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HT19 - Electronic Telephone Line Switch

Download the HT19 datasheet PDF. This datasheet also covers the HT19LG variant, as both devices belong to the same electronic telephone line switch family and are provided as variant models within a single manufacturer datasheet.

General Description

The Supertex HT19LG is an electronic line switch circuit that replaces the mechanical hook switch contact or a discrete hook switch in a telephone handset or modem.

It switches the positive side of the telephone line using control inputs that are referenced to the negative side of the line.

Key Features

  • 350V breakdown voltage.
  • 18Ω maximum switch resistance.
  • Current limiting protection.
  • Operates at 2.3V input.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (HT19LG_SupertexInc.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number HT19
Manufacturer Supertex
File Size 434.14 KB
Description Electronic Telephone Line Switch
Datasheet download datasheet HT19 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Supertex inc. HT19 Electronic Telephone Line Switch Features ►►350V breakdown voltage ►►18Ω maximum switch resistance ►►Current limiting protection ►►Operates at 2.3V input Applications ►►Telephone handsets ►►Modems ►►Fax machines ►►Answering machines ►►Remote meter reading ►►Telephone interface products General Description The Supertex HT19LG is an electronic line switch circuit that replaces the mechanical hook switch contact or a discrete hook switch in a telephone handset or modem. It switches the positive side of the telephone line using control inputs that are referenced to the negative side of the line. In its off state, it can withstand 350V on the positive input. In its on state, it has a maximum series resistance of 18Ω.