Note: Internally, the input consists of a GaAsP LED (Gallium Arsenide Phosphide) and the output consists of a photodetector IC, separated by a transparent insulation layer. 4. Typical Applications
When a new optocoupler part number like crosses your desk, the datasheet is the only source of truth. Unlike standard jellybean parts (e.g., 4N25), an "A1458" suggests either a proprietary manufacturer code, a high-reliability (Hi-Rel) military/aerospace component, or a specific binning of a common device.
When researching "a1458 optocoupler datasheet", watch for these issues:
| Pin Number | Name | Description | |------------|-------------|------------------------------------| | 1 | Anode (A) | Positive terminal of the IR LED | | 2 | Cathode (C) | Negative terminal of the IR LED | | 3 | Emitter (E) | Output phototransistor emitter | | 4 | Collector (C)| Output phototransistor collector | a1458 optocoupler datasheet
For a practical test, one reliable source describes a functional verification method: "First, apply a positive voltage of about 20V to pins 5 and 8. Then, using a multimeter on the R*1 range, apply current to pins 2 and 3. At this point, pin 6 (VO) will output a voltage of about 3.8V. Without the current, there is no output voltage". This simple test can confirm whether the optocoupler's internal LED and photodetector are functioning correctly.
) : Primary supply voltage input for the integrated output detector chip. Target Industry Applications
Features a blazing-fast typical propagation delay ( Note: Internally, the input consists of a GaAsP
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
voltage spikes across the isolation barrier. Without high CMTI, these transients couple through the internal parasitic capacitance of the optocoupler, inducing false trigs at the output. With a minimum rating of up to 50 kV/µs, the A1458 shields downstream microcontrollers from destructive noise. Primary Engineering Applications
Because of its high speed and robust isolation, the A1458 is a staple in several critical industries: Optocouplers and Opto-Isolators - Broadcom Inc. Unlike standard jellybean parts (e
Top-Down View (DIP-8 / SOP-8) +--- ---+ Anode | 1 8 | VCC (Supply Voltage) Cathode | 2 7 | No Connection (NC) NC | 3 6 | VO (Signal Output) NC | 4 5 | GND (Ground Connection) +-------+
Offers excellent immunity to fast voltage transients (
Designed for industrial applications, it generally operates within a range of 0°C to 70°C. 2. A1458 Pinout Configuration