Datasheet4U Logo Datasheet4U.com

NTE1690 - Integrated Circuit Telephone DTMF Dialer

Description

The NTE1690 is a low threshold voltage, field implanted, metal gate CMOS integrated circuit in a 16

Lead DIP type package.

frequency pairs required in tone dialing systems.

Features

  • D 3V to 10V Operation When Generating Tones D 2V Operation of Keyscan and MUTE Logic D Static Sensing of Key Closures or Logic Inputs D On.
  • Chip 3.579545MHz Crystal.
  • Controlled Oscillator D Output Amplitudes Proportional to Supply Voltage D High Group Pre.
  • Emphasis D Low Harmonic Distortion D Open Emitter.
  • Follower Low.
  • Impedance Output D SINGLE TONE.

📥 Download Datasheet

Datasheet Details

Part number NTE1690
Manufacturer NTE
File Size 31.70 KB
Description Integrated Circuit Telephone DTMF Dialer
Datasheet download datasheet NTE1690 Datasheet

📁 Similar Datasheet

  • NTE1661 - Integrated Circuit Synchronization Signal Processor (NTE Electronics)
  • NTE1671 - 42-Lead DIP / Video Chroma Demod (ETC)
  • NTE1012 - Integrated Circuit Module - Hybrid (NTE Electronics)
  • NTE1026 - Integrated Circuit Module (NTE Electronics)
  • NTE1039 - Integrated Circuit FM IF Amplifier (NTE Electronics)
  • NTE1052 - Integrated Circuit Low Noise Preamp (NTE Electronics)
  • NTE1053 - Integrated Circuit AF High Gain Preamplifier (NTE Electronics)
  • NTE1056 - Integrated Circuit FM Stereo Multiplex Demodulator (NTE Electronics)
  • NTE1057 - Integrated Circuit FM IF Amplifier (NTE Electronics)
  • NTE1058 - Integrated Circuit Audio Power Amp (NTE Electronics)
Other Datasheets by NTE
  • NTE169 - Single Phase Bridge Rectifier
  • NTE1691 - Integrated Circuit Telephone Pulse Dialer
  • NTE1692 - Integrated Circuit Telephone Pulse Dialer
  • NTE1693 - Integrated Circuit Telephone Pulse Dialer
  • NTE16 - Silicon Complementary Transistors Low Noise / General Purpose Amplifier
  • NTE160 - Germanium PNP Transistor RF-IF Amp / FM Mixer OSC
  • NTE16000-ECG - Polymeric Positive Temperature Coefficient (PTC)
  • NTE16001 - Silicon NPN Transistor Video IF Amp

Full PDF Text Transcription

Click to expand full text
NTE1690 Integrated Circuit Telephone DTMF Dialer Description: The NTE1690 is a low threshold voltage, field–implanted, metal gate CMOS integrated circuit in a 16–Lead DIP type package. This device interfaces directly to a standard telephone keypad and generates all dual tone multi–frequency pairs required in tone dialing systems. The tone synthesizers are locked to an on–chip reference oscillator using an inexpensive 3.579545MHz crystal for high tone accuracy. The crystal and an output load resistor are the only external components required for tone generation. A MUTE OUT logic signal, which changes state when any key is depressed is also provided.
Published: |