IC Card EEPROMs
MN63154
EEPROM for IC Cards
Overview
The MN63154 is an EEPROM for use in IC cards. It
features security features and an address specification
system using opcode input.
Low cost combined with high security makes the chips
ideal for use in prepaid cards and other types of IC cards.
Pad Assignment
GND
1
5
4
V
DD
RST
CLK
Features
Easy-to-use control system
• Address specification system using opcode input over
a 3-wire interface (CLK, I/O, and RST)
• Automatic erasing and writing using a single 5 volt
power supply
Flexible memory-layout
The memory is divided into 11 areas. Six areas
containing 500 bytes are freely usable.
Advanced security features
• Verification of IC card authenticity
The IC passes entered data through a random
number generator circuit on its way to output to
provide a check of card validity.
• Protection against malicious experimentation
Four or more unsuccessful attempts to access the
IC card render it permanently unusable.
• Protection of individual memory areas on the card
Read or write access to a memory area requires
matches for both security and condition codes.
There is also a condition code for permanently
disabling re-write.
• Mixed configuration of EPROM and EEPROM
Individual areas consist of EPROM or EEPROM.
High reliability
• Write cycles: 10,000 times
• Data storage interval: 10 years
I/O
2
3
(TOP VIEW)
Note: This product is sold as wafers.
Applications
IC cards
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IC Card EEPROMs
Pin Descriptions
Pin No.
1
2
3
4
5
Symbol
GND
I/O
CLK
RST
V
DD
Pin Name
Ground
Data I/O
Clock
Reset
Power supply
I/O
I
I/O
I
I
I
MN63154
Electrical Characteristics
V
CC
=4.5 to 5.5V, Ta=–10˚C to +70˚C
Parameter
Power supply voltage
"L" level input leakage current
"H" level input leakage current
V
CC
power supply current
(during operation)
V
CC
power supply current
(during standby)
Symbol
V
CC
I
LIL
I
LIH
I
CC
I
SB
Test Conditions
min
4.5
–10
–10
max
5.5
10
10
5.45
0.18
Unit
V
µA
µA
mA
mA
V
CC
=5.5V
CLK=800kHz
CLK="L"
I/O="H"
—
—
Notes
1: I/O pins use N-channel, open drain configuration.
2: Input voltages, output voltages, and other items not listed above conform to ISO/IEC 7816-3.
Function Descriptions
Orders
READ
WRITE
VERIFY
RNGEN
RESET
EWEN
Start bit
0
0
0
0
0
0
Operation code
10
01
11
00
11
00
Address
A
8
, A
7
to A
0
A
8
, A
7
to A
0
000001010
000001010
111111111
1xxxxxxxx
Data
D
0
, D
1
to D
31
D
0
, D
1
to D
15
D
0
, D
1
to D
31
D
0
, D
1
to D
31
D
O0
, D
O1
to D
O31
—
—
Contents
Read
Write
Verify code
Verify code, generate
random number
Reset
Enable write
Note:
x
means "don’t care".
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