Rainbow Electronics DS2705 - Manual (Page 2)

DS2705: SHA-1 Authentication Master
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ABSOLUTE MAXIMUM RATINGS
Voltage Range on All Pins (except VPP), Relative to V
SS
-0.3V to +5.5V
Voltage Range on V
PP
Pin, Relative to V
SS
-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 £ V
DD
£ 5.5V, T
A
= -20°C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
I
DD1
Active mode,
MDQ low, I
O_MDQ
= 0
2.5 mA
I
DD2
Active mode,
MDQ idle, I
O_MDQ
= 0
90 130 mA
Supply Current
I
DD3
Sleep mode, I
O_MDQ
= 0 (Note 2) 1 2 mA
Programming Voltage: V
PP
V
PP
Program pulse (Notes 1, 3) 14.5 15.0 V
Input Logic High:
MDQ, SDQ, CHAL
V
IH
(Note 1) 1.8 V
Input Logic Low:
MDQ, SDQ, CHAL
V
IL
(Note 1) 0.6 V
Output Logic Low: MDQ, SDQ V
OL1
I
OL
= 4mA (Note 1) 0.4 V
Output Logic Low: PASS, FAIL V
OL2
I
OL
= 10mA (Note 1) 0.4 V
Pulldown: V
PP
I
PD1
300 mA
Pulldown: SDQ, CHAL I
PD2
(Note 5) 0.125 mA
I
OH
Communication mode
(Note 6)
0.25 2.5 mA
Pullup: MDQ
V
OH
Computation mode
I
OH
= 2.0mA (Note 7)
V
DD
- 0.1 V
Input Capacitance: MDQ, SDQ C
IN
60 pF
EEPROM RELIABILITY SPECIFICATION
(2.5V £ V
DD
£ 5.5V, T
A
= -20 °C to +85°C.)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
EEPROM Write Time t
EEW
(Note 3) 15 ms
EEPROM Write Endurance N
EEC
(Notes 3, 4) 1,000 Cycles