FM803JP3X FAIRCHILD [Fairchild Semiconductor], FM803JP3X Datasheet - Page 4

• Manufacturer Part Number: FM803JP3X
• Description: 3-Pin ?C Supervisor Device
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FM803 Rev. C.3
Pin Descriptions
Circuit Timing (Ex: FM803)
When operating properly with 5V V
also be about 5V. When V
down as shown. When V
ground (“issues a RESET”) and stays there unless V
below its minimum operating voltage, approx. 1V. At this point, the
supervisor loses control, and its output may rise, only to again
follow V
CC
down to the ground.
CC
CC
Pin Number
drops below V
starts to fall, /RESET will follow it
GND
GND
3.3V
3.3V
V
V
CC
1
2
3
1V
1V
TH
TH
(for example), /RESET will
TH
, /RESET drops to
/RESET
Name
GND
V
CC
CC
also falls
RESET
GROUND
/RESET remains LOW while V
V
above V
V
TH
CC
4
, and for at least 140ms after V
When V
reached, whereupon the device regains control, /RESET is pulled
to ground, etc. When V
RESET 140 ms later.
If it is required that a lower value than GND + 1.0V is needed on
RESET signal during V
the device output to GND.
TH
.
CC
Function
begins to rise, /RESET follows it until 1.0V or so is
CC
CC
140ms
(min)
CC
rises above V
≤ 1V, a 100K resistor may be used on
is below
CC
rises
TH
, /RESET comes out of
www.fairchildsemi.com
www.fairchildsemi.com