In summary – The STK411-210E datasheet “story” is a ghost: a once-common part lost to time, where only the base STK411-210 specs survive. If you need to service an old stereo using that module, treat it as an STK411-210 and verify with a curve tracer or low-voltage test before powering up.
The STK411-210E is a hybrid integrated circuit (Hybrid IC) manufactured by Sanyo Semiconductors (now part of ON Semiconductor). Part of the renowned STK series of audio amplifier modules, this component was designed specifically for high-quality stereo audio applications in the late 1980s through the early 2000s. While the STK series has been largely discontinued, the STK411-210E remains highly sought after by vintage audio enthusiasts, repair technicians, and DIY audiophiles who restore classic stereo receivers, powered mixers, and home theater systems.
This article provides a complete technical breakdown of the STK411-210E datasheet, including pinout, absolute maximum ratings, electrical characteristics, typical application circuits, thermal considerations, and troubleshooting advice. Stk411-210e Datasheet
The STK411-210E is straightforward to implement. Below is a summarized circuit description based on the datasheet's reference design.
If you're looking for the actual datasheet for the STK411-210E, I recommend checking the following resources: In summary – The STK411-210E datasheet “story” is
The STK411-210E uses a 15-pin staggered SIP. Below is the pinout as per the original Sanyo datasheet:
| Pin No. | Symbol | Description | |---------|-------------|--------------------------------------| | 1 | CH1 IN (+) | Non-inverting input (Channel 1) | | 2 | GND | Signal ground | | 3 | Vcc | Positive power supply (+Vcc) | | 4 | CH1 OUT | Speaker output (Channel 1) | | 5 | GND | Power ground | | 6 | Vee | Negative power supply (-Vcc) | | 7 | CH2 OUT | Speaker output (Channel 2) | | 8 | GND | Signal ground | | 9 | CH2 IN (+) | Non-inverting input (Channel 2) | | 10 | N/C | Not connected | | 11 | N/C | Not connected | | 12 | Vcc2 | Positive supply (internal driver) | | 13 | N/C | Not connected | | 14 | Vee2 | Negative supply (internal driver) | | 15 | GND | Substrate ground | Without a direct datasheet or more context:
Important Note: Pins 12 and 14 are often internally connected to pins 3 and 6 respectively in many circuits, but the datasheet recommends separate decoupling for optimal performance.
+28V ———— 100nF ———— 4700µF ———— Pin 3 (Vcc)
-28V ———— 100nF ———— 4700µF ———— Pin 6 (Vee)
Signal IN ———— 2.2µF ———— Pin 1 (CH1 IN)
Pin 4 (CH1 OUT) ———— Zobel ———— Speaker (+)
Speaker (–) ———— Pin 5 (GND Power)
Without a direct datasheet or more context: