stm6823sjwy6f STMicroelectronics, stm6823sjwy6f Datasheet - Page 7

• Manufacturer Part Number: stm6823sjwy6f
• Description: 5-pin Supervisor With Watchdog Timer And Push-button Reset
• Manufacturer: STMicroelectronics

1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
Pin descriptions
Active-low, push-pull reset output (RST) - STM6822/6823/6824/6825
Pulses low when triggered, and stays low whenever V
when MR is a logic low. It remains low for t
threshold, the watchdog triggers a reset, or MR goes from low to high.
Active-low, open drain reset output (RST) - STM6321/6322/6822
Pulses low when triggered, and stays low whenever V
when MR is a logic low. It remains low for t
threshold, the watchdog triggers a reset, or MR goes from low to high. Connect a pull-up
resistor to supply voltage.
Push-button reset input (MR)
A logic low on MR asserts the reset output. Reset remains asserted as long as MR is low
and for t
be driven from a TTL or CMOS logic line, or shorted to ground with a switch. Leave open if
unused.
Watchdog input (WDI)
If WDI remains high or low for at least 1.6s, the internal watchdog timer expires and reset is
asserted. The internal watchdog timer clears while reset is asserted or when WDI sees a
rising or falling edge. The watchdog function CAN be disabled if WDI is left unconnected or
is connected to a tri-state buffer output.
Active-high reset output (RST)
Active-high, push-pull reset output; inverse of RST.
Table 3.
STM6822
STM6823
—
1
3
4
5
2
rec
after MR returns high. This active-low input has an internal 52kΩ pull-up. It can
Pin functions
STM6821
—
3
4
1
5
2
Pin
STM6321
STM6824
—
1
4
3
5
2
STM6322
STM6825
—
1
4
3
5
2
rec
rec
after either V
after either V
Name
RST
WDI
RST
V
V
MR
CC
SS
CC
CC
is below the reset threshold or
is below the reset threshold or
CC
CC
Active-Low Reset Output
Push-button Reset Input
Watchdog Input
Active-High Reset Output
Supply Voltage
Ground
rises above the reset
rises above the reset
Function
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