November 2006
rev 1.5
ASM1834/A/D
Block Diagram
ASM1834A
1
ASM1834
5 VIN
2
5V RESET
3
5V Tolerance
Bias
+
For ASM1834D
5 VTOL
5V RESET
2
350ms Delay
5V RESET
Low TC
Reference
-
7
(ASM1834D)
3.3V RESET
40kΩ
5
Pushbutton Level
Sense and Debounce
PBRST
8
3.3 VIN
6
For ASM1834D
3.3 VTOL
3.3V Tolerance
Bias
+
3.3V RESET
7
350ms Delay
3.3V RESET (ASM1834D)
4
GND
-
Pin Configuration
Pin Description
1
8
7
6
5
3.3VIN
5VIN
ASM1834
ASM1834A
ASM1834D
2
3
3.3V RESET *
5V RESET *
5V TOL
3.3V TOL
PBRST
4
GND
* AS1834D reset outputs are active HIGH (5V RESET and 3.3V RESET)
Outputs are open-drain for AS1834A.
Pin #
Pin Name
Function
5VIN
1
5V power supply input.
5V RESET
5V RESET
5V reset output (Active LOW, ASM1834, ASM1834A. Open drain outputs for ASM1834A).
5V reset output (Active HIGH, AS1834D).
2
5V input tolerance select: 10% tolerance for 5VTOL= 5VIN and 5% tolerance for 5VTOL = GND
3
4
5
5V TOL
GND
Ground.
PBRST
Debounced manual pushbutton reset input (40kΩ internal pull-up).
3.3V input tolerance select: 20% tolerance for 3.3VTOL = 3.3VIN and 10% tolerance for
3.3VTOL=GND.
6
3.3V TOL
3.3V RESET 3.3V reset output (Active LOW, ASM1834, ASM1834A. Open drain outputs for ASM1834A).
3.3V RESET 3.3V reset output (Active HIGH, AS1834D).
7
8
3.3VIN
3.3V power supply input.
2 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 ]
