A1458 Optocoupler Datasheet [repack] File

Minimum 50 kV/µs transient immunity, allowing the device to clean up signal lines in highly polluted electromagnetic environments. Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub

Output is compatible with both TTL and CMOS logic levels, facilitating direct interfacing.

If you are ready to put the A1458 on a breadboard or PCB, follow these steps:

| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit | |--------------------------|--------|-------------------------|-----|-----|-----|-------| | LED forward voltage | VF | IF = 20 mA | 1.1 | 1.2 | 1.4 | V | | LED reverse current | IR | VR = 6 V | - | - | 10 | µA | | Collector dark current | ICEO | VCE = 20 V, IF = 0 | - | - | 100 | nA | | Current transfer ratio | CTR | IF = 5 mA, VCE = 5V | 50 | 300 | 600 | % | | Collector-emitter sat. | VCE(sat)| IF = 10 mA, IC = 2 mA | - | 0.2 | 0.4 | V | | Isolation resistance | RISO | VIO = 500 Vdc | 10¹¹| - | - | Ω | | Capacitance (input-output)| CIO | f = 1 MHz | - | 1.0 | - | pF | a1458 optocoupler datasheet

, essential for protecting sensitive microcontrollers from high-voltage power stages. Key Specifications Up to 50 MBd Propagation Delay 20 ns (typical) Isolation Voltage Supply Voltage ( cap V sub cap C cap C end-sub 3.0V to 5.5V Operating Temp Typical Applications

): Often rated up to 35V or 70V depending on the specific variant. Usually ranges between 50mA and 100mA. Saturation Voltage (

Before we dissect the numbers, let’s understand the anatomy. The A1458 is a . This means it consists of two primary components housed within a single, light-tight package (usually a DIP-4 or SMD format): Minimum 50 kV/µs transient immunity, allowing the device

What are the and output voltage levels of your system?

The A1458 excels in high-noise industrial environments. Below are two classic implementation examples. Microcontroller to Industrial Actuator Interface

) meets the minimum threshold required to switch the output detector reliably, without exceeding the absolute maximum limit of 25mA. | VCE(sat)| IF = 10 mA, IC = 2 mA | - | 0

This configuration uses to improve noise performance and signal integrity.

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.

By integrating two independent channels into a single compact package, the A1458 allows designers to save valuable printed circuit board (PCB) real estate while managing multiple isolated signal lines simultaneously. Key Features