TLP127(ITO-TPR,F) Equivalent & Substitute Parts

Part Overview

The TLP127(ITO-TPR,F) is a single-channel optoisolator with Darlington output manufactured by Toshiba Semiconductor and Storage. This component provides 2500Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

TLP127(ITO-TPR,F)

Toshiba Semiconductor and StorageIn Stock: 992TLP127(ITO-TPR,F) Datasheet

Current PartRFQ

TLP187(TPR,E

Toshiba Semiconductor and StorageIn Stock: 3734TLP187(TPR,E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the TLP127(ITO-TPR,F) is determined by the following critical parameters:

• Number of Channels: Must be 1 channel
• Output Type: Must be Darlington output
• Current Transfer Ratio (Min): Must be 1000% @ 1mA or higher
• Voltage - Output (Max): Must be 300V or greater
• Current - Output / Channel: Must be 150mA or greater
• Input Type: Must be DC
• Mounting Type: Must be Surface Mount

The TLP187(TPR,E) qualifies as a direct substitute based on matching all critical electrical parameters. While the isolation voltage is higher (3750Vrms vs 2500Vrms) and the operating temperature range is extended (-55°C ~ 110°C vs -55°C ~ 100°C), these represent improvements that maintain full backward compatibility. The package form factor differs (6-SOP vs 6-MFSOP), requiring PCB layout verification.

Parameter Comparison

Engineering Selection Recommendations

The TLP187(TPR,E) is the qualified substitute for the obsolete TLP127(ITO-TPR,F). Selection is supported by:

• Product Status: TLP187 is active and in production, ensuring long-term availability and supply chain stability
• Compliance: TLP187 is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements
• Electrical Compatibility: All critical electrical parameters match or exceed the original specification
• Package Consideration: The transition from 6-MFSOP to 6-SOP requires PCB footprint modification and revalidation of board layout

Frequently Asked Questions (FAQ)

Q: Can TLP187(TPR,E) be used as a direct pin-for-pin replacement for TLP127(ITO-TPR,F)?

A: Electrical parameters are compatible. However, the package form factor differs (6-SOP vs 6-MFSOP), requiring PCB footprint redesign. Pin configuration must be verified against both datasheets before implementation.

Q: What is the significance of the higher isolation voltage in TLP187?

A: The TLP187 provides 3750Vrms isolation compared to 2500Vrms in the TLP127. This represents an improvement that maintains full backward compatibility for applications designed to the original specification.

Q: Are there differences in thermal performance between these parts?

A: The TLP187 supports an extended operating temperature range (-55°C ~ 110°C vs -55°C ~ 100°C). Both parts have identical MSL ratings of 1 (Unlimited).

Q: What packaging considerations apply to this substitution?

A: The TLP127 uses 6-MFSOP (4 Lead) gull wing packaging, while the TLP187 uses 6-SOP (0.173", 4.40mm Width) packaging. PCB layout and reflow profile validation are required.

Q: Is the forward voltage difference significant?

A: The TLP187 has a typical forward voltage of 1.25V compared to 1.15V in the TLP127. This 0.1V difference should be evaluated in input circuit design to ensure adequate LED drive current.