PI7C9X754FFEX Equivalent & Substitute Parts

Part Overview

The PI7C9X754FFEX is an RS485 Controller with IRDA 1.1 UART interface manufactured by Diodes Incorporated. This component functions as a quad UART bridge in an 80-LQFP (12x12mm) package and is classified as obsolete. Due to its obsolete product status, identifying equivalent substitute parts is necessary for ongoing design support, production continuity, and system maintenance where this component is currently deployed.

Substiute Parts

PI7C9X754FFEX

Diodes IncorporatedIn Stock: 1939PI7C9X754FFEX Datasheet

Current PartRFQ

PI7C9X754FCEX

Diodes IncorporatedIn Stock: 716PI7C9X754FCEX Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI7C9X754FFEX is determined by the following critical parameters:

• Base product number (PI7C9X754) ensures functional equivalence at the silicon level
• Protocol (RS485), Function (Controller), and Interface (UART) specifications must remain identical
• Standards compliance (IRDA 1.1) must be maintained
• Electrical specifications: Voltage supply range (1.62V ~ 3.6V) and supply current (10mA) must be compatible
• Operating temperature range (-40°C ~ 85°C) must be supported
• RoHS3 compliance and MSL rating (3) must be equivalent or superior
• Package type may differ (LQFP variants) provided pin count and electrical compatibility are maintained

The PI7C9X754FCEX qualifies as a parametric equivalent based on these criteria, sharing the same base product number, protocol, function, interface, standards, electrical specifications, temperature range, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The PI7C9X754FCEX is a valid parametric equivalent for the PI7C9X754FFEX based on electrical and functional compatibility. Both components share identical protocol, function, interface, standards, voltage supply range, supply current, and operating temperature specifications. Both maintain ROHS3 compliance and equivalent moisture sensitivity ratings.

The primary difference is the package configuration: the substitute uses a 64-LQFP (10x10mm) package versus the original 80-LQFP (12x12mm) package. This package change requires PCB layout modification and must be evaluated for physical fit within the target application.

The PI7C9X754FCEX holds active product status, ensuring ongoing availability and manufacturing support, whereas the original part is obsolete. This status difference supports long-term supply chain continuity for new designs or production restarts.

Frequently Asked Questions (FAQ)

Q: Can the PI7C9X754FCEX directly replace the PI7C9X754FFEX without design changes?

A: Electrical and functional compatibility is confirmed. However, the package difference (64-LQFP versus 80-LQFP) requires PCB layout modification. Pin-to-pin compatibility must be verified against the specific pinout documentation for both variants.

Q: What is the significance of the package size difference?

A: The PI7C9X754FCEX uses a smaller 64-LQFP (10x10mm) package compared to the 80-LQFP (12x12mm) original. This affects PCB footprint, trace routing, and board space allocation. The smaller package may offer space advantages but requires layout redesign.

Q: Why is the original part marked as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. The PI7C9X754FCEX, with active product status, represents the current manufacturing alternative within the same product family.

Q: Are compliance certifications equivalent between the two parts?

A: Both parts maintain ROHS3 compliance and identical moisture sensitivity levels (MSL 3, 168 Hours). Compliance certifications are equivalent.

Q: What electrical parameters must remain compatible for substitution?

A: Voltage supply range (1.62V ~ 3.6V), supply current (10mA), operating temperature range (-40°C ~ 85°C), protocol (RS485), interface (UART), and standards (IRDA 1.1) must all remain identical. Both parts meet these requirements.