PCA9674ATS,118 Equivalent & Substitute Parts

Part Overview

The PCA9674ATS,118 is an 8-bit I/O Expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. in a 20-SSOP surface mount package. This component is classified as Obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations. The part provides push-pull output configuration with integrated power-on reset (POR) functionality, suitable for applications requiring expanded I/O capabilities over I2C communication protocols.

Substiute Parts

PCA9674ATS,118

NXP USA Inc.In Stock: 1093PCA9674ATS,118 Datasheet

Current PartRFQ

PCA9674APW,118

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9674ATS,118 is determined by strict equivalence across the following critical parameters:

• I/O Configuration: 8-bit I/O expander functionality
• Communication Protocol: I2C interface at 1 MHz clock frequency
• Electrical Characteristics: Push-pull output type with 100µA source and 25mA sink current capability
• Supply Voltage Range: 2.3V to 5.5V operation
• Temperature Range: -40°C to 85°C operating window
• Compliance Standards: ROHS3 compliance and REACH unaffected status
• Manufacturer: NXP USA Inc.

The PCA9674APW,118 meets all functional and electrical requirements for direct substitution. Package differences (20-SSOP versus 16-TSSOP) represent the primary distinction, requiring PCB layout evaluation for mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The PCA9674APW,118 is the direct functional equivalent for the obsolete PCA9674ATS,118. Selection of this substitute is supported by:

• Product Status Advantage: The substitute maintains Active product status, ensuring long-term availability and manufacturer support compared to the Obsolete main part.
• Compliance Continuity: Both parts maintain identical ROHS3 compliance and REACH unaffected status, preserving regulatory requirements.
• Electrical Equivalence: All functional parameters—I/O count, interface protocol, output characteristics, supply voltage, and temperature range—are identical.
• Package Consideration: The transition from 20-SSOP to 16-TSSOP packaging requires PCB layout modification. Pin count reduction from 20 to 16 indicates different pinout; physical footprint compatibility cannot be assumed without detailed datasheet cross-reference.

Frequently Asked Questions (FAQ)

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

A: No. The package change from 20-SSOP to 16-TSSOP indicates a different pin configuration. PCB layout modification is required. Consult the NXP datasheets for both parts to confirm pinout compatibility before implementation.

Q: Are the electrical specifications identical between these parts?

A: Yes. Both parts provide 8-bit I/O expansion over I2C at 1 MHz, identical push-pull output characteristics, matching supply voltage range (2.3V–5.5V), and identical operating temperature range (-40°C to 85°C).

Q: Why is the main part listed as Obsolete?

A: The PCA9674ATS,118 has reached end-of-life status with NXP USA Inc. The PCA9674APW,118 remains in Active production, making it the recommended choice for new designs and ongoing system support.

Q: What is the difference between the packaging formats?

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

Q: Are compliance certifications maintained with the substitute?

A: Yes. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications requiring these certifications.