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HomeProductsRF/IF and RFIDRF Receiver, Transmitter, and Transceiver Finished UnitsFOBLOQF-4T2
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FOBLOQF-4T2 - RF Solutions

Manufacturer Part Number
FOBLOQF-4T2
Manufacturer
RF Solutions
Allelco Part Number
98D-FOBLOQF-4T2
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
46,714 pcs available, New & Original
Parts Description
KEYFOB TRANSMITTER FM 2CH
Package
Bag
Data sheet
FOBLOQF-4T2.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 46714
  • Unit Price: $18.279
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $18.279 $18.28
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

FOBLOQF-4T2 Tech Specifications
RF Solutions - FOBLOQF-4T2 technical specifications, attributes, parameters and parts with similar specifications to RF Solutions - FOBLOQF-4T2

Product Attribute Attribute Value
Manufacturer RF Solutions
Voltage - Supply 2.3V ~ 3.3V
Series KEELOQ®
Sensitivity -
Power - Output -
Package Bag
Modulation or Protocol KEELOQ
Product Attribute Attribute Value
Interface Digital
Function Remote Control System
Frequency 433.92MHz
Features 150m Range
Data Rate (Max) -
Base Product Number FOBLOQF
Applications General Purpose

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) Not Applicable
ECCN 5A991G
HTSUS 8525.50.3040

Frequently Asked Questions(FAQ)

What are the key design considerations when integrating the FOBLOQF-4T2 into a battery-powered access control system?
The FOBLOQF-4T2 operates within a narrow supply voltage range of 2.3V to 3.3V, making it suitable for single-cell Li-ion or two alkaline/NiMH cells in series. Its low-voltage operation supports extended battery life, but designers must ensure stable regulation under load transients, especially during RF transmission bursts. The KEELOQ hopping protocol adds overhead to power management due to frequent key generation and transmission cycles, so duty cycling and sleep-mode coordination with the host receiver are critical to achieving multi-year operation from a CR2032-type cell.
How does the 433.92MHz carrier frequency of the FOBLOQF-4T2 influence antenna design and regulatory compliance in different regions?
The FOBLOQF-4T2’s use of 433.92MHz places it within the ISM band allocated in Europe (ETSI EN 300 220) and parts of Asia, but it is not permitted for unlicensed use in North America, where 315MHz or 915MHz are typical alternatives. This restricts deployment geography unless paired with a region-specific receiver. Antenna matching networks must be tuned to 433.92MHz with consideration for enclosure materials and user hand effects, which can detune a λ/4 monopole by 10–15%. A properly matched antenna is essential to achieve the rated 150m line-of-sight range.
Can the FOBLOQF-4T2 be used in a multi-user environment without risk of code collision or replay attacks?
The FOBLOQF-4T2 leverages the KEELOQ cryptographic protocol, which uses a 64-bit seed and 32-bit rolling code to prevent replay attacks. Each transmission includes a unique code derived from a secret key stored in the fob and receiver, making brute-force or code-grabbing attacks impractical. However, system-level design must ensure the receiver implements proper synchronization and resynchronization windows—typically ±16 codes—to avoid desynchronization during missed transmissions, especially in high-density deployments.
What factors determine whether the FOBLOQF-4T2’s 150m range is achievable in real-world conditions?
The 150m range specification assumes ideal line-of-sight conditions at 433.92MHz with matched antennas and minimal interference. In practice, building materials, foliage, and RF noise from other ISM devices can reduce effective range by 50–70%. Urban environments with concrete walls or metal structures may limit range to under 50m. Additionally, the fob’s compact size constrains antenna efficiency; users holding the device may detune the antenna, further reducing performance. Link budget analysis should include a 20–30dB margin for non-ideal propagation.
How does the FOBLOQF-4T2 compare to similar 2-channel keyfobs using fixed-code protocols in terms of security and interoperability?
Unlike fixed-code transmitters that repeat the same data packet, the FOBLOQF-4T2 employs dynamic KEELOQ encoding, making it resistant to code-sniffing and replay attacks. Fixed-code alternatives are vulnerable to simple capture-and-retransmit exploits, requiring additional hardware or software layers for security. However, KEELOQ-based systems like the FOBLOQF-4T2 require pre-shared keys and secure enrollment procedures, limiting plug-and-play interoperability. This trade-off favors security-critical applications such as garage door openers or industrial access over cost-sensitive, low-risk uses.
What are the implications of the FOBLOQF-4T2’s digital interface for microcontroller integration in a custom receiver design?
The FOBLOQF-4T2 outputs a digitally modulated ASK/OOK signal at 433.92MHz, requiring a compatible RF receiver IC (e.g., a superheterodyne or low-IF demodulator) to decode the KEELOQ data stream. The digital interface does not include a baseband processor, so the host MCU must handle demodulated data parsing, rolling code validation, and decryption using the shared KEELOQ algorithm. This demands sufficient processing power and secure key storage, often necessitating a dedicated security IC or MCU with hardware AES support to prevent key extraction.
Is the FOBLOQF-4T2 suitable for use in safety-critical applications such as emergency stop systems or medical device control?
While the FOBLOQF-4T2 provides robust encryption and reliable short-range communication, it lacks formal certification for functional safety standards such as IEC 61508 or ISO 13849. Its use in safety-critical systems would require extensive system-level risk assessment, redundancy, and fail-safe mechanisms beyond the fob’s capabilities. Additionally, the absence of acknowledgment protocols or link quality feedback means the transmitter cannot confirm command reception, introducing potential failure modes unacceptable in life-critical applications.
How does the moisture sensitivity and packaging of the FOBLOQF-4T2 affect long-term reliability in outdoor or high-humidity environments?
The FOBLOQF-4T2 is supplied in a bag with no specified Moisture Sensitivity Level (MSL), indicating it is not prone to moisture-induced damage during assembly. However, the end-product enclosure design must provide IP-rated sealing to protect internal components, as prolonged exposure to humidity or condensation can degrade the PCB, battery contacts, and RF performance. The lack of conformal coating or hermetic sealing in the base module means environmental resilience depends entirely on the final housing and gasketing.
What design trade-offs exist between using the FOBLOQF-4T2 and a Bluetooth Low Energy (BLE) alternative for a two-channel remote control application?
The FOBLOQF-4T2 offers lower power consumption during transmission and simpler RF certification in regions allowing 433.92MHz, with no smartphone dependency. In contrast, BLE modules support bidirectional communication, over-the-air updates, and smartphone integration but require more complex protocol stacks and higher average power. For applications needing only one-way, secure actuation (e.g., gate openers), the FOBLOQF-4T2 provides a simpler, lower-BOM solution. However, BLE enables diagnostics and user feedback, which the FOBLOQF-4T2 cannot support due to its unidirectional architecture.
Can multiple FOBLOQF-4T2 units be enrolled to a single receiver without interference or cross-talk?
Yes, the KEELOQ system supports multiple transmitters per receiver through unique secret keys assigned during enrollment. Each FOBLOQF-4T2 must be programmed with a distinct key and system ID to prevent unauthorized access. The receiver stores these keys securely and validates incoming codes against the enrolled set. However, simultaneous transmissions from multiple fobs can cause packet collisions, so applications should avoid scenarios requiring concurrent button presses. Proper enrollment procedures and anti-collision timing in the host firmware mitigate this risk.

