T5577 is a contactless read/write identification IC for applications in the 125Khz or 134Khz frequency band. The one chip 363bit EEPROM can be read and written block-wise from a base station (reader). It is fully compatible with T5567, T5557. Replacement for E5551/T5551 in most common operation modes. It is conformed with ISO11784/ 785. T5577 is widely used for hotel lock system, vendor system, loyalty payment system etc.

GYRFID also provides rectangle antenna T5577 ISO cards, as well as T5577 tags.