Microcontroller → 220Ω → A1458 Pin 1 (Anode) Pin 2 (Cathode) → GND Pin 4 (Collector) → VCC (5V) via 10kΩ pull-up Pin 3 (Emitter) → GND Output taken from Collector → Next stage
| Parameter | Symbol | Min | Typ | Max | Unit | Test Conditions | | :--- | :---: | :---: | :---: | :---: | :---: | :--- | | | CTR | 50% | - | 600% | - | $I_F=5mA, V_CE=5V$ | | Collector-Emitter Saturation Voltage | $V_CE(sat)$ | - | 0.1 | 0.2 | V | $ A1458 Optocoupler Datasheet
(often listed as HCPL-A1458 ) is a high-speed, logic-gate optocoupler manufactured by Microcontroller → 220Ω → A1458 Pin 1 (Anode)
: The device is optimized for low output saturation voltage and low leakage current to maintain clear logic levels. A1458 Optocoupler Datasheet