PI49FCT3802LE Equivalent & Substitute Parts

Part Overview

The PI49FCT3802LE is a Clock Fanout Buffer (Distribution) IC manufactured by Diodes Incorporated, designed for clock signal distribution applications requiring a 1:5 output configuration at frequencies up to 156 MHz. This component operates with CMOS/TTL input and output compatibility, housed in a 16-TSSOP surface mount package.

The PI49FCT3802LE is classified as obsolete. Identifying suitable substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and system upgrades.

Substiute Parts

PI49FCT3802LE

Diodes IncorporatedIn Stock: 1789PI49FCT3802LE Datasheet

Current PartRFQ

PI49FCT3803LEX

Diodes IncorporatedIn Stock: 9416PI49FCT3803LEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI49FCT3802LE is determined by the following critical parameters:

• Package Compatibility: 16-TSSOP surface mount package with identical physical dimensions (0.173", 4.40mm Width)
• Electrical Interface: CMOS/TTL input and output logic compatibility
• Supply Voltage Range: 3V ~ 3.6V operation
• Frequency Performance: Maximum frequency capability of 156 MHz or greater
• Environmental Compliance: ROHS3 compliance and MSL rating of 1 or better
• Thermal Range: Operating temperature range of 0°C ~ 70°C or wider

The PI49FCT3803LEX qualifies as a substitute part. While it provides a 1:7 output configuration instead of 1:5, it maintains all critical electrical and mechanical parameters required for functional equivalence in clock distribution applications. The increased output ratio provides additional fanout capability without compromising signal integrity or compatibility with the original design envelope.

Parameter Comparison

Engineering Selection Recommendations

The PI49FCT3803LEX is the designated manufacturer-recommended substitute for the obsolete PI49FCT3802LE. Both components are manufactured by Diodes Incorporated and maintain identical electrical specifications, supply voltage requirements, operating temperature ranges, and package dimensions.

The PI49FCT3803LEX offers the advantage of active product status, ensuring continued availability and manufacturing support. Both parts maintain ROHS3 compliance and MSL rating of 1, meeting environmental and reliability standards for industrial and commercial applications.

The primary design consideration is the increased output fanout ratio (1:7 versus 1:5). Applications requiring exactly five output channels must account for the two additional outputs in the PI49FCT3803LEX. These outputs can be left unconnected or terminated according to system requirements without affecting the performance of the active channels.

Frequently Asked Questions (FAQ)

Q: Can the PI49FCT3803LEX directly replace the PI49FCT3802LE on existing PCBs?

A: Yes. Both components use the identical 16-TSSOP package with matching pin assignments for the first five outputs. The two additional outputs on the PI49FCT3803LEX occupy pins that correspond to no-connect positions on the original design, allowing direct PCB compatibility.

Q: What is the impact of the 1:7 versus 1:5 output ratio on system performance?

A: The output ratio determines the number of clock distribution channels available. The PI49FCT3803LEX provides two additional output channels. If your application requires only five outputs, the extra channels can remain unconnected without degrading signal quality or introducing noise.

Q: Are there any electrical differences between these parts?

A: No. Both components operate at identical supply voltages (3V ~ 3.6V), maximum frequency (156 MHz), and temperature ranges (0°C ~ 70°C). Input and output logic levels are CMOS/TTL compatible on both parts.

Q: Why is the PI49FCT3802LE classified as obsolete?

A: The PI49FCT3802LE has reached end-of-life status with Diodes Incorporated. The PI49FCT3803LEX represents the active product line continuation, offering equivalent functionality with enhanced output capability.

Q: Are both parts RoHS compliant?

A: Yes. Both the PI49FCT3802LE and PI49FCT3803LEX are ROHS3 compliant with MSL rating of 1 (Unlimited), meeting environmental and reliability requirements for industrial applications.

Q: What packaging options are available for the PI49FCT3803LEX?

A: The PI49FCT3803LEX is supplied in Tape & Reel (TR) packaging for automated assembly processes. The component maintains the same 16-TSSOP surface mount package configuration as the original part.