1458 Optocoupler Datasheet ((exclusive)) Jun 2026
Online distributor websites (like Mouser, DigiKey) have parametric search tools that allow you to filter by these specifications to find a suitable alternative.
Part numbers change, and manufacturers sometimes discontinue components. For the "1458" optocoupler, you have a few avenues to explore for alternatives:
: Used as a feedback element in switched-mode power supplies (SMPS). Comparison Note
(Voltage Output High): The minimum voltage measured at the output when the component is in a logic "HIGH" state. 4. Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub 1458 optocoupler datasheet
The 1458 optocoupler is a reliable and versatile device that offers high isolation voltage, high current transfer ratio, and fast response time. Its wide range of applications and compatibility with various packages make it a popular choice among designers and engineers. By analyzing the datasheet, we have highlighted the key features, specifications, and applications of the 1458 optocoupler, providing valuable insights for users and designers.
Perhaps the most important safety specification. The isolation voltage tells you the maximum amount of voltage the optocoupler can withstand between the input and output sides without breaking down. The
The datasheet may also provide information on typical applications, such as: Comparison Note (Voltage Output High): The minimum voltage
The 1458 optocoupler operates on the principle of optical coupling:
+---_---+ Anode | 1 6 | Base (Phototransistor) | | Cathode | 2 5 | Collector (Phototransistor) | | NC | 3 4 | Emitter (Phototransistor) +-------+ Use code with caution. Pin Description Table Pin Number Description Positive terminal of the input Infrared LED 2 Negative terminal of the input Infrared LED 3 No Internal Connection (leave floating) 4 Emitter terminal of the output Phototransistor 5 Collector terminal of the output Phototransistor 6 Base terminal of the output Phototransistor (optional use)
) Range: Supports an operational layout from , making it fully compatible with standard 3.3V and 5V digital logic devices. Its wide range of applications and compatibility with
The efficiency of the internal GaAs LED drops as operating temperatures rise. To counteract this, always design your circuit with extra margin (overdrive) for the input current.
: CTR is the ratio of the output collector current (IC) to the input forward current (IF), expressed as a percentage.
) accurately using Ohm's Law. Driving the LED too hard can degrade its lifespan, while under-driving it may cause unreliable switching. Final Thoughts
: Supports data rates with a maximum propagation delay ( ) of 8 ns . Wide Power Supply Range : Operates on a VCCcap V sub cap C cap C end-sub
For a traditional phototransistor output, CTR is a key indicator of efficiency. However, for the HCPL-1458 high-speed series, which often has a logic gate output, this is sometimes less relevant than its speed characteristics.