PCA9674TS,112 Equivalent & Substitute Parts

Part Overview

The PCA9674TS,112 is an 8-bit I/O expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. in a 20-SSOP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part provides push-pull output configuration with interrupt output capability and operates across a wide supply voltage range of 2.3V to 5.5V.

Substiute Parts

PCA9674TS,112

NXP USA Inc.In Stock: 695PCA9674TS,112 Datasheet

Current PartRFQ

PCA9674APW,118

NXP USA Inc.In Stock: 54576PCA9674APW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9674TS,112 is determined by the following critical parameters that must remain constant:

• I/O Count: 8 bits (functional requirement)
• Interface Protocol: I2C at 1 MHz (communication standard)
• Output Configuration: Push-Pull with 100µA/25mA source/sink capability (electrical interface)
• Supply Voltage Range: 2.3V ~ 5.5V (power compatibility)
• Operating Temperature: -40°C ~ 85°C (environmental specification)
• Interrupt Output: Present (functional feature)
• Regulatory Compliance: ROHS3, REACH Unaffected, EAR99 (legal/compliance requirement)

The PCA9674APW,118 qualifies as a direct substitute based on matching all critical electrical and functional parameters. The primary difference is the package type: the substitute uses 16-TSSOP instead of 20-SSOP, which represents a physical footprint change requiring PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

The PCA9674APW,118 is the manufacturer-recommended substitute for the obsolete PCA9674TS,112. Selection of this substitute is justified on the following engineering grounds:

Product Status: The original part is obsolete, making the active substitute necessary for continued component availability and production support.

Electrical Equivalence: All functional and electrical parameters are identical, including I/O count, interface protocol, output characteristics, supply voltage range, and operating temperature specifications.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications subject to environmental restrictions.

Physical Consideration: The package change from 20-LSSOP to 16-TSSOP requires PCB layout redesign. The identical body width (0.173", 4.40mm) simplifies mechanical integration, though pin count reduction from 20 to 16 necessitates schematic and layout verification.

Availability: The substitute part maintains active production status with significantly higher inventory levels (54,466 units versus 658 units), ensuring long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the PCA9674APW,118 be used as a direct pin-for-pin replacement?

A: No. The PCA9674APW,118 uses a 16-pin TSSOP package compared to the 20-pin LSSOP package of the original part. Pin assignments differ, requiring schematic and PCB layout modifications. Consult the respective datasheets for detailed pinout information before implementation.

Q: What is the primary reason for substitution?

A: The PCA9674TS,112 is classified as obsolete. The PCA9674APW,118 is the active equivalent from the same manufacturer with identical electrical specifications, ensuring functional compatibility in new designs.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts provide identical I/O count (8 bits), interface protocol (I2C 1 MHz), output configuration (push-pull), current ratings (100µA/25mA), supply voltage range (2.3V ~ 5.5V), and operating temperature range (-40°C ~ 85°C).

Q: Does the package change affect compliance certifications?

A: No. Both parts maintain identical ROHS3 compliance and REACH unaffected status. Regulatory requirements are not affected by the package format change.

Q: What is the difference between the packaging formats?

A: The original part is supplied in bulk packaging, while the substitute is supplied in Tape & Reel (TR) format. This affects handling and automated assembly processes but does not impact component functionality.

Q: Is the substitute part currently available?

A: Yes. The PCA9674APW,118 is in active production with 54,466 units in stock, compared to the obsolete status of the original part with limited remaining inventory.