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Page 56 of 76
User Manual, SecureHead USB and UART Interface
Appendix D Magnetic Stripe Standard Formats
ISO Credit Card Format
ISO stands for International Standards Organization
Track 1
Field ID
Character
Contents
Length
a
Start Sentinel
1
b
Format Code “B”
1
c
Account Number
12 or 19
d
Separator “^”
1
e
Cardholder Name
variable
f
Separator “^”
1
g
Expiration date 4
h
Optional Discretionary data variable
i
End Sentinel
1
j
Linear Redundancy Check
(LRC) Character
1
Track 2
a
Start Sentinel
1
b
Account Number
12 or 19
c
Separator “=”
1
d
Expiration date “YYMM” 4
e
Optional discretionary data variable
f
End Sentinel
1
g
Linear Redundancy Check
(LRC) Character
1