NA555, NE555, SA555, SE555 are precision timing circuits capable of producing accurate time delays or oscillation.
In the time-delay or mono-stable mode of operation, the timed interval is controlled by a single external resistor and
capacitor network. In the a-stable mode of operation, the frequency and duty cycle can be controlled independently with
two external resistors 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 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 threshold level, 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. Operation is specified for supplies of 5 V to 15 V.
With a 5-V supply, output levels are compatible with TTL inputs.
|Voltage – Supply||4.5 V ~ 16 V|
|Operating Temperature||0°C ~ 70°C|
|Package / Case||8-PDIP|