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DS1834AU

P1-P3P4-P6P7-P7
DS1834/A/D
4 of 7
OUTPUT VALID CONDITIONS
All versions of the DS1834 can maintain valid outputs as long as one input remains above 1.2 volts.
However, the RST outputs on the DS1834 use a push-pull output structure which can maintain a valid
output below 1.2 volts. To sink current below 1.2 volts a resistor can be connected from RST to GND
(see Figure 5). This arrangement will maintain a valid value on the RST outputs even if all inputs are at 0
volts. During both power-up and power-down this arrangement will draw current when
RST is in the high
state. A value of about 100 kΩ=should be adequate to maintain a valid condition.
The DS1834A requires pull-up resistors on the outputs to maintain a valid output. The value of the
resistors is not critical in most cases but must be set low enough to pull the output to a high state. A
common value used is 10 kΩs (see Figure 6 and Figure 7).
APPLICATION DIAGRAM:
RST VALID TO 0 VOLTS V
CC
ON THE DS1834 Figure 5
APPLICATION DIAGRAM: DS1834A NMOS OUTPUTS Figure 6
Note: If outputs are pulled-up to different voltages the outputs can not be connected to form a wired
"AND".
APPLICATION DIAGRAM: DS1834A WIRED "AND" OUTPUT Figure 7
DS1834/A/D
5 of 7
TIMING DIAGRAM: POWER-DOWN Figure 8
TIMING DIAGRAM: POWER-UP Figure 9
DS1834/A/D
6 of 7
ABSOLUTE MAXIMUM RATINGS*
Voltage on V
IN
Pin Relative to Ground -0.5V to +7.0V
Voltage on RST (5V) Pin Relative to Ground -0.5V to +0.5V
IN
+ 0.5V (DS1834 & DS1834D)
Voltage on RST (3.3V) Pin Relative to Ground -0.5V to +3.3V
IN
+ 0.5V (DS1834 & DS1834D)
Voltage on PBRST & RST (DS1834A) Pin
Relative to Ground -0.5 to the greater of 0.5V
IN
+ 0.5V or 3V
IN
+ 0.5V
Operating Temperature -40°C to +85°C
Storage Temperature -55°C to +125°C
Soldering Temperature 260°C for 10 seconds
* 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 (-40°C to +85°C)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
5V
IN
(Supply Voltage) V
IN
1.2 5.5 V 1
3V
IN
(Supply Voltage) V
IN
1.2 5.5 V 1
PBRST Input High Level
V
IH
2
V
IN(MAX)
-0.4
V
IN(MAX)
+0.3
V
V
1
1, 3
PBRST Input Low Level
V
IL
-0.3 0.5 V 1
DC ELECTRICAL CHARACTERISTICS (-40°C to +85°C; V
CC
=1.2V to 5.5V)
PARAMETER SYMBOL MIN TYP MAX UNITS NOTES
Output Voltage V
OH
V
IN
-0.1V
V1
Input Leakage I
IL
-1.0 +1.0 µA4
Output Current @ 2.4V I
OH
350 µA5
Output Current @ 0.4V I
OL
+10 mA 5
Operating Current @ Ο 5.5V
IN
I
CC
50 µA6
Operating Current @ Ο 3.6V
IN
I
CC
35 µA7
5V
IN
Trip Point (TOL=GND) V
INTP
4.50 4.63 4.75 V 1
5V
IN
Trip Point (TOL=5V
IN
)V
INTP
4.25 4.38 4.49 V 1
3.3V
IN
Trip Point (TOL=GND) V
INTP
2.80 2.88 2.97 V 1
3.3V
IN
Trip Point (TOL=3.3V
IN
)V
INTP
2.47 2.55 2.64 V 1
Output Capacitance C
OUT
10 pF
P1-P3P4-P6P7-P7

DS1834AU

Mfr. #:
Buy DS1834AU
Manufacturer:
Maxim Integrated
Description:
Supervisory Circuits Dual EconoReset w/Pushbutton
Lifecycle:
New from this manufacturer.
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