Interface | TTL-level UART at 9600 baud, 8N1 - Direct connection to microcontroller GPIO; RS232/RS422 requires external driver. |
| Supply Requirements | Dual 5 V inputs: VSL (logic, 4–5.5 V) and VSP (output stage, 4–5.5 V); SMPS prohibited below 200 kHz fundamental frequency. |
| Transponder Support | RO, R/W, MPT, SAMPT - Full native protocol stack per TIRIS™ specification; includes FBCC/DBCC calculation and selective page operations. |
| Read Rate (unsync) | ~10 readouts/sec - Determined by 50 ms burst + internal processing; synchronized mode adds ~20 ms latency per cycle. |
| Antenna Interface | 47 µH, Q = 10–20 - Low-Q design enables robust operation across temperature and mechanical variance; ANTCAP allows inductance adaptation. |
Pinout & Package
RI-STU-MRD1-30 is a 30-pin through-hole plug-in module with dual-row 0.1″ pitch layout. Mechanical dimensions are provided in Figure 3-1 (top/front/side views, mm). The module mounts directly to an adapter board and requires no solder reflow profile-designed for manual insertion and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (SYNC) | Wired sync output | Open-drain VSL-level signal active during full RF cycle; used to coordinate multiple readers on shared bus. |
| 2 (RDEN−) | Sync/trigger input | Active-high input for wired sync hold-off or 100 µs pulse-triggered single read; high-impedance, requires 27 kΩ pull-down when unused. |
| 4 (RESET−) | Active-low reset | Asynchronous reset; min. 1 ms pulse; internal pull-up allows floating if unused; 28–132 ms recovery before serial commands accepted. |
| 5 (RXD) / 6 (TXD) | Half-duplex UART I/O | TTL-level (0 V / VSL) serial interface; 9600 baud, 8N1; supports XON/XOFF flow control; no hardware handshaking. |
| 16 (ANT1) / 19 (ANT2) | Antenna terminals | Connect 47 µH low-Q coil between ANT1 and ANT2; ANTCAP (pin 17) enables parallel capacitance for inductance scaling. |
| 22 (VSP) / 24 (VSL) | Power inputs | VSP powers RF output stage; VSL powers logic/microcontroller; separate decoupling recommended even with common 5 V source. |
| 26 (CRDM) | Continuous read enable | Active-high input forces charge-only continuous read mode; serial commands retain priority and preempt CRDM state. |
| 27 (WLSC) | Wireless sync control | Active-high enables wireless sync; overridden temporarily by serial command; must be pulled to VSL or GND via 27 kΩ resistor. |
| 29 (OKT) / 30 (STAT) | Status outputs | OKT pulses high (~60 ms) on valid transponder read; STAT goes low during RF transmission-both drive LEDs directly. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated TIRIS™ Protocol Engine | Hardware-accelerated support for RO, R/W, MPT, and SAMPT transponders-including FBCC/DBCC generation and selective page locking. |
| No-Tune Antenna Interface | Optimized for 47 µH, Q = 10–20 coils; eliminates calibration labor and improves production yield across environmental variance. |
| Dual-Supply Architecture | Separate VSL (logic) and VSP (RF output) rails prevent noise coupling; enables clean digital control of high-current RF stage. |
| Multi-Reader Synchronization | Wired (SYNC/RDEN−) and wireless (WLSC) modes ensure deterministic timing in stacked or adjacent reader deployments. |
| Command-Driven Operational Modes | Idle, single-triggered, and continuous read modes-all selectable via pin or serial command; CRDM and RDEN− inputs retain priority over serial. |
Applications
| Access Control System | Industrial Asset Tracking |
|---|---|
|
Use Scenario: Door-mounted reader verifies employee badge ID before granting entry. IC Role / Device Role / Timing Role: Standalone LF RFID reader subsystem handling transponder excitation, demodulation, and protocol decoding. Use Value: 50 ms burst duration and OKT/STAT outputs enable fast visual feedback and deterministic door actuation timing. |
Use Scenario: Forklift-mounted reader logs pallet ID during loading/unloading in warehouse. IC Role / Device Role / Timing Role: Embedded reader module interfacing with vehicle MCU via TTL UART; operates in continuous Line Mode. Use Value: Continuous read with Line Mode ensures every valid ID is reported-no ID dropouts during rapid movement near antenna. |
| Automotive Keyless Entry | Tool Crib Management |
|
Use Scenario: Vehicle-side reader detects proximity of authorized key fob to unlock doors. IC Role / Device Role / Timing Role: Low-power LF exciter with wireless synchronization to avoid interference from nearby vehicles. Use Value: WLSC-enabled wireless sync prevents false triggers when multiple cars park adjacent, maintaining secure proximity detection. |
Use Scenario: Tool cabinet reader validates technician ID and tool return status upon checkout. IC Role / Device Role / Timing Role: Reader module integrated into cabinet controller; uses MPT protocol for encrypted tool data storage. Use Value: Native MPT/SAMPT support enables secure, write-protected tool usage logging without external crypto IC. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LF RFID reader applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| RI-TRP-WM2B | Same TIRIS™ family; surface-mount variant with integrated antenna matching network and 3.3 V logic compatibility. | Designed for space-constrained PCB integration; lacks direct RDEN−/CRDM pin control-relies entirely on serial commands. | Select RI-TRP-WM2B for compact, automated assembly where board real estate is limited and host MCU handles all sequencing. |
| TRF7960ARHBT | TI multi-protocol NFC/LF HF reader IC (13.56 MHz + 125 kHz); programmable analog front-end; requires external MCU and antenna tuning. | Supports ISO14443A/B, FeliCa, and TIRIS™ but demands full firmware development; no built-in transponder protocol engine. | Select TRF7960ARHBT when future multi-frequency support or custom protocol extensions are required-accepting higher BOM and firmware cost. |
Compared with RI-STU-MRD1-30, RI-TRP-WM2B reduces mechanical footprint and simplifies power design but removes direct hardware trigger flexibility; TRF7960ARHBT offers broader frequency coverage and configurability at the expense of added system complexity and development effort.
