A1458 Optocoupler Datasheet ~repack~ – Top-Rated
[ INPUT SIDE ] [ OUTPUT SIDE ] Pin 2 (Anode) ○───┐ ┌───○ Pin 8 (VCC) │ │ ▼ ──┐ ┌─┴─┐ ▲ │ │ │ Photodetector & └─┬─┘ └───┤ Logic Gate IC │ _│_│ Pin 3 (Cathode) ○────┘ /// │──○ Pin 6 (V_OUT) │ ─┴─ ○ Pin 5 (GND)
When Mara joined the engineering team at Lumina Controls, she inherited a dusty project: a compact motor driver that needed reliable isolation between its noisy power stage and the logic controller. The board had to survive electrical transients and meet safety requirements, but the tight budget and small PCB area meant they couldn’t use bulky transformers or expensive digital isolators.
Never connect the input pins directly to a power source. Use a resistor to limit the current ( IFcap I sub cap F ) to around 10–20mA for longevity.
If you need a specific type of sensor or a device from a different manufacturer like Allegro, I can also look that up. I can help find similar components to help with your design, such as looking for a different Allegro MicroSystems magnetic speed sensor or a phototransistor from a different vendor. Share public link a1458 optocoupler datasheet
, ensuring signal integrity in electrically noisy environments. Output Type Open Collector , allowing for flexible logic level shifting. Core Features & Design Hermetic Sealing
This technical analysis covers the internal mechanics, key electrical characteristics, pin configurations, and primary application workflows derived from the official technical datasheet documentation. Internal Architecture and Working Principle
): Highly energy-conscious, drawing a maximum of only . Pinout and Internal Schematic [ INPUT SIDE ] [ OUTPUT SIDE ]
No Internal Connection (NC) — Keep isolated on the PCB.
The device is distributed primarily in compact, industry-standard surface-mount and through-hole DIP-8 packages. The standard 8-pin layout separates high-voltage input lines cleanly from low-voltage logic outputs to prevent circuit tracking:
(Pin 8) and GND (Pin 5) pins to suppress high-frequency noise. Use a resistor to limit the current (
In the world of electronics, protecting sensitive control circuits from high-voltage spikes is a top priority. One of the most reliable ways to achieve this isolation is through an optocoupler. While many engineers are familiar with the standard 4N25 or PC817 series, the (often part of the HCPL-1458 or similar proprietary series) is a specialized component designed for specific industrial and signal-processing tasks.
) : Certified protection between 3750 Vrms to 5300 Vrms depending on the exact housing variant.
These performance specifications define how the A1458 behaves under normal working conditions. Input Diode Specifications Typical 1.5V (at Reverse Leakage Current ( IRcap I sub cap R ): Maximum Input Capacitance ( CINcap C sub cap I cap N end-sub ): 60 pF (at Output Detector Specifications Logic High Output Current ( IOHcap I sub cap O cap H end-sub ): Maximum when the input LED is off. Logic Low Output Voltage ( VOLcap V sub cap O cap L end-sub ): Maximum 0.6V when the input LED is active ( Supply Current ( ICCHcap I sub cap C cap C cap H end-sub ICCLcap I sub cap C cap C cap L end-sub