ROHM RDS RBDS decoder BU1923 BU1923F Data Sheet User Manual
Summary
The BU1923/BU1923F is a specialized RDS / RBDS decoder utilizing low-power linear CMOS circuitry and a digital PLL. It is designed for manufacturers needing reliable signal processing in applications such as car stereos, FM receivers (American and European markets), high-fidelity stereo systems, and pagers. This manual serves as a complete technical reference, providing detailed information regarding block diagrams, pin specifications, electrical characteristics, precise output data timing protocols (RDATA/RCLK), and the integrated quality indication features for seamless implementation.
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Audio ICs
RDS RBDS decoder BU1923 BU1923F The BU1923 and BU1923F are RDS RBDS decoders that employ a digital PLL and have a built-in anti-aliasing filter and an eight-stage BPF (switched-capacitor filter). Linear CMOS circuitry is used for low power consumption.
Applications RDS RBDS compatible FM receivers for American and European markets, car stereos, high-fidelity stereo systems and components, and FM pagers.
Features 1) Low current. 4) DSB demodulation (digital PLL). 2) Two-stage anti-aliasing filter (LPF). 5) Quality indication output for demodulated data. 3) 57k Hz band-pass filter.
Absolute maximum ratings (Ta = 25C)
Recommended operating conditions (Ta = 25C)
Page Summary Contents For ROHM RDS RBDS decoder BU1923 BU1923F Data Sheet User Manual
Manual Details
| Brand | ROHM |
|---|---|
| Pages | 6 |
| File Size | 83.60 KB |
| Published | June 16, 2026 |
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Frequently Asked Questions
What is the purpose of the QUAL pin?
It indicates the quality of demodulated data: HIGH for good data, LOW for poor data.
What is the RCLK clock frequency?
The clock (RCLK) frequency is 1187.5Hz as specified in the output data timing section.
What are the applications for BU1923 decoders?
Used in FM receivers, car stereos, high-fidelity stereo systems, and FM pagers for American and European markets.