STM6822LWY6F STMicroelectronics, STM6822LWY6F Datasheet - Page 10

• Manufacturer Part Number: STM6822LWY6F
• Description: IC SUPERVISOR PB RESET SOT23-5
• Manufacturer: STMicroelectronics
• Type: Simple Reset/Power-On Resetr

Specifications of STM6822LWY6F

• Number Of Voltages Monitored: 1
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 4.63V
• 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: Push-Pull
• Manual Reset: Resettable
• Watchdog: Watchdog
• Battery Backup Switching: No Backup
• Supply Voltage (max): 7 V
• Supply Voltage (min): 0.3 V
• Supply Current (typ): 17 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: 4.561 V
• Overvoltage Threshold: 4.699 V
• Power-up Reset Delay (typ): 280 ms
• Number Of Elements: 1
• Monitored Voltage 1 (typ): 2.5/3/3.3/5V
• Threshold Voltage 1 (max): 4.699V
• Watchdog Timer: Yes
• Chip Enable Signals: No
• Reset Active Time: 280ms
• Package Type: SOT-23
• Operating Supply Voltage (min): 1V
• Operating Supply Voltage (max): 5.5V
• Reset Threshold Voltage (max): 4.699V
• Reset Threshold Voltage (min): 4.561V
• Family Name: STM6822
• Power Dissipation: 320mW
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 5
• Supply Current: 0.017mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4664-2

Operation
2
2.1
2.2
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Operation
Reset output
The STM6xxx supervisor asserts a reset signal to the MCU whenever V
reset threshold (V
(MR) is taken low. Reset is guaranteed valid for V
to 85 °C.
During power-up, once V
the reset timeout period, t
Each time RST is asserted, it stays low for at least the reset timeout period (t
V
V
Open drain RST output
The STM6321/6322/6822 have an active-low, open drain reset output. This output structure
will sink current when RST is asserted. Connect a pull-up resistor from RST to any supply
voltage up to 6 V (see
low, and small enough to register a logic high while supplying all input current and leakage
paths connected to the reset output line. A 10 kΩ pull-up resistor is sufficient in most
applications.
Figure 11. STM6321/6322/6822 open drain RST output with multiple supplies
1. STM6322/6822.
2. STM6321/6822.
3. STM6321/6322.
CC
CC
goes below the reset threshold the internal timer clears. The reset timer starts when
returns above the reset threshold.
RST
), a watchdog timeout occurs, or when the push-button reset input
Figure
CC
rec
exceeds the reset threshold an internal timer keeps reset low for
. After this interval reset is de-asserted.
11). Select a resistor value large enough to register a logic
Doc ID 11110 Rev 10
STM6321/6322STM6821/6822/6823/6824/6825
CC
< V
RST
down to V
CC
CC
=1 V for T
goes below the
rec
). Any time
A
= 0 °C