NTE1522 integrated circuit b/w video if description: the NTE1522 is a silicon monolithic integrated circuit designed for vif section in b/w television re- ceivers. this ic has all functions including a video if amplifier, video low ? loevel detector, rf agc, if agc and noise canceller. the ic is a 14 pin dual in ? line package with a heat tab. features: high input sensitivity: 30db (typ.) it can be used both of keyed type agc and peak type agc. it can be operated with the power supply voltage above 7v. since the video detector has a wide bandwidth, it?s suitable for the sound carrier frequency of 4.5, 5.5, 6.0 and 6.5mhz as input is in differential mode, it can be used with saw filter. absolute maximum ratings: (t a = +25 c unless otherwise specified) supply voltage, v 7 15v . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . input signal voltage, v 8 , v 9 3v p ? p . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . power dissipation (note 1), p d 875mw . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . operating temperature range, t opr ? 20 to +75 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . storage temperature range, t stg ? 40 to +125 c . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . note 1. t a = +75 c free air electrical characteristics: (t a = +25 c, v cc = 12v, f = 58.75mhz, f m = 15.75khz unless otherwise specified) parameter symbol test conditions min typ max unit total supply current i cc i 7 + i 12 , ra = 150 40 50 60 ma input sensitivity i(sens) mod = 80%, v o = 1.4v p ? p ? 30 35 db max. input voltage i(max) mod = 80%, ? 1db point 100 ? ? db video output voltage o mod = 80%, v i = 3 m v rms 1.0 1.4 1.7 v p ? p video output dc voltage v o no signal 3.3 3.8 4.3 v signal to noise ratio s/n mod = 80% to 0%, i = 3 m v rms 40 50 ? db rf agc voltage (high) v 6h v 5 = 0v 8 9 11 v rf agc voltage (low) v 6l v 5 = 7v ? 0 0.5 v differential gain dg stair step f m = 3.58mhz ? ? 10 % differential phase dp ? ? 10 deg. video detector bandwidth bw ? 3db point 5.5 ? ? mhz input resistance r in ? 1.5 ? k input capacitance c in ? 3.3 ? pf
pin connection diagram v cc 2 v cc 1 detector coil vif input gnd agc time constant detention coil video output keying pulse input capacitor 1 2 3 4 5 rf agc adjust 6 toner agc output 7 14 13 12 11 capacitor 10 9 8 vif input tab/gnd .252 (6.4) .164 (4.2) .764 (19.4) max .300 (7.62) .100 (2.54) .020 (.508) .100 (2.54) 2.00 (5.08) max 8 14 7 1
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