Typically Signal Input / Feedback / Pre-amp Section. Pins 6-10: Feedback and Grounding. Pins 11-12: Positive Power Supply ( ) and Ground. Pins 13-16: Negative Power Supply ( ) and Ground. Pins 17-22: Speaker Output / Output Section.

However, I’m having trouble finding a clear, high-resolution version of the original datasheet. Most available copies online are incomplete or illegible.

Sanyo STK411-210E is a thick-film hybrid integrated circuit designed for use as a high-fidelity two-channel audio power amplifier. It is part of a series known for its pin-compatibility across various power outputs, which simplifies the design process for audio systems. Core Features and Specifications Dual-Channel Integration:

Drives the voltage swing near the maximum rails while maintaining high linearity.

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Rated for case temperatures up to 105∘C105 raised to the composed with power C 125∘C125 raised to the composed with power C absolute junction maximum). Pin Configuration & Structural Design

: Typically operates on a split/dual power supply ( ±VCCplus or minus cap V sub cap C cap C end-sub

The recommended operating voltage is , with a maximum of ±55V DC . Ensure your transformer’s secondary voltage, after rectification and smoothing, does not exceed ±55V under no-load conditions.

Since the STK411-210E is discontinued, sourcing options include:

For professionals needing this specific model, the primary sources are:

The is a high-performance Audio Frequency (AF) Power Amplifier Hybrid IC produced by Sanyo (now part of Panasonic) . Known for its reliability and high-fidelity sound, this component has been a staple in audio design for years, particularly in stereo systems, home theaters, and high-quality speaker units.

Despite its moderate power rating, the STK411-210E requires a to prevent thermal shutdown or damage.