Operation

STM6700, STM6710

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Doc ID 16887 Rev 2

2

Operation

The STM6710 is capable of monitoring up to 4 voltages in a multisupply application. The

device is available in several preset voltage thresholds for power supplies of 1.8 V, 2.5 V,

3.0 V, 3.3 V and 5.0 V. The STM6710 is powered by the V2IN pin which is also a monitored

voltage, thus making this a quad voltage monitor. The STM6710Q and STM6700 use this

voltage inputs. If any of the monitored input voltage falls below its associated threshold, the

active low reset output is asserted and remains low as long as V1IN or V2IN remains above

1.0 V.

Figure 4.

Hardware hookup (typical application diagram)

2.1

RESET output configuration

The RESET output asserts low if a monitored input voltage drops below its threshold. This is

However, many applications may not require an external pull-up resistor. In case a pull-up

resistor is required and is connected to a voltage ranging from 0 to 5.5 V (as shown in

Figure 5), it can overdrive the weak internal pull-up. The STM6710 has built-in circuitry to

prevent this reverse current flow to V2IN under this condition.

Figure 5.

Interface to external pull-up using a different supply voltage

V1IN

V2IN (V

V3IN

V4IN

RESET

GND

SUPPLIES

TO BE

MONITORED

µP

STM6710

AM04620v1