imp813 ETC-unknow, imp813 Datasheet - Page 6

• Manufacturer Part Number: imp813
• Description: Low-power Supervisor Circuits
• Manufacturer: ETC-unknow

Ensuring That RESET is Valid Down to V
When V
longer pulls down; it becomes indeterminate. To avoid the possi-
bility that stray charges build up and force RESET to the wrong
state, a pull-down resistor should be connected to the RESET pin,
thus draining such charges to ground and holding RESET
low. The resistor value is not critical. A 100kΩ resistor will pull
RESET to ground without loading it.
6
Figure 3. Ensuring That RESET is Valid Down to V
Application Information
CC
falls below 1.1V, the IMP705-708 RESET output no
IMP70x
GND
V
CC
V
RESET
CC
< 1.1V
100k
705_06.eps
9
CC
408-432-9100/www.impweb.com
= 0V
CC
= 0V
Bi-directional Reset Pin Interfacing
The IMP705/6/7/8 can interface with µP/µC bi-directional reset
pins by connecting a 4.7kΩ resistor in series with the RESET
output and the µP/µC bi-directional RESET pin.
Supply
Power
Figure 3. Bi-directional Reset Pin Interfacing
IMP70x
GND
V
CC
RESET
IMP705/6/7/8, 8
IMP705/6/7/8, 8
4.7kΩ
Bi-directional I/O Pin
(Example: 68HC11)
RESET
Input
BUF
µC or µP
GND
©
1999 IMP, Inc.
1
1
Buffered
RESET
3L
3L
705_08.eps