Pin descriptions SR2
6/22 DocID026047 Rev 2
2 Pin descriptions
2.1 Power supply (V
CC
)
This pin is used to provide power to the Smart Reset™ device. A 0.1 µF ceramic decoupling
capacitor is recommended to be connected between the V
CC
and V
SS
pins, as close to the
SR2 device as possible.
2.2 Ground (V
SS
)
Ground pin for the device.
2.3 Smart Reset™ input (SR0)
Push-button Smart Reset™ input is active low with optional pull-up resistor. Both SR
inputs need to be asserted simultaneously for at least t
SRC
to assert the reset output (RST).
By connecting a voltage higher than V
CC
to the SR0 the device enters a test mode (see
Section 1: Description on page 3 for more information).
2.4 Smart Reset™ input (SR1)
Push-button Smart Reset™ input is active low with optional pull-up resistor. Both SR inputs
need to be asserted simultaneously for at least t
SRC
to assert the reset output (RST).
2.5 Reset output (RST)
RST is active low or active high, push-pull or open drain reset output with optional internal
pull-up resistor. Output reset pulse width is optional as follows:
Neither fixed nor minimum output reset pulse duration (releasing the push-button while
reset output is active, causes the output to deassert);
Fixed, factory-programmed output reset pulse duration for t
REC
independent on Smart
Reset™ input state.
If V
CC
drops below 1.575 V, the RST output is deasserted and its state is guaranteed down
to 1 V (see Figure 8).
