STM6821SWY6F STMicroelectronics, STM6821SWY6F Datasheet - Page 12

• Manufacturer Part Number: STM6821SWY6F
• Description: IC SUPERVISOR PB 2.93V SOT23-5
• Manufacturer: STMicroelectronics
• Type: Simple Reset/Power-On Resetr

Specifications of STM6821SWY6F

• Number Of Voltages Monitored: 1
• Output: Push-Pull, Totem Pole
• Reset: Active High
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 2.93V
• 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: 2.89 V
• Overvoltage Threshold: 2.96 V
• Power-up Reset Delay (typ): 280 ms
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-4800-2

Operation
2.6
12/29
Figure 12. Ensuring RST valid to V
Figure 13. Ensuring RST valid to V
1. This configuration does not work on open drain outputs of the STM6321/6322/6822.
Interfacing to microprocessors with bidirectional reset pins
Microprocessors with bidirectional reset pins can contend with the STM6321 / 6322 / 6821 /
6822 / 6823 / 6824 / 6825 reset output. For example, if the reset output is driven high and the
microprocessor wants to pull it low, signal contention will result. To prevent this from
occurring, connect a 4.7 kΩ resistor between the reset output and the microprocessor’s
reset I/O as in
Figure 14. Interfacing to microprocessors with bidirectional reset I/O
Figure
14.
Doc ID 11110 Rev 10
GND
GND
STM6XXX
STM6XXX
CC
CC
= 0, (active-low push-pull outputs)
= 0, (active-high, push-pull outputs)
STM6321/6322STM6821/6822/6823/6824/6825
V
RST
V
RST
CC
CC
V
V
CC
CC
R1
R1
AI09138
AI09139