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HomeProductsRF/IF and RFIDRF Receiver, Transmitter, and Transceiver Finished UnitsFOBLOQF-4T4
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FOBLOQF-4T4 - RF Solutions

Manufacturer Part Number
FOBLOQF-4T4
Manufacturer
RF Solutions
Allelco Part Number
98D-FOBLOQF-4T4
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
33,487 pcs available, New & Original
Parts Description
KEYFOB TRANSMITTER FM 4CH
Package
Bag
Data sheet
FOBLOQF-4T4.pdf
RoHs Status
ROHS3 Compliant
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Our certification
In stock: 33487
  • Unit Price: $18.59
  • Subtotal: $0.00

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Quantity Unit Price Ext. Price
1+ $18.59 $18.59
The above prices does not include taxes and freight rates, which will be calculated on the order pages.

Specifications

FOBLOQF-4T4 Tech Specifications
RF Solutions - FOBLOQF-4T4 technical specifications, attributes, parameters and parts with similar specifications to RF Solutions - FOBLOQF-4T4

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)

How does the FOBLOQF-4T4 ensure secure communication in a 433.92MHz remote control system, and what role does KEELOQ play in preventing replay attacks?
The FOBLOQF-4T4 leverages the KEELOQ hopping code algorithm, which generates a unique 32-bit code for each transmission. This prevents code grabbers from capturing and reusing signals, as each button press produces a different code sequence. With over 4 billion possible code combinations and a synchronization window that advances only upon valid reception, the system effectively mitigates replay attacks without requiring bidirectional communication.
What is the expected real-world operating range of the FOBLOQF-4T4 under typical suburban conditions, and how does environmental interference affect performance?
While the FOBLOQF-4T4 specifies a 150m range in ideal line-of-sight conditions, actual performance in suburban environments typically ranges from 30m to 80m due to building materials, foliage, and 433.92MHz band congestion from other ISM devices. Metal structures and Wi-Fi routers operating in adjacent bands can further attenuate signal strength, making site testing essential for reliable deployment.
Can the FOBLOQF-4T4 operate reliably with a 3.0V lithium coin cell, and what is the impact of supply voltage variation on transmission consistency?
Yes, the FOBLOQF-4T4 functions across its full 2.3V to 3.3V supply range, making it compatible with standard CR2032 cells. However, as voltage drops toward 2.3V—typically near end-of-life—output power and modulation depth decrease slightly, which may reduce effective range by up to 20%. Designers should account for this degradation when specifying battery life expectations.
How does the FOBLOQF-4T4 compare to generic 433MHz ASK/OOK transmitters in terms of interference resilience and coexistence in dense RF environments?
Unlike basic ASK/OOK transmitters that transmit static codes, the FOBLOQF-4T4 uses KEELOQ’s frequency-hopping-like code diversity and Manchester encoding, which improves noise immunity and reduces collision probability. In environments with multiple transmitters, this protocol-level distinction significantly lowers the chance of false triggers compared to non-coded alternatives.
What design considerations are necessary when integrating the FOBLOQF-4T4 into a receiver system that must comply with FCC Part 15 regulations?
The FOBLOQF-4T4 operates in the 433.92MHz ISM band under FCC Part 15.231, which governs periodic control signals. Designers must ensure the receiver does not acknowledge transmissions more frequently than once per second and that the system includes a mechanism to prevent continuous transmission—such as a timeout circuit—to avoid violating duty cycle limits.
How does the FOBLOQF-4T4 handle button debounce and transmission timing, and what is the minimum interval between successive presses?
The FOBLOQF-4T4 incorporates internal debouncing and transmits each code sequence for approximately 200ms. Due to the KEELOQ synchronization protocol, the system requires a minimum interval of 1.2 seconds between valid activations to ensure the receiver can resynchronize. Rapid successive presses may result in missed commands unless buffered at the receiver end.
Is the FOBLOQF-4T4 suitable for outdoor access control systems exposed to temperature extremes, and what are its environmental limitations?
The FOBLOQF-4T4 is rated for standard commercial temperature ranges (0°C to 70°C), which may limit use in unheated outdoor enclosures during winter. In cold environments below 0°C, battery voltage sag and reduced RF output can degrade performance. For year-round outdoor use, consider housing the receiver in a climate-controlled enclosure or selecting an industrial-grade variant if available.
How does the FOBLOQF-4T4 differ from rolling code systems using AES encryption, and in what applications is KEELOQ sufficient?
The FOBLOQF-4T4 uses KEELOQ, a proprietary hopping code algorithm with 64-bit encryption, which is computationally lightweight and sufficient for low-risk applications like garage doors or lighting control. Unlike AES-based systems, KEELOQ does not offer cryptographic-grade security but provides strong resistance to casual interception. For high-security applications such as vehicle immobilizers, AES is preferred, but for general-purpose remote control, KEELOQ offers a cost-effective balance of security and reliability.
What antenna configuration is recommended for maximizing range when using the FOBLOQF-4T4 in a compact enclosure?
A quarter-wave monopole antenna (approximately 17.3cm for 433.92MHz) provides optimal radiation efficiency. In space-constrained designs, a helical or PCB trace antenna can be used, but expect a 30–50% reduction in range. Ensure the antenna is placed away from ground planes and metal components, and maintain a 50Ω impedance match to minimize return loss.
Can multiple FOBLOQF-4T4 units be used simultaneously in the same area without cross-triggering, and how is addressing handled?
Each FOBLOQF-4T4 is factory-programmed with a unique 28-bit manufacturer ID and 12-bit serial number, allowing up to 4,096 distinct units to coexist. Receivers must be paired to accept only specific IDs, preventing cross-triggering. However, in high-density deployments, overlapping code windows may still cause rare false accepts—implementing a challenge-response handshake at the application layer can further reduce this risk.

Parts with Similar Specifications

The three parts on the right have similar specifications to RF Solutions FOBLOQF-4T4

Product Attribute FOBLOQF-4T3 FOBLOQA-4T4 FOBLOQF-4T1 FOBLOQF-4S4
Part Number FOBLOQF-4T3 FOBLOQA-4T4 FOBLOQF-4T1 FOBLOQF-4S4
Manufacturer RF Solutions RF Solutions RF Solutions RF Solutions
Voltage - Supply - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Applications - - - -
Function - - - -
Features - - - Simultaneous Sampling
Power - Output - - - -
Data Rate (Max) - - - -
Frequency - - - -
Base Product Number - DAC34H84 MAX500 ADS62P42
Modulation or Protocol - - - -
Series - - - -
Interface - - - -
Sensitivity - - - -

FOBLOQF-4T4 Datasheet PDF

Download FOBLOQF-4T4 pdf datasheets and RF Solutions documentation for FOBLOQF-4T4 - RF Solutions.

Datasheets
FOBLOQF Remote Control.pdf

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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

  1. Use your express account for shipment if you have one.
  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.
  2. Others more shipping ways, please get in touch with your customer manager.

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.
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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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Payment Support

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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-4T4 Image

FOBLOQF-4T4

RF Solutions
98D-FOBLOQF-4T4

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

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