PCA9675DB,112 Equivalent & Substitute Parts

Part Overview

The PCA9675DB,112 is a 16-bit I/O expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. in a 24-SSOP surface mount package. This component provides remote I/O expansion capabilities with push-pull output configuration and power-on reset functionality. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

PCA9675DB,112

NXP USA Inc.In Stock: 941PCA9675DB,112 Datasheet

Current PartRFQ

PCA9675PW,118

NXP SemiconductorsIn Stock: 6889PCA9675PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9675DB,112 is determined by the following critical parameters:

• I/O Count: 16-bit configuration required for functional equivalence
• Interface Protocol: I2C compatibility mandatory for system integration
• Clock Frequency: 1 MHz operation to maintain timing specifications
• Supply Voltage Range: 2.3V ~ 5.5V compatibility for power distribution
• Operating Temperature Range: -40°C ~ 85°C for environmental consistency
• Output Configuration: Push-pull output type for signal integrity
• Package Compatibility: Physical and electrical compatibility with PCB layout

The PCA9675PW,118 meets all substitution criteria within these parameters while offering active product status and enhanced current sourcing/sinking capabilities.

Parameter Comparison

Engineering Selection Recommendations

The PCA9675PW,118 serves as the primary substitute for the obsolete PCA9675DB,112. Selection is based on the following engineering factors:

Functional Equivalence: Both devices maintain identical I/O count (16-bit), interface protocol (I2C), clock frequency (1 MHz), supply voltage range (2.3V ~ 5.5V), and operating temperature specifications (-40°C ~ 85°C).

Product Status: The PCA9675PW,118 holds active product status with NXP Semiconductors, ensuring continued availability and manufacturing support compared to the obsolete PCA9675DB,112.

Compliance: Both parts maintain RoHS3 compliance, satisfying regulatory requirements for new designs and legacy system support.

Enhanced Performance: The PCA9675PW,118 provides increased output current capability (300µA source, 42mA sink versus 100µA source, 25mA sink), offering improved drive capability for connected loads.

Package Consideration: The PCA9675PW,118 uses 24-TSSOP packaging (0.173", 4.40mm width) versus the original 24-SSOP (0.209", 5.30mm width). PCB layout modification is required for physical substitution.

Frequently Asked Questions (FAQ)

Q: Can the PCA9675PW,118 directly replace the PCA9675DB,112 without PCB modification?

A: Functional substitution is complete; however, package differences require PCB layout changes. The PCA9675PW,118 uses 24-TSSOP packaging while the original uses 24-SSOP. Footprint redesign is necessary for physical implementation.

Q: Are the I2C interface specifications identical between both parts?

A: Both devices operate at 1 MHz I2C clock frequency with identical supply voltage range (2.3V ~ 5.5V) and temperature specifications (-40°C ~ 85°C). The PCA9675PW,118 additionally supports SMBus protocol, providing expanded compatibility.

Q: What is the significance of the increased output current in the PCA9675PW,118?

A: The substitute part provides 300µA source current and 42mA sink current compared to 100µA source and 25mA sink in the original. This enhancement allows direct driving of higher-impedance loads without additional buffering stages.

Q: Is the PCA9675PW,118 suitable for new design implementations?

A: Yes. The active product status, enhanced electrical specifications, and compliance certifications make the PCA9675PW,118 appropriate for new designs requiring 16-bit I2C I/O expansion at 1 MHz operation.

Q: What compliance certifications apply to both parts?

A: Both devices maintain ROHS3 compliance. The PCA9675DB,112 is REACH Unaffected with EAR99 ECCN classification. Verify compliance documentation for the PCA9675PW,118 based on specific application requirements.