provided by manufacturers like Broadcom (formerly Avago/Agilent). Heisener Electronics or a specific circuit example for this component? MC1458 - STMicroelectronics
Electrical characteristics define how the 1458 optocoupler performs under standard operating conditions. Input Characteristics Test Conditions Forward Voltage VFcap V sub cap F Reverse Current IRcap I sub cap R Capacitance CJcap C sub cap J Output Characteristics Test Conditions Breakdown Voltage (
Optocouplers are the watchdogs of mixed-voltage electronics. Treat them with respect, read their datasheets religiously, and your circuits will remain safe, stable, and silent. Happy isolating.
If this works, your "1458 optocoupler" behaves exactly like a 4N35. 1458 optocoupler datasheet
provides a robust, high-speed, and low-voltage solution for critical signal isolation. Its 50 kV/μs immunity makes it particularly adept at handling electrically noisy environments, while its low power consumption makes it perfect for portable or battery-driven applications. When integrating this component, always refer to the specific Avago/Broadcom datasheet for exact thermal and electrical design margins.
Enhances efficiency by reducing power losses at the output driver stage during low-logic states. Pinout Configuration and Packaging
This comprehensive technical guide serves as an expanded datasheet overview, covering pin configurations, electrical specifications, operational mechanics, and practical circuit designs. 1. Device Overview and Core Architecture If this works, your "1458 optocoupler" behaves exactly
In audio systems or sensor networks, two circuits might have different ground potentials. Connecting them directly burns traces. Placing an optocoupler between the sensor's ground and the microcontroller's ground breaks the loop while passing data.
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| Parameter | Symbol | Rating | Unit | |-----------|--------|--------|------| | Forward Current (LED) | I_F | 60 | mA | | Reverse Voltage (LED) | V_R | 6 | V | | Collector-Emitter Voltage | V_CEO | 30 | V | | Emitter-Collector Voltage | V_ECO | 7 | V | | Power Dissipation (Output) | P_out | 150 | mW | | Total Package Dissipation | P_tot | 250 | mW | | | V_ISO | 5000 | V_RMS | safe operating conditions.
Frequently used to safely step control signals up to the isolated gate driver stages that manipulate IGBTs and Power MOSFETs in power converters.
These values define how the device performs under standard, safe operating conditions. Input Characteristics Typical 1.2 V to 1.4 V ( Reverse Current ( IRcap I sub cap R ): Maximum 10 Capacitance ( CJcap C sub cap J ): Typical 30 pF ( Output Characteristics Collector Dark Current ( ICEOcap I sub cap C cap E cap O end-sub ): Maximum 50 nA ( Collector-Emitter Breakdown Voltage (
When the phototransistor turns off, the inductive coil inside the relay will collapse, producing a high-voltage back-EMF spike. Always place a flyback diode (such as a standard ) in parallel with the relay coil to protect Pin 5 ( VCEOcap V sub cap C cap E cap O end-sub ) from exceeding its 30V limit.