Elec
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Publicado: 25 de febrero de 2013
NE555, SA555, SE555
PRECISION TIMERS
SLFS022C – SEPTEMBER 1973 – REVISED FEBRUARY 2002
D
D
D
D
D
NE555 . . . D, P, PS, OR PW PACKAGE
SA555 . . . D OR P PACKAGE
SE555 . . . D, JG, OR PPACKAGE
(TOP VIEW)
Timing From Microseconds to Hours
Astable or Monostable Operation
Adjustable Duty Cycle
TTL-Compatible Output Can Sink or Source
up to 200 mA
Designed To Be InterchangeableWith
Signetics NE555, SA555, and SE555
GND
TRIG
OUT
RESET
1
2
7
3
6
4
VCC
DISCH
THRES
CONT
8
5
description
SE555 . . . FK PACKAGE
(TOP VIEW)
NC
GND
NC
VCCNC
These devices are precision timing circuits
capable of producing accurate time delays or
oscillation. In the time-delay or monostable mode
of operation, the timed interval is controlled bya
single external resistor and capacitor network. In
the astable mode of operation, the frequency and
duty cycle can be controlled independently with
two external resistors and a single externalcapacitor.
NC
TRIG
NC
OUT
NC
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
NC
DISCH
NC
THRES
NC
NC
RESET
NC
CONT
NC
9 10 11 12 13
The threshold andtrigger levels normally are
two-thirds and one-third, respectively, of VCC.
These levels can be altered by use of the
control-voltage terminal. When the trigger input
falls below the trigger level, theflip-flop is set and
NC – No internal connection
the output goes high. If the trigger input is above
the trigger level and the threshold input is above
the threshold level, the flip-flop is resetand the output is low. The reset (RESET) input can override all other
inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset and the output
goes low.When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.
The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for...
PRECISION TIMERS
SLFS022C – SEPTEMBER 1973 – REVISED FEBRUARY 2002
D
D
D
D
D
NE555 . . . D, P, PS, OR PW PACKAGE
SA555 . . . D OR P PACKAGE
SE555 . . . D, JG, OR PPACKAGE
(TOP VIEW)
Timing From Microseconds to Hours
Astable or Monostable Operation
Adjustable Duty Cycle
TTL-Compatible Output Can Sink or Source
up to 200 mA
Designed To Be InterchangeableWith
Signetics NE555, SA555, and SE555
GND
TRIG
OUT
RESET
1
2
7
3
6
4
VCC
DISCH
THRES
CONT
8
5
description
SE555 . . . FK PACKAGE
(TOP VIEW)
NC
GND
NC
VCCNC
These devices are precision timing circuits
capable of producing accurate time delays or
oscillation. In the time-delay or monostable mode
of operation, the timed interval is controlled bya
single external resistor and capacitor network. In
the astable mode of operation, the frequency and
duty cycle can be controlled independently with
two external resistors and a single externalcapacitor.
NC
TRIG
NC
OUT
NC
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
NC
DISCH
NC
THRES
NC
NC
RESET
NC
CONT
NC
9 10 11 12 13
The threshold andtrigger levels normally are
two-thirds and one-third, respectively, of VCC.
These levels can be altered by use of the
control-voltage terminal. When the trigger input
falls below the trigger level, theflip-flop is set and
NC – No internal connection
the output goes high. If the trigger input is above
the trigger level and the threshold input is above
the threshold level, the flip-flop is resetand the output is low. The reset (RESET) input can override all other
inputs and can be used to initiate a new timing cycle. When RESET goes low, the flip-flop is reset and the output
goes low.When the output is low, a low-impedance path is provided between discharge (DISCH) and ground.
The output circuit is capable of sinking or sourcing current up to 200 mA. Operation is specified for...
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