ELW2611

Logic Output Optoisolators Overview

The ELW2611 is a high-speed logic output optocoupler manufactured by Everlight Electronics Co Ltd. It integrates a GaAsP infrared emitting diode with an integrated high-gain photodetector IC featuring a Schottky-clamped open-collector transistor output. The device provides electrical isolation of 5000Vrms and supports data rates up to 10Mbps. Key electrical parameters include a typical forward voltage of 1.4V, maximum DC forward current of 50mA, and a supply voltage rating of 7V. Propagation delay is specified at a maximum of 100ns for both low-to-high and high-to-low transitions. Common mode transient immunity is rated at a minimum of 20kV/μs. The operating temperature range spans from -40°C to +85°C.

Logic Output Optoisolators Feature Summary

• Integrates a GaAsP LED with a high-gain photodetector IC for enhanced signal transmission.
• Features a Schottky-clamped open-collector output compatible with LVTTL and LVCMOS logic families.
• Provides robust common mode transient immunity to prevent false triggering in noisy environments.

Logic Output Optoisolators Applications

• High-speed digital communication interfaces requiring galvanic isolation
• Industrial control systems with noise-sensitive logic circuits
• Microprocessor-based systems needing reliable signal transfer across isolated boundaries

Logic Output Optoisolators Procurement Notes

Verify the specific ordering suffix (such as TA or TB) against the manufacturer's official documentation to confirm the exact package variant, such as standard DIP-8 or wide-body configurations. Ensure that the selected part number matches the required lead time and availability status for production schedules. Cross-reference the datasheet revision date to confirm compliance with current safety standards and RoHS directives before finalizing procurement orders.

Logic Output Optoisolators Selection Notes

Select this component when designing circuits that demand high-speed data isolation exceeding standard transistor-output optocouplers. The open-collector output requires appropriate pull-up resistor configuration to interface correctly with downstream logic levels. Consider the 5000Vrms isolation rating for applications involving significant potential differences between input and output grounds. Evaluate the 20kV/μs CMTI specification for environments with rapid voltage transients to ensure system stability.

Logic Output Optoisolators Part Context

The ELW2611 belongs to Everlight's family of high-speed logic optocouplers designed for modern digital isolation needs. Unlike traditional discrete phototransistor devices, this component incorporates integrated circuitry to achieve faster switching speeds and higher gain. It serves as a bridge between low-voltage logic domains and higher-voltage industrial or power sections, ensuring signal integrity while maintaining strict electrical separation.

Logic Output Optoisolators Replacement Considerations

Direct replacements may include other high-speed logic optocouplers with similar pinouts and isolation ratings. Verify compatibility regarding propagation delay, CMTI, and output drive capability. Ensure substitute parts maintain the same LVTTL/LVCMOS compatibility and package dimensions to fit existing PCB footprints without modification.

Logic Output Optoisolators FAQ

What is the maximum data rate supported by the ELW2611?

The ELW2611 supports a maximum data rate of 10Mbps.

How does the ELW2611 handle common mode noise?

It offers a minimum common mode transient immunity (CMTI) of 20kV/μs, making it resistant to fast voltage spikes on the isolation boundary.

Is the output of the ELW2611 push-pull or open-collector?

The output is an open-collector Schottky-clamped transistor, which requires an external pull-up resistor for proper operation.