Datasheet — A1458 Optocoupler

These values make the A1458 suitable for signals up to . For higher frequencies (e.g., >200 kHz), consider a high-speed optocoupler like the 6N137.

Extremely high common mode transient immunity (CMTI) ensures reliable performance in "noisy" industrial environments.

You need a resistor in series with the LED. a1458 optocoupler datasheet

Typically rated between 2,500 Vrms and 5,000 Vrms (depending on the specific manufacturer package variant), ensuring robust protection against voltage surges.

Its primary function is to provide galvanic isolation—using light to transfer signals—to protect control circuits (microcontrollers, DSPs) from dangerous transient voltages and surges on the power side. 2. Key Features and Technical Specifications These values make the A1458 suitable for signals up to

This configuration uses to improve noise performance and signal integrity.

Understanding the exact absolute maximum ratings and electrical characteristics guarantees long-term component reliability. Below is the summary of technical specifications derived from the Avago/Broadcom HCPL-1458 technical data sheets : Specification Value Context / Conditions 1 Mb/s (Typical) High-speed logic switching Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub ) 3750 to 5300 VRMScap V sub cap R cap M cap S end-sub Per UL1577 standards (1 minute duration) Common Mode Rejection (CMR) 15 kV/µs to 50 kV/µs At high common-mode voltages ( VCMcap V sub cap C cap M end-sub Supply Voltage Range ( VCCcap V sub cap C cap C end-sub ) 4.5V to 15V (Wide VCCcap V sub cap C cap C end-sub architecture) Flexible dual-rail operational setups Supply Current ( ICCcap I sub cap C cap C end-sub ) 1.2 mA (Maximum) Optimized for low-power digital designs Propagation Delay Max ( ) 8 ns to 300 ns Highly configuration-dependent Output Type Open Collector / Push-Pull Dependent on the exact suffix variant Operating Temperature Range -40°C to +100°C Industrial or automotive environments Internal Architecture & Mechanical Packages You need a resistor in series with the LED

5V Logic Side Isolated 12V Side +5V +12V | | [R1] (Current Limiter) [R2] (Pull-up) | | +----(Pin 1: Anode) (Pin 8: Collector)---+----> Output Signal MCU | | Pin --+----(Pin 2: Cathode) (Pin 7: Emitter)-----+---- GND (Isolated) Component Value Calculation

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

: Often used as direct logic-output substitutes .

A critical note for anyone reading an "A1458 optocoupler datasheet" is that "A1458" is often an abbreviation for a series of related devices from Broadcom/Avago. The most common members of this family are the and the HCNW1458 . While pin-compatible in many aspects, they have distinct performance characteristics.