| The STM1061 Voltage Detector monitors system voltages
from 1.6V to 5V in 100mV increments. The detector is designed
to ignore fast transients on Vcc and has a voltage hysteresis
(Vhyst). The STM1061 asserts an output signal (/OUT) whenever
Vcc goes below the Voltage Detect Threshold (Vth–). The
output signal (/OUT) stays asserted until Vcc goes above the Voltage
Detect Release (Vth+). Output voltage (Vout) is guaranteed valid
down to Vcc =0.7V at 25°C.
The STM1061 has an open drain active-low output which will sink
current when output is asserted. Connect a pull-up resistor from
/OUT to any supply voltage up to 6V. Select a resistor value large
enough to register a logic low, and small enough to register a
logic high while all of the input current and leakage paths connected
to the reset output line are being supplied. A 10k pull-up is
sufficient in most applications.
The advantages of open drain output is the ability to connect
more open drain outputs in parallel (wired OR connections) as
well as connect the output to a power supply voltage different
from Vcc. |
