PI49FCT20803LEX Equivalent & Substitute Parts

Part Overview

The PI49FCT20803LEX is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for clock signal distribution applications requiring a 1:7 output configuration at frequencies up to 150 MHz. This component operates with CMOS/TTL input and output compatibility, housed in a 16-TSSOP surface mount package.

The PI49FCT20803LEX is classified as obsolete. Identifying suitable substitute components is necessary to maintain design continuity and ensure availability for new production runs or system updates.

Substiute Parts

PI49FCT20803LEX

Diodes IncorporatedIn Stock: 16102PI49FCT20803LEX Datasheet

Current PartRFQ

PI49FCT20802LEX

Diodes IncorporatedIn Stock: 20732PI49FCT20802LEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI49FCT20803LEX is determined by the following critical parameters:

• Manufacturer & Series: Parts must originate from Diodes Incorporated within the 49FCT series to ensure electrical and thermal compatibility
• Package Type: Identical 16-TSSOP (0.173", 4.40mm Width) surface mount package required for PCB layout compatibility
• Input/Output Compatibility: CMOS/TTL input and output support must be maintained
• Frequency Rating: Maximum frequency of 150 MHz or higher
• Supply Voltage: 2.3V ~ 2.7V operating range
• Operating Temperature: -40°C ~ 85°C range
• Compliance: ROHS3 compliance and MSL Level 1 required

The PI49FCT20802LEX qualifies as a substitute based on these parameters. The primary functional difference is the output ratio configuration (1:5 versus 1:7), which represents a reduction in the number of output buffers while maintaining all other electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The PI49FCT20802LEX is available as an active product from Diodes Incorporated, whereas the PI49FCT20803LEX is obsolete. Both components maintain ROHS3 compliance and MSL Level 1 certification, ensuring equivalent environmental and regulatory standing.

Selection between these parts depends on circuit requirements for the number of output buffers. The PI49FCT20802LEX provides five output buffers instead of seven. If the application requires exactly seven buffered outputs, alternative solutions outside the 49FCT series may be necessary. If five outputs satisfy the design requirements, the PI49FCT20802LEX offers the advantage of active product status and continued manufacturer support.

Frequently Asked Questions (FAQ)

Q: Can the PI49FCT20802LEX directly replace the PI49FCT20803LEX in existing designs?

A: Direct replacement is possible only if the circuit design requires five or fewer buffered clock outputs. The PI49FCT20802LEX provides a 1:5 output ratio compared to the 1:7 ratio of the PI49FCT20803LEX. If all seven outputs are utilized in the original design, functional modification is required.

Q: Are the package dimensions identical between these parts?

A: Yes. Both components use the 16-TSSOP (0.173", 4.40mm Width) surface mount package, ensuring identical PCB footprint and layout compatibility.

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

A: The PI49FCT20803LEX is obsolete, meaning Diodes Incorporated no longer manufactures or supports this component. The PI49FCT20802LEX maintains active status, ensuring continued availability, technical support, and compliance with current manufacturing standards.

Q: Do these parts have identical electrical specifications?

A: Both components share identical frequency ratings (150 MHz maximum), supply voltage range (2.3V ~ 2.7V), operating temperature range (-40°C ~ 85°C), and input/output logic compatibility (CMOS/TTL). The only functional difference is the output buffer count.

Q: Are both parts RoHS compliant?

A: Yes. Both the PI49FCT20803LEX and PI49FCT20802LEX are ROHS3 compliant with MSL Level 1 rating, meeting equivalent environmental and regulatory requirements.