NE556

Dual Precision Timer, 18 V, Two Precision Timing Circuits, TTL-Compatible Output

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PartNumber:: NE556

Brand:: Texas Instruments - TI | Pack: DIP | D/C: 10+

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Products Upload time: 2011-08-16

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Part Number:NE556
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Product Summary

The NE556 dual precision timer provides two independent timing circuits in each package. The circuit NE556 can be operated in the astable or the monostable mode with external resistor-capacitor (RC) timing control. The basic timing provided by the RC time constant can be controlled actively by modulating the bias of the control-voltage input. The applications of the NE556 include: (1)Precision Timers From Microseconds to Hours; (2)Pulse-Shaping CIrcuits; (3)Missing-Pulse Detectors; (4)Tone-Burst Generators; (5)Pulse-Width Modulators; (6)Pulse-Position Modulators; (7)Sequential Timers; (8)Pulse Generators; (9)Frequency Dividers; (10)Application Timers; (11)Industrial Controls; (12)Touch-Tone Encoders.

Parametrics

NE556 absolute maximum ratings: (1)Supply voltage, VCC: 18 V; (2)Input voltage (CONT, RESET, THRES, and TRIG): VCC; (3)Output current: ±225 mA; (4)Package thermal impedance, θJA (see Notes 2 and 3): D package: 86℃/W; N package: 80℃/W; NS package: 76℃/W; (5)Package thermal impedance, θJC: J package: 15.05℃/W; (6)Operating virtual junction temperature, TJ: 150℃; (7)Lead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package: 300℃; (8)Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds: D, N, or NS package: 260℃; (9)Storage temperature range, Tstg: –65℃ to 150℃.

Features

NE556 features: (1)Two Precision Timing Circuits Per Package; (2)Astable or Monostable Operation; (3)TTL-Compatible Output Can Sink or Source Up To 150 mA; (4)Active Pullup or Pulldown; (5)Designed to Be Interchangeable With Signetics NE556, SA556, and SE556.