The component arrives across multiple surface-mount and through-hole packaging form-factors:
The A1458 is an optoisolator that uses light to transfer electrical signals between two isolated circuits. It consists of a Gallium Arsenide (GaAs) infrared LED on the input side and a high-gain phototransistor or integrated detector on the output side.
voltage spikes across the isolation barrier. Without high CMTI, these transients couple through the internal parasitic capacitance of the optocoupler, inducing false trigs at the output. With a minimum rating of up to 50 kV/µs, the A1458 shields downstream microcontrollers from destructive noise. Primary Engineering Applications
When researching "a1458 optocoupler datasheet", watch for these issues: a1458 optocoupler datasheet
: Isolated line receivers and high-speed logic ground isolation. Equivalent & Substitute Parts If the A1458 is unavailable,
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: Frequently used in solar and wind turbine power systems. Without high CMTI, these transients couple through the
package. While you should always verify with the official diagram from Broadcom's technical data
Negative terminal of the internal input IR LED.
Below is an outline for designing a simple digital isolation circuit using one channel of the A1458 to translate a 5V MCU logic signal across an electrical barrier to a separate 12V system. Circuit Diagram Layout Equivalent & Substitute Parts If the A1458 is
This datasheet is for informational purposes. Verify specifications with original component supplier before design-in.
The (frequently cross-referenced as the HCPL-1458 or HP1458 by Broadcom/Avago Technologies ) is a high-performance, high-speed, single-channel logic gate optocoupler engineered for ultra-fast digital logic isolation. Designed to prevent ground loops and shield low-voltage control circuits from high-voltage spikes, this component delivers a fast data rate of 1 Mb/s , combined with a low power consumption profile.