Tuesday, August 22, 2017

ACC5557 RFID Card Reader


This reader is for Temic T5557 Read/Write RF Identification Ics. The T5557 is a contactless Read/Write IDentification IC (IDIC) for applications in the 125KHz frequency range. A single coil connected to the chip serves as the IC’s power supply and bi-directional communication interface. The antenna and chip together form a transponder or tag. The on-chip 330-bit EEPROM (10 blocks,33 bits each) can be read and written block-wise from a reader. Block 0 is reserved for setting the operation modes of the T5557 tag. Block 7 may contain a password to prevent unauthorized writing. Data is transmitted from the IDIC using load modulation. This is achieved by damping the RF field with a resistive load between the two terminals Coil 1 and Coil 2. The IC receives and decodes 100% amplitude modulated (OOK) pulse interval encoded bit streams from the reader.


The ACC-5557 Read/Write RF Identification system may be used in banks, tax, stock, postal etc. Due to different applications, it will code the internal information of a card into the digital information which is then received by a host.


Operating frequency: 100- 150KHz– Read distance: up tp 10CM
– Size is 155mm×100mm×25mm

– LED indicater and buzzer for read success.or failure

– Power supplied from USB with the direct cable

– No external power needed

– Power voltage: DC 5V+- 5%

– Power current: <-65mA

– Operation temp.: -10 ` 55 C degree 5~90 RH

– Small size, configurable for ISO11784/ 785 compatibility

– Interface: RS232

– Warranty Period 1 Year