Preprinted CR80 125KHz TK4100 RFID Cards Pack of 100
- Product Code: RCC21
- Availability: In Stock
-
$35.00
- 5 or more $15.51
- 10 or more $12.18
- 50 or more $10.29
- 100 or more $9.13
The TK4100 is a low-frequency (LF) 125 kHz read-only RFID chip, widely used as a low-cost alternative to the EM4100/EM4200 family. It is primarily designed for simple identification tasks in access control and asset tracking.
1. Core Definition
The TK4100 is a CMOS integrated circuit for passive RFID transponders. It is a factory-laser-programmed, read-only device, meaning its 64-bit unique ID (UID) is permanently burned into the chip during manufacturing and cannot be alteredin the field. It is fully protocol-compatible with EM4100/EM4200 chips.
2. Key Technical Specifications
Parameter | Specification |
Chip | TK4100 (Commonly Taiwan/China based) |
Frequency | 125 kHz (Range: 100–150 kHz) |
Memory | 64-bit Laser ROM (Read-Only) |
UID Length | 40 bits (within the 64-bit frame) |
Modulation | Manchester (typical), Biphase, PSK |
On-chip Features | Full-wave rectifier, voltage limiter, ~480 pF resonant capacitor |
Read Distance | Typically 2–10 cm (depends on reader antenna) |
Power Source | Passive (Powered by reader's RF field) |
Operating Temp. | -40°C to +85°C |
The chip requires only an external antenna coil to function, as all necessary tuning and power management components are integrated.
3. Data Format
The 64-bit data frame follows the standard EM format:
- 9 Header Bits(all '1's)
- 40 Data Bits(8-bit manufacturer code + 32-bit unique serial number)
- 14 Parity Bits(Error checking)
- 1 Stop Bit(0)
This structure ensures direct compatibility with existing EM4100 readers.
4. Common Applications
- Access Control & Attendance: Office doors, gate entry (CR80 cards, key fobs).
- Asset Tagging: Industrial process control, logistics tracking.
- Animal Identification: Low-cost livestock tags.
- Simple ID Systems: Where a unique, unchangeable number is sufficient.
5. Comparison with T5577 & EM4200
Chip | Type | Key Feature |
TK4100 | Read-Only | Cheap EM4100 clone, fixed ID, good for bulk access control. |
EM4200 | Read-Only | Original EM family, higher-end, supports more encoding options. |
T5577 | Read/Write | Configurable, can emulate TK4100/EM4100, used for reusable systems. |
In summary, the TK4100 is a cost-effective, disposable RFID solution for applications that require a simple, permanent ID number without the need for data rewriting.