125 kHz proximity 125 kHz

Microchip Technology (Atmel T5577) Compatible Cards & Fobs

The T5577 (ATA5577C), originally designed by Atmel and now produced by Microchip Technology, is a 256-bit rewritable 125 kHz transponder IC that can emulate virtually any unencrypted LF proximity format including EM4100, HID H10301, Indala, AWID, Kantech ioProx, DoorKing DKProx, SecuraKey, and many others. American Key Cards supplies T5577 blanks in clamshell, ISO PVC, and key-fob form factors — as unprogrammed blanks or pre-programmed to your specified format and facility code range.

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Microchip Technology (Atmel T5577) formats we make compatible cards for

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Microchip Technology (formerly Atmel)

T5577 Writable / Programmable Transponder

The T5577 (ATA5577C) is a 256-bit rewritable 125 kHz transponder IC that can be programmed to emulate virtually any unencrypted LF proximity format, making it the universal clone target and spare-card solution for legacy 125 kHz access control systems.

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