PCA9536D I/O Expander 4-Channel I2C/SMBus Interface

Part Overview

The PCA9536D is a 4-channel I/O expander designed for I2C and SMBus communication at 400 kHz clock frequency. This component is classified as Obsolete, which necessitates identification of active substitute parts for new designs and ongoing production requirements. The part operates across a wide supply voltage range of 2.3V to 5.5V and supports push-pull output configuration with 10mA and 25mA source/sink current capabilities.

Substiute Parts

PCA9536D

Texas InstrumentsIn Stock: 25240PCA9536D Datasheet

Current PartRFQ

PCA9536D,118

NXP USA Inc.In Stock: 3412PCA9536D,118 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PCA9536D is determined by strict equivalence across the following critical parameters:

• Base Product Number: Both parts must share the PCA9536 base designation
• Number of I/O Channels: 4 channels required
• Interface Protocol: I2C and SMBus compatibility mandatory
• Clock Frequency: 400 kHz operation
• Output Configuration: Push-Pull output type
• Current Ratings: 10mA and 25mA source/sink capability
• Supply Voltage Range: 2.3V ~ 5.5V
• Operating Temperature: -40°C ~ 85°C
• Package Dimensions: 8-SOIC form factor with 0.154" width (3.90mm)
• Compliance Standards: ROHS3 and REACH requirements

The PCA9536D,118 manufactured by NXP USA Inc. meets all substitution criteria. The primary distinction is product status: the original part is Obsolete while the substitute is Active, making it the appropriate selection for ongoing production and new designs.

Parameter Comparison

Engineering Selection Recommendations

The PCA9536D,118 from NXP USA Inc. is the direct functional equivalent for the obsolete PCA9536D from Texas Instruments. Both parts maintain identical electrical specifications, package geometry, and compliance certifications. The substitute part carries Active product status, ensuring continued availability and manufacturing support. Both components satisfy ROHS3 and REACH regulatory requirements, making them suitable for applications requiring environmental compliance. The identical 8-SOIC package footprint permits direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the PCA9536D,118 be used as a direct replacement for the PCA9536D?

A: Yes. The PCA9536D,118 is electrically and mechanically equivalent. All functional parameters, including I/O count, interface protocols, voltage ratings, current capabilities, and package dimensions are identical. The substitute part is manufactured by NXP USA Inc. and carries Active product status.

Q: Are there any package compatibility concerns?

A: No. Both parts use the 8-SOIC package with identical 0.154" (3.90mm) width specification. PCB footprints and land patterns are interchangeable.

Q: What is the significance of the product status difference?

A: The original PCA9536D is classified as Obsolete, indicating discontinued manufacturing and limited availability. The PCA9536D,118 is Active, ensuring reliable supply chain access and ongoing manufacturer support for new production runs and design implementations.

Q: Are compliance certifications maintained in the substitute part?

A: Yes. The PCA9536D,118 maintains ROHS3 compliance and REACH Unaffected status identical to the original part, satisfying regulatory requirements for both parts.

Q: What are the critical substitution parameters for this component?

A: Substitution is valid when the following parameters remain constant: 4-channel I/O configuration, I2C/SMBus 400 kHz interface, push-pull output type, 10mA/25mA current ratings, 2.3V to 5.5V supply range, -40°C to 85°C operating temperature, and 8-SOIC package form factor.