ISP817XGRSM

Overview

The ISP817XGRSM is a high-speed optocoupler manufactured by Isocom Components. It integrates an AlGaAs infrared LED with a monolithic integrated circuit output containing a photo-Darlington transistor and a Schmitt trigger. This configuration provides noise immunity and clean digital outputs. The device operates within a wide supply voltage range and features a high common-mode rejection ratio, making it suitable for applications requiring reliable signal isolation in noisy environments.

Feature Summary

• Integrates a Schmitt trigger for noise-immune digital switching
• High common-mode rejection ratio for reliable operation in noisy environments
• Monolithic IC output ensures consistent performance and fast propagation delay

Applications

• Industrial process control systems
• Communication equipment requiring signal isolation
• Microprocessor system interfaces

Procurement Notes

Verify the specific suffix GRSM against official Isocom documentation to confirm tape-and-reel packaging and lead-free status. Ensure the ordering part number matches the exact speed grade and package type required for your design. Cross-reference the datasheet revision date to confirm current electrical specifications before finalizing procurement.

Selection Notes

Select this component when high-speed digital isolation with built-in noise filtering is required. The integrated Schmitt trigger eliminates the need for external hysteresis circuits. Consider the propagation delay and rise/fall times if timing constraints are critical. Verify that the input forward current requirements align with your driving logic levels.

Part Context

This part belongs to the ISP817 series of high-speed optocouplers. It is designed as a drop-in replacement for standard 4-pin DIP optocouplers but offers superior speed and noise immunity due to its internal Schmitt trigger and IC output structure. It is distinct from slower phototransistor-only variants.

Replacement Considerations

Check for direct equivalents such as the HCPL-2601 or similar high-speed Schmitt-trigger optocouplers. Verify pinout compatibility and electrical parameter overlap, particularly propagation delay and CTR, before substitution. Ensure the replacement supports the same operating temperature range and isolation voltage ratings.