Lenguaje
Páginas: 3 (702 palabras)
Publicado: 25 de julio de 2012
NA555, NE555, SA555, SE555
www.ti.com
SLFS022H – SEPTEMBER 1973 – REVISED JUNE 2010
PRECISION TIMERS
Check for Samples: NA555, NE555, SA555, SE555
FEATURES
1
•
•
Timing FromMicroseconds to Hours
Astable or Monostable Operation
•
•
Adjustable Duty Cycle
TTL-Compatible Output Can Sink or Source up
to 200 mA
NA555...D OR P PACKAGE
NE555...D, P, PS, OR PW PACKAGESA555...D OR P PACKAGE
SE555...D, JG, OR P PACKAGE
(TOP VIEW)
1
8
2
7
3
6
4
5
VCC
DISCH
THRES
CONT
NC
GND
NC
VCC
NC
NC
TRIG
NC
OUT
NC
4
3 2 1 20 19
185
17
6
16
7
15
14
9 10 11 12 13
8
NC
DISCH
NC
THRES
NC
NC
RESET
NC
CONT
NC
GND
TRIG
OUT
RESET
SE555...FK PACKAGE
(TOP VIEW)
NC – No internalconnection
DESCRIPTION/ORDERING INFORMATION
These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the
time-delay or monostable mode of operation, thetimed interval is controlled by a single external resistor and
capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled
independently with two externalresistors and a single external capacitor.
The threshold and trigger 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, the flip-flop is
set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the
thresholdlevel, the flip-flop is reset and 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....
www.ti.com
SLFS022H – SEPTEMBER 1973 – REVISED JUNE 2010
PRECISION TIMERS
Check for Samples: NA555, NE555, SA555, SE555
FEATURES
1
•
•
Timing FromMicroseconds to Hours
Astable or Monostable Operation
•
•
Adjustable Duty Cycle
TTL-Compatible Output Can Sink or Source up
to 200 mA
NA555...D OR P PACKAGE
NE555...D, P, PS, OR PW PACKAGESA555...D OR P PACKAGE
SE555...D, JG, OR P PACKAGE
(TOP VIEW)
1
8
2
7
3
6
4
5
VCC
DISCH
THRES
CONT
NC
GND
NC
VCC
NC
NC
TRIG
NC
OUT
NC
4
3 2 1 20 19
185
17
6
16
7
15
14
9 10 11 12 13
8
NC
DISCH
NC
THRES
NC
NC
RESET
NC
CONT
NC
GND
TRIG
OUT
RESET
SE555...FK PACKAGE
(TOP VIEW)
NC – No internalconnection
DESCRIPTION/ORDERING INFORMATION
These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the
time-delay or monostable mode of operation, thetimed interval is controlled by a single external resistor and
capacitor network. In the astable mode of operation, the frequency and duty cycle can be controlled
independently with two externalresistors and a single external capacitor.
The threshold and trigger 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, the flip-flop is
set, and the output goes high. If the trigger input is above the trigger level and the threshold input is above the
thresholdlevel, the flip-flop is reset and 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....
Leer documento completo
Regístrate para leer el documento completo.