“Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. Except for “Operating Temperature Range”
they are not meant to imply that the devices should be operated at these limits. The table of “Electrical Characteristics” provides conditions for actual device
operation.
Note 3:
Unless otherwise specified min/max limits apply across the 0˚C to +75˚C temperature range for the DS1489 and DS1489A.
Note 4:
All currents into device pins shown as positive, out of device pins as negative, all voltages referenced to ground unless otherwise noted. All values shown
as max or min on absolute value basis.
Note 5:
These specifications apply for response control pin = open.
3
www.national.com
DS1489/DS1489A
Typical Characteristics
V
CC
= 5.0V, T
A
= +25˚C unless otherwise noted
00577707
00577710
FIGURE 2. Input Current
FIGURE 5. Input Threshold Voltage vs Temperature
00577708
00577711
FIGURE 3. DS1489 Input Threshold Voltage Adjustment
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