NXP MIFARE Classic EV1 1K Card 4-Byte UID for sale

Buy NXP MIFARE Classic EV1 1K Card 4-Byte UID – 4 Byte UID/NUID, RFID, NFC, access control, 13.56 MHz, 1KB memory, ISO/IEC 14443A, and smart cards

NXP MIFARE Classic EV1 1K Card 4-Byte UID is a 13.56 MHz contactless RFID smart card designed for applications such as access control, identification, membership systems, transportation, loyalty programs, and other contactless card applications. The 1K memory version provides 1 KB of EEPROM storage and uses the MIFARE Classic architecture for secure data storage and authentication.

The 4-byte identifier is commonly referred to as a 4-byte UID in the market. For the NXP MIFARE Classic 1K 4-byte variant, NXP technically describes this identifier as a 4-byte NUID (Non-Unique Identifier). The NUID is stored in the manufacturer block of Sector 0 and is used during the card activation and authentication process.

MIFARE Classic 1K 4 Byte UID Features

• 13.56 MHz contactless RFID technology
• MIFARE Classic 1K memory architecture
• 1 KB EEPROM memory
• 4-byte UID / NUID variant
• ISO/IEC 14443 Type A compatible
• Contactless operation
• 16 sectors
• 4 blocks per sector
• 16 bytes per block
• Two authentication keys per sector
• Suitable for RFID and NFC-enabled systems
• Available for access control and identification applications
• Compatible with many existing MIFARE Classic infrastructures

MIFARE Classic cards use a sector-based memory structure. Each sector contains data blocks and a sector trailer containing access conditions and authentication keys.

What Is a NXP MIFARE Classic EV1 1K Card 4-Byte UID?

A NXP MIFARE Classic EV1 1K Card 4-Byte UID card is a MIFARE Classic 1K contactless card equipped with a 4-byte identifier used by the reader during card identification and anti-collision procedures.

For the NXP MF1S50yyX 4-byte variant, the 4-byte NUID is stored in Block 0 of Sector 0. The card uses ISO/IEC 14443-3 Type A procedures for anti-collision and card selection.

Because “NXP MIFARE Classic EV1 1K Card 4-Byte UID” is widely used as a product-search term, it can be used alongside the technically precise term MIFARE Classic 1K 4 Byte NUID.

MIFARE Classic 1K Memory Structure

The MIFARE Classic 1K provides 1 KB EEPROM memory divided into 16 sectors. Each sector contains four 16-byte blocks.

Sector 0 contains the manufacturer block, which includes the card identifier and manufacturer information. The remaining sectors can be configured for application data according to the relevant access conditions and authentication keys.

This structure makes MIFARE Classic 1K cards suitable for applications requiring distributed data storage and sector-level access control.

NXP MIFARE Classic EV1 1K Card 4-Byte UID vs 7 Byte UID

MIFARE Classic 1K is available in variants using different identifier configurations. NXP documentation describes both 4-byte and 7-byte UID-related activation options for MIFARE Classic 1K devices.

When selecting a card, it is therefore important to specify whether your existing reader, access-control system, RFID system, or software requires a 4-byte UID/NUID or a 7-byte identifier.

For legacy systems specifically designed around 4-byte identifiers, the MIFARE Classic 1K 4 Byte UID/NUID version can provide the appropriate card format.

Applications of NXP MIFARE Classic EV1 1K Card 4-Byte UID

NXP MIFARE Classic EV1 1K Card 4-Byte UID can be used in a variety of contactless identification and RFID applications, including:

• Access control systems
• Employee identification
• Membership cards
• Student ID cards
• Hotel and hospitality applications
• Loyalty programs
• Event identification
• Time and attendance systems
• Public transportation applications
• RFID identification systems
• Contactless authentication systems
• Visitor management
• Campus access systems

The exact suitability depends on the reader, card configuration, authentication requirements, and existing system infrastructure.

MIFARE Classic 1K RFID Card

The MIFARE Classic 1K RFID Card operates at 13.56 MHz and uses contactless communication based on ISO/IEC 14443 Type A. MIFARE Classic 1K is widely used in established RFID infrastructures because of its established memory organization, authentication mechanism, and broad reader ecosystem.

MIFARE Classic 1K NFC Card

A MIFARE Classic 1K card can also be used in NFC-capable environments where the reader or device supports the relevant MIFARE Classic communication technology. However, compatibility should always be verified with the specific NFC reader, smartphone, or access-control hardware.

MIFARE Classic uses its native MIFARE protocol based on ISO/IEC 14443-3 rather than being equivalent to every NFC Forum tag technology.

Buy NXP MIFARE Classic EV1 1K Card 4-Byte UID

Looking to buy NXP MIFARE Classic EV1 1K Card 4-Byte UID for an RFID, access control, identification, or contactless card project? Choose the correct MIFARE Classic 1K variant based on your reader and system requirements.

Before ordering, confirm:

• 4-byte UID/NUID requirement
• 13.56 MHz operating frequency
• MIFARE Classic 1K compatibility
• ISO/IEC 14443 Type A reader compatibility
• Required card material and dimensions
• Printing or personalization requirements
• Required quantity
• Existing reader and software compatibility

For volume requirements, MIFARE Classic 1K cards can be supplied as blank cards or customized according to the application and card personalization requirements.

Applications

• Public transportation
• Access management
• Electronic toll collection
• Car parking
• School and campus cards
• Employee cards
• Internet cafés
• Loyalty

Frequently Asked Questions

How much memory does MIFARE Classic 1K have?

MIFARE Classic 1K provides 1 KB of EEPROM memory, organized into 16 sectors.

Is MIFARE Classic 1K 4 Byte UID an RFID card?

Yes. MIFARE Classic 1K is a 13.56 MHz contactless RFID technology and operates using ISO/IEC 14443 Type A communication.

Is a 4-byte UID the same as a 4-byte NUID?

In product searches and commercial descriptions, the terms are often used interchangeably. Technically, NXP describes the 4-byte identifier of its relevant MIFARE Classic 1K variant as a 4-byte NUID (Non-Unique Identifier).

What are MIFARE Classic 1K cards used for?

They are commonly used for access control, identification, membership, transportation, loyalty, attendance, hotel, and other contactless RFID applications.

Should I specify 4-byte UID when ordering MIFARE Classic 1K cards?

Yes. If your existing RFID reader or application specifically requires a 4-byte identifier, specify MIFARE Classic 1K 4 Byte UID / 4 Byte NUID when requesting the card to reduce compatibility issues.