The Rohm Semiconductor BH1417F is a broadcast stereo encoder integrated circuit designed for FM transmission applications. This IC generates a stereo signal from left and right audio input signals, enabling the transmission of high-quality stereo audio over the FM band. The BH1417F incorporates a pre-emphasis circuit, pilot tone generator, and other necessary functions for FM stereo broadcasting.

Applications

• FM transmitters for personal audio devices
• Wireless audio streaming devices
• Car audio systems
• PC audio transmission
• DIY FM broadcasting projects

Features

• Integrated stereo encoder
• Pre-emphasis circuit (50/75 μs selectable)
• Pilot tone generator (19 kHz)
• Low harmonic distortion
• Low noise
• Stable pilot signal
• Adjustable output level
• Single power supply operation

Benefits

• Enables high-quality stereo audio transmission over FM
• Simple and compact solution for FM broadcasting
• Reduces external component count, simplifying design
• Ensures compliance with FM broadcast standards
• Provides clear and stable audio signal
• Easy to integrate into various audio devices

Additional Details

The BH1417F operates on a single power supply, typically around 5V. It includes a built-in pre-emphasis circuit which is selectable between 50 μs and 75 μs to meet different broadcast standards. The 19 kHz pilot tone generator is crucial for receiver stereo decoding. The IC's low harmonic distortion ensures clean audio transmission, while the adjustable output level allows matching the signal strength to the transmitter. Its compact size and minimal external components make it ideal for space-constrained applications. The part comes in a SOP22 package.

Because this part is END-OF-LIFE, sourcing options may be limited.