Internally, the A1458 consists of:
Lists agency certifications such as UL, CSA, VDE, which are critical for products requiring regulatory compliance.
Minimum 50 kV/µs transient immunity, allowing the device to clean up signal lines in highly polluted electromagnetic environments. Isolation Voltage ( VISOcap V sub cap I cap S cap O end-sub a1458 optocoupler datasheet
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
: Reliable feedback path isolation in switch-mode power supplies (SMPS). Data Communication It is designed to bridge the gap between
Usually Pins 2 (Anode) and 3 (Cathode) for the GaAsP LED. Output Side: Pins 5 (GND), 6 ( VOUTcap V sub cap O cap U cap T end-sub ), and 8 ( VCCcap V sub cap C cap C end-sub
) : Certified protection between 3750 Vrms to 5300 Vrms depending on the exact housing variant. Output Side: Pins 5 (GND), 6 ( VOUTcap
Based on standard optocoupler architecture (an infrared LED optically coupled to a phototransistor), the A1458 datasheet should prioritize these parameters:
| Parameter | Typical Expected Value | Why It Matters | | :--- | :--- | :--- | | | 3,750 Vrms – 5,000 Vrms | Safety compliance (UL, VDE). For A1458, check if it meets reinforced insulation. | | Current Transfer Ratio (CTR) | 50% – 600% (depending on bin) | The gain of the coupler. Low CTR (<50%) indicates an old or slow device. | | Rise/Fall Time (tr/tf) | 2 – 18 µs | Determines max switching speed (typically < 100 kHz for standard types). | | Input Forward Current (IF) | 50 mA (max) / 10 mA (typical) | Prevents burning out the internal LED. |