PCA9536YZPR Equivalent & Substitute Parts

Part Overview

The PCA9536YZPR is a 4-channel I/O expander designed for I2C and SMBus communication at 400 kHz, packaged in an 8-DSBGA (1.9x0.9mm) surface mount configuration. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The functional architecture and electrical specifications remain consistent across qualified substitute parts, enabling direct functional replacement within compatible system designs.

Substiute Parts

PCA9536YZPR

Texas InstrumentsIn Stock: 985PCA9536YZPR Datasheet

Current PartRFQ

PCA9536DGKR

Texas InstrumentsIn Stock: 17629PCA9536DGKR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9536YZPR is determined by strict equivalence across the following electrical and mechanical parameters:

• Functional Architecture: 4-channel I/O expander with identical I2C/SMBus interface and 400 kHz clock frequency
• Electrical Specifications: Matching voltage supply range (2.3V ~ 5.5V), output current capabilities (10mA, 25mA), and operating temperature range (-40°C ~ 85°C)
• Output Configuration: Push-Pull output type with Power-On Reset feature
• Compliance & Certifications: ROHS3 compliance, REACH unaffected status, and MSL 1 rating
• Manufacturer Consistency: Texas Instruments as original manufacturer ensures design continuity and documentation alignment

The PCA9536DGKR qualifies as a direct functional equivalent based on identical electrical performance and feature set. The primary distinction is packaging format: the substitute part utilizes 8-VSSOP (Very Small Shrink Outline Package) instead of the original 8-DSBGA format, with corresponding differences in physical dimensions and land pattern requirements.

Parameter Comparison

Engineering Selection Recommendations

The PCA9536DGKR is the qualified active substitute for the obsolete PCA9536YZPR. Selection of this substitute is supported by:

• Product Status Alignment: The substitute maintains active production status, ensuring long-term availability and supply chain continuity
• Electrical Equivalence: All functional parameters, voltage specifications, current ratings, and temperature operating ranges are identical
• Compliance Maintenance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for new designs
• Manufacturer Continuity: Texas Instruments maintains consistent design documentation and technical support across both part numbers

The primary design consideration is PCB layout modification to accommodate the 8-VSSOP package footprint in place of the original 8-DSBGA format. This substitution is suitable for new production designs, redesigns of existing products, and end-of-life mitigation strategies for systems currently utilizing the PCA9536YZPR.

Frequently Asked Questions (FAQ)

Q: Can the PCA9536DGKR be used as a direct pin-for-pin replacement?

A: The PCA9536DGKR provides functional equivalence with identical electrical performance and pin assignment. However, the 8-VSSOP package has different physical dimensions and land pattern compared to the 8-DSBGA package. PCB layout redesign is required; direct soldering into existing 8-DSBGA footprints is not possible.

Q: Are there any electrical performance differences between the two parts?

A: No. Both parts share identical specifications for voltage supply range (2.3V ~ 5.5V), output current capabilities (10mA, 25mA), clock frequency (400 kHz), and operating temperature range (-40°C ~ 85°C).

Q: Why is the original PCA9536YZPR classified as obsolete?

A: The PCA9536YZPR is obsolete due to manufacturer discontinuation. The PCA9536DGKR represents the active production equivalent, ensuring continued availability and support for I/O expansion applications requiring 4-channel I2C/SMBus interface functionality.

Q: What are the key differences in packaging between these parts?

A: The PCA9536YZPR uses 8-DSBGA (1.9x0.9mm) packaging, while the PCA9536DGKR uses 8-VSSOP packaging. The VSSOP format provides a larger footprint suitable for standard PCB assembly processes, whereas DSBGA is a ball grid array with smaller pitch.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the PCA9536YZPR and PCA9536DGKR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic components.

Q: What is the moisture sensitivity level for these parts?

A: Both parts have MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions during storage and handling.