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:
鈥?16 bits of Circuit Identification
鈥?48 bits of Card Identification
鈥?48 bits of Count Data
鈥?16 bits of Certificate
鈥?24 bits of Transport Code
鈥?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 V
CC
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 ac-
cess. The circuit includes counting capabilities
and thus is very well adapted to prepaid card ap-
plications.
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
V
CC
GND
Clock
Reset
Serial Data Input/Output
Supply Voltage
Ground
CLK
GND
DS05B01
October 1999
Complete data available under NDA.
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STMICROELECTRONICS
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