PCA9671DB,112 Equivalent & Substitute Parts

Part Overview

The PCA9671DB,112 is a 16-channel I/O Expander with I2C interface operating at 1 MHz, manufactured by NXP USA Inc. in a 24-SSOP surface mount package. This component is classified as Obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. The part provides push-pull output configuration with POR (Power-On Reset) feature, supporting supply voltages from 2.3V to 5.5V across an operating temperature range of -40°C to 85°C.

Substiute Parts

PCA9671DB,112

NXP USA Inc.In Stock: 708PCA9671DB,112 Datasheet

Current PartRFQ

PCA9671PW,118

NXP USA Inc.In Stock: 6105PCA9671PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9671DB,112 is determined by strict equivalence across the following critical parameters:

• Functional Equivalence: 16-channel I/O configuration with I2C interface at 1 MHz
• Electrical Compatibility: Push-pull output type, 100µA/25mA source/sink current, 2.3V–5.5V supply voltage range
• Thermal Compatibility: -40°C to 85°C operating temperature range
• Regulatory Compliance: ROHS3 compliance, REACH unaffected status, EAR99 classification
• Packaging Compatibility: Surface mount technology with specified package dimensions

The PCA9671PW,118 qualifies as a direct substitute based on identical electrical specifications and functional parameters, with the primary distinction being package form factor (24-TSSOP vs. 24-SSOP) and product status transition from Obsolete to Active.

Parameter Comparison

Engineering Selection Recommendations

The PCA9671PW,118 is the manufacturer-recommended substitute for the obsolete PCA9671DB,112. Both parts maintain identical electrical and functional specifications, ensuring direct functional compatibility in I2C-based I/O expansion applications.

Key Considerations:

• Package Transition: The substitute uses 24-TSSOP packaging (4.40mm width) versus the original 24-SSOP (5.30mm width). PCB layout and footprint modifications are required.
• Product Status: The substitute is Active status, ensuring long-term availability and manufacturing support compared to the Obsolete original.
• Compliance: Both parts maintain ROHS3 compliance and identical regulatory certifications (REACH unaffected, EAR99 classification).
• Inventory: The substitute has significantly higher stock availability (6017 pcs vs. 694 pcs), supporting production continuity.

Frequently Asked Questions (FAQ)

Q: Can PCA9671PW,118 be used as a direct pin-for-pin replacement?

A: The parts share identical pin configurations and electrical specifications. However, the package form factor differs (24-TSSOP vs. 24-SSOP), requiring PCB footprint redesign. Electrical functionality is fully compatible.

Q: What is the difference between 24-SSOP and 24-TSSOP packages?

A: Both are 24-pin surface mount packages with identical pin pitch and electrical characteristics. The primary difference is body width: SSOP is 5.30mm wide, while TSSOP is 4.40mm wide. TSSOP is a thinner variant. PCB layout and component placement must accommodate the different package dimensions.

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

A: No. Both parts provide identical I/O count (16), interface protocol (I2C 1 MHz), output characteristics (push-pull, 100µA/25mA), supply voltage range (2.3V–5.5V), and operating temperature range (-40°C to 85°C).

Q: Why is the original part marked Obsolete?

A: The PCA9671DB,112 has been discontinued by the manufacturer. The PCA9671PW,118 represents the active production equivalent, ensuring continued availability and manufacturing support.

Q: Are moisture sensitivity levels identical?

A: Yes. Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: What compliance certifications apply to the substitute?

A: The PCA9671PW,118 maintains ROHS3 compliance, REACH unaffected status, and EAR99 export classification, matching the original part's regulatory profile.