TDA4439 - TEMIC Semiconductors

TDA4439 Video IF Amplifier for Multistandard TV and VTR

1 2 3 4 5 6 7 8 95 10840 TELEFUNKEN Semiconductors 16 15 14 13 12 11 10 9 Pin 1, 18 2 3, 17 4 5 6 7 8, 11 9, 10 12 13 14 15 16 Function IF input Standard switch: open B/G ground L Ground IF-AGC storage capacitor AGC (tuner control) Tuner AGC take over Polarity switch: open AFC “DOWN” ground AFC “UP” Demodulator circuit AFC circuit AFC output Average cap.

Features

D Standard B/G-L suitable, processes negatively and positively modulated IF-signals with equal polarity of the output signal D High input sensitivity D Fast AGC by controlled discharge of the AGC capacitor Standard L mode: AGC acting on peak white level, capacitor discharge control by averaged video signal Standard B/G: AGC acting on the sync. pulse peak D Ultra white inverter and ultra black limiter for reducing transmission interference D Internally noise protected gain control, no flyback pulses required D Expanded video frequency response allows the demodulation of amplitude modulated .