Datenblatt-Suchmaschine für elektronische Bauteile |
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LA1837 Datenblatt(PDF) 4 Page - Sanyo Semicon Device |
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LA1837 Datenblatt(HTML) 4 Page - Sanyo Semicon Device |
4 / 9 page LA1837 Test Circuit LA1837 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 OSC BUFF (1.45MHz) T1 REG AFC + AM-IN (1MHz) 0.047 μF 39mH 10k Ω 0.047 μF + + 0.01 μF 10 μF 18k Ω + L.P.F + FM + L.P.F L-OUT R-OUT + STEREO + + 0.047 μF 100 μF VCC 9.0V VDD + AM VSM FM VSM T3 + ST AM-ST SD T2 450kHz + FM IN (10.7MHz) 300 Ω Top view Pin Functions Pin No. Pin function Pin voltage (V) Pin description Equivalent circuit 1 FM IF input Vreg Input impedance ri = 330Ω 1 3 2 AM mixer output VCC Connect the mixer coil between this pin and VCC. 2 3 FM IF input bypass Vreg Also functions as the MPX regulator filter. See pin 1. 4 AM IF input Vreg Input impedance ri = 2kΩ 4 5 GND 0V 6 7 TU-LED ST-LED AM-IF output VCC VCC Active low Open collector output AM stereo IF output (pin 7) The current input must not exceed 150 μA. 6 7 8 VCC VCC 9 FM detector VCC Recommended detector coil : 600BEAS-9715Z (The Toko Electric Corporation) 9 10 AM narrow band CF connection 1.3V Recommended narrow band CF: BFU450 C4N (Murata Mfg. Co., Ltd.) If the narrow band SD is not used, bypass this circuit with a 50 Ω resistor and a 0.047μF capacitor connected in series. 10 Continued on next page. No.5688-4/9 |
Ähnliche Teilenummer - LA1837 |
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Ähnliche Beschreibung - LA1837 |
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