Datasheet Microchip MIC1232 — 数据表

MIC1232
5V Voltage Supervisor with Manual Reset,
Watchdog Timer and Dual Reset Outputs General Description Features The MIC1232 is a low-current microprocessor supervisor
for monitoring 5V systems. The device features logic
selectable (TOL) reset thresholds of 5% or 10% of 5V; a
pushbutton reset input (/PBRST); a watchdog timer with
three-state selectable (TD) timeout periods of 150ms,
600ms, or 1.2s; a fixed reset timeout period of 250ms
(min); and active-low open-drain reset (/RST) and activehigh push-pull reset (RST) outputs. The /RST output
maintains a valid reset condition for VCC as low as 1.4V.
The MIC1232 asserts a reset condition if the supply
voltage drops below the reset threshold, the pushbutton
reset is asserted low, or the watchdog timer does not see
a high-to-low transition on the watchdog timer input within
the watchdog timer period. A reset condition is held for the
reset timeout period of 250ms (min) after the pushbutton
input is released or after the supply voltage increases
above the reset threshold voltage.
The MIC1232 is a drop-in replacement for the DS1232,
MAX1232, and TC1232. It consumes a low 18ВµA (typ) of
supply current, 40ВµA (max). This is one-tenth the max
current of the DS1232, and one-quarter the max current of
the MAX1232 and TC1232. It operates over the –40C to …