SA555DR Part Information

Details for SA555DR by Texas Instruments

Semiconductors - ICs>Clock Timing & Frequency Management>Timers Oscillators & Pulse Generators

Part Description

These devices 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 twothirds 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 threshold level, the flipflop 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.

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Part Features

  • Adjustable Duty Cycle
  • Astable or Monostable Operation
  • On Products Compliant to MIL-PRF-38535,
  • TTL-Compatible Output Can Sink or Source Up to 200 mA
  • Timing From Microseconds to Hours

Part Specifications

Frequency 100kHz
Supply Voltage Min 4.5V
Supply Voltage Max 16V
Digital IC Case SOIC
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
No. of Timers 1
RoHS Compliant

Alternative Part Descriptions

  • Precision timer for -55 to 85C operation | Texas Instruments
  • Timer IC [Texas Instruments] SA555DR Timer IC | Distrelec

Frequently Asked Questions

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Additional datasheets, footprints and schematics for SA555DR are listed in our Part Details tab. You can also find the SA555DR image and similar parts on this details page.

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What category does SA555DR fall under?

The SA555DR is listed under Semiconductors - ICs > Clock Timing & Frequency Management > Timers Oscillators & Pulse Generators.

Can I view similar or alternative parts?

You can view similar parts to SA555DR when available in the Timers Oscillators & Pulse Generators range under the specifications section at the bottom of the details page.

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Is the SA555DR RoHS compliant?

Yes. This part has been flagged as RoHS Compliant by Farnell.

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Authorised distributors including Texas Instruments and Distrelec have stock available or on a lead time for SA555DR.

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