Availability
RI-STU-MRD1-30 is available at Aetrix Electronics and suitable for access control systems, industrial asset tracking, and automotive keyless entry requiring stable component supply, long-term lifecycle assurance, and legacy TIRIS™ ecosystem compatibility.
Supply support for RI-STU-MRD1-30 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in industrial, automotive, and communications markets.
The RI-STU-MRD1-30 belongs to TI's TIRIS™ family of dedicated LF RFID reader modules, engineered for plug-and-play integration into secure identification systems without requiring RF expertise or protocol stack development.
FAQ
What is the primary function of the RI-STU-MRD1-30?
The RI-STU-MRD1-30 is a complete TIRIS™ low-frequency (134.2 kHz) RFID micro-reader module that performs RF excitation, transponder communication, and protocol handling for RO, R/W, MPT, and SAMPT tags. It delivers decoded ID data via TTL UART and provides hardware status signals (OKT/STAT) for direct LED or MCU monitoring-eliminating the need for external RF or protocol firmware development in the host system.
Does the RI-STU-MRD1-30 require antenna tuning?
No, the RI-STU-MRD1-30 is designed for use with a 47 µH, low-Q (Q = 10–20) antenna and includes on-board resonance capacitance. This fixed LC configuration eliminates manual tuning, ensuring consistent performance across temperature, humidity, and mechanical stress-critical for industrial and automotive deployments where field calibration is impractical.
Can the RI-STU-MRD1-30 operate with a single 5 V supply?
Yes, the RI-STU-MRD1-30 accepts two 5 V inputs-VSL for logic and VSP for the RF output stage-but both can be sourced from the same regulated 5 V rail. However, TI recommends separate decoupling paths from a common bulk capacitor to minimize noise coupling between digital and RF sections, especially in electrically noisy environments.
How does synchronization work on the RI-STU-MRD1-30?
The RI-STU-MRD1-30 supports wired synchronization via SYNC and RDEN− pins (pulse-driven coordination) and wireless synchronization via the WLSC pin (field-coupled timing alignment). Wired sync adds ~20 ms overhead and ensures deterministic multi-reader timing; wireless sync avoids wiring but requires careful antenna placement to prevent transponder-mediated cross-talk between adjacent units.
What transponder protocols does the RI-STU-MRD1-30 support natively?
The RI-STU-MRD1-30 natively supports all standard TIRIS™ transponder types: Read-Only (RO), Read/Write (R/W), Multi-Page Transponder (MPT), and Secure Access Multi-Page Transponder (SAMPT). It implements full protocol stacks-including FBCC/DBCC calculation, selective page addressing, lock commands, and power burst parameterization-without host MCU intervention.
RI-STU-MRD1-30 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 2000
- Package/Case:
- 38.3mm x 29.3mm 13.5mm
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Read/Write
- Frequency:
- 134.2kHz
- Interface:
- TTL
- Standards:
- ISO 11785
- Supplier Device Package:
- -
RI-STU-MRD1-30 FAQ
1.How can I place an order for RI-STU-MRD1-30 through Aetrix?
Please submit a Request for Quotation (RFQ) for RI-STU-MRD1-30 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 RI-STU-MRD1-30 reliable?
The price and inventory of RI-STU-MRD1-30 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RI-STU-MRD1-30 is usually 5 days.
3.What payment methods are accepted for RI-STU-MRD1-30?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RI-STU-MRD1-30 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for RI-STU-MRD1-30?
RI-STU-MRD1-30 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your RI-STU-MRD1-30 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 RI-STU-MRD1-30?
For technical support, including RI-STU-MRD1-30 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RI-STU-MRD1-30 requirements.
6.How does Aetrix verify that RI-STU-MRD1-30 is sourced from the original manufacturer or authorized distributors?
All RI-STU-MRD1-30 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 RI-STU-MRD1-30 meets industry standards.
7.What is the process for return or replacement of RI-STU-MRD1-30?
All RI-STU-MRD1-30 units undergo pre-shipment inspection (PSI). If there is an issue with RI-STU-MRD1-30, 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 RI-STU-MRD1-30 part is unused and in its original packaging.
Return procedure for RI-STU-MRD1-30:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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