DS2502-E64+ Maxim Integrated Products, DS2502-E64+ Datasheet - Page 3

• Manufacturer Part Number: DS2502-E64+
• Description: IC OTP 1KBIT TO92-3
• Manufacturer: Maxim Integrated Products

Specifications of DS2502-E64+

• Format - Memory: EPROMs (with MAC Address)
• Memory Type: OTP EPROM
• Memory Size: 1K (1K x 1)
• Interface: 1-Wire Serial
• Operating Temperature: -40°C ~ 85°C
• Package / Case: TO-92-3 (Standard Body), TO-226
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Voltage - Supply: -
• Speed: -

DS2502-E64
The four bytes at memory addresses 01h to 04h contain the UniqueWare Project ID 00001128h. The two
bytes at addresses 0Dh and 0Eh are the inverted 16-bit CRC over the length byte, Project ID and EUI-64
value. The least significant byte of the CRC is stored at address 0Dh. This CRC is generated according to
16
15
2
the standardized CRC16 polynomial function X
+ X
+ X
+ 1. For more details on generating CRC
values including examples in both hardware and software, see Application Note 27,
Understanding and
Using Cyclic Redundancy Checks with Maxim iButton
Products.
The contents of the memory address range 0Fh to 1Fh is FFh. These cells cannot be altered since the
whole memory page is write-protected. The memory range from 20h to 7Fh, however, is user-
programmable. It can be write-protected by programming the corresponding write-protect bit in the status
memory of the DS2502-E64.
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