Datenblatt-Suchmaschine für elektronische Bauteile |
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LA1784M Datenblatt(PDF) 10 Page - Sanyo Semicon Device |
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LA1784M Datenblatt(HTML) 10 Page - Sanyo Semicon Device |
10 / 50 page No. 6039-10/50 LA1784M Pin No. Function Description Equivalent circuit 23 + – + – + – 4.9 V 50 k Ω 150 Ω 50F 1.3 V 10 k Ω 51 k Ω STOP IF BUFF. Forced SD: 2.5 V SEEK 5 V SD circuit SW VCC AM MUTE IF counter buffer A11724 32 24 10 k Ω 10 k Ω VCC FM S-meter AM S-meter AM/FM SW AM/FM SW MRC Outputs a 1-mA current during AM reception A11725 26 100 k Ω VDD AM/FM SD Stereo indicator Seek/stop switching A11726 Continued from preceding page. Continued on next page. This pin functions both as the IF counter buffer (AC output) and as the seek/stop switch pin. The voltage V23 switches between the following three modes. 23 IF counter buffer seek/stop During FM reception: switching 5 V: Seek mode 2.5 V: Forced SD mode 0 V: Reception mode AM reception (two modes: 0 and 5 V) 5 V: Seek mode 0 V: Reception mode 24 AM/FM signal meter Fixed-current drive signal meter output In AM mode, pin 32 outputs a 32 Dedicated FM signal meter 1-mA current. Thus the HCC circuit is turned off. The voltage V23 switches between three modes as follows. FM reception: 5 V: The SD pin operates linked to the IF counter buffer. 26 Stereo indicator for the SD pin 2.5 V: Forced SD mode: operates as the SD pin. 0.7 V: Reception mode: stereo indicator AM reception: (two modes: 0 and 5 V) 5 V: Operates as the seek SD pin. 0 V: Reception mode. Not used. |
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Ähnliche Beschreibung - LA1784M |
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