器件名称:
TDA1581T
功能描述:
Decoder for traffic warning VWF radio transmissions
文件大小:
115.58KB 共14页
简 介:
INTEGRATED CIRCUITS DATA SHEET TDA1581T Decoder for traffic warning (VWF) radio transmissions Preliminary specication File under Integrated Circuits, IC01 March 1992 Philips Semiconductors Preliminary specication Decoder for trafc warning (VWF) radio transmissions 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) BK and DK switch-on/switch-off delay circuits SK and BK control outputs. GENERAL DESCRIPTION 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 ‘BK-trafc area C’ signal; or with fm = 125 Hz and m = 30% for DK signal SYMBOL VP IP ViSK Zi ViSK Vi(p-p) mBKon mBK tdSKon tdSKoff mDKon mDK tdDKon tdDKoff Tamb supply current nominal input voltage input impedance control level input voltage peak-to-peak value SK switch-on threshold level SK switch hysteresis SK switch-on delay SK switch-off delay DK switch-on threshold level DK switch hysteresis DK switch-on delay DK switch-off delay operating ambient temperature range f = 57 kHz f ≤ 57 kHz 3 dB PARAMETER supply voltage range CONDITIONS MIN. 7.5 100 2 ……
