PCA9675D,118 Equivalent & Substitute Parts

Part Overview

The PCA9675D,118 is a 16-bit I/O expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. in a 24-SOIC 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 interrupt capability and operates across a 2.3V to 5.5V supply range, suitable for industrial and commercial applications requiring expanded I/O capabilities.

Substiute Parts

PCA9675D,118

NXP USA Inc.In Stock: 1142PCA9675D,118 Datasheet

Current PartRFQ

PCA9675PW,118

NXP SemiconductorsIn Stock: 6889PCA9675PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9675D,118 is determined by the following critical parameters:

• I/O Count: 16-bit configuration required
• Interface Protocol: I2C compatibility mandatory
• Clock Frequency: 1 MHz operation
• Supply Voltage Range: 2.3V ~ 5.5V compatibility
• Operating Temperature Range: -40°C ~ 85°C
• Output Configuration: Push-Pull output type
• Interrupt Capability: Interrupt output required
• Regulatory Compliance: RoHS3 compliance

The PCA9675PW,118 meets all substitution criteria as an active product from NXP Semiconductors with identical functional specifications and enhanced electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The PCA9675PW,118 is the direct functional equivalent for the obsolete PCA9675D,118. Both parts are manufactured by NXP and maintain identical core specifications for I/O count, interface protocol, clock frequency, supply voltage range, and operating temperature range.

The substitute part offers improved electrical performance with higher output current capabilities (300µA source, 42mA sink versus 100µA source, 25mA sink), providing enhanced drive capability for connected loads. The PCA9675PW,118 maintains active product status, ensuring long-term availability and supply chain continuity.

Package transition from 24-SOIC to 24-TSSOP requires PCB layout modification. The TSSOP package provides reduced footprint dimensions (0.173" versus 0.295" width), which may necessitate design revision for existing board layouts. Pin configuration and functional pinout remain compatible between packages.

Frequently Asked Questions (FAQ)

Q: Can the PCA9675PW,118 directly replace the PCA9675D,118 without design changes?

A: Functional replacement is direct. Pin configuration and electrical interface are identical. PCB layout modification is required due to package type change from 24-SOIC to 24-TSSOP.

Q: What are the key differences between these parts?

A: The substitute part offers higher output current capability (300µA/42mA versus 100µA/25mA), SMBus protocol support in addition to I2C, and active product status. Package footprint dimensions differ, requiring layout redesign.

Q: Is the PCA9675PW,118 compatible with existing firmware and software?

A: Yes. Both parts implement identical I2C protocol and register architecture. Firmware and software require no modification for functional operation.

Q: What is the impact of the package change from SOIC to TSSOP?

A: TSSOP provides smaller footprint (0.173" width versus 0.295"). PCB routing, component placement, and thermal considerations may require adjustment. Pin pitch and functional pinout remain compatible.

Q: Are there supply chain advantages to using the substitute part?

A: The PCA9675PW,118 maintains active product status with higher inventory availability compared to the obsolete PCA9675D,118, ensuring reliable long-term sourcing.