PI7C8954AFHE Equivalent & Substitute Parts

Part Overview

The PI7C8954AFHE is a PCI Bridge interface component manufactured by Diodes Incorporated, designed to provide PCI to UART connectivity with quad UART functionality in a 144-LQFP package. This part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations. The obsolete status necessitates evaluation of active alternative components that maintain functional and electrical compatibility within the PCI bridge interface category.

Substiute Parts

PI7C8954AFHE

Diodes IncorporatedIn Stock: 980PI7C8954AFHE Datasheet

Current PartRFQ

PI7C8952AFAE

Diodes IncorporatedIn Stock: 1220PI7C8952AFAE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI7C8954AFHE is determined by the following critical parameters:

• Protocol Compatibility: Both main and substitute parts must support PCI protocol
• Function Type: Both must provide Bridge functionality with PCI to UART conversion capability
• Electrical Specifications: Voltage supply range (3V, 5V) and current supply (10mA) must be maintained
• Operating Temperature: Thermal operating range of -40°C ~ 85°C must be supported
• Compliance Standards: RoHS3 compliance and REACH unaffected status must be preserved
• Environmental Classification: Moisture Sensitivity Level 3 (168 Hours) must be matched

The PI7C8952AFAE qualifies as a substitute based on matching all critical electrical, thermal, and compliance parameters. The primary difference is the reduction in UART channel count (dual versus quad) and package footprint (100-TQFP versus 144-LQFP), which represents a functional simplification rather than a compatibility limitation for applications requiring dual UART bridging.

Parameter Comparison

Engineering Selection Recommendations

The PI7C8952AFAE is the qualified substitute for the obsolete PI7C8954AFHE based on the following engineering criteria:

Product Status Alignment: The PI7C8952AFAE maintains active product status with Diodes Incorporated, ensuring continued availability and manufacturing support compared to the obsolete PI7C8954AFHE.

Compliance Preservation: Both components maintain identical RoHS3 compliance, REACH unaffected status, and EAR99 export classification, ensuring regulatory requirements are satisfied in replacement applications.

Electrical and Thermal Equivalence: Matching voltage supply ranges (3V, 5V), current supply specifications (10mA), and operating temperature ranges (-40°C ~ 85°C) confirm functional electrical compatibility.

Functional Capability: The PI7C8952AFAE provides dual UART bridging functionality through PCI protocol, suitable for applications where quad UART capacity is not required. System designs requiring quad UART functionality must evaluate alternative components outside this substitution group.

Package Consideration: The transition from 144-LQFP to 100-TQFP represents a reduction in pin count and physical footprint. PCB layout modifications are required for implementation.

Frequently Asked Questions (FAQ)

Q: Can the PI7C8952AFAE directly replace the PI7C8954AFHE in existing designs?

A: Direct pin-for-pin replacement is not possible due to different package types (144-LQFP versus 100-TQFP) and pin counts. PCB redesign is required. The PI7C8952AFAE is functionally compatible for applications requiring dual UART bridging but not quad UART functionality.

Q: What is the primary functional difference between these components?

A: The PI7C8954AFHE provides quad UART channels, while the PI7C8952AFAE provides dual UART channels. Both maintain identical PCI bridge protocol support and electrical specifications.

Q: Are there compliance or certification differences between the substitute and main part?

A: No. Both components maintain ROHS3 compliance, REACH unaffected status, and EAR99 classification. Moisture sensitivity levels are identical at MSL 3 (168 Hours).

Q: What design considerations apply when transitioning to the PI7C8952AFAE?

A: PCB layout must accommodate the smaller 100-TQFP (14x14) package versus the 144-LQFP (20x20) footprint. System firmware or driver software must be evaluated to confirm compatibility with dual UART functionality if the original design utilized all four UART channels.

Q: Is the PI7C8952AFAE suitable for new designs?

A: Yes. The active product status and full compliance certifications make the PI7C8952AFAE appropriate for new design implementations requiring PCI to dual UART bridging functionality.