ICODE SLIX2 vs. Ultralight EV1 (48 Byte)

These two chips, the ICODE SLIX2 and the Ultralight EV1 (48 Byte) are from different NFC chip families. The ICODE SLIX2, manufactured by NXP belonging to the ICODE family, and the Ultralight EV1 (48 Byte), also manufactured by NXP.

The ICODE SLIX is part of NXP's ICODE family of chips. The ICODE series is older than NXP's NTAG series and has a number of significant differences - particularly a longer 8 byte UID and a longer memory retention specification of 50 years. However, this ICODE SLIX2 variant is newer and contains a large numebr of feature enhancements.

Generally, these chips are not commonly used in mobile phone NFC applications. While they are similar in cost to the NTAG series, Seritag generally recommend NTAG unless the additional specified memory retention lifespan is specifically required. The ICODE chips are not available in as many formats as the NTAG chips and are typically made to order.

The NXP MIFARE Ultralight® EV1 is a updated version of the very popular Ultralight chip from NXP. The original Ultralight chip dates back to 2001 and the product has been used for ticketing the world over. It’s a very simple, reliable and cost effective product. Unfortunately, there’s probably almost as many non-genuine MIFARE Ultralight chips as genuine ones. The EV1 update added an originality check feature to help counteract this.

There are two variants of the Ultralight EV1 with two memory capacities. The smaller chip has 48 bytes of usable memory (similar to the NTAG210 and NTAG210micro) and the larger has 128 bytes (similar to the NTAG212).

Both these chips have a strong ScanStrength and will work very well with mobile phones.

Key Features

Key Specifications

Phone compatibility

Typical Use Cases

User Features

	ICODE SLIX2	Ultralight EV1 (48 Byte)
Total memory (bytes)	316	80
User memory (bytes)	320	48
Max URL (chars)	250	40
UID (bytes)	8	7
ECC signature
32-bit password
UID ASCII mirror	-	-
Scan Counter		-
Counter ASCII mirror	-	-
Lockable

Technical Specifications

	ICODE SLIX2	Ultralight EV1 (48 Byte)
Chip thickness	120 μm	75 µm / 120 µm
NFC Forum	Type 5	Type 2
Operating Freq.	13.56Mhz	13.56Mhz
Data Trans. Rate	53 kbit/s	106 kbit/s
Input Capacitance	23.5 pf	17pF / 50pF
Fast read
Data retention (years)	50	10
Write endurance (cycles)	100000	100000
Anticollision	-	-
Standard	ISO/IEC 15693	ISO/IEC 14443 A
Release date	2016	2013

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