PCA9673DB,118 Equivalent & Substitute Parts

Part Overview

The PCA9673DB,118 is a 16-bit I/O Expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. This component is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and ongoing production requirements. The part features push-pull output configuration with interrupt output capability and operates across a wide supply voltage range of 2.3V to 5.5V.

Substiute Parts

PCA9673DB,118

NXP USA Inc.In Stock: 845PCA9673DB,118 Datasheet

Current PartRFQ

PCA9673PW,118

NXP USA Inc.In Stock: 2433PCA9673PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9673DB,118 is based on strict equivalence of the following electrical and mechanical parameters:

• I/O Configuration: 16-bit I/O count
• Communication Protocol: I2C interface at 1 MHz clock frequency
• Electrical Characteristics: Push-pull output type with 100µA/25mA source/sink current capability
• Supply Voltage: 2.3V ~ 5.5V operating range
• Temperature Range: -40°C ~ 85°C
• Interrupt Functionality: Interrupt output present
• Compliance: ROHS3 compliant, MSL Level 1

The primary substitute, PCA9673PW,118, maintains identical electrical specifications and differs only in package form factor and product status classification.

Parameter Comparison

Engineering Selection Recommendations

The PCA9673PW,118 is the direct functional equivalent of the PCA9673DB,118. Both components are manufactured by NXP USA Inc. and maintain identical electrical specifications across all critical parameters including I/O count, interface protocol, supply voltage range, temperature operating range, and output characteristics.

The primary distinction between these parts is packaging format and product lifecycle status. The PCA9673DB,118 utilizes a 24-SSOP package with 5.30mm width, while the PCA9673PW,118 employs a 24-TSSOP package with 4.40mm width. The TSSOP variant offers reduced package footprint.

The PCA9673PW,118 maintains active product status with higher inventory availability (2400 Pcs), whereas the PCA9673DB,118 is classified as obsolete. Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings.

Frequently Asked Questions (FAQ)

Q: Are the PCA9673DB,118 and PCA9673PW,118 electrically interchangeable?

A: Yes. Both components provide identical electrical functionality including 16-bit I/O expansion, I2C communication at 1 MHz, push-pull output configuration, and interrupt output capability. Supply voltage range, operating temperature, and output current specifications are identical.

Q: What is the primary difference between these two parts?

A: The components differ in package form factor. The PCA9673DB,118 uses 24-SSOP packaging (5.30mm width), while the PCA9673PW,118 uses 24-TSSOP packaging (4.40mm width). The TSSOP variant provides a smaller footprint. Both maintain identical pin count and electrical characteristics.

Q: Can I use the PCA9673PW,118 as a direct replacement in existing designs?

A: PCB layout compatibility depends on package footprint differences. The TSSOP package is narrower than SSOP, requiring verification of PCB trace routing and component placement. Electrical functionality and pin assignments are identical, enabling direct functional substitution with appropriate PCB layout modifications.

Q: Why is the PCA9673DB,118 classified as obsolete?

A: Product status reflects NXP's lifecycle management. The PCA9673PW,118 remains in active production with higher inventory availability, making it the recommended selection for new designs and ongoing production.

Q: Are compliance certifications identical between these parts?

A: Yes. Both components maintain ROHS3 compliance, identical moisture sensitivity level (MSL 1 - Unlimited), REACH unaffected status, and matching ECCN and HTSUS classifications.