NTE1648 Datasheet, PDF (1/3 Pages) NTE Electronics – Integrated Circuit Telephone Tone Ringer

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: (T_A = +25°C unless otherwise specified)
Supply Voltage, V_CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V
Power Dissipation, P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW
Operating Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –45° to +65°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65° to +150°C