Datasheet
DS1644/DS1644P
7 of 14
ABSOLUTE MAXIMUM RATINGS
Voltage Range on Any Pin Relative to Ground……………………………………………..-0.3V to +6.0V
Storage Temperature Range………………………………………………-40°C to +85°C, Noncondensing
Operating Temperature Range…….................…….......……………………0°C to +70°C, Noncondensing
Lead Temperature (soldering, 10s) ...................................................................................................+260°C
Soldering Temperature (reflow, PowerCap package) .......................................................................+260°C
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 (Over the Operating Range)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Supply Voltage V
CC
4.5 5.5 V 1
Logic 1 Voltage All Inputs V
IH
2.2 V
CC
+0.3 V
Logic 0 Voltage All Inputs V
IL
-0.3 0.8 V
DC ELECTRICAL CHARACTERISTICS (Over the Operating Range)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Average V
CC
Power Supply Current I
CC1
75 mA 3
TTL Standby Current (CE =V
IH
)
I
CC2
6 mA 3
CMOS Standby Current (CE =V
CC
-
0.2V)
I
CC3
4.0 mA 3
Input Leakage Current (any input) I
IL
-1 +1
A
Output Leakage Current I
OL
-1 +1
A
Output Logic 1 Voltage
(I
OUT
= -1.0 mA)
V
OH
2.4 V
Output Logic 0 Voltage
(I
OUT
= +2.1 mA)
V
OL
0.4 V
Power-Fail Voltage V
PF
4.0 4.5 V










