Ne555 Smd Circuito Integrado (5 Piezas)

Descripción

xx555 Precision Timers
1 Features 3 Description
These devices are precision timing circuits capable of
1• Timing From Microseconds to Hours
producing accurate time delays or oscillation. In the
• Astable or Monostable Operation time-delay or mono-stable mode of operation, the
• Adjustable Duty Cycle timed interval is controlled by a single external
• TTL-Compatible Output Can Sink or Source resistor and capacitor network. In the a-stable mode
Up to 200 mA of operation, the frequency and duty cycle can be
controlled independently with two external resistors
• On Products Compliant to MIL-PRF-38535, and a single external capacitor. All Parameters Are Tested Unless Otherwise
Noted. On All Other Products, Production The threshold and trigger levels normally are twoProcessing Does Not Necessarily thirds and one-third, respectively, of VCC. These Include
levels can be altered by use of the control-voltage Testing of All Parameters. terminal. When the trigger input falls below the trigger
level, the flip-flop is set, and the output goes high. If 2 Applications the trigger input is above the trigger level and the
• Fingerprint Biometrics threshold input is above the threshold level, the flipflop is reset and the output is low. The reset (RESET) • Iris Biometrics
input can override all other inputs and can be used to
• RFID Reader 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

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