NTE914 IC Zero-Voltage Switch

Formerly: ECG914

Integrated Circuit Zero−Voltage Switch

Description:
The NTE914 zero−voltage switch is a monolithic silicon integrated circuit in a 14−Lead DIP type package designed to control a thyristor in a variety of AC power switching applications for AC input voltages of 24V, 120V, 208/230V, and 277V at 50/60Hz and 400Hz. The NTE914 incorporates 4 functional blocks as follows:
Limiter−Power Supply: Permits operation directly from an AC line. Differential ON/OFF Sensing Amplifier: Tests the condition of external sensors or command signals. Hysteresis or proportional−control capability may easily be implemented in this section. Zero−Crossing Detector: Synchronizes the output pulses of the circuit at the time when the AC cycle is at zero voltage point; thereby eliminating radio−frequency interference (RFI) when used with resistive loads. TRIAC Gating Circuit: Provides high current pulses to the gate of the power controlling thyristor.
The NTE914 also provides the following important auxiliary functions: A built−in protection circuit that may be actuated to remove drive from the TRIAC if the sensor opens or shorts. Thyristor firing may be inhibited through the acting of an internal diode gate connected to Pin1. High−power DC comparator operation is provided by overriding the action of the zero−crossing detector. This is accomplished by connecting Pin12 to Pin7. Gate current to the thyristor is continuous when Pin13 is positive with respect to Pin9.

Features:
- 24V, 120V, 208/230V, 277V at 50Hz, 60Hz, or 400Hz Operation
- Differential Input
- Low Balance Input Current: 1μA Max
- Built−In Protection Circuit or Opened or Shorted Sensor
- Sensor Range: RX = 2 to 100kΩ
- DC Mode
- External Trigger
- External Inhibit
- DC Supply Voltage: 14V Max

Applications:
- Relay Control
- Valve Control
- Synchronous Switching of Flashing Lights
- ON/OFF Motor Switching
- Differential Comparator with Self−Contained Power Supply for Industrial Applications
- Photosensitive Control
- Power One−Shot Control
- heater Control
- Lamp Control

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)
DC Supply Voltage (Between Pin2 and Pin7).......................................... 14V
DC Supply Voltage (Between Pin2 and Pin8).......................................... 10V
Peak Supply Current (Between Pin5 and Pin7)...................................... ±50mA
Output Pulse Current (Pin4)...................................................... 150mA
Power Dissipation (TA ≤ +55°C), PD...............................................700mW
Derate Linearly Above 55°C............................................ 6.67mW/°C
Operating Ambient Temperature Range, Topr.................................−55° to +125°C
Storage Temperature Range, Tstg.........................................−65° to + 150°C
Lead Temperature (During Soldering 1/16” from case, 10sec max), TL.................+265°C

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Anmerkung zu den NTE/ECG Austauschhalbleiter:
NTE-Austauschhalbleiter (früher ECG Philips und Sylvania) sind sorgfältig ausgesuchte und erprobte Halbleiter, die einen sicheren Ersatz für Originaltypen verschiedenster Hersteller und Ursprünge für fast alle Applikationsbereiche im Wartungsdienst bieten.
Alle NTE-Austausch-Halbleiter sind einzeln in durchsichtigen Plastikbeuteln verpackt, auf welchen die wichtigsten Daten vermerkt sind.