Timmer 555
Páginas: 3 (656 palabras)
Publicado: 28 de mayo de 2011
NTE955M NTE955S NTE955SM Integrated Circuit Timing Circuit
Description: The NTE955 series timing circuit is a highly stable controller capable of producing accurate time delays, or oscillation.Additional terminals are provided for triggering or resetting if desired. In time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation asan oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms,and the output structure can source or sink up to 200mA or drive TTL circuits. Features: D Direct Replacement for 555 Timers D Timing from Microseconds through Hours D Operates in Both Astable andMonostable Modes D Adjustable Duty Cycle D High Current Output Can Source or Sink 200mA D Output and Supply TTL Compatible TTL D Temperature Stability of 0.005% per °C D Normally “ON” or Normally “OFF”Output D Available in Three Types: NTE955M – 8–Lead DIP NTE955S – 8–Lead SIP NTE955SM – SOIC–8 (Surface Mount) Applications: D Precision Timing D Pulse Generation D Sequential Timing D Time DelayGeneration D Pulse Width Modulation D Pulse Position Modulation D Linear Ramp Generator
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Power Supply Voltage. VCC . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Discharge Current (Pin7), I7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 200mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate Above25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . ....
Description: The NTE955 series timing circuit is a highly stable controller capable of producing accurate time delays, or oscillation.Additional terminals are provided for triggering or resetting if desired. In time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For astable operation asan oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms,and the output structure can source or sink up to 200mA or drive TTL circuits. Features: D Direct Replacement for 555 Timers D Timing from Microseconds through Hours D Operates in Both Astable andMonostable Modes D Adjustable Duty Cycle D High Current Output Can Source or Sink 200mA D Output and Supply TTL Compatible TTL D Temperature Stability of 0.005% per °C D Normally “ON” or Normally “OFF”Output D Available in Three Types: NTE955M – 8–Lead DIP NTE955S – 8–Lead SIP NTE955SM – SOIC–8 (Surface Mount) Applications: D Precision Timing D Pulse Generation D Sequential Timing D Time DelayGeneration D Pulse Width Modulation D Pulse Position Modulation D Linear Ramp Generator
Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Power Supply Voltage. VCC . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18V Discharge Current (Pin7), I7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 200mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625mW Derate Above25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mW/°C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . ....
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