ST1335, ST1336
ST1355
5-Contact Memory Card IC
272-bit EEPROM with Advanced Security Mechanisms
DATA BRIEFING
s
s
s
s
s
s
s
s
s
s
5 V Single Supply Voltage
Counting Capability (two options)
鈥?up to 32767 (8
5
-1)
鈥?8 times reloadable, up to 4095 (8
4
-1)
Active Authentication Function (ST1335/1355)
Cipher Block Chaining Function (ST1355)
Memory Divided into :
鈥?16 bits of Circuit Identification
鈥?48 bits of Card Identification
鈥?40 bits of Count Data
鈥?16 bits for Validation Certificate
鈥?24 bits of Transport Code
鈥?64 bits of Issuer Data (ST1336) or
Authentication Secret Key (ST1335/1355)
鈥?32 bits of Anti-tearing Flags (optional)
鈥?56 bits of User data (optionally not erasable)
1 Million Erase/Write Cycle (minimum)
10 Year Data Retention (minimum)
3.5 ms Programming Time at 5 V (typical)
500
碌A
Supply Current at 5 V (typical)
250
碌A
Stand-by Current at 5 V (typical)
1
Micromodule
(D10)
1
1
1
Micromodule
(D15)
Wafer
DESCRIPTION
The members of the ST1335/1336/1355 family are
principally designed for use in prepaid Phonecard
applications. Each is a 272-bit EEPROM device,
with associated security logic and special fuses to
control memory access. The memory is arranged
as a matrix of 34 x 8 cells, accessed in a serial bit-
wise fashion for reading and programming, and in
a byte-wise fashion for internal erasing. An on-chip
Figure 1. Logic Diagram
VCC
RST
Table 1. Signal Names
CLK
RST
I/O
V
CC
GND
Clock
Reset
Data Input / Output
Supply Voltage
ST1335
ST1336
ST1355
CLK
I/O
GND
Ground
AI03106b
October 1999
Complete data available under NDA.
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STMICROELECTRONICS
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