Side-by-Side Comparison
Smart Cards & RFID
EM4100 & T5577 vs. HID Prox & iCLASS
Comparing 2 standards across 11 specifications. 11 key differences identified.
Comparing:
EM4100 & T5577
HID Prox & iCLASS
EM4100 and T5577 represent the foundational low-frequency (LF, 125 kHz) RFID transponder ecosystem. The EM4100 (EM-Marin) is a factory-programmed, 64-bit read-only identity chip, while the Atmel/Microchip T5577 is a rewritable EEPROM transponder used to emulate and clone various 125 kHz LF protocols.
HID Prox and iCLASS are proprietary physical access control credentials developed by HID Global. They encompass legacy 125 kHz unencrypted Prox (such as 26-bit Wiegand H10301), 13.56 MHz read/write iCLASS smart cards, and modern Seos microprocessor cards utilizing AES-128 encryption.
Specification Comparison Table
11 Parameters| Parameter / Spec | ||
|---|---|---|
|
Frequency Bands
|
100 to 150 kHz (125 kHz nominal) | — |
|
EM4100 Memory Structure
|
64 bits (9 header bits, 40 customer/ID bits, 15 parity/stop bits) | — |
|
T5577 Memory Capacity
|
330 bits (10 blocks of 33 bits EEPROM) | — |
|
Modulation Schemes Supported
|
Manchester, Biphase, FSK, PSK | — |
|
Data Rates (Typical)
|
RF/64, RF/32, RF/16 clock divisors | — |
|
Cryptographic Protection
|
None (Plaintext transmission) | — |
|
Operating Frequencies
|
— | 125 kHz (Prox) / 13.56 MHz (iCLASS / Seos) |
|
Common Bit Formats
|
— | 26-bit H10301, 37-bit H10302/H10304, Corporate 1000 |
|
Standard Compliance (iCLASS)
|
— | ISO/IEC 15693 and ISO/IEC 14443-A/B |
|
Security Cryptography
|
— | None (Prox), 64-bit DES (Legacy iCLASS), AES-128 (iCLASS SE / Seos) |
|
Reader Interface Protocol
|
— | Wiegand / OSDP (Open Supervised Device Protocol) |