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100/150 kHz OTP
ATA5575M1 RFID One Time Programmable (OTP) IDIC® with Mega Pads for Contactless Identification, Unique TAG ID Pre-programmed, Improved Reading Performance, Economic Writing Performance, High Temperature Data Retention, up to 330 pF Trimmed Capacitor On-chip. For Access Control Applications Using the 64-bit Unique Format. 128-bit User Data in Total for Advanced Applications. Gold Bumps on the Mega Pads as Option.

100/150 kHz Read/Write
ATA5558 RFID Read/Write IDIC® for Contactless Identification, 1-Kbit Read/Write IC with Integrated Anticollision Functionality, ASK Modulation
ATA5570 RFID Read/Write IDIC® for Contactless Identification, Multifunctional 330-bit Read/Write, External Resistor-sensor Input, Threshold Detection
ATA5577M1 RFID Read/Write IDIC® for Contactless Identification, Backward Compatible to 5551, 5557 and 5567 in Most Common Modes. 64-bit Unique TAG ID, Improved Operating Performance, High Temperature Data Retention, up to 330 pF Trimmed Capacitor On-chip. ISO 11784 and ISO 11785 Compatible
ATA5577M2 RFID Read/Write IDIC® with Gold-bumped Mega Pads for Contactless Identification, Backward Compatible to 5551, 5557 and 5567 in Most Common Modes. 64-bit Unique TAG ID, Improved Operating Performance, High Temperature Data Retention, up to 330 pF Trimmed Capacitor On-chip. ISO 11784 and ISO 11785 Compatible
e5561 RFID Read/Write IDIC® for Highly Sophisticated Security Demands "Copy Protection", 256-bit R/W Memory, Up to 128-bit Secret Key for Authentication Password Protection, Different Codings and Bit-rates

125/134 kHz Reader ICs
U2270B Read/Write Base Station IC, 100 to 150 kHz Carrier Frequency, Amplitude Modulation Typically Up to 5K Baud, Manchester/Biphase RF/32, RF/64, RF/128

125/134 kHz Transponder
TK5551 Read/Write Transponder, Option Configurable, 125 kHz, AOR Feature for Multi-tag Access
TK5561A Read/Write Transponder for Highly Sophisticated Security Applications, 125 kHz Carrier Frequency, Encryption Algorithm, 9 x 32-bit EEPROM, Low-power/Low-voltage CMOS, No Battery Supply, Small Size, Manchester/Biphase, RF/32, RF/64