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USA555 - PRECISION TIMERS

Description

The UTC USA555 monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation.

In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network.

Features

  • S.
  • Astable or monostable operation.
  • Low turn off time.
  • Operates in both astable and monostable modes.
  • Timing from microseconds to hours.
  • Adjustable duty cycle.
  • TTL-compatible output can sink or source up to 200mA.

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Full PDF Text Transcription

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UNISONIC TECHNOLOGIES CO., LTD USA555 LINEAR INTEGRATED CIRCUIT PRECISION TIMERS  DESCRIPTION The UTC USA555 monolithic timing circuit is a highly stable controller capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed 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 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 terminal. When the trigger input falls below the trigger level, the flip-flop is set, and the output goes high.
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