IMP809JEUR-T IMP [IMP, Inc], IMP809JEUR-T Datasheet - Page 5

• Manufacturer Part Number: IMP809JEUR-T
• Description: 3-Pin Microcontroller Power Supply Supervisor
• Manufacturer: IMP [IMP, Inc]

Negative V
The IMP809/810 protect µPs from brownouts and low V
duration transients of 100mV amplitude and 20µs or less duration
typically do not cause a false RESET.
To ensure logic inputs connected to the IMP809 RESET pin are in
a known state when V
Bi-directional Reset Pin Interfacing
The IMP809/810 can interface with µP/µC bi-directional reset
pins by connecting a 4.7kΩ resistor in series with the
IMP809/810 reset output and the µP/µC bi-directional reset pin.
Valid Reset with V
Supply
Power
Figure 2. RESET Valid with V
CC
Transients
CC
CC
under 1.1V
is under 1.1V, a 100kΩ pull-down
Supply
Power
IMP809
V CC
GND
RESET
CC
Under 1.1V
Figure 4. Bi-directional Reset Pin Interfacing
809/10_04.eps
IMP809
100k
GND
V CC
CC
RESET
. Short
resistor at RESET is needed. The value is not critical. A pull-up
resistor to V
4.7k
Bi-directional I/O Pin
(Example: 68HC11)
Supply
Power
Figure 3. RESET Valid with V
CC
is needed with the IMP810.
RESET
Input
BUF
C or P
GND
Application Information
IMP809, IMP8
IMP809, IMP8
IMP810
Buffered
RESET
809/10_06.eps
V CC
GND
RESET
CC
Under 1.1V
809/10_05.eps
100k
1
1
0
0
5