What are low-frequency chips, ID cards, and low-frequency cards

What is a low-frequency chip

Low frequency has identity recognition function, generally used for unlocking access control, ordinary members, employee work Cards, etc., but does not have recharge function.

Low frequency protocol

The low-frequency protocols are divided into ISO 11784 and ISO 11785, which respectively specify the code structure and technical guidelines for animal identification. The standards do not specify the style and size of responders, so they can be designed in various forms suitable for the animals involved, such as glass tubes, ear tags, or collars.

Low frequency operating frequency

The operating frequency range in the low frequency range is 30kHz to 300kHz. Typical operating frequencies are: 125KHz, 133KHz, 134.2kHz. The communication distance of low-frequency tags is generally less than 1 meter.

The technical standards specify the data transmission methods and reader specifications for low-frequency RFID. The working frequency is 134.2KHz, and there are two types of data transmission methods: full duplex and half duplex. The reader data is represented by differential biphasic codes. Due to the limitations of longer charging time and operating frequency of the responder, the communication rate is relatively low.