A1458 Optocoupler Datasheet Page

, ensuring signal integrity in electrically noisy environments. Output Type Open Collector , allowing for flexible logic level shifting. Core Features & Design Hermetic Sealing

, which allows the device to maintain signal integrity even in environments with severe electromagnetic interference. Supply Voltage ( cap V sub cap C cap C end-sub : Operates between 4.5 V and 5.5 V , compatible with standard TTL and CMOS logic levels. Output Type Open Collector

Traditional optocouplers suffer from high base-collector capacitance in their phototransistors, slowing down switching. Devices like the HCPL-A1458 bypass this by utilizing a separate photodiode detector paired with integrated amplification, boosting speed up to 100 times. a1458 optocoupler datasheet

Why choose the A1458 over a standard transistor? Here are the most common use cases:

Mechanical Note: The distance between the LED and phototransistor inside the A1458 is precisely controlled to ensure a CTR consistency of ±20% from batch to batch. Supply Voltage ( cap V sub cap C

When PLC output is high (24V), LED turns on, phototransistor conducts, output pin pulled low. When PLC output low, LED off, output pulled high by R2.

) passes from the anode to the cathode, the LED emits infrared light. Why choose the A1458 over a standard transistor

Providing feedback from the secondary side to the primary side without a direct wire connection.

Optocouplers have a "Rise Time" and "Fall Time." If you are sending high-speed PWM signals (above 10kHz), check the datasheet for the switching speed to ensure the signal doesn't become distorted.

This article provides a comprehensive overview of the HCPL-A1458, drawing from key datasheet information, exploring its technical features, pinout, and typical applications, designed for design engineers and electronics technicians. 1. What is the HCPL-A1458 Optocoupler?

The A1458 is characterized by its speed and high noise immunity. Below are the primary technical parameters found in the HCPL-1458 datasheet Maximum Data Rate , making it suitable for high-speed digital communication. Propagation Delay : Approximately (typical), ensuring fast signal response times. Isolation Voltage : Rated at (standard) or up to depending on the specific variant/package. Common Mode Rejection (CMR) : Minimum of