STM690RM6E STMicroelectronics, STM690RM6E Datasheet - Page 19

• Manufacturer Part Number: STM690RM6E
• Description: IC SUPERVISOR SWITCH OVER 8-SOIC
• Manufacturer: STMicroelectronics
• Type: Simple Reset/Power-On Resetr

Specifications of STM690RM6E

• Number Of Voltages Monitored: 1
• Output: Push-Pull, Totem Pole
• Reset: Active Low
• Reset Timeout: 140 ms Minimum
• Voltage - Threshold: 2.625V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STM690, STM704, STM795, STM802, STM804, STM805, STM806
2.10
2.11
Using a SuperCap™ as a backup power source
SuperCaps™ are capacitors with extremely high capacitance values (e.g., order of 0.47 F)
for their size.
SuperCap may be connected through a diode to the V
V
these supervisors with a Super-Cap.
Figure 14. Using a SuperCap™
Negative-going V
The STM690/704/795/802/804/805/806 supervisors are relatively immune to negative-going
V
starting at V
(comparator overdrive). The graph indicates the maximum pulse width a negative V
transient can have without causing a reset pulse. As the magnitude of the transient
increases (further below the threshold), the maximum allowable pulse width decreases. Any
combination of duration and overdrive which lies under the curve will NOT generate a reset
signal. Typically, a V
or less will not cause a reset pulse. A 0.1 µF bypass capacitor mounted as close as possible
to the V
CC
CC
while V
transients (glitches).
CC
pin provides additional transient immunity.
CC
RST
Figure 14
is above the reset threshold, there are no special precautions when using
+ 0.3 V and ending below the reset threshold by the magnitude indicated
CC
transient that goes 100 mV below the reset threshold and lasts 40 µs
shows how to use a SuperCap as a backup power source. The
Figure 32
CC
Doc ID 10519 Rev 9
transients
5 V
was generated using a negative pulse applied to V
V
V
CC
BAT
STMXXX
GND
V
RST
OUT
CC
supply. Since V
To external SRAM
To µP
BAT
can exceed
Operation
CC
AI08805
CC
19/42
,