NTE978/NTE978C/NTE978SM
Integrated Circuit
Dual Timer
Description:
The NTE978 series dual timing circuit is a highly stable controller capable of producing accurate time
delays or oscillation. The NTE978 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
V
CC
and GND. The circuits may be triggered and reset on falling waveforms. The output structures
may sink or source 200mA.
Features:
D
Direct Replacement for 556 Timers
D
Replaces Two 555 Timers
D
Timing from Microseconds through Hours
D
Operates in both Astable and Monostable Modes
D
Adjustable Duty Cycle
D
Output can Source or Sink 200mA
D
Output and Supply TTL Compatible
D
Temperature Stability better than 0.005% per
擄C
D
Normally On and Normally Off Output
D
Available in Three Types:
NTE978
14鈥揕ead DIP
NTE978C
14鈥揕ead DIP (CMOS)
NTE978SM SOIC鈥?4 (Surface Mount)
Applications:
D
Precision Timing
D
Pulse Generation
D
Sequential Timing
D
Time Delay Generation
D
Pulse Width Modulation
D
Pulse Position Modulation
D
Linear Ramp Generator
Absolute Maximum Ratings:
Supply Voltage, V
CC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +18V
Power Dissipation (Note 1), P
D
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1620mW
Operating Temperature Range, T
A
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0擄 to +70擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Lead Temperature (During Soldering, 10sec Max), T
L
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +260擄C
Note 1. For operating at elevated temperaturesthe device must be derated based on a +150擄C maxi-
mum junction temperature and a thermal resistance of +77擄C/W for NTE978 and NTE978C
and +110擄C/W for NTE978SM.
1
2
3
