4N25TVM

Overview

The Fairchild Semiconductor 4N25TVM is a single-channel transistor output optocoupler housed in a surface-mount 6-DIP package. It features an NPN phototransistor output with a maximum collector-emitter voltage of 30 V and a peak forward current rating of 80 mA. The device provides electrical isolation with a rated insulation voltage of 4170 Vrms. Key switching parameters include a typical rise time of 3 µs and fall time of 3 µs, with a minimum current transfer ratio of 20%. Power dissipation is rated at 270 mW, and the unit operates within a temperature range of -55°C to +100°C.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits via an internal LED and phototransistor pair.
• Features a standard NPN phototransistor output configuration suitable for interfacing with digital logic and microprocessor inputs.
• Designed for surface-mount assembly using a compact 6-DIP footprint to facilitate automated PCB placement.

Applications

• Power supply regulators
• Digital logic circuit isolation
• Microprocessor input/output interfacing

Procurement Notes

Verify component authenticity by checking manufacturer markings against official datasheet specifications. Confirm the specific suffix 'TVM' corresponds to the tape-and-reel packaging variant rather than bulk or tube formats. Ensure that the sourcing channel provides traceable documentation to guarantee compliance with RoHS standards and operational reliability requirements.

Selection Notes

Select this component when surface-mount technology is required for general-purpose signal isolation. Compare the 30 V collector-emitter voltage limit against load requirements. Evaluate the 4170 Vrms isolation rating against system safety standards. Consider the 3 µs switching speed for timing-sensitive applications compared to faster alternatives if necessary.

Part Context

This part belongs to the widely utilized 4N25 family of general-purpose optocouplers. The 4N25 series serves as a foundational component for galvanic isolation in industrial and consumer electronics. The 'TVM' designation specifically identifies the surface-mount version produced by Fairchild Semiconductor, distinguishing it from through-hole variants like the 4N25TM.

Replacement Considerations

Cross-reference with Vishay 4N25-X007T or Broadcom 4N25-300E for equivalent functionality. Verify pinout compatibility and package dimensions before substitution. Check if alternative manufacturers offer updated insulation ratings or switching speeds that may impact circuit performance.