1458 Optocoupler — Datasheet

R1=VCC−VFIF=5V−1.2V0.010A=380 Ωcap R sub 1 equals the fraction with numerator cap V sub cap C cap C end-sub minus cap V sub cap F and denominator cap I sub cap F end-fraction equals the fraction with numerator 5 V minus 1.2 V and denominator 0.010 A end-fraction equals 380 space cap omega Using a standard, readily available resistor value, a is ideal. Circuit 2: Modifying Switching Speed using Pin 6 (Base)

An optocoupler (also known as an optoisolator) combines an optical emitter and an optical detector within a single light-tight package. In the 1458 architecture:

Assume a mistaken desire to use a "1458 optocoupler" – instead, we select the .

) as close to the package as possible to filter out high-frequency noise from the detector stage power supply. 7. Conclusion 1458 optocoupler datasheet

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The component is primarily housed in a standard package or a hermetic DIP-8 variant for high-reliability systems. The layout minimizes cross-talk while separating the input (emitter) and output (detector) pins: Pin Number Description Pin 1 Input LED Positive Terminal Pin 2 Input LED Negative Terminal Pin 3 No Connection (internal isolation space) Pin 4 No Connection or optional photodetector base Pin 5 Ground connection for the output stage detector Pin 6 VOUTcap V sub cap O cap U cap T end-sub

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. R1=VCC−VFIF=5V−1

) Range: Supports an operational layout from , making it fully compatible with standard 3.3V and 5V digital logic devices.

: Used for signal switching and motor control.

If your "1458 optocoupler" has a VCEO lower than 30V, it is not suitable for motor drives. If it is higher (e.g., 70V), it is likely a high-voltage variant like the 4N36. ) as close to the package as possible

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 %

| Application | Recommended Part | Key Feature | |-------------|------------------|--------------| | General purpose, low speed | 4N35, PC817 | Cheap, CTR ≥ 100% | | High CTR (> 500%) | CNY17-4 | Can be driven from µA currents | | High speed (1 Mbit/s) | 6N137 | Logic output, t_pd < 100 ns | | Dual channel, high voltage | HCPL-2531 | Two independent optocouplers | | Zero-crossing SSR trigger | MOC3063 | Triac driver output |

Because the 1458 contains two independent channels in an 8-pin footprint, Channel 1 can be used for the Transmit (TX) line, while Channel 2 handles the Receive (RX) line. This achieves full-duplex isolated serial communication using a single IC chip, saving massive board space. 6. Layout and PCB Design Guidelines