DS2705: SHA-1 Authentication Master

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ABSOLUTE MAXIMUM RATINGS

-0.3V to +5.5V

-0.3V to +18V

Continuous Source Current, MDQ

20mA

Operating Temperature Range

-40°C to +85°C

Storage Temperature Range

-55°C to +125°C

Soldering Temperature

See IPC/JEDEC J-STD-020A Specification

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 the absolute maximum rating conditions for extended periods may affect device.

DC ELECTRICAL CHARACTERISTICS

(2.5V

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

Active mode,

2.5

mA

Active mode,

90

130

mA

Supply Current

1

2

mA

Programming Voltage:

Program pulse (Notes 1, 3)

14.5

15.0

V

Input Logic High:

MDQ, SDQ, CHAL

(Note 1)

1.8

V

Input Logic Low:

MDQ, SDQ, CHAL

(Note 1)

0.6

V

Output Logic Low: MDQ, SDQ

0.4

V

Output Logic Low:

PASS, FAIL

0.4

V

Pulldown:

300

mA

Pulldown: SDQ, CHAL

(Note 5)

0.125

mA

Communication mode

(Note 6)

0.25

2.5

mA

Pullup: MDQ

Computation mode

V

Input Capacitance: MDQ, SDQ

60

pF

EEPROM RELIABILITY SPECIFICATION

(2.5V

PARAMETER

SYMBOL

CONDITIONS

MIN

TYP

MAX

UNITS

EEPROM Write Time

(Note 3)

15

ms

EEPROM Write Endurance

(Notes 3, 4)

1,000

Cycles