Parts with Similar Specifications

The three parts on the right have similar specifications to RF Solutions FOBLOQF-4T2

Product Attribute FOBLOQF-4T1 FOBLOQF-4T3 FOBLOQF-4S2 FOBLOQA-4T2
Part Number FOBLOQF-4T1 FOBLOQF-4T3 FOBLOQF-4S2 FOBLOQA-4T2
Manufacturer RF Solutions RF Solutions RF Solutions RF Solutions
Features - - - Simultaneous Sampling
Base Product Number - DAC34H84 MAX500 ADS62P42
Function - - - -
Data Rate (Max) - - - -
Interface - - - -
Voltage - Supply - - - -
Power - Output - - - -
Series - - - -
Applications - - - -
Modulation or Protocol - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Sensitivity - - - -
Frequency - - - -

FOBLOQF-4T2 Datasheet PDF

Download FOBLOQF-4T2 pdf datasheets and RF Solutions documentation for FOBLOQF-4T2 - RF Solutions.

Datasheets
FOBLOQF Remote Control.pdf

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Customer Reviews

Evaluation: 10 Articles

  • Nikh***ech
    Aug 13, 2026

    Great low-power MCU for portable equipment. Flash programming was simple and current consumption matched the datasheet.

  • Embe***dMotion
    Aug 5, 2026

    Purchased this DSP controller for a motor control application. Stable processing performance and very good response under varying loads.

  • FPGA***dio
    Jul 30, 2026

    This FPGA handled our logic design without any surprises. Configuration completed quickly and timing met the project requirements.

  • Nord***mbedded
    Jul 20, 2026

    Reliable FPGA with predictable behavior. Configuration and testing went smoothly, making development faster than expected.

  • Arch***ct
    Jul 15, 2026

    Used this device in a communication signal processing board. Stable timing and no unexpected issues during implementation.

  • FPGA***lorer88
    Jul 7, 2026

    The FPGA works properly and all functions operate as expected. Documentation required some additional research, but overall it is a usable device for smaller signal processing projects.

  • Nath***oleman
    Jun 29, 2026

    Used this sensor component in an industrial automation setup. Detection accuracy was consistent and installation was straightforward.

  • Emil***rperTech
    Jun 23, 2026

    Works exactly as described. I used it as a USB-to-SPI bridge in a small MCU development project and communication was stable from the first setup.

  • Liam***terTech
    Jun 15, 2026

    Used this CPLD in a logic control project. Programming was straightforward and signal timing matched the design requirements.

  • Nath***rooks
    Jun 11, 2026

    Installed this power component in a converter board. Output remained stable under different load conditions and thermal performance was better than expected.

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Shipment

Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

  1. Global Common Shipment by DHL / UPS / FedEx / TNT / EMS / SF we support.
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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
  • QC (Quality Warranty)
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  • Certifications & Memberships

QC (Quality Warranty)

Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


Strict quality inspection builds a solid foundation for electronic component quality.
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We eliminate defective components and ensure the stable operation of electronic devices through professional quality standards.
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Packaging

Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Certifications & Memberships

Third-party certified, strict quality control. Our certification
  • ISO 9001: 2015
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FOBLOQF-4T2 Image

FOBLOQF-4T2

RF Solutions
98D-FOBLOQF-4T2

Want a better price? Add to Cart and Submit RFQ now, we'll contact you immediately.

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