FM1233D Fairchild Semiconductor, FM1233D Datasheet - Page 4

• Manufacturer Part Number: FM1233D
• Description: 3-Pin C Supervisor Circuit
• Manufacturer: Fairchild Semiconductor

FM1233D Rev. D
Pin Descriptions
Circuit Timing (Ex: FM1233D)
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
falls below its minimum operating voltage, approx. 1V. At this
point, the supervisor loses control, and its output may rise, only
to again follow V
Pin Number
1
2
3
CC
down to the ground.
CC
CC
drops below V
GND
GND
V
V
starts to fall, RESET will follow it
5V
1V
5V
1V
TH
TH
CC
Name
RESET
GND
V
(for example), RESET will
CC
TH
, RESET drops to
RESET
V
GROUND
RESET remains LOW while V
for at least 140ms after V
CC
CC
also
4
When V
reached, whereupon the device regains control, RESET is
pulled to ground, etc. When V
comes out of RESET 140 ms later.
If it is required that a lower value than GND + 1.0V is needed
on RESET signal during V
on the device output to GND.
Function
CC
140ms
CC
begins to rise, RESET follows it until 1.0V or so is
rises above V
CC
is below V
CC
TH
TH
.
1V, a 100K resistor may be used
, and
CC
rises above V
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TH
, RESET