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Alternative part analysis

PCA9509PDP,118 LTB replacements and cross reference

Compare mapped pin-to-pin replacement options for PCA9509PDP,118, review cross-reference notes, and verify the engineering fit before approval.

Compare PCA9509PDP,118 vs PI6ULS5V9509UEX and review the mapped replacement relationship here.

Compare PCA9509PDP,118 against mapped replacement options
Review package, lifecycle, stock, and MOQ in one view
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Back to product detail pageBrowse NXP SemiconductorsSee Interface - Signal Buffers, Repeaters, Splitters category

PCA9509PDP,118 cross reference and alternatives

PCA9509PDP,118 vs PI6ULS5V9509UEX: replacement comparison

Start with the best mapped replacement options for PCA9509PDP,118, including pin-to-pin, functional, and cross-reference alternatives. Review the overview and core specifications, then submit an RFQ when the fit looks right.

P2P

PCA9509PDP,118 vs PI6ULS5V9509UEX

Diodes Incorporated

Distributor-listed direct I2C bus-buffer option for PCA9509PDP,118. Validate package and analog bus behavior.

PI6ULS5V9509UEX is mapped as a possible replacement for PCA9509PDP,118. Verify package, lifecycle, stock, datasheet, and key attributes before approval.

Manufacturer
Diodes Incorporated
Package
8-MSOP
Series
PI6ULS5V9509
Category
Integrated Circuits (ICs)
Stock
30,000
Available
20,000
Min Order
1
Datasheet
Available
Key Attributes: -

Matches

  • Category: Integrated Circuits (ICs)
  • Subcategory: Interface - Signal Buffers, Repeaters, Splitters
  • Channels: 2
  • Applications: I2C bus buffering

Differences

  • Package: 8-TSSOP vs 8-MSOP
  • Series: PCA9509 vs PI6ULS5V9509
  • Function: I2C bus buffer / repeater vs I2C bus buffer / level translator
  • Manufacturer: NXP USA Inc. vs Diodes Incorporated

Must verify

  • Confirm package dimensions, footprint, and mounting details.
  • Confirm the complete pinout; a mapped pin-to-pin relationship is not final approval.
  • Check electrical limits and test conditions in both manufacturer datasheets.
  • Confirm qualification, compliance, and internal approval requirements.

Other replacement comparisons for PCA9509PDP,118

Functional

PCA9509PDP,118 vs P82B715DR

Texas Instruments

Functional I2C bus-extension alternative when the design can absorb bus-level changes.

P82B715DR is mapped as a possible replacement for PCA9509PDP,118. Verify package, lifecycle, stock, datasheet, and key attributes before approval.

Manufacturer
Texas Instruments
Package
8-SOIC
Series
P82B715
Category
Integrated Circuits (ICs)
Stock
30,000
Available
20,000
Min Order
1
Datasheet
Available
Key Attributes: -

Matches

  • Category: Integrated Circuits (ICs)
  • Subcategory: Interface - Signal Buffers, Repeaters, Splitters

Differences

  • Package: 8-TSSOP vs 8-SOIC
  • Series: PCA9509 vs P82B715
  • Function: I2C bus buffer / repeater vs I2C bus extender
  • Manufacturer: NXP USA Inc. vs Texas Instruments

Must verify

  • Confirm package dimensions, footprint, and mounting details.
  • Confirm functional behavior and application-level compatibility.
  • Check electrical limits and test conditions in both manufacturer datasheets.
  • Confirm qualification, compliance, and internal approval requirements.

Specification view

Parameter Comparison Chart

A side-by-side view of the source part and its mapped alternatives so buyers and engineers can screen package, availability, lifecycle, and key descriptors before RFQ.

Swipe or scroll horizontally to compare more part numbers

The left column stays visible so buyers can keep the spec label in view while scanning multiple alternatives.

