ISP321-4XBLSM

Transistor, Photovoltaic Output Optoisolators Overview

The ISP321-4XBLSM is a high-density, surface-mount optically coupled isolator manufactured by Isocom Components. It integrates four independent channels within a single 16-pin SMD package, utilizing infrared LEDs and NPN silicon phototransistors for signal transmission. The device provides robust electrical isolation with a minimum isolation voltage of 5300 Vrms. Key performance specifications include a maximum forward voltage of 1.4V, a typical rise time of 4µs, and a typical fall time of 3µs. It supports a maximum input current of 50 mA and offers a wide current transfer ratio range from 200% to 600%, ensuring reliable data isolation in compact electronic designs.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates four independent optical channels in a single compact surface-mount package
• Provides high-voltage electrical isolation between input and output circuits
• Utilizes NPN silicon phototransistor outputs for digital signal switching
• Designed for high-density mounting applications requiring multiple isolated signals

Transistor, Photovoltaic Output Optoisolators Applications

• High-density multi-channel signal isolation in industrial control systems
• Data communication interfaces requiring galvanic separation
• Power supply feedback loops with multiple isolated sensing points
• Microcontroller I/O expansion with electrical noise immunity

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'BLSM' against the manufacturer's latest datasheet to confirm pinout compatibility and tape-and-reel packaging requirements. Ensure that the 16-pin gull-wing package dimensions match your PCB footprint exactly. Confirm that the 5300 Vrms isolation rating meets your system's safety standards. Cross-reference the current transfer ratio specifications with your circuit design margins to guarantee proper logic level translation under all operating conditions.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when multiple isolated channels are required in a space-constrained environment. The 16-pin SMD form factor reduces board area compared to discrete solutions. Verify that the NPN transistor output configuration aligns with your load requirements. Consider the 5300 Vrms isolation barrier for high-noise environments. Ensure the 50 mA maximum input current capability suits your driving source limitations.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the ISP321 series of high-density optocouplers from Isocom Components. The series includes variants like ISP321-1, ISP321-2, and ISP321-4, differing primarily in channel count and pin configurations. The ISP321-4XBLSM specifically denotes the four-channel version in a surface-mount package. These devices are designed to replace traditional DIP optocouplers in modern automated manufacturing processes where space efficiency is critical.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Parametric equivalents may be available from other manufacturers offering similar 16-pin quad-channel optocouplers. Verify that any substitute matches the 5300 Vrms isolation voltage and NPN output type. Check for identical pin assignments to ensure direct replacement without PCB redesign. Confirm that the replacement part meets the same thermal and mechanical specifications for surface-mount assembly.