TLP127(NS-TPL,F) Equivalent & Substitute Parts

Part Overview

The TLP127(NS-TPL,F) is a photocoupler optoisolator with Darlington output manufactured by Toshiba Semiconductor and Storage. This component provides galvanic isolation up to 2500Vrms with a single channel configuration in a 6-MFSOP surface mount package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

TLP127(NS-TPL,F)

Toshiba Semiconductor and StorageIn Stock: 1178TLP127(NS-TPL,F) Datasheet

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TLP187(TPL,E

Toshiba Semiconductor and StorageIn Stock: 2269TLP187(TPL,E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the TLP127(NS-TPL,F) is determined by the following critical parameters:

• Isolation Voltage: Minimum 2500Vrms (equal or higher acceptable)
• Output Configuration: Darlington output topology required
• Number of Channels: Single channel (1 channel)
• Current Transfer Ratio: Minimum 1000% @ 1mA
• Maximum Output Voltage: 300V or higher
• Output Current Capability: 150mA or higher per channel
• Switching Characteristics: Turn-on/turn-off times of 50µs/15µs or faster
• Mounting Type: Surface mount only
• Input Type: DC input

The TLP187(TPL,E) meets all substitution criteria with enhanced isolation voltage rating and extended operating temperature range, while maintaining identical electrical performance characteristics for the output stage.

Parameter Comparison

Engineering Selection Recommendations

The TLP187(TPL,E) serves as a direct functional substitute for the obsolete TLP127(NS-TPL,F) based on the following engineering criteria:

Electrical Equivalence: All critical electrical parameters match or exceed the original specification. The TLP187 provides identical current transfer ratio, output voltage capability, output current rating, and switching characteristics. The enhanced isolation voltage (3750Vrms vs. 2500Vrms) provides additional safety margin without affecting circuit operation.

Product Status: The TLP187 is classified as active with current manufacturing availability, addressing the obsolescence status of the TLP127. This ensures long-term supply chain continuity and support.

Compliance: The TLP187 is ROHS3 compliant and REACH unaffected, meeting modern regulatory requirements. The original TLP127 compliance status is not specified.

Package Consideration: The TLP187 uses a 6-SOIC package versus the TLP127's 6-MFSOP package. While both are 4-lead surface mount configurations, the footprint differs. PCB layout modification is required for implementation.

Temperature Range: The TLP187 extends the maximum operating temperature to 110°C, providing enhanced thermal margin compared to the TLP127's 100°C limit.

Frequently Asked Questions (FAQ)

Q: Can the TLP187(TPL,E) directly replace the TLP127(NS-TPL,F) without circuit modification?

A: The TLP187 is electrically equivalent and will function identically in the circuit. However, the package footprint differs (6-SOIC vs. 6-MFSOP), requiring PCB layout changes. No schematic modifications are necessary.

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

A: The TLP187's 3750Vrms isolation rating exceeds the TLP127's 2500Vrms specification. This provides additional safety margin and is fully compatible with applications designed for the lower rating. No derating is required.

Q: Are the switching characteristics identical between these parts?

A: Yes. Both parts specify identical turn-on/turn-off times (50µs, 15µs) and rise/fall times (40µs, 15µs), ensuring equivalent performance in timing-critical applications.

Q: Does the extended operating temperature range of the TLP187 affect compatibility?

A: No. The TLP187's extended range (-55°C to 110°C) is a superset of the TLP127's range (-55°C to 100°C). Applications operating within the original temperature limits will function identically.

Q: What are the package differences and their implications?

A: The TLP127 uses a 6-MFSOP (4 Lead) gull wing package, while the TLP187 uses a 6-SOIC (0.173", 4.40mm Width) package. Both are surface mount with 4 leads, but the physical dimensions and pad layouts differ. PCB redesign is required for footprint compatibility.

Q: Is the TLP187 suitable for new designs?

A: Yes. The TLP187 is an active product with current manufacturing status and ROHS3 compliance, making it appropriate for new design implementations where the TLP127 is no longer available.