FOD270L

Overview

The FOD270L is a logic output optoisolator featuring a Darlington transistor array with base connection. It provides 5000Vrms isolation voltage between input and output channels. The device operates within a temperature range of -40°C to 85°C. Key electrical characteristics include a maximum power dissipation of 100mW, a reverse breakdown voltage of 5V for the output stage, and a current transfer ratio of 7000%. It is packaged in an 8-DIP (0.300 inch, 7.62mm) configuration.

Feature Summary

• High isolation voltage capability of 5000Vrms
• Darlington output structure with accessible base terminal
• Wide operating temperature range suitable for industrial environments

Applications

• Industrial process control systems
• Power supply feedback loops
• Signal isolation in noisy environments

Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor was acquired by onsemi. Confirm package dimensions match the 8-DIP specification. Check RoHS compliance status for lead-free requirements. Ensure the part number suffix matches the exact variant needed. Validate authenticity through authorized distribution channels.

Selection Notes

Select this component when high isolation voltage is required for logic-level signal transmission. The Darlington configuration offers high current gain but may have slower switching speeds compared to standard transistors. Consider the base connection feature for additional control over saturation. Verify thermal management needs given the 100mW power dissipation limit.

Part Context

This component belongs to the family of logic output optocouplers designed for digital signal isolation. It utilizes an LED input coupled to a Darlington phototransistor output. The technology ensures galvanic isolation while maintaining signal integrity across different voltage domains. It is commonly used where safety standards require robust electrical separation.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing circuit designs before considering alternatives. Check pinout and electrical specifications against potential replacements.