IMP1834AS Datasheet PDF - A1 PROs co., Ltd.
A1 PROs co., Ltd.
Dual 5V and 3.3V µP Power
Supply Supervisors w/Manual Reset
– Push-Pull and Open-Drain Outputs
– Selectable Trip Point Tolerance
The IMP1834 supervisors simultaneously monitor both 3.3V and 5V power sources and issue reset signals when either supply is out of tolerance. When an out-of-tolerance condition is detected, the output-reset signal of the affected supply becomes active and resets the system microprocessor/microcontroller. On power-up and after the supply voltage returns to an in-tolerance condition, the reset signal remains active for approximately 350ms. This allows the power supply and system microprocessor to stabilize.
KEY FEATUREs
â—† Lower power, pin-compatible replacements for
the Dallas DS1834
— 40% lower maximum supply current:
30µA vs 50µA
â—† Monitor 5V and 3.3V supplies simultaneously
â—† 5V and 3.3V power-on reset
â—† 350ms reset time
â—† Debounced pushbutton reset input
â—† Push-Pull CMOS output
— IMP1834, IMP1834D
— Eliminates external pull-up resistors
— Active LOW (IMP1834), HIGH (IMP1834D)
â—† Open drain output
— IMP1834A
— Active LOW
â—† Selectable 5V and 3.3V trip point tolerance
â—† Internal power drawn from highest input
voltage, 5V or 3.3V
â—† Precision temperature-compensated voltage
reference and comparator
â—† Low-cost surface mount SO, compact
MicroSO and DIP packages
◆ Wide operating temperature, –40°C to +85°C
