T5577 RFID Tag Key Fob for Access Control Systems
What Is a T5577 RFID Tag Key Fob?
A T5577 RFID tag key fob is a low-frequency RFID credential that operates at 125 kHz and stores identification data on a programmable EEPROM chip. Unlike fixed-code RFID credentials, the T5577 chip can be encoded and reconfigured using compatible RFID programming equipment.
Its combination of rewritable memory and support for multiple LF RFID formats makes it a widely used credential for systems that require configurable user identification.
Key Features for RFID Tag Key Fob
- Rewritable EEPROM memory
- Supports ASK, FSK, and PSK modulation
- Compact key fob format for everyday carrying
- ABS plastic housing
- Available in multiple colors
- Supports UID programming and serialization
- Suitable for custom branding and OEM projects
RFID Tag Key Fob Technical Specifications
| Parameter | Specification |
| Product Type | RFID Tag Key Fob |
| Chip | T5577 |
| Frequency | 125 kHz |
| Memory | 330-bit EEPROM |
| Read/Write Capability | Rewritable |
| Modulation | ASK, FSK, PSK |
| Protocol Compatibility | ISO 11784 / ISO 11785 Compatible |
| Reading Distance | 2–10 cm (Reader Dependent) |
| Material | ABS Plastic |
| Operating Temperature | -25°C to +70°C |
| Data Retention | Up to 10 Years |
| Available Colors | Blue, Black, Red, Yellow, Custom |
| Printing Options | Silk Screen, UV Printing, Laser Marking |
| Encoding Services | UID Programming Available |
| Numbering Options | Serial Number, Laser ID |
| Packaging | Standard or Custom Packaging |
| OEM / ODM Support | Available |
How Does a T5577 RFID Key Fob Work?
A T5577 RFID key fob contains a low-frequency RFID chip connected to an embedded antenna. When positioned within the electromagnetic field of a compatible RFID reader, the chip receives power and transmits stored identification data back to the reader.
Because the chip uses EEPROM memory, stored data can be modified using compatible RFID writers. This allows administrators and system integrators to configure credentials according to system requirements.
T5577 vs EM4100 RFID Key Tags
T5577 and EM4100 are both used in 125 kHz RFID systems, but they differ in data management capabilities.
| Feature | T5577 | EM4100 |
| Frequency | 125 kHz | 125 kHz |
| Rewritable | Yes | No |
| Memory Type | EEPROM | Factory Programmed |
| User Configuration | Supported | Not Supported |
| Data Modification After Issuance | Yes | No |
| For applications that require credential updates or replacement, T5577 provides greater flexibility than fixed-code RFID tags. | ||
Applications
T5577 RFID key fobs are commonly used for:
- Access control systems
- Employee attendance tracking
- Residential community access
- Parking management
- Membership identification
- Visitor management
Real-World Deployment
A commercial office building using a legacy 125 kHz access control system required replacement credentials for employees after a large-scale staff onboarding project. T5577 RFID key fobs were selected because new user data could be encoded onto the credentials while maintaining compatibility with the existing reader infrastructure. This allowed the facility to expand its credential inventory without replacing installed hardware.
Frequently Asked Questions (FAQ)
What is a T5577 RFID key fob?
A T5577 RFID key fob is a rewritable 125 kHz RFID credential used for user identification and access management.
Can T5577 emulate EM4100?
Yes. T5577 chips can be configured to emulate several low-frequency RFID formats, including EM4100.
What frequency does T5577 use?
T5577 operates at 125 kHz, which is part of the low-frequency RFID spectrum.
What memory type does the T5577 chip use?
The chip uses EEPROM memory, allowing data to be rewritten multiple times.
What is the typical read range?
Reading distance typically ranges from 2 to 10 cm depending on the reader, antenna design, and installation environment.
Can the key fob be customized?
Yes. Custom colors, logo printing, UID encoding, serial numbering, and packaging options are available.
Request a Quote or Sample
Need customized T5577 RFID key fobs for your access control project?
Contact our team to discuss chip encoding, branding requirements, sample availability, and volume pricing for OEM or bulk orders.
