DS1642 Datasheet, PDF (5/11 Pages) Dallas Semiconductor – Nonvolatile Timekeeping RAM

ABSOLUTE MAXIMUM RATINGS*
Voltage on Any Pin Relative to Ground
Operating Temperature
Storage Temperature
Soldering Temperature
DS1642
–0.3V to +7.0V
0°C to 70°C
–20°C to +70°C
260°C for 10 seconds (See Note 6)
* This is a stress rating only and functional operation of the device at these or any other conditions above
those indicated in the operation sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods of time may affect reliability.
RECOMMENDED DC OPERATING CONDITIONS
PARAMETER
SYMBOL MIN TYP
MAX
Logic 1 Voltage All Inputs
V_IH
2.2
Logic 0 Voltage All Inputs
V_IL
-0.3
V_CC+0.3
0.8
(0°C to 70°C)
UNITS NOTES
V
1
V
1
DC ELECTRICAL CHARACTERISTICS
(0°C < t_A < 70°C; V_CC (MAX) < V_CC < V_CC (MIN)
PARAMETER
SYMBOL MIN TYP
MAX
UNITS NOTES
Active Supply Current
I_CC
TTL Standby Current
I_CC1
15
50
1
3
mA
2, 3
mA
2, 3
( CE = V_IH)
CMOS Standby Current
I_CC2
1
3
mA
2, 3
( CE < V_CC-0.2V)
Input Leakage Current
(any input)
I_IL
-1
+1
µA
I/O Leakage Current
(any output)
I_OL
-1
+1
µA
Output Logic 1 Voltage
V_OH
2.4
1
(I_OUT = -1.0 mA)
Output Logic 0 Voltage
V_OL
0.4
1
(I_OUT = +2.1 mA)
Write Protection Voltage
V_PF
4.25 4.37
4.50
V
1
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