Parameter Comparison Chart
Current partLTB
PCA9509PDP,118

NXP Semiconductors

P2P
PI6ULS5V9509UEX

Diodes Incorporated

Functional
P82B715DR

Texas Instruments

Part NumberPCA9509PDP,118PI6ULS5V9509UEXP82B715DR
ManufacturerNXP SemiconductorsDiodes IncorporatedTexas Instruments
CategoryIntegrated Circuits (ICs)Integrated Circuits (ICs)Integrated Circuits (ICs)
SubcategoryInterface - Signal Buffers, Repeaters, SplittersInterface - Signal Buffers, Repeaters, SplittersInterface - Signal Buffers, Repeaters, Splitters
Package8-TSSOP8-MSOP8-SOIC
SeriesPCA9509PI6ULS5V9509P82B715
Key Attributes---
Description2-channel I2C bus buffer / level translator in 8-TSSOP, listed by NXP for 2026 last-time buy.Dual bidirectional I2C bus buffer / level translator used as direct replacement candidate.I2C bus extender in 8-SOIC used as a functional alternative for bus-buffer redesigns.
LifecycleLTB--
Stock20,00030,00030,000
Available12,00020,00020,000
Min Order111
DatasheetAvailableAvailableAvailable
Channels22-
FunctionI2C bus buffer / repeaterI2C bus buffer / level translatorI2C bus extender
ManufacturerNXP USA Inc.Diodes IncorporatedTexas Instruments
Lifecycle StatusEOL / Last Time Buy--
Package / Case8-TSSOP8-MSOP8-SOIC
Replacement PathPI6ULS5V9509UEX P2P; P82B715DR functional--
ApplicationsI2C bus bufferingI2C bus bufferingI2C bus extension
Data Rate400 kHz400 kHz-
Supply Voltage3.0 V to 5.5 V5 V tolerant class-
Replacement Role-P2P / direct candidateFunctional alternative
Package--SOIC-8
Application Note--Requires bus-level validation
Interface--I2C
Actions

Cross-reference FAQ

Replacement Part Questions

Short answers for teams reviewing PCA9509PDP,118 replacement and equivalent-part options.

What is a cross-reference page for PCA9509PDP,118?

This page groups mapped replacement options for PCA9509PDP,118 so buyers and engineers can compare alternatives before requesting a quote or approving a substitute.

Does a mapped alternative mean a guaranteed drop-in replacement for PCA9509PDP,118?

Not automatically. Cross-reference mapping helps shortlist candidates, but package, electrical behavior, qualification scope, and approval rules still need to be checked before release.

Which parameters should teams compare first for PCA9509PDP,118 alternatives?

Start with package, series, key attributes, lifecycle status, stock position, datasheet access, and the mapped pin-to-pin or cross-reference note. Then confirm application-specific requirements in the datasheet and RFQ stage.

Can I request a quote for an alternative to PCA9509PDP,118?

Yes. Use the product links or RFQ actions on this page to request pricing, availability, documentation, and sourcing support for any listed alternative part.

Is PCA9509PDP,118 obsolete, and what replacement should buyers review first?

Check the lifecycle row on this page first. If buyers need a fast starting point, the strongest mapped replacement currently surfaced here is PI6ULS5V9509UEX, followed by the other alternatives shown in the comparison table.

Is PI6ULS5V9509UEX a replacement for PCA9509PDP,118?

PI6ULS5V9509UEX is mapped as a P2P option for PCA9509PDP,118, not as an automatically approved drop-in replacement. Compare package, pinout, electrical limits, lifecycle, and qualification requirements before release.

Engineering support

Need help validating the replacement path?

If your team is unsure whether a mapped alternative to PCA9509PDP,118 from NXP Semiconductors is really usable, contact us for help on package fit, pin compatibility, key parameter gaps, and qualification-facing review questions.

Contact a hardware engineer

Email our engineering support contact at [email protected], or use the contact page if the question should be routed across sourcing, engineering, and support.

Package and pin compatibility

Review whether the alternate path looks credible from package, footprint, and pin-level perspectives.

Parameter and function gaps

Surface the electrical, interface, or application-fit questions that still need confirmation before approval.

Qualification and approval prep

Organize the documentation, datasheet evidence, and validation checkpoints your internal team may still require.