T5577 Keyfob

A T5577 Keyfob is a small and portable RFID transponder designed for secure identification and access control applications. It is based on the Atmel ATA5577 (T5577) chip, a re-writable 125KHz RFID chip that offers high compatibility and flexible data configuration.

The keyfob can be made from a variety of durable materials such as ABS, PVC, or PC, providing excellent resistance to water, impact, and temperature. With its stable performance and long reading distance, it is an ideal solution for environments that require reliable contactless identification.

We support OEM & ODM manufacturing, including customized shape, color, logo printing, laser numbering, and encoding services.

The T5577 RFID keyfob is widely used in access control, time attendance systems, parking management, membership management, loyalty programs, logistics, laundry services, swimming pools, and other 125KHz RFID applications.

Product Description

• Item name:T5577 Keyfob
• Widely used on Access Control Areas, Identification, Door Keys, Attendance, Parking Lots etc.
• Chip available:TK4100,EM4200,T5577,Hitag 1,Hitag 2,Hitag S FM11RF08,Classic S50,Classic S70,Ultralight,NTAG213,I-CODE2,T12048,SR1512,UCODE GEN2,ALIEN H3,IM PINJM4 etc.
• Frequency:LF(125KHz), HF(13.56MHz), UHF(860~960MHz)
• Material: PC
• Certificate: ISO 9001-2000, SGS
• Color: blue,red,white,black,green,yellow,orange,gray,pink or customized
• Printing: Silk-screen printing with logo/ Ink-jet printing or Thermal transfer printing or Laser process of Serial Number / Chip encoding / Laser Logo.
• Working Temperature: -30 º - 75 ºC
• Writing Cycle: 100,000 times
• Production: 10000pcs/week
• Packing: 100pcs/bag, 10bags/ctn
• Warranty: 1Year
• OEM,ODM service supplied(from moulding to production)

Key Advantages

High Compatibility:
Compatible with most 125KHz RFID readers and access control systems. The T5577 chip supports multiple data formats and can be easily configured to replace EM4100/EM4200 cards.

Rewritable Chip:
The T5577 chip is fully reprogrammable, allowing data to be rewritten multiple times for flexible and reusable applications.

Durable Materials:
Made of ABS, PVC, or PC, the keyfob is waterproof, dustproof, and resistant to impact and high temperatures, suitable for both indoor and outdoor environments.

Stable Performance:
Fast response time and strong reading signal ensure reliable operation even under harsh conditions.

Long Lifespan:
Each keyfob can withstand over 100,000 read/write cycles and retains data for more than 10 years, ensuring long-term stability.

Wide Applications:
Ideal for access control, attendance management, membership programs, parking systems, loyalty schemes, and other low-frequency RFID applications.

Customization Services

We offer complete OEM & ODM customization to meet different project or branding needs.

Available Customization Options:

Chip Type: T5577 or other 125KHz compatible chips (e.g. EM4100, EM4305)

Material & Color: ABS / PC / PVC, available in standard or Pantone colors

Logo Printing: Silk printing, laser engraving, UV printing, or epoxy dome logo

Serial Numbering: Laser or inkjet printed unique ID or QR code

Encoding Service: Pre-programmed or blank for user encoding

Shape & Size: Standard or customized mold designs

Packaging: Individual polybag, bulk packing, or customized gift box

Customization Process:

• Confirm requirements (chip type, design, color, logo, packaging, etc.)

• Design & sample approval (3–5 working days for samples)

• Mass production (standard lead time 7–15 days)

• Quality inspection & delivery (support third-party testing)

Core Applications

Access System Upgrade

Cloning legacy access cards to replace lost keys, enabling seamless integration with old HID/EM systems without hardware changes.

Swimming Pool Lockers

Waterproof locker keyfobs for swim centers, allowing daily code reset to prevent unauthorized access after rental periods.

     

Temporary Access Control

Re-writable entry passes for construction sites with expiry dates, automatically deactivating after project completion.

Event Check-In

Event credentials reprogrammed for different zones, enabling dynamic access control for multi-session conferences.