The datasheet for the 1458 series of optocouplers is a complete technical manual that, when understood, becomes a powerful design tool. By systematically working through the sections—starting with features, moving to pinout, then to absolute maximum and electrical specifications—you can confidently integrate this versatile component into your projects and ensure both robust performance and safety.
The 1458 optocoupler—most commonly encountered as the or as part of the broader 1458 series of optical isolators—is a specialized semiconductor component designed to transfer electrical signals between two isolated circuits using light. By using a light-emitting diode (LED) paired with a photosensitive transistor, this device prevents high voltages on the output side from damaging sensitive components on the input side.
Unlike legacy high-speed optocouplers that require a rigid 5V supply, the HCPL-1458 thrives between . This makes it perfectly tailored for battery-powered systems, IoT nodes, and modern low-power microcontrollers operating on a 3.3V bus. High-Speed Propagation Low Delay 1458 optocoupler datasheet
Because the output is an open collector, an external pull-up resistor ( RLcap R sub cap L ) is required. Lower resistor values (e.g., 470 Ωcap omega
Here is the technical content for a . Since "1458" is not a standard industry part number for an optocoupler (it is typically associated with the dual operational amplifier), this datasheet assumes the 1458 refers to a general-purpose phototransistor optocoupler (similar to a 4N35 or PC817 but with a unique in-house marking). For actual use, please verify the manufacturer (e.g., Siemens, Vishay, or a Chinese brand). The datasheet for the 1458 series of optocouplers
) : Features a wide supply range, allowing for flexibility in various system designs. : Low input current ( IFcap I sub cap F ) requirements help reduce total drive power needs.
Protects sensitive MCUs (like Arduino, ESP32, or STM32 platforms) from back-EMF spikes generated by industrial sensors, relays, or motors. By using a light-emitting diode (LED) paired with
to physically separate low-voltage control logic from dangerous high-power lines. Pinout Configuration (SOP-8 Package)
Open-collector output, which can handle voltages up to 20V . Pin Configuration (8-Pin DIP/SO-8)
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