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NTE1648

Integrated Circuit Telephone Tone Ringer

NTE Electronics 

NTE1648 and NTE1649

Integrated Circuit

Telephone Tone Ringer

Description:

The NTE1648 and NTE1649 are bipolar integrated circuits in an 8–Lead DIP type package designed

for telephone bell replacement.

Functions:

D Two Oscillators

D Output Amplifier

D Power Supply Control Circuit

Features:

D Designed for Telephone Bell Replacement

D Low Current Drain

D Small Size 8–Lead MINIDIP Package

D Adjustable 2–Frequency Tone

D Adjustable Warbling Rate

D Built–in Hysteresis Prevents False Triggering and Rotary Dial “CHIRPS”

D Extension Tone Ringer Modules

D Alarms or Other Altering Devices

D External Triggering or Ringer Disable (NTE1648)

D Adjustable for Reduced Supply Initiation Current (NTE1649)

Absolute Maximum Ratings: (TA = +25°C unless otherwise specified)

Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V

Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW

Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –45° to +65°C

Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C

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