NTE1578 integrated circuit fm mixer/if amp description: the NTE1578 is an fm front?end integrated circuit in a 16?lead dip type package designed for use in car radio and home stereo applications. this device has a built?in agc driver circuit which im- proves interference characteristics. it thereby offers advantages such as improved interference char- acteristics without sacrificing usable sensitivity and the conventional dx?local change?over switch. features: double?balanced type mix (improved spurious characteristic) keyed agc/keyed classical agc (improved intermodulation, cross modulation characteristic) differential if amplification (improved limiting characteristic) absolute maximum ratings: (t a = +25 c unless otherwise specified) maximum supply voltage (pin12, pin15), v cc1 max 8.5v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . maximum supply voltage (pin5, pin6), v cc2 max 16v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . allowable power dissipation (t a +50 c, note 1), p d max 600mw . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating temperature range, t opg ?20 to +70 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ?40 to +125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . note 1. p d max = 460mw at t a = +70 c recommended operation condition: (t a = +25 c unless otherwise specified) recommended supply voltage (pin12, pin15), v cc1 8v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . recommended supply voltage (pin5, pin6), v cc2 13v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electrical characteristics: (t a = +25 c, v cc1 = 8v, v cc2 = 13v unless otherwise specified) parameter symbol test conditions min typ max unit dissipation current i cc1 pin 12, 15 17 25 36 ma i cc2 pin 5, 6 5 8 11 ma local osc input offset ? v inosc ?20 0 20 mv mix input offset ? v inmix ?20 0 20 mv mix output offset ? i out mix ?600 0 600 a high level agc output v agc h v i = 0dbu, v cl = 4v 7.6 7.9 ? v low level agc output v agc l v i = 100db, v cl = 4v ? 0.5 1 v
electrical characteristics (cont?d): (t a = +25 c, v cc1 = 8v, v cc2 = 13v unless otherwise specified) parameter symbol test conditions min typ max unit agc control input v cl 7 v i = 100dbu, v agc = 7v ? 0.35 0.6 v v cl 2 v i = 100dbu, v agc = 2v 1.2 1.7 2.2 v if input resistance r in 230 330 430 ohm voltage gain vg v i = 62dbu 80 85 90 db input limiting voltage v i lim v agc = 2v 62 71 80 db agc input voltage v i agc v agc = 2v 62 71 80 db saturation output voltage v out v i = 100db 91 95 ? db v cc v cc rf input gnd if decoupling if input osc input rf input agc output osc input gnd mixer output mixer output agc inhibit if output agc input 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 pin connection diagram .260 (6.6) max 16 9 18 .785 (19.9) max .200 (5.08) max .245 (6.22) min .300 (7.62) .700 (17.7) .100 (2.54)
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