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LA1845N Arkusz danych(PDF) 4 Page - Sanyo Semicon Device |
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LA1845N Arkusz danych(HTML) 4 Page - Sanyo Semicon Device |
4 / 9 page LA1845N No.7185-4/9 Test Circuit 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 REG 2.3 Vreg = 2.3V 3 4 AM IF input Vreg Input impedance ri = 2kΩ 4 5 GND 0 6 7 Tu-LED ST-LED / AM-IF output VCC VCC Active low Open collector 6 7 8 FM detector VCC The 600BEAS-10471 (Toko Mfg. Co., Ltd.) is recommended for detector coil. 9 VCC 10 AM / FM IF counter output, output control switch, mute switch 0 V10 ≤ 0.5V : Reception state 1.4V ≤ V10 ≤ 2.2V : Muting on V10 ≤ 3.5V : IF counter output and muting on 10 Continued on next page. + + + 1 2 5 6 10 24 23 22 21 20 19 18 17 16 15 14 13 VCC 5.0V Top view MONO + OSC BUFF FM-IN (10.7MHz) + AM/FM IF-BUFF SEEK 1 μF1μF + 0.47 μF 3k Ω 50k Ω 33 μF 75 Ω 300 Ω 6.8k Ω 5.6k Ω 1000pF 20pF 39pF 1000pF 0.047 μF 0.047 μF 22 μF 0.047 μF 0.0047 μF 0.015 μF 0.015 μF 10 μF 0.1 μF 0.01 μF + 4.7 μF 0.047 μF 3.3 μF 39MH HW50425 50k Ω 10k Ω 1000pF NORMAL TU-LED ST-LED V-SD V-ST AM IF 600BEAS-10471 Detector coil Discriminator HW6215 7 4 9 8 11 3 AM FM 12 20pF 1000pF 50 Ω 20k Ω 20k Ω 65k Ω AM-IN (1MHz) LPF A LPF A 0dB LOUT ROUT LA1845N |
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