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: two oscillators output amplifier power supply control circuit features: designed for telephone bell replacement low current drain small size 8?lead minidip package adjustable 2?frequency tone adjustable warbling rate built?in hysteresis prevents false triggering and rotary dial ?chirps? extension tone ringer modules alarms or other altering devices external triggering or ringer disable (nte1648) 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
electrical characteristics: (t a = +25 c, all voltage referenced to gnd unless otherwise specified) parameter symbol test conditions min typ max unit operating supply voltage v cc ? ? 29 v initiation supply voltage v si note 1 17 19 21 v initiation supply current i si NTE1649 ? 6.8k ? pin2 to gnd, note 1 1.4 2.5 4.2 ma sustaining voltage v sus note 2 9.7 11.0 12.0 v sustaining current i sus no load, v cc = v sus , note 2 0.7 1.4 2.5 ma trigger voltage v tr nte1648 only, v cc = 15v, note 3 9.0 10.5 12.0 v trigger current i tr nte1648 only, note 3 ? 20.0 1000 note 5 a disable voltage v dis nte1648 only, note 4 ? ? 0.5 v disable current i dis nte1648 only, note 4 ? 40 ? 50 ? a output voltage high v oh v cc = 21v, i 8 = ? 15ma, pin6 = 6v, pin7 = gnd 17 19 21 v output voltage low v ol v cc = 21v, i 8 = 15ma, pin6 = 6v, pin7 = gnd ? ? 1.6 v sink current i in (pin3) pin3 = 6v, pin4 = gnd ? ? 500 na i in (pin7) pin7 = 6v, pin6 = gnd ? ? 500 na high frequency f h1 r 3 = 191k, c 3 = 6800pf 461 512 563 h z f h2 r 3 = 191k, c 3 = 6800pf 576 640 704 h z low frequency f l r 2 = 165k, c 2 = 0.47 f 9 10 11 h z note 1. initiation supply voltage (v si ) is the supply voltage required to start the tone ringer oscillating. note 2. sustaining voltage (v sus ) is the supply voltage required to maintain oscillation. note 3. v tr and i tr are the conditions applied to trigger in to start oscillation for v sus v cc v si . note 4. v dis and i dis are the conditions applied to trigger in to inhibit oscillation for v si v cc . note 5. trigger current must be limited to this value externally. pin connection diagram (nte1648) high freq osc amp power supply with hysteresis low freq osc output input trigger input note: c1, c2, r1, and r2 are external parts r1 r2 c1 c2 1 2 3 4 5 6 7 8
high freq osc amp power supply with hysteresis low freq osc output input note: c1, c2, r1, r2 and r3 are external parts r1 r2 c1 c2 1 3 4 5 6 7 8 pin connection diagram (NTE1649) regulated initiation current 2 r3 85 .256 (6.52) max .393 (10.0) max 14 .300 (7.62) .300 (7.62) .150 (3.81) .070 (1.77) min .100 (2.54)
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