PI49FCT3803Q Equivalent & Substitute Parts

Part Overview

The PI49FCT3803Q is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for 1:7 clock distribution at 156 MHz. This component features CMOS/TTL input and output compatibility with a 16-SSOP surface mount package. The product is currently obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

PI49FCT3803Q

Diodes IncorporatedIn Stock: 1137PI49FCT3803Q Datasheet

Current PartRFQ

PI49FCT32803QEX

Diodes IncorporatedIn Stock: 26249PI49FCT32803QEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI49FCT3803Q is determined by the following critical parameters that must remain consistent or compatible:

Mandatory Compatibility Parameters:

• Input:Output Ratio (1:7)
• Package Type (16-SSOP)
• Input/Output Signal Types (CMOS/TTL)
• Mounting Type (Surface Mount)
• Differential Configuration (No/No)

Allowable Variation Parameters:

• Maximum Frequency: Substitute must support the required operating frequency or higher
• Supply Voltage Range: Substitute range must encompass or exceed the original specification
• Operating Temperature Range: Substitute range must encompass or exceed the original specification
• Product Status: Active products are preferred for long-term availability
• Compliance Standards: Enhanced compliance (RoHS3) is acceptable and preferred

The PI49FCT32803QEX qualifies as a direct substitute based on these criteria, maintaining identical functional architecture while offering improved product status and compliance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The PI49FCT32803QEX is the qualified substitute for the obsolete PI49FCT3803Q based on the following engineering criteria:

Product Status Advantage: The substitute is Active, ensuring continued availability and manufacturing support, whereas the original part is Obsolete and subject to supply discontinuation.

Compliance Enhancement: The PI49FCT32803QEX achieves ROHS3 compliance, meeting current regulatory requirements for electronic components in regulated markets. The original part is RoHS non-compliant.

Functional Equivalence: Both parts maintain identical 1:7 fanout buffer architecture, CMOS/TTL signal compatibility, and 16-SSOP package footprint, ensuring direct PCB compatibility without layout modifications.

Operating Range Consideration: The substitute provides an extended operating temperature range (-40°C to 85°C) compared to the original (0°C to 70°C), offering broader environmental applicability. The maximum frequency specification of 133 MHz on the substitute is lower than the original 156 MHz; applications requiring frequencies above 133 MHz must evaluate alternative solutions.

Supply Voltage Compatibility: The substitute supply voltage range (2.97V to 3.63V) encompasses the original specification (3V to 3.6V), ensuring compatibility with existing power distribution designs.

Frequently Asked Questions (FAQ)

Q: Can the PI49FCT32803QEX directly replace the PI49FCT3803Q on existing PCBs?

A: Yes. Both parts use identical 16-SSOP packaging with matching pinout and footprint. No PCB layout modifications are required for physical substitution.

Q: What is the frequency limitation when using the PI49FCT32803QEX?

A: The substitute supports clock frequencies up to 133 MHz. Applications requiring operation above 133 MHz must use the original PI49FCT3803Q or identify alternative clock buffer solutions rated for higher frequencies.

Q: Does the substitute meet current environmental compliance standards?

A: Yes. The PI49FCT32803QEX is ROHS3 compliant, meeting current regulatory requirements. The original PI49FCT3803Q is RoHS non-compliant and may face restrictions in regulated markets.

Q: Are there supply availability differences between these parts?

A: Yes. The PI49FCT3803Q is Obsolete with limited remaining inventory. The PI49FCT32803QEX is Active with significantly higher stock availability (26,200 pcs vs. 1,072 pcs), ensuring reliable long-term procurement.

Q: What is the operating temperature range difference?

A: The original part operates from 0°C to 70°C. The substitute operates from -40°C to 85°C, providing extended temperature capability for applications requiring broader environmental performance.

Q: Is the supply voltage range compatible?

A: Yes. The substitute voltage range (2.97V to 3.63V) fully encompasses the original specification (3V to 3.6V), ensuring compatibility with existing power supplies and voltage regulation circuits.