What is BU1920?


This is RDS / RBDS decoder.

A demultiplexer, also known as a "demux," is a digital circuit that takes a single input signal and directs it to one of several possible outputs. It is essentially the reverse of a multiplexer, which takes multiple inputs and directs them to a single output.


[PDF] Complete Technical Details can be found in the BU1920 datasheet provided at this page.

Summary in PDF File


Audio ICs RDS RBDS decoder BU1920 BU1920F BU1920FS The BU1920 BU1920F and BU1920FS are RDS RBDS decoders that employ a digital PLL It has a built in anti aliasing filter and an eight stage BPF switched capacitor filter Linear CMOS circuitry is used for low current dissipation FApplications RDS RBDS compatible FM receivers for Europe and North America car stereo systems home stereo systems and FM pagers FFeatures 1 Low current dissipation 2 Two stage anti aliasing filter 3 57kHz bandpass filter 4 DSB demodulation digital PLL 5 ARI signal discrimination 6 Quality indication output for demodulated data FAbsolute maximum ratings Ta 25_C FRecommended operating conditions Ta 25_C 170 Audio ICs FBlock diagram Application example BU1920 BU1920F BU1920FS Pin assignments 171 Audio ICs FPin descriptions BU1920 BU1920F BU1920FS 172 Audio ICs FInput output circuits BU1920 BU1920F BU1920FS 173 Audio ICs BU1920 BU1920F BU1920FS FElectrical characteristics unless otherwise noted Ta 25_C VDD 5 0V and GND 0 0V Filter block Demodulator block 174 Audio ICs FOutput data timing BU1920 BU1920F BU1920FS The clock RCLK frequency is 1187 5Hz Depending on the state of the internal PLL c

Datasheet Download (PDF)


[ Detailed Data ]


The basic design of a demultiplexer involves using a set of logic gates to decode the control signals and direct the input signal to the selected output channel. The input signal is usually passed through a series of AND gates, with each gate corresponding to one of the possible output channels. The control signals are used to enable the appropriate AND gate, while the other gates are disabled.

Manufacturers : ROHM Semiconductor

ROHM - BU1920 Datasheet PDF

ROHM BU1920 DATA

RDS / RBDS decoder

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Datasheet BU1920.PDF DownLoad ( ROHM )


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