High Quality - A1458 Optocoupler Datasheet

The output phototransistor is an "open collector." It acts like a switch to ground. To get a logic signal, you need a pull-up resistor (usually 1kΩ to 10kΩ) connected to the Collector pin.

The is a high-speed, reliable solution for isolating sensitive logic components from high-voltage, high-noise environments. Its 1 Mb/s speed,

Page 3 of the official usually contains a "Test Circuit" diagram. Here is the standard configuration for digital signal isolation: a1458 optocoupler datasheet

The (frequently designated as the HCPL-1458 or HCPL-A1458 ) is a high-speed, low-power, logic-gate optocoupler engineered by Broadcom (formerly Avago Technologies) . Optimized for robust electronic insulation and rapid signal transmission, this device utilizes an integrated Gallium Arsenide Phosphide (GaAsP) LED optically coupled to a high-gain, high-speed photodetector. This architectural approach achieves exceptional galvanic isolation up to 5300 Vrms , making it a staple component in high-voltage industrial systems, motor drives, and telecommunications equipment. Core Functional Specifications

Offers electrical isolation up to 5300 VRMScap V sub cap R cap M cap S end-sub (with variations down to 3750 VRMScap V sub cap R cap M cap S end-sub The output phototransistor is an "open collector

By placing the A1458 between the UART Tx/Rx lines of the transceiver and the local microcontroller, the ground systems are entirely separated. This guarantees clean data packets over long distances, even in factories with heavy motor EMI (Electromagnetic Interference). 6. Design and Layout Best Practices

In long-distance data communication lines, ground potential differences between nodes can create massive ground loop currents. Its 1 Mb/s speed, Page 3 of the

Open Collector / Base connection (depending on package option variant). Pin 8 ( VCCcap V sub cap C cap C end-sub