A1458 Optocoupler Datasheet 2021 Jun 2026

The A1458 is a . It consists of an infrared light-emitting diode (LED) on the input side, optically coupled to an NPN silicon phototransistor on the output side. The coupling is achieved via a transparent insulating layer, typically providing isolation up to 5,000V RMS.

) of , keeping signal distortion negligible. Supply Voltage Range ( VCCcap V sub cap C cap C end-sub

No Internal Connection (NC) — Keep isolated on the PCB.

In the world of electronics, galvanic isolation is a critical requirement for safety, noise immunity, and signal integrity. Optocouplers (also known as opto-isolators) are the backbone of this technology. Among the myriad of components available, the stands out for its specific balance of speed, current transfer ratio, and isolation voltage.

Navigating the engineering documentation for this component is vital for optimized physical integration and reliable long-term deployment. This comprehensive breakdown analyzes the core metrics, architecture, and functional behavior outlined within a standard . Core Technical Specifications Overview a1458 optocoupler datasheet

Protecting telephone lines and modem interfaces from lightning strikes or power surges. Design Tips: Working with the A1458

) of 1,500 V, neutralizing high-frequency background electromagnetic noise. Supply Voltage ( VCCcap V sub cap C cap C end-sub

The A1458 is a standard speed optocoupler. It is great for low-frequency signals (relays, buttons, power switching). It is not suitable for high-speed data transmission (like Ethernet or high-speed SPI), as the transistor has a "saturation delay" (turn-off time) that slows the signal down.

: The output is fully compatible with standard TTL and CMOS logic gates. Applications The A1458 is a

Operating the device beyond these limits can cause permanent damage. All ratings are measured at an ambient temperature ( TAcap T sub cap A ) of 25°C unless otherwise specified. TSTGcap T sub cap S cap T cap G end-sub -55 to +125 Operating Temperature TAcap T sub cap A -40 to +85 Forward Input Current (Continuous) IFcap I sub cap F Peak Transient Input Current

Understanding the A1458 Optocoupler: A Comprehensive Datasheet and Application Guide

): Typical 1.5 mA to 2.5 mA depending on the output logic state. Switching Performance (High-Speed Dynamics) Maximum 0.8 Propagation Delay to Logic High ( tPLHt sub cap P cap L cap H end-sub ): Maximum 0.8 Common Mode Transient Immunity (CMR): Typically

To get the most out of your A1458, keep these design principles in mind: ) of , keeping signal distortion negligible

The (frequently referred to as the Go to product viewer dialog for this item.

Used in feedback loops for Switching Power Supplies (SMPS) to maintain isolation between primary and secondary stages.

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.

Understanding the pinout is crucial for proper circuit integration. While the pinout can vary slightly based on the specific variant (PDIP-8 vs. SOIC-8), the A1458 family generally follows a standard configuration.

The (often referred to as A1458 ) is a high-speed, single-channel logic gate optocoupler manufactured by Broadcom (formerly Avago). It is designed to bridge the gap between high-speed digital circuits while providing excellent electrical isolation. ⚡ Key Specifications