STM6821TWY6F STMicroelectronics, STM6821TWY6F Datasheet - Page 7

• Manufacturer Part Number: STM6821TWY6F
• Description: SUPERVISOR 3.080V PP SOT23-5
• Manufacturer: STMicroelectronics
• Type: Simple Reset/Power-On Resetr

Specifications of STM6821TWY6F

• Number Of Voltages Monitored: 1
• Output: Push-Pull, Totem Pole
• Reset: Active High
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 3.08V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Monitored Voltage: 2.5 V, 3 V, 3.3 V, 5 V
• Output Type: Active High, Push-Pull
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: No Backup
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1 V
• Supply Current (typ): 12 uA
• Maximum Power Dissipation: 320 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Power Fail Detection: No
• Undervoltage Threshold: 3.04 V
• Overvoltage Threshold: 3.11 V
• Power-up Reset Delay (typ): 280 ms
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4976-2

STM6321/6322STM6821/6822/6823/6824/6825
1.1
1.1.1
1.1.2
1.1.3
1.1.4
1.1.5
Pin descriptions
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.
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.
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.
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, push-pull reset output; inverse of RST.
Table 3.
Active-low, push-pull reset output (RST) - 6823/6824/6825
Active-low, open drain reset output (RST) - STM6321/6322/6822
Push-button reset input (MR)
Watchdog input (WDI)
Active-high reset output (RST)
STM6822
STM6823
—
1
3
4
5
2
rec
after MR returns high. This active-low input has an internal 52 kΩ pull-up. It can
Pin functions
STM6821
—
3
4
1
5
2
Pin
STM6321
STM6824
—
1
4
3
5
2
Doc ID 11110 Rev 10
STM6322
STM6825
—
1
4
3
5
2
rec
rec
after either V
after either V
Name
RST
RST
WDI
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
Description
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