) : Operates between , making it compatible with both 3.3V and 5V logic .
This simple mechanism creates an electrical barrier. The input side controls the output side via light, not copper. Therefore, there is no direct electrical connection between your high-voltage side and your low-voltage logic.
Parameter / Feature | Standard A1458 | HCPL-1458 | HCNW1458 :--- | :--- | :--- | :--- | Approx. 100% | Higher than A1458 | Excellent (high gain) Response Speed | Slower (basic) | Faster than A1458 (high-speed logic output) | Very fast (high-speed) Isolation | Standard | Standard | Superior (high-voltage, extended creepage) Common Mode Transient Immunity | Good | Good | Excellent (up to 15kV/μs min) Number of Channels | Single-channel | Single-channel | Dual-channel Operating Temperature | -40°C to +100°C (Standard) | 0°C to 70°C (Guaranteed) | -40°C to +100°C (Wider range) Key Applications | General purpose (LED, relay control) | Switch-mode power supply feedback, digital signal isolation | High-speed data communication, motor drives, automotive a1458 optocoupler datasheet
The A1458 is most commonly found in a or an SMD equivalent. Pin 1: Anode (LED Input) Pin 2: Cathode (LED Input) Pin 3: Emitter (Phototransistor Output) Pin 4: Collector (Phototransistor Output)
This section is crucial for reliable circuit operation. It gives the voltage, current, and temperature ranges where the device's performance is guaranteed. ) : Operates between , making it compatible with both 3
(minimum) immunity, protecting against high voltage transients in industrial environments. Guaranteed isolation (for 1 minute) ensures safe operation. Low Power Consumption: Operates at low current ( Wide Supply Voltage Range: Compatible with
Protecting telephone lines and modem interfaces from lightning strikes or power surges. Design Tips: Working with the A1458 Therefore, there is no direct electrical connection between
): Typical 1.5 mA to 2.5 mA depending on the output logic state. Switching Performance (High-Speed Dynamics) Maximum 0.8 Propagation Delay to Logic High ( tPLHt sub cap P cap L cap H end-sub ): Maximum 0.8 Common Mode Transient Immunity (CMR): Typically
, allowing it to interface seamlessly with various logic levels, including TTL and CMOS. Reliable Isolation : Provides a safety-critical insulation voltage of 3750 Vrms to 5000 Vrms
) of 1,500 V, neutralizing high-frequency background electromagnetic noise. Supply Voltage ( VCCcap V sub cap C cap C end-sub
) of , keeping signal distortion negligible. Supply Voltage Range ( VCCcap V sub cap C cap C end-sub