Optocoupler Datasheet — A1458

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With a maximum input current consumption ( ICCcap I sub cap C cap C end-sub

The (widely documented in component catalogs as the HCPL-1458 or HCPL-A1458 ) is a high-speed, high-performance logic gate optoisolator manufactured by Broadcom (formerly Avago Technologies). Engineered primarily for high-speed signal isolation in rugged industrial or low-voltage systems, this component leverages a hermetically sealed architecture to deliver excellent common-mode transient immunity and stable high-data-rate throughput.

| Pin No. | Name | Description | |---------|-------------|----------------------------| | 1 | Anode (A) | Positive input of LED | | 2 | Cathode (C) | Negative input of LED | | 3 | Emitter (E) | Phototransistor emitter | | 4 | Collector (C)| Phototransistor collector | a1458 optocoupler datasheet

These are the "do not exceed" limits. Exceeding these will result in a fried component (and potentially a fried circuit).

The output phototransistor is an "open collector." It acts like a switch to ground. To get a logic signal, you need a pull-up resistor (usually 1kΩ to 10kΩ) connected to the Collector pin.

Based on field application notes from the datasheet, here are common issues: This public link is valid for 7 days

The A1458 is favored in industrial applications for its fast switching speeds and high common-mode noise rejection.

package. While you should always verify with the official diagram from Broadcom's technical data

: Typically supports data rates up to 10–15 MBd . Can’t copy the link right now

(Note: Always double-check the specific manufacturer’s datasheet, as pin numbering can occasionally differ in SMD versions).

Available in standard surface-mount (SMD) and dual-in-line (DIP) packaging for versatile PCB design.