Description

STM1831

6/24

Doc ID 18180 Rev 1

1.1

Pin descriptions

See Figure 1 and Table 1 for a brief overview of the signals available on this device.

This pin is used to provide power to the device. A 0.1 µF decoupling ceramic capacitor is

device as possible.

Reset output (RST)

The STM1831 has an open drain, active-low output which sinks current when the output is

asserted. Connect a pull-up resistor from RST to any supply voltage up to 6 V (see

Figure 4). 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 10 k

Ω pull-up is sufficient in most applications.

The advantages of open drain output include the ability to connect more open drain outputs

in parallel (wired OR connections) as well as connecting the output to a power supply

Any external leakage due to poor quality timing capacitors or excessive humidity may cause

by as great a distance as possible. Low-leakage timing capacitors (ceramic or film capacitor)

should be used.