PCA9545ADGVR Equivalent & Substitute Parts

Part Overview

The PCA9545ADGVR is a translating switch interface IC manufactured by Texas Instruments, designed for I2C and SMBus applications. This 20-TVSOP surface mount device operates across a supply voltage range of 2.3V to 5.5V and is classified as an obsolete product. Due to its discontinued status, identifying functionally compatible substitute components is essential for system redesign, legacy system maintenance, and ensuring continued supply chain availability.

Substiute Parts

PCA9545ADGVR

Texas InstrumentsIn Stock: 3629PCA9545ADGVR Datasheet

Current PartRFQ

ZSSC4161BE2R

Renesas Electronics CorporationIn Stock: 6098ZSSC4161BE2R Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the PCA9545ADGVR is determined by the following critical parameters:

• Interface Protocol Compatibility: Both main and substitute parts must support I2C and/or SMBus communication standards
• Supply Voltage Range: Operating voltage specifications must accommodate the system requirements
• Package Type: Surface mount packages with compatible pin counts and footprints
• Product Status: Active or available substitute parts are prioritized over obsolete alternatives
• Compliance Standards: RoHS3 compliance and REACH status alignment ensure regulatory compatibility
• Moisture Sensitivity: MSL rating must be suitable for manufacturing and storage conditions

The identified substitute ZSSC4161BE2R shares core interface protocol support (I2C) and surface mount technology, though it operates within a narrower voltage range (4.75V ~ 5.25V) and utilizes a different package format (24-QFN).

Parameter Comparison

Engineering Selection Recommendations

The ZSSC4161BE2R qualifies as a functional substitute based on the following criteria:

• Active Product Status: The substitute is currently in active production, ensuring long-term availability and supply chain stability
• Regulatory Compliance: Both components maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements
• Interface Protocol Support: I2C protocol compatibility enables communication with existing system architectures
• Moisture Sensitivity Alignment: Matching MSL ratings (1 - Unlimited) ensure compatible manufacturing and storage conditions
• Surface Mount Technology: Both components utilize surface mount packaging, maintaining PCB assembly compatibility

Design engineers must verify that the narrower supply voltage range (4.75V ~ 5.25V) of the ZSSC4161BE2R aligns with system power specifications, and that the package transition from 20-TFSOP to 24-VFQFN does not introduce layout constraints.

Frequently Asked Questions (FAQ)

Q: Why is the PCA9545ADGVR classified as obsolete? A: The PCA9545ADGVR has reached end-of-life status with Texas Instruments. Obsolete classification indicates the manufacturer no longer produces or supports this component, necessitating alternative solutions for new designs and legacy system updates.

Q: What are the primary differences between the PCA9545ADGVR and ZSSC4161BE2R? A: The primary differences are supply voltage range (PCA9545ADGVR: 2.3V ~ 5.5V versus ZSSC4161BE2R: 4.75V ~ 5.25V), package format (20-TFSOP versus 24-VFQFN), and additional interface protocols supported by the substitute (SENT, ZACwire™). Both components support I2C protocol and maintain equivalent compliance certifications.

Q: Can the ZSSC4161BE2R be used in systems designed for the PCA9545ADGVR? A: Substitution is feasible if system supply voltage operates within the 4.75V ~ 5.25V range and PCB layout accommodates the 24-VFQFN package footprint. Functional verification is required to confirm I2C protocol compatibility with existing firmware and peripheral configurations.

Q: What is the significance of MSL rating 1 (Unlimited)? A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions (23°C, 50% relative humidity). This classification simplifies inventory management and reduces risk of moisture-related failures during manufacturing processes.

Q: Are there any automotive qualifications associated with these components? A: The ZSSC4161BE2R carries AEC-Q100 automotive qualification, indicating suitability for automotive applications. The PCA9545ADGVR does not specify automotive qualification in the provided parameters.