TDA1581T Datasheet (NXP) - radio transmissions Decoder

TDA1581T, radio transmissions Decoder

TDA1581T The TDA1581T decoder is for radio transmissions having 57 kHz amplitude-modulated subcarriers as used in the german ‘Verkehrs Warnfunk’ (VWF) traffic warning system.

QUICK REFERENCE DATA Measured in Fig.3 at ViSK = 8 mV; f = 57 kHz amplitude modulated with fm = 34.95 Hz and m = 60% for ‘

TDA1581T Features

* Selective subcarrier amplifier (57 kHz) with gain control

* Transmitter identification signal (SK) decoder

* Area identification signal (BK) and announcement identification signal (DK) active filtering

* BK and DK decoders (Schmitt trigger with switched hysteresis)