TDA4340X

Stereo Decoder/Noise Blanker TDA 4340X 1 1.1 Overview Features Internal reference voltage source Adjustment free oscillator with ceramic resonator 456 kHz Pilot dependent mono/stereo switching with hysteresis P-DSO-20-1 Stereo indicator output Analogue control of mono/stereo change over (stereo noise control, SNC) Pilot canceller (19 kHz) Adjacent channel noise suppression (114 kHz) MUTE facility Analogue control of deemphasis (high cut control, HCC). Stereo inputs for additional signal source at output amplifiers Interference noise detector with integrated high-pass filter (IF level signal or MPX input) MPX input low-pass filter Noise blanking at MPX demodulator outputs Input and output level adjustable (resistor values) Type TDA 4340X 1.2 Application Ordering Code Q67000-A5058 Package P-DSO-20-1 The TDA 4340X is an integrated circuit providing the stereo decoder function and noise blanking for FM car radio applications. Semiconductor Group 1 04.96 TDA 4340X 1.3 Pin Configuration (top view) P-DSO-20-1 Figure 1 Semiconductor Group 2 04.96 TDA 4340X 1.4 Pin No. 1 2 3 4 5 6 7 Pin Definitions and Functions Function Phase detector output, PLL loop filter Oscillator pin (456 kHz) Ground Reference current pin, external reference resistor Positive supply voltage Interference detector input, noise detector input Timing capacitor for monoflop (gate time) Low voltage applied turns off oscillator, phase detector, pilot detector, SNC an...