Datasheet
Operation STM6700, STM6710
10/21 Doc ID 16887 Rev 2
2.2 Adjustable thresholds (input configurations)
The STM6700/STM6710 may be configured to monitor several options with adjustable reset
thresholds. The threshold voltages at each adjustable input VxIN is typically 0.62 V. Thus to
monitor a voltage > 0.62 V, a resistor divider network as shown in Figure 7 can be used.
The STM6710 allows users to customize the minimum voltage sense level with adjustable
reset thresholds. The threshold voltage at each adjustable input VxIN is typically 0.62 V.
For example, the user can adjust the voltage input threshold (VTHx) for V1IN, V3IN and
V4IN inputs. To do this, connect an external resistor divider network to the VxIN pin in order
to set the trip point to some other voltage above 620 mV according to Equation 1 and
Equation 2 which is also shown in Figure 7.
Equation 1
or solved in terms of R1:
Equation 2
The STM6700/STM6710 have an input current of less than ±0.2 µA (±0.4 µA for VIN1)
on their adjustable inputs, therefore resistor values of up to 100 kΩ can be used for R2
with < 1% error.
Figure 7. Adjustable thresholds monitoring
V
THx
0.62V
R1 R2+()
R2
---------------------------
×=
R1 R2
V
THX
0.62V
--------------- - 1–
⎝⎠
⎛⎞
=