DS1238S/T&R Maxim Integrated, DS1238S/T&R Datasheet - Page 6
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DS1238S/T&R
Manufacturer Part Number
DS1238S/T&R
Description
Supervisory Circuits
Manufacturer
Maxim Integrated
Series
DS1238r
Datasheet
1.DS1238STR.pdf
(14 pages)
Specifications of DS1238S/T&R
Number Of Voltages Monitored
1
Monitored Voltage
5 V
Undervoltage Threshold
4.25 V
Overvoltage Threshold
4.5 V
Output Type
Active High, Active Low
Manual Reset
Resettable
Watchdog
Watchdog
Battery Backup Switching
Backup
Power-up Reset Delay (typ)
150 ms
Supply Voltage - Max
5.5 V
Maximum Operating Temperature
+ 70 C
Mounting Style
SMD/SMT
Package / Case
SOIC-16 Wide
Chip Enable Signals
Yes
Minimum Operating Temperature
0 C
Power Fail Detection
Yes
Supply Current (typ)
4000 uA
Supply Voltage - Min
4.5 V
NON-MASKABLE INTERRUPT Figure 5
NMI
V
MAXVOLTAGE =
Example 1: 5 Volt Supply, R2 = 10k Ohms,
V
4.8 =
SENSE
SENSE
FROM IN INPUT Figure 6
R1
=
= 4.8 Volts
10k
R1
10k
R2
R2
x 1.27 R1 = 27.8k Ohm
x 1.27
V
1.27
SENSE
x 5.0 = VMAX
6 of 14
Example 2: 12 Volt Supply, R2 = 10k Ohms,
V
9.0 =
V
SENSE
MAX
=
R1
= 9.0 Volts
10k
1.27
9.00
10k
x 5.0 = 35.4 Volts
x 1.27 R1 = 60.9k Ohm
DS1238