Important information regarding 4 Byte & 7 Byte UIDs of MIFARE products

NXP Semiconductors would like to raise your attention concerning the consumption of unique identifier numbers (UIDs) with length of 4 Byte (B) for its MIFARE Classic^TM smart card ICs and emulations.
With the accumulated and estimated global demand of MIFARE Classic ICs from NXP and its licensees we expect that the market will run out of 4 Byte unique IDs. Successor products are being offered with 7 Byte UID as the recommended option and products with 4 Byte identifiers.

For more details please read the customer letters:
English version, Chinese version, Spanish version.

In addition we have prepared a document containing frequently asked questions and answers on the topic.

For more technical information, please see the NXP Application Note 'MIFARE and handling of UIDs'.

Webinars

We have scheduled a series of interactive Webinars. The first ones will take place May 26th 9:00 & 17:00 CET.

To participate you can see the online presentation with the Webex tool and listen to the presentation using a telephone conferencing system. Please find below information on how to access the Webex conference and telephone dial numbers.

Session 1

• Topic: 4 Byte & 7 Byte UIDs for MIFARE products
• Date: Wednesday, May 26th, 2010
• Time: 9:00 am, Europe Standard Time (GMT +01:00, Berlin)
• Meeting Number: 704 313 163
• Meeting Password: MIFARE4-7BID

Please click the link below to see more information, or to join the meeting.

To join the online meeting:

1. Go to https://nxp.webex.com/nxp/j.php?S=704313163
2. Click on 'Attend a Meeting'
3. Enter Meeting number: 704313163
4. Enter your name and email address.
5. Enter the meeting password: MIFARE4-7BID
6. Click "Join Now".

Session 2

• Topic: 4 Byte & 7 Byte UID for MIFARE products
• Date: Wednesday, May 26th, 2010
• Time: 5:00 pm, Europe Standard Time (GMT +01:00, Berlin)
• Meeting Number: 709 119 600
• Meeting Password: MIFARE4-7BID

Please click the link below to see more information, or to join the meeting.

To join the online meeting:

1. Go to https://nxp.webex.com/nxp/j.php?S=709119600
2. Click on 'Attend a Meeting'
3. Enter Meeting number: 709119600
4. Enter your name and email address.
5. Enter the meeting password: MIFARE4-7BID
6. Click "Join Now".

Phone Conference

• Dial in code: 3907601007#
• Dial in numbers:
  Austria: +43 (0)1 36027 70017
  Belgium: +32 (0)2 620 0180
  Brazil: +55 11 3351 7093
  Finland: +358 (0)9 8171 0289
  France: +33 (0)1 70 48 00 47
  Germany: +49 (0)69 2999 3456
  Hong Kong: +852 3060 6037
  India: 8004401375
  Israel: 1809 462 255
  Italy: +39 02 3859 120
  Japan: +81 (0) 3 4455 1414
  Malaysia: 60 (0) 3 6279 5022
  Mexico: 001 800 367 1068
  Philippines: +65 6415 7912
  Russia: +7 495 411 5579
  Singapore: +65 6415 7912
  South Korea: 0079861361198
  Spain: +34 91 375 4591
  Switzerland: +41 (0)22 567 5209
  The Netherlands: +31 (0)20 654 5604
  Turkey: +44 (0)20 7660 0197
  United Kingdom: +44 (0)20 7660 0197
  U.S.A.: +1 703 621 9086

For assistance

1. Go to https://nxp.webex.com/nxp/mc
2. On the left navigation bar, click "Support".