1458 Optocoupler Datasheet [exclusive]

Exceeding I_F = 60mA degrades the LED. The isolation voltage (5 kV_RMS) is the primary advantage over non-isolated solutions.

The PC1458 is an optically coupled isolator consisting of a Gallium Arsenide (GaAs) infrared emitting diode (IRED) optically coupled to a silicon phototransistor detector. It is housed in a standard 4-pin DIP (Dual In-line Package).

Your targeted or switching frequency. The voltage levels you need to isolate. 1458 optocoupler datasheet

: Available in an 8-pin hermetically sealed package (SOP-8 or similar), protecting internal components from environmental factors. Electrical Specifications Typical/Max Value Forward Current ( IFcap I sub cap F ) 20 mA (Max) Output Current ( ICcap I sub cap C ) Operating Temperature -55°C to +100°C Propagation Delay 35 ns at 10 kHz Common Applications

Have you used this component in a project? Are you having trouble identifying a specific marking? Drop a comment below with a photo or description! Exceeding I_F = 60mA degrades the LED

| Parameter | Symbol | Conditions | Min | Typ | Max | Unit | |-----------|--------|------------|-----|-----|-----|------| | Current Transfer Ratio (CTR) | CTR | ( I_F = 5 mA, V_CE = 5 V ) | 50 | 300 | 600 | % | | Collector-emitter saturation | ( V_CE(sat) ) | ( I_F = 10 mA, I_C = 2 mA ) | - | 0.2 | 0.4 | V | | Isolation resistance | ( R_ISO ) | ( V_IO = 500 V ) | ( 10^11 ) | - | - | Ω | | Isolation capacitance | ( C_ISO ) | ( V_IO = 0, f = 1 MHz ) | - | 1 | - | pF |

In isolated DC-DC converters, the 1458 is frequently placed in the feedback loop alongside a shunt regulator (like the TL431). It passes error voltage signals across the barrier to the PWM controller on the primary high-voltage side without compromising isolation integrity. Best Practices for PCB Layout To maintain the 5300 VRMScap V sub cap R cap M cap S end-sub It is housed in a standard 4-pin DIP (Dual In-line Package)

Drawing not to scale. Typical dimensions:

The datasheet for the 1458 series of optocouplers is a complete technical manual that, when understood, becomes a powerful design tool. By systematically working through the sections—starting with features, moving to pinout, then to absolute maximum and electrical specifications—you can confidently integrate this versatile component into your projects and ensure both robust performance and safety.

Exceeding the maximum limitations designated by the manufacturer can lead to permanent silicon degradation. Circuit designers should look for verified parts on platforms like Mouser Electronics or Farnell to cross-verify the specific breakdown voltages matching their region's electrical compliance codes. Input LED Specifications (Emitter) : Max continuous (Pulse limits can handle up to Reverse Input Voltage ( VRcap V sub cap R ) : Max absolute limit. Forward Voltage Drop ( VFcap V sub cap F ) : Typically at an input of Output Detector Specifications (Receiver) Supply Voltage ( VCCcap V sub cap C cap C end-sub ) : Recommended range between

The 1458 optocoupler datasheet provides a comprehensive overview of the device's features, specifications, and applications. By understanding the device's performance and characteristics, designers and engineers can develop applications that utilize the 1458 optocoupler to provide high voltage insulation and efficient signal transfer. Whether you're designing a power supply, motor control circuit, or industrial automation system, the 1458 optocoupler datasheet is an essential resource that can help you get the job done.