Datasheet4U Logo Datasheet4U.com

TCM1520A Datasheet Ring Detector

Manufacturer: Texas Instruments

📥 Download Datasheet

General Description

The TCM1520A is a monolithic ring-detection integrated circuit designed for use in isolated or nonisolated telephone applications.

The device uses a modified form of the Texas Instruments BIDFET† technology to combine low-voltage CMOS and high-voltage bipolar input/output circuitry.

It

Overview

ą TCM1520A RING DETECTOR ą SCTS005B − OCTOBER 1984 − REVISED DECEMBER 1990 • On-Chip 150-V Bridge Diode Configuration • Reliable BIDFET† Technology • High Standby Impedance .

.

.

Key Features

  • efficient high-voltage (40 V to 150 V) operation with a typical current drain of 1 mA. Phone Line AC Ring Signal TCM1520A Electronic Telephone or Accessory TTL /NMOS/CMOS Microprocessor During standby, the input impedance is approximately 1 MΩ or greater, which prevents any interference with parallel off-hook telephones transmitting DTMF or voice frequencies. The device achieves this high input impedance with an on-chip series zener diode that does not conduct until the voltage across AC INPUT.

More Datasheets from Texas Instruments

Part Number Description
TCM1501B Telephone Tone Ringer Drivers
TCM1506B Telephone Tone Ringer Drivers
TCM1512B Telephone Tone Ringer Drivers
TCM1531 Telephone Tone Ringer Drivers
TCM1532 Telephone Tone Ringer Drivers
TCM1536 Telephone Tone Ringer Drivers
TCM1539 Telephone Tone Ringer Drivers
TCM1030 DUAL TRANSIENT-VOLTAGE SUPPRESSORS
TCM1050 DUAL TRANSIENT-VOLTAGE SUPPRESSORS
TCM1060 DUAL TRANSIENT-VOLTAGE SUPPRESSORS