NTE1648 Datasheet | NTE Electronics

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 - - - - - - - - - - - . . . 400m W Operating Temperature Range, Topr - - - - - - - - . - 45° to +65°C Storage Temperature Range, Tstg - - - - - - - - . . - 65° to +150°C Electrical Characteristics: (TA = +25°C, All voltage referenced to GND unless otherwise specified) Parameter Operating Supply Voltage Initiation Supply Voltage Initiation Supply Current Sustaining Voltage Sustaining Current Trigger Voltage Trigger Current Disable Voltage Disable Current Output Voltage High Output Voltage Low Sink Current Symbol VCC VSI ISI VSUS ISUS VTR ITR VDIS IDIS VOH VOL IIN (Pin3) IIN (Pin7) High Frequency f H1 f H2 Low Frequency f L Note 1 NTE1649- 6.8k- Pin2 to GND, Note 1 Note 2 No Load, VCC = VSUS, Note 2 NTE1648 ONLY, VCC = 15V, Note 3 NTE1648 ONLY, Note 3 NTE1648 ONLY, Note 4 NTE1648 ONLY, Note 4 VCC = 21V, I8 = - 15m A, Pin6 = 6V, Pin7 = GND VCC = 21V, I8 = 15m A, Pin6 = 6V, Pin7 = GND Pin3 = 6V, Pin4 = GND...