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| 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 = +25C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30V Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -45 to +65C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Electrical Characteristics: (TA = +25C, 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 fH1 fH2 Low Frequency fL 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 = -15mA, Pin6 = 6V, Pin7 = GND VCC = 21V, I8 = 15mA, Pin6 = 6V, Pin7 = GND Pin3 = 6V, Pin4 = GND Pin7 = 6V, Pin6 = GND R3 = 191k, C3 = 6800pf R3 = 191k, C3 = 6800pf R2 = 165k, C2 = 0.47f Test Conditions Min - 17 1.4 9.7 0.7 9.0 - - -40 17 - - - 461 576 9 Typ - 19 2.5 11.0 1.4 10.5 20.0 - -50 19 - - - 512 640 10 Max 29 21 4.2 12.0 2.5 12.0 1000 Note 5 0.5 - 21 1.6 500 500 563 704 11 Unit V V mA V mA V A V A V V nA nA HZ HZ HZ Note Note Note Note Note 1. 2. 3. 4. 5. Initiation supply voltage (VSI) is the supply voltage required to start the tone ringer oscillating. Sustaining voltage (VSUS) is the supply voltage required to maintain oscillation. VTR and ITR are the conditions applied to trigger in to start oscillation for VSUS VCC VSI. VDIS and IDIS are the conditions applied to trigger in to inhibit oscillation for VSI VCC. Trigger current must be limited to this value externally. Pin Connection Diagram (NTE1648) R1 R2 7 3 Low Freq OSC C1 4 High Freq OSC C2 NOTE: C1, C2, R1, and R2 are external parts Power Supply Input with 5 Hysteresis 1 6 Amp Output 8 2 Trigger Input R1 Pin Connection Diagram (NTE1649) R2 7 3 Low Freq OSC C1 4 High Freq OSC C2 NOTE: C1, C2, R1, R2 and R3 are external parts Power Supply Input with 5 Hysteresis 1 6 Amp Output 8 Regulated Initiation Current R3 2 8 5 .256 (6.52) Max 1 4 .393 (10.0) Max .150 (3.81) .300 (7.62) .100 (2.54) .300 (7.62) .070 (1.77) Min |
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