November 2006
rev 1.5
ASM1834/A/D
5V
5V or 3.3V
3.3V
10kΩ
ASM1834A
8
7
6
1
2
3
5V
IN
3.3V
IN
3.3VRESET
3.3V TOL
PBRST
5VRESET
5V TOL
GND
4
5
Figure 7: ASM1834A Wired “OR” Connection
Trip Point Tolerance Selection
If 3.3VTOL is connected to the 3.3V supply input, a 20%
tolerance is selected. If 3.3VTOL is grounded, a 10% tolerance
is selected. (Refer table below). The 3.3VTOL and 5VTOL
tolerance select inputs should be tied to the ground or to the
respective input supply voltage pin, 3.3VIN or 5VIN.
The 3.3VTOL and 5VTOL inputs allow independent selection of
the reset trip points. If 5VTOL is connected to the 5V supply
input, a 10% tolerance is selected. If 5VTOL is grounded, a 5%
tolerance is selected.
3.3V Input
5V Input
Tolerance Select
TRIP Point (V)
TRIP Point (V)
5V
3.3V
Tolerance
Tolerance
MIN
NOM
MAX
MIN
NOM
MAX
5VTOL = 5VIN
-
-
-
-
10%
4.25
4.38
4.49
5VTOL = GND
-
-
-
-
5%
4.5
4.63
4.75
3.3VTOL = 3.3VIN
20%
10%
2.47
2.80
2.55
2.88
2.64
2.97
-
-
-
-
-
-
-
-
3.3VTOL = GND
5 of 10
Dual 5V and 3.3V µP Power Supply Supervisor with Manual Reset
Notice: The information in this document is subject to change without notice
PULSECORE [ PulseCore Semiconductor ]
