Thank you for visiting RadioShack. If you need assistance with shopping on our site, please call us at 800-843-7422 and a customer care representative will be happy to assist you. Please inform the Customer Service representative that you require assistance.
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 VCC and GND. The circuits may be triggered and reset on falling waveforms. The output structures
may sink or source 200mA.
Direct replacement for 556 timers
Replaces 2 555 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 3 types: NTE978 14--lead DIP; NTE978C 14--lead DIP (CMOS);
NTE978SM SOIC--14 (surface)
Supply voltage, VCC: +18V
Power dissipation, PD:* 1620mW
Operating temperature range, TA: 0° to +70°C
Storage temperature range, Tstg: --65° to +150°C
Lead temperature (during soldering, 10sec Max), TL: +260°C
Pricing and availability: Please note that all prices are subject to change without prior notice. Prices advertised on this site are for online orders only. Prices on some items may differ from those advertised in RadioShack stores. All merchandise may not be available at all stores, and all stores may not participate in all sales promotions. We recommend you contact the store to confirm product availability and price.
* For operating at elevated temperatures the device must be derated based on a +150°C maximum junction temperature and a thermal resistance of +77°C/W for NTE978 and NTE978C and +110°C/W for NTE978SM.