CTR=(ICIF)×100%CTR equals open paren the fraction with numerator cap I sub cap C and denominator cap I sub cap F end-fraction close paren cross 100 % Design Considerations for CTR
ceramic capacitor near the power supply pin of the output receiving circuit to filter out noise caused by fast switching transitions.
The 1458 optocoupler is standardly housed in a . It is also available in surface-mount configurations (SMD) for automated PCB assembly. Pinout Diagram (Top View) 1458 optocoupler datasheet
: Optimized for high-speed and low-voltage operations. Voltage Supply ( VCCcap V sub cap C cap C end-sub
Since obtaining the official PDF might be challenging, the following table compiles the most critical electrical characteristics from various trusted sources. Always verify with the official manufacturer's datasheet for your specific application. Pinout Diagram (Top View) : Optimized for high-speed
Microcontrollers (like Arduino, ESP32, or STM32) operate at 3.3V or 5V and can be easily destroyed by electrical noise from 24V industrial relays or motors. The 1458 isolates the MCU entirely.
+5V (MCU Side) +24V (Load Side) | | [R1] (330 Ohm) [R_Load] | | (Pin 1) Anode (Pin 5) Collector +--------+ +--------+ | \ / | | /| | | \/ | >>> Optical Barrier >>> | / | | | ---- | | \| | +--------+ +--------+ (Pin 2) Cathode (Pin 4) Emitter | | [MCU GPIO Pin] GND (24V Side) Microcontrollers (like Arduino, ESP32, or STM32) operate at
supply range and features a very low threshold input current. This makes it an ideal choice for interfacing logic families (like TTL and CMOS), isolating analog signals, and protecting microprocessors from high-voltage spikes. Key Features
VBR,CEOcap V sub cap B cap R comma cap C cap E cap O end-sub ): Minimum 30 V ( Transfer Characteristics (Current Transfer Ratio - CTR)