NTE978SM

Features:

Direct Replacement for 556 Timers
Replaces Two 555 Timers
Timing from Microseconds through Hours
Operates in both Astable and Monostable Modes
 Adjustable Duty Cycle
  Output can Source or Sink 200mA
  Output and Supply TTL Compatible
  Temperature Stability better than 0.005% per °C
  Normally On and Normally Off Output
  Available in Three Types:
         NTE978 14Lead DIP
         NTE978C 14Lead DIP (CMOS)
         NTE978SM SOIC14 (Surface Mount)


Application

 Precision Timing
Pulse Generation
Sequential Timing
Time Delay Generation
Pulse Width Modulation
Pulse Position Modulation
Linear Ramp Generator


Pinout




Specifications

Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18V
Power Dissipation (Note 1), P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1620mW
Operating Temperature Range, T_A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0° to +70°C
Storage Temperature Range, T_stg  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  . . 65° to +150°C
Lead Temperature (During Soldering, 10sec Max), T_L . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .  +260°C


Description

The NTE978SM series dual timing circuit is a highly stable controller capable of producing accurate time delays or oscillation.  The NTE978SM is a dual NTE955.  Timing is provided by an external resistor and capacitor for each timing function.  The two timers operate independently of each other sharing only VCC and GND.  The NTE978SM may be triggered and reset on falling waveforms.  The output structures may sink or source 200mA.