A1458 Optocoupler Datasheet

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

What are the and output voltage levels of your system?

Used in the feedback loop to regulate output voltage while keeping the high-voltage AC side isolated from the DC output.

) is a high-speed, logic-gate optocoupler designed by Broadcom (formerly Avago Technologies). It is specifically engineered for applications requiring robust galvanic isolation and high-speed signal transmission, such as industrial control systems and data communications. a1458 optocoupler datasheet

Example order code: A1458-B (CTR rank B)

Connect Pin 8 to the 12V/24V supply. Place a pull-up resistor ( ) between Pin 8 ( VCCcap V sub cap C cap C end-sub ) and Pin 6 ( VOUTcap V sub cap O cap U cap T end-sub

| 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 | These are the "do not exceed" limits

Most A1458 components come in the standard . If you are looking at the top of the chip with the notch facing up:

While exact parameters vary between specific production runs and packaging formats (such as the SOP-8 hermetic package), standard values outlined in the A1458 datasheets represent the following operating characteristics: Typical Value / Spec Context & Importance Broad logic compatibility, safe for battery power. Propagation Delay High-speed response, preserving duty cycle control. Output Type Open Collector / Gate Driver Capable of sinking/sourcing current for power switches. Packaging Hermetically Sealed SOP-8 Extreme durability against environmental pollutants. Isolation Barrier Standard High-Voltage Protects microcontrollers from high power spikes.

When reviewing an A1458 datasheet, engineers look closely at specific graphs to calibrate their designs: Used in the feedback loop to regulate output

: Isolated line receivers and high-speed logic ground isolation. Equivalent & Substitute Parts If the A1458 is unavailable,

However, finding a consolidated, detailed explanation of the can be challenging. This article serves as a complete guide to the A1458. We will dissect every section of the datasheet—from absolute maximum ratings to switching characteristics—providing engineers, hobbyists, and students with the knowledge needed to integrate this component effectively.

Ensure the forward current ( IFcap I sub cap F

: Ground return connection for the isolated secondary receiver circuit. Pin 6 ( VOcap V sub cap O