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ABRIDGED DATA SHEET
ISO 15693-Compliant Secure Memory
ABSOLUTE MAXIMUM RATINGS
Maximum Incident Magnetic Field Strength ..........141.5dBμA/m
Operating Temperature Range ...........................-25°C to +50°C
Relative Humidity ..............................................(Water Resistant)
Storage Temperature Range ...............................-25°C to +50°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(T A = -25°C to +50°C, unless otherwise noted.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
SHA-1 ENGINE
SHA-1 Computation Time
t CSHA
(Note 1)
Refer to the full data sheet.
ms
EEPROM
Programming Time
Endurance
Data Retention
t PROG
N CYCLE
t RET
(Note 1)
At +25°C (Note 2)
(Note 3)
9
200,000
40
10
ms
Cycles
Years
RF INTERFACE
Carrier Frequency
f C
(Notes 4, 5)
13.553
13.560
13.567
MHz
Activation Field Strength
(Note 1)
Write Field Strength (Note 1)
Maximum Field Strength
Power-Up Time
H MIN
H WR
H MAX
t POR
At +25°C, MAX66140E
At +25°C, MAX66140K
At +25°C, MAX66140E
At +25°C, MAX66140K
At +25°C (Note 1)
(Notes 1, 6)
110.5
122.0
110.7
122.4
137.5
1.0
dBμA/m
dBμA/m
dBμA/m
ms
Note 1: Guaranteed by simulation, not production tested.
Note 2: Write-cycle endurance is degraded as T A increases. Not 100% production tested; guaranteed by reliability monitor sampling.
Note 3: Guaranteed by 100% production test at elevated temperature for a shorter time; equivalence of this production test to data
sheet limit at operating temperature range is established by reliability testing.
Note 4: System requirement.
Note 5: Production tested at 13.56MHz only.
Note 6: Measured from the time at which the incident field is present with strength greater than or equal to H (MIN) to the time at
which the MAX66140’s internal power-on reset signal is deasserted and the device is ready to receive a command frame.
Not characterized or production tested; guaranteed by simulation only.
2
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