STM1061 STMicroelectronics, STM1061 Datasheet - Page 8

• Manufacturer Part Number: STM1061
• Description: Low power voltage detector
• Manufacturer: STMicroelectronics

Operation
3
3.1
3.2
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Operation
Output
The STM1061 Voltage Detector monitors system voltages from 1.6 to 5V in 100mV
increments. The detector is designed to ignore fast transients on V
hysteresis (V
below the Voltage Detect Threshold (V
V
valid down to V
The STM1061has 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 (see
on page
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 V
Negative-Going V
The STM1061 device is relatively immune to negative-going V
graph (see
transient can have without causing a reset pulse. As the magnitude of the transient
increases (further below the threshold), the maximum allowable pulse width decreases. Any
combination of duration and overdrive which lies under the curve will NOT generate a reset
signal.
A 0.1µF bypass capacitor mounted as close as possible to the V
transient immunity.
CC
goes above the Voltage Detect Release (V
6). Select a resistor value large enough to register a logic low, and small enough to
Figure 11 on page
HYST
CC
CC
). The STM1061 asserts an output signal (OUT) whenever V
.
=0.7V at 25°C.
CC
11) indicates the maximum pulse width a negative V
Transients and Undershoot
TH–
). The output signal (OUT) stays asserted until
TH+
). Output voltage (V
CC
CC
transients (glitches). The
CC
pin provides additional
and has a voltage
OUT
) is guaranteed
CC
goes
STM1061
Figure 6
CC