1458 Optocoupler Datasheet -

If the phototransistor (Pins 4 and 5) is switching an inductive load like a mechanical relay, solenoid, or DC motor, always place a flyback diode (e.g., 1N4007) in parallel with the load to prevent high-voltage inductive spikes from destroying the transistor. De-coupling Capacitors: Place a 0.1

Industrial surroundings generate severe electromagnetic interference (EMI) and fast-switching voltage transients ( 1458 optocoupler datasheet

These parameters represent the predictable performance metrics of the 1458 optocoupler under specific operational windows. Input Characteristics Typical 1.25 V, Maximum 1.65 V ( Reverse Current ( IRcap I sub cap R ): Typical 0.1 µA, Maximum 10 µA ( Junction Capacitance ( CJcap C sub cap J ): Typical 25 pF ( Output Characteristics Collector-Emitter Dark Current ( ICEOcap I sub cap C cap E cap O end-sub ): Typical 1.0 nA, Maximum 100 nA ( Collector-Emitter Breakdown Voltage ( BVCEOcap B cap V sub cap C cap E cap O end-sub ): Minimum 50 V ( Emitter-Collector Breakdown Voltage ( BVECOcap B cap V sub cap E cap C cap O end-sub ): Minimum 7.0 V ( Transfer Characteristics If the phototransistor (Pins 4 and 5) is

Internal isolation spacer; must be left floating on the PCB layout. Optimized for low-power and low-voltage systems, it features

Optimized for low-power and low-voltage systems, it features a wide VCCcap V sub cap C cap C end-sub range of 3.0V to 5.5V.

(Voltage Output Low): The maximum voltage measured at the output pin when the optocoupler is in a logic "LOW" state. VOHcap V sub cap O cap H end-sub

| Pin Number | Function | Description | | :--- | :--- | :--- | | | Anode | Positive side of the internal LED (+) | | Pin 2 | Cathode | Negative side of the internal LED (-) | | Pin 3 | Emitter | Emitter of the phototransistor (usually GND) | | Pin 4 | Collector | Collector of the phototransistor (Output Signal) |

If the phototransistor (Pins 4 and 5) is switching an inductive load like a mechanical relay, solenoid, or DC motor, always place a flyback diode (e.g., 1N4007) in parallel with the load to prevent high-voltage inductive spikes from destroying the transistor. De-coupling Capacitors: Place a 0.1

Industrial surroundings generate severe electromagnetic interference (EMI) and fast-switching voltage transients (

These parameters represent the predictable performance metrics of the 1458 optocoupler under specific operational windows. Input Characteristics Typical 1.25 V, Maximum 1.65 V ( Reverse Current ( IRcap I sub cap R ): Typical 0.1 µA, Maximum 10 µA ( Junction Capacitance ( CJcap C sub cap J ): Typical 25 pF ( Output Characteristics Collector-Emitter Dark Current ( ICEOcap I sub cap C cap E cap O end-sub ): Typical 1.0 nA, Maximum 100 nA ( Collector-Emitter Breakdown Voltage ( BVCEOcap B cap V sub cap C cap E cap O end-sub ): Minimum 50 V ( Emitter-Collector Breakdown Voltage ( BVECOcap B cap V sub cap E cap C cap O end-sub ): Minimum 7.0 V ( Transfer Characteristics

Internal isolation spacer; must be left floating on the PCB layout.

Optimized for low-power and low-voltage systems, it features a wide VCCcap V sub cap C cap C end-sub range of 3.0V to 5.5V.

(Voltage Output Low): The maximum voltage measured at the output pin when the optocoupler is in a logic "LOW" state. VOHcap V sub cap O cap H end-sub

| Pin Number | Function | Description | | :--- | :--- | :--- | | | Anode | Positive side of the internal LED (+) | | Pin 2 | Cathode | Negative side of the internal LED (-) | | Pin 3 | Emitter | Emitter of the phototransistor (usually GND) | | Pin 4 | Collector | Collector of the phototransistor (Output Signal) |