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NE556 Datasheet(PDF) 1 Page - Texas Instruments |
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NE556 Datasheet(HTML) 1 Page - Texas Instruments |
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1 / 5 page  NE556, SA556, SE556 DUAL PRECISION TIMERS SLFS023C – APRIL 1978 – REVISED DECEMBER 1999 1 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 D Two Precision Timing Circuits per Package D Astable or Monostable Operation D TTL-Compatible Output Can Sink or Source Up to 150 mA D Active Pullup or Pulldown D Designed to be Interchangeable With Signetics NE556, SA556, and SE556 D Applications Include: – Precision Timers From Microseconds to Hours – Pulse-Shaping CIrcuits – Missing-Pulse Detectors – Tone-Burst Generators – Pulse-Width Modulators – Pulse-Position Modulators – Sequential Timers – Pulse Generators – Frequency Dividers – Application Timers – Industrial Controls – Touch-Tone Encoders description These devices provide two independent timing circuits of the NE555, SA555, or SE555 type in each package. These circuits 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 threshold (THRES) and trigger (TRIG) levels are normally two-thirds and one-third, respectively, of VCC. These levels can be altered by using the control-voltage (CONT) terminal. When the trigger input falls below 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 the reset input goes low, the flip-flop is reset and the output goes low. When the output is low, a low-impedance path is provided between the discharge (DISCH) terminal and ground (GND). The NE556 is characterized for operation from 0 °C to 70°C. The SA556 is characterized for operation from –40 °C to 85°C, and the SE556 is characterized for operation over the full military range of –55°C to 125°C. AVAILABLE OPTIONS V (MAX) PACKAGED DEVICES TA VT (MAX) V15 V SMALL OUTLINE CERAMIC DIP PLASTIC DIP TA VCC = 15 V SMALL OUTLINE (D) CERAMIC DIP (J) PLASTIC DIP (N) (D) (J) (N) 0 °C to 70°C 11.2 V NE556D – NE556N –40 °C to 85°C 11.2 V SA556D – SA556N –55 °C to 125°C 10.6 V – SE556J – The D package is available taped and reeled. Add the suffix R to the device type (e.g., NE556DR). Copyright © 1999, Texas Instruments Incorporated PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1DISCH 1THRES 1CONT 1RESET 1OUT 1TRIG GND VCC 2DISCH 2THRES 2CONT 2RESET 2OUT 2TRIG NE556, SA556 . . . D, OR N PACKAGE SE556 ...J PACKAGE (TOP VIEW) On products compliant to MIL-PRF-38535, all parameters are tested unless otherwise noted. On all other products, production processing does not necessarily include testing of all parameters. |
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