PCA9701D,112 Equivalent & Substitute Parts

Part Overview

The PCA9701D,112 is a 16-channel input-only I/O expander with SPI serial interface operating at 5 MHz. Manufactured by NXP USA Inc., this component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The part is housed in a 24-SOIC package and operates across a supply voltage range of 2.5V to 5.5V with an operating temperature range of -40°C to 125°C.

Substiute Parts

PCA9701D,112

NXP USA Inc.In Stock: 1020PCA9701D,112 Datasheet

Current PartRFQ

PCA9701PW,118

NXP SemiconductorsIn Stock: 2168PCA9701PW,118 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9701D,112 is determined by strict equivalence across the following critical parameters:

• Number of I/O channels: 16 (Input Only)
• Interface protocol: SPI Serial
• Clock frequency: 5 MHz
• Supply voltage range: 2.5V ~ 5.5V
• Operating temperature range: -40°C ~ 125°C
• Interrupt output capability: Yes
• Output type: Push-Pull
• RoHS and REACH compliance status

The PCA9701PW,118 meets all functional and electrical requirements for direct substitution. The primary difference is the package format: the substitute uses 24-TSSOP (0.173", 4.40mm Width) instead of 24-SOIC, requiring PCB layout modification but maintaining identical electrical performance and pin functionality.

Parameter Comparison

Engineering Selection Recommendations

The PCA9701PW,118 is the direct functional equivalent for the obsolete PCA9701D,112. Both parts maintain identical electrical specifications, interface protocols, and performance characteristics across all operating conditions. The substitute part carries Active product status, ensuring long-term availability and supply chain continuity.

Selection of the PCA9701PW,118 requires PCB redesign to accommodate the 24-TSSOP package footprint, which is narrower (4.40mm) than the original 24-SOIC (7.50mm). Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, eliminating compliance-related constraints in the substitution decision.

The substitute part is supplied in Tape & Reel format, suitable for automated assembly processes, whereas the original part was supplied in tube packaging.

Frequently Asked Questions (FAQ)

Q: Can the PCA9701PW,118 be used as a direct pin-for-pin replacement?

A: The PCA9701PW,118 is functionally equivalent but not pin-compatible due to package format differences. The 24-TSSOP package has different physical dimensions and pin spacing compared to the 24-SOIC package. PCB layout modification is required.

Q: Are there electrical performance differences between the main part and substitute?

A: No. Both parts operate identically across all specified electrical parameters: 16 input-only I/O channels, 5 MHz SPI serial interface, 2.5V to 5.5V supply voltage range, and -40°C to 125°C operating temperature.

Q: What is the primary reason for substitution?

A: The PCA9701D,112 is classified as obsolete. The PCA9701PW,118 is an active product from the same manufacturer with identical functionality, ensuring continued availability and support.

Q: Are compliance certifications maintained with the substitute part?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity levels (MSL 1 - Unlimited).

Q: What packaging considerations apply to the substitute part?

A: The PCA9701PW,118 is supplied in Tape & Reel format, optimized for automated assembly. The original part was supplied in tube packaging. Tape & Reel format is standard for high-volume production environments.