IZ4428

w Byte - directed addressing; IZ4428 m o c . 1К-byte EEPROM U microcircuit with function of protection for 4 t writing and programmable secret code. e e is designed to use in intellectual plastic cards. Sphere of application: h Microcircuit IZ4428 S excess control systems, member cards, smart cards. medical insurance, a at .D Features: w w 1024 x 8 - arrangement of EEPROM; Protection of memory writing; 1024 х 1 bit arrangement of memory protection ; Response for reset; Minimum 10000 cycles of erasure / writing ; Information storage time - 5 years ; Location of contact pads and serial interface in accordance with ISO 7816 standard; Data in memory can be changed only after introduction of correct 2-byte programmable secret code (PSC); Purpose of IC contact pads CP 01 02 03 04 05 Symbol I/O CLK RST Vcc GND w w w t a .D Function Bidirectional data line (open drain ) clock rate input control input (reset ) supply voltage general S a e h U 4 t e .c m o w w w .D a S a t e e h U 4 t m o .c IZ4428 Block diagram Base memory EEPROM 1024x8 bit protcetion memory PROM 1024x1 bit High voltage multiplier Decoder of lines and column with ampliffers Programming control unit Circuit of reset and holding Secret logit unit Interface unit Vcc GND I/O RST CLK Graphical symbol of IC 02 03 CLK RST EE PROM <-> I/O Vcc GND 01 04 05 Operating temperature range Operating temperature range from -35°С to +100°С. IZ4428 Extreme modes Symbol VСС VIH VIL Т Name of pa...