TIL111 Equivalent & Substitute Parts

Part Overview

The TIL111 is a 6-DIP optoisolator with transistor output and base connection, manufactured by onsemi. It provides 5300Vrms isolation with a single channel configuration suitable for DC input applications. The TIL111 is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility across isolation voltage, output characteristics, package form factor, and thermal operating range.

Substiute Parts

TIL111

onsemiIn Stock: 5663TIL111 Datasheet

Current PartRFQ

TIL111M

onsemiIn Stock: 8414TIL111M Datasheet

DirectRFQ

4N25

Texas InstrumentsIn Stock: 384244N25 Datasheet

SimilarRFQ

4N25-000E

Broadcom LimitedIn Stock: 30614N25-000E Datasheet

SimilarRFQ

TIL111

onsemiIn Stock: 5663TIL111 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the TIL111 is determined by the following critical parameters: package compatibility (6-DIP form factor), isolation voltage rating, output stage configuration (transistor with base), single-channel architecture, DC input type, and through-hole mounting. Substitute parts must maintain the same package dimensions and pin configuration to ensure direct board-level replacement without layout modifications.

The isolation voltage represents the maximum voltage differential the optoisolator can withstand between input and output circuits. Substitute parts with equal or higher isolation ratings are electrically compatible. Output voltage and current ratings must support the application requirements. Operating temperature range, forward voltage characteristics, and saturation voltage define the electrical performance envelope for signal transmission and switching applications.

Parameter Comparison

Engineering Selection Recommendations

TIL111M is the direct manufacturer equivalent from onsemi with active product status. It provides higher isolation voltage (7500Vpk versus 5300Vrms), maintains identical output voltage and current ratings, and is ROHS3 compliant. The operating temperature minimum is -40°C compared to -55°C for the original TIL111. This part is recommended for new designs requiring onsemi sourcing and modern compliance certifications.

4N25 from Texas Instruments is an active substitute with 5000Vrms isolation, comparable to the TIL111 isolation rating. It offers higher output voltage capability (70V maximum) and significantly higher output current (50mA versus 2mA). The 4N25 has faster switching characteristics (2µs rise/fall time versus 10µs). This part is suitable for applications requiring higher output drive capability but carries RoHS non-compliance and REACH-affected status.

4N25-000E from Broadcom Limited is an active substitute with lower isolation voltage (2500Vrms). It provides higher output current capability (100mA) and maintains ROHS3 compliance and REACH unaffected status. This part is appropriate for applications with lower isolation voltage requirements and modern regulatory compliance needs.

Selection between substitute parts depends on isolation voltage requirements, output current demands, switching speed requirements, and regulatory compliance mandates for the target application and market.

Frequently Asked Questions (FAQ)

Q: Can TIL111M directly replace TIL111 in existing designs?

A: Yes. TIL111M maintains identical package form factor (6-DIP), pin configuration, and output stage architecture. The higher isolation voltage (7500Vpk) provides enhanced performance margin. Operating temperature minimum differs (-40°C versus -55°C), which must be verified against application requirements.

Q: What are the key differences between TIL111 and 4N25?

A: Both parts share 6-DIP packaging and transistor output configuration. 4N25 provides higher maximum output voltage (70V versus 30V) and significantly higher output current (50mA versus 2mA). 4N25 has faster switching speed (2µs versus 10µs rise/fall time). Isolation voltage ratings are comparable (5000Vrms versus 5300Vrms). 4N25 is RoHS non-compliant while TIL111 status is unspecified.

Q: Is 4N25-000E suitable for high-isolation applications?

A: 4N25-000E has the lowest isolation voltage rating (2500Vrms) among the substitute options. It is suitable only for applications with isolation requirements at or below 2500Vrms. For applications requiring 5000Vrms or higher isolation, TIL111M or 4N25 are appropriate selections.

Q: What compliance certifications should I consider when selecting a substitute?

A: TIL111M and 4N25-000E are ROHS3 compliant. 4N25 is RoHS non-compliant. For REACH compliance, TIL111M and 4N25-000E are REACH unaffected, while 4N25 is REACH affected. Regulatory requirements for the target market and application must determine substitute selection.

Q: Are all substitute parts available in the same packaging options?

A: All substitute parts use 6-DIP (0.300", 7.62mm) package form factor suitable for through-hole mounting. TIL111M is supplied in tube packaging. Packaging format does not affect electrical compatibility or board-level installation.

Q: What output current rating should I use for circuit design?

A: The TIL111 and TIL111M are rated for 2mA output current per channel. The 4N25 provides 50mA output current capability. The 4N25-000E provides 100mA output current capability. Circuit design must account for the specific part selected, as output current ratings differ significantly between options.