ST1305B

ST1305B Memory Card IC 192 bit High Endurance EEPROM With Secure Logic Access Control DATA BRIEFING s s Single Supply Voltage (5 V) Memory Divided Into: – 16 bits of Circuit Identification – 48 bits of Card Identification – 48 bits of Count Data – 16 bits of Certificate – 24 bits of Transport Code – 64 bits of Issuer Data 1 1 1 1 s s Counting Capability up to 262,144 Circuit Protected by Transport Code for Delivery from ST to the Customer 5 External Contacts Only (ISO 7816 Compatible) Answer to Reset (Fully Compatible with ISO 7816-3) E.S.D. Protection Greater Than 4000 V Power-On and Low VCC Reset 1 Million Erase/Write Cycles (minimum) 10 Year Data Retention (minimum) 5 ms Programming Time (typical) Micromodule (D10) Micromodule (D15) s s s s s s s Wafer DESCRIPTION The ST1305B is a 192-bit EEPROM device with associated security logic to control memory access. The circuit includes counting capabilities and thus is very well adapted to prepaid card applications. The ST1305B is protected by hard-wired security logic and special fuses. The memory is arranged as a matrix of 24x8 cells, accessed in a serial bit- Figure 1. Logic Diagram VCC RST ST1305B I/O Table 1. Signal Names CLK RST I/O VCC GND Clock Reset Serial Data Input/Output Supply Voltage Ground CLK GND DS05B01 October 1999 Complete data available under NDA. 1/2 ST1305B wise fashion for reading and programming, and in a byte-wise fashion for internal erasing. The device recognises three commands issued ...