Hot To Customize RFID Tags
Know the customization process for RFID tags
Size & Shape
Send your requirements on size and shapes. Tags are typically designed in simple shapes and sizes to match the internal antenna. However, they can also be customized in various sizes and shapes to best fit the intended application and the asset being tagged. For instance, RFID hang tags can be customized in size, shape, and attachment method to perfectly suit specific applications.
Layout & Chips
In the label format designer, select the layout that matches the type and size of the RFID label you wish to create. Our factory provides a variety of label templates, including RFID-specific options. We also offer a range of RFID chips tailored to meet your specific requirements.
High Customization
Custom tags are designed from the ground up to meet the needs of specific applications, with unique variables for nearly every option listed below. A semi-custom tag typically starts as a standard tag but offers additional customization options, such as custom printing, encoding, or specific backings and attachment methods.
Sample Confirmation
Before proceeding with full-scale production, we offer a sample confirmation process to ensure that the RFID tags meet your exact specifications and application requirements.
Mass Production
Our mass production process for RFID tags is designed to deliver high-quality, reliable products at scale, ensuring that your business has a steady and consistent supply of RFID solutions tailored to your needs. Leveraging state-of-the-art manufacturing facilities and advanced technology, we maintain efficiency and precision throughout the production cycle.
RFID Tags Application
Use customized RFID tags in different industries.
RFID Vehicle Tags
Vehicles with RFID tags enable secure access to gated areas. RFID tags also streamline truck weighing for efficient billing.
Temperature Sensor Tags
RFID temperature sensors, used in industries like steel, send data to alert users of unsafe conditions via RFID readers.
RFID Supply Chain Tags
RFID tags for supply chain visibility track products, showing when a box, pallet, or container moves from one facility to another.
RFID Personnel Tracking
RFID strengthens access security: employee badges for workspace entry, hotel wristbands for pool access.
RFID Pallet Tracking Tags
Our RFID tags are ideal for tracking pallets and containers, offering durable, low-profile solutions for warehouse management.
Custom RFID Tags & Labels
Our factory supplies custom RFID tags and OEM hardware solutions for unique needs when standard RFID products aren't available.
RFID Laundry Tags
Our RFID laundry tags, with a soft rubber casing, are flexible and durable, surviving 200 wash cycles and 60 bars of pressure.
Industrial RFID Tags
We provide rugged industrial RFID tags and readers for demanding applications. Our tags withstand all weather conditions.
Animal RFID Tags
RFID tags track animals and pets using ear tags or injectable ampoules. Ear tags can be custom-printed and come in various colors.
RFID Asset Tracking
RFID tags for asset tracking, like file servers, rental equipment, streamline inventory, asset management, enabling quick location, tracking.
Consumables RFID Tags
RFID counterfeit tags on consumables, with a reader in the machine, verify authenticity and prevent counterfeit use.
Manufacturing RFID Systems
RFID tags are used on almost all products—apparel, furniture, appliances, and cars—and are crucial for automated manufacturing systems.
Why Choose Us
As an original manufacturer with over 13 years of experience, we specialize in designing and manufacturing passive RFID (NFC, HF, and UHF) tags for applications in inventory, laundry, access control, identification, and industrial automation management.
We are a pioneering leader in RFID technology and smart product solutions. For nearly 20 years, we have been at the forefront of custom RFID and NFC technology, offering innovative solutions in every imaginable form. Our expertise lies in developing and producing RFID/NFC products that are tailored to meet your specific requirements.
As the world’s leading RFID supplier, our factory is passionate about RFID technology. We deliver a wide range of products, including NFC tags, NFC cards, RFID/NFC labels, RFID inlays, various apparel tags, laundry tags, and RFID devices, to clients around the globe. Our RFID products are widely used in marketing campaigns, healthcare monitoring, workforce management, stock control, access control, apparel systems, laundry systems, inventory systems, IoT systems, and security applications.
Our Benefits
We provide products with competitive pricing and reliable quality, backed by an after-sales warranty. Whether you are a distributor, system integrator, or end-user, you will find the right RFID and related products here, ensuring that your company gains tangible benefits.
We have grown into a company with over 200 team members, including a production department, R&D center, sales department, technical support, and after-sales service. Understanding that time is of the essence, we can fulfill customized orders within just 5 days. Our dedicated team of over 100 factory staff ensures a stable supply and fast delivery for all our orders.
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