STM6719SFWB6R STMicroelectronics, STM6719SFWB6R Datasheet - Page 10

• Manufacturer Part Number: STM6719SFWB6R
• Description: IC SUPERVISOR OPEN DRN SOT-23-6
• Manufacturer: STMicroelectronics
• Type: Multi-Voltage Supervisorr

Specifications of STM6719SFWB6R

• Number Of Voltages Monitored: 3
• Output: Open Drain or Open Collector
• Reset: Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 1.05V, 2.925V, Adj
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: *
• Package / Case: *
• Manual Reset: Resettable
• Power-up Reset Delay (typ): 13.2 ms
• Supply Voltage (max): + 7 V
• Supply Voltage (min): - 0.3 V
• Supply Current (typ): 12 uA
• Maximum Power Dissipation: 675 mW
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-11143-2

Operation
2
2.1
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Operation
Applications information
1.
2.
Figure 11. STM67xx interface to processor with bi-directional reset pins
Figure 12. Ensuring RST valid to V
Interfacing to processors with bi-directional reset pins
Most processors with bi-directional reset pins can interface directly to the open drain
RST outputs (STM6717/19/77/79). Systems simultaneously requiring a push-pull RST
output and a bi-directional reset interface can be in logic contention. To prevent this
contention, connect a 4.7 kΩ resistor between RST and the processor’s reset I/O as
shown in
Ensuring a valid RST output down to V
The STM67xx supervisors are guaranteed to be in the correct RST output logic state
when V
levels down to V
Figure
sink or source current. This scheme does NOT work with the open drain outputs of the
STM6717/19/77/79.
The resistor value used is not critical, but it must be large enough not to load the reset
output when V
adequate.
12) will ensure that the reset line is valid while the reset output can no longer
CC1
Figure
V CC2
and/or V
CC
CC
11.
V CC1
is above the reset threshold. For most applications, 100 kΩ is
= 0, a pull-down resistor to active-low outputs (push-pull only, see
CC2
is greater than 0.8 V. In applications which require valid reset
V CC1
V CC2
Doc ID 11469 Rev 7
STM67xx
V SS
STM6717/6718/6719/6720/STM6777/6778/6779/6780
CC
RST
V SS
= 0 (active-low, push-pull outputs)
STM67xx
components
CC
To other
system
= 0 V
V CC1
4.7kΩ
RST
V CC1
RESET
Processor
R1
V SS
AI10425
AI10426