1458 Optocoupler Datasheet

The details a high-performance, hermetically sealed Broadcom/Avago Technologies optical isolator optimized for low-voltage, high-speed applications. Designed to bridge the gap between high-power electrical circuits and sensitive logic-level microcontrollers, this integrated circuit ensures signal integrity while providing massive common-mode noise suppression. This comprehensive technical guide breaks down everything found in its datasheet, from pinout configurations to engineering implementation. Key Technical Specifications

When a forward current flows through the input LED, it emits infrared light. This light spans the internal isolation gap and strikes the base-collector junction of the adjacent phototransistor. The photons generate electron-hole pairs, inducing a base current that switches the transistor into a conductive state. Because the connection is purely optical, there is no electrical path between the input and output terminals. Pin Configuration and Package Styles

Excellent Common-Mode Transient Immunity (CMTI) ensures data integrity in noisy industrial environments. Decoding the Specifications 1458 optocoupler datasheet

– The emitter terminal of the output phototransistor. Typically connected to the output ground in common-emitter configurations.

Capable of operating effectively within a low supply voltage and low input forward current ( IFcap I sub cap F ) range, maximizing power efficiency. Wide Supply Voltage ( VCCcap V sub cap C cap C end-sub Key Technical Specifications When a forward current flows

) : Features a wide supply range, allowing for flexibility in various system designs. : Low input current ( IFcap I sub cap F ) requirements help reduce total drive power needs.

Low-Voltage Side (MCU) High-Voltage Side (Industrial) +5V +12V | | [R1] (Current Limiter) [R2] (Pull-up) | | +----( Pin 1: A1 ) ( Pin 8: VCC )-+ ( Pin 7: VO1 )-+---> Isolated Output to Driver MCU Output --( Pin 2: K1 ) | ( Pin 5: GND )-+ | System GND Use code with caution. To calculate the input resistor R1cap R sub 1 Because the connection is purely optical, there is

range of , allowing compatibility with both legacy 5V and modern 3.3V logic systems.

, which is not an optocoupler. However, if you are looking for an optocoupler with a similar designation, the Go to product viewer dialog for this item.

Trade-off: This bleeds off some of the optically generated base current, which decreases the overall CTR (sensitivity) but significantly increases the switching speed for PWM applications. 7. Troubleshooting and Best Practices

: Features a minimum common-mode rejection (CMR) rating of , filtering out quick spikes in voltage.