IZ1991 Datasheet (Integral) - CIRCUIT OF MULTIFUNCTIONAL ELECTRONIC KEY

IZ1991, CIRCUIT OF MULTIFUNCTIONAL ELECTRONIC KEY

Contact pad num- ber Symbol Function 01 TEST1 Test pad 02 TEST2 Test pad 03 GND Common pin 04 DATA Data I/O 05 UDD Supply voltage 06 TEST3 Test pad 07 TEST4 Test pad 08 TEST5 Test pad 09 TEST6 Test pad 10 TEST7 Test pad 11 TEST8 Test pad 12 TEST9 Test pad 13 TES

IZ1991 CIRCUIT OF MULTIFUNCTIONAL ELECTRONIC KEY WITH DATA PROTECTION (functional equvivalent DS1991 «Maxim-Dallas Semiconductor») IZ1991 circuit of multifunctional electronic key with data protection is perposed for autonomos identification in systems of access control, registration and identification of object.

Circuit performs following functions: One-time data writing in to ROM; Data storage and reading out of ROM; CRC-code (Cyclic Redundancy Check)

IZ1991 Features

* 1152-bit secure memory with read/write possibility;

* Secure memory can be decoded only on matching 64-bit password

* Memory is partitioned into 3 blocks of 384 bits each

* 64-bit password and ID fields for each memory block

* 512-bit scratchpad ensures da