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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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TDA1581 데이터시트(PDF) 7 Page - NXP Semiconductors |
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TDA1581 데이터시트(HTML) 7 Page - NXP Semiconductors |
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7 / 14 page  March 1992 7 Philips Semiconductors Preliminary specification Decoder for traffic warning (VWF) radio transmissions TDA1581T APPLICATION INFORMATION (see Fig.3) Notes to the application information 1. Sequence for measuring switch-on delay times (tdon) a) Nominal BK or DK input signal at pin 15: Vi(p-p)= 8 mV; f = 57 kHz; modulation-on. b) Pin 4 of the BK detector (pin 18 of the DK detector) is switched to ground to cause a low signal at the SK output at pin 3 (DK output at pin 2). c) tdon commences when the ground connection is removed from pin 4 (pin 18) as the positive-going VoBK signal at pin 5 (VoDK signal at pin 17) crosses zero. tdon ends when the positive-going edge of the SK output arrives at pin 15 (DK at pin 2). 2. Sequence for measuring switch-off delay times (tdoff) a) Nominal operating conditions as in note 1. b) tdoff commences when the input is switched off as the negative-going VoBK signal at pin 5 (VoDK signal at pin 17) crosses zero. tdoff ends when the negative-going edge of the SK output arrives at pin 3 (DK at pin 2). SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT ViSKon SK switch-on threshold level mBK = 60 % − 1.8 − mV mBKon SK switch-on threshold level ViSK = 8 mV − 32 − % SK switch hysteresis 3.0 3.5 4.0 dB tdSKon SK switch-on delay note 1 − 95 200 ms tdSKoff SK switch-off delay note 2 380 500 700 ms ViDKon DK switch-on threshold level mDK = 30 % − 1.5 − mV mDKon DK switch-on threshold level ViDK = 8 mV − 13 − % DK switch hysteresis 3.1 3.6 4.1 dB tdDKon DK switch-on delay note 1 − 750 1000 ms tdDKoff DK switch-off delay note 2 600 750 1000 ms m BKon m BKoff ----------------- m DKon m DKoff ----------------- |
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