PI74FCT541ATSE Equivalent & Substitute Parts

Part Overview

The PI74FCT541ATSE is a non-inverting buffer logic integrated circuit manufactured by Diodes Incorporated, designed for 8-bit buffering applications with 3-state output capability. This device operates within a 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC surface mount package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI74FCT541ATSE
Manufacturer	Diodes Incorporated
Logic Type	Buffer, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	15mA, 64mA
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the PI74FCT541ATSE is determined by the following critical parameters:

Electrical Compatibility Requirements:

Logic type: Buffer, Non-Inverting
Number of bits per element: 8
Output type: 3-State
Supply voltage range: 4.75V ~ 5.25V
Package / Case: 20-SOIC (0.295", 7.50mm Width)

Acceptable Variations:

Output current specifications (15mA/64mA or 32mA/64mA or 15mA/12mA)
Operating temperature range (-40°C ~ 85°C or 0°C ~ 70°C)
Base product number (74FCT541 or 74FCT2541)
Packaging format (Tube or Tape & Reel)
Product status (Active substitutes for Obsolete)

All substitute parts listed maintain identical package geometry, pin configuration, and core functional characteristics required for direct replacement in existing designs.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Bits/Element	Output Type	Current High/Low (mA)	Supply Voltage	Temp Range (°C)	Package	Status
PI74FCT541ATSE	Diodes Inc.	Buffer, Non-Inv	8	3-State	15/64	4.75-5.25V	-40 to 85	20-SOIC	Obsolete
CD74FCT541M	Texas Instruments	Buffer, Non-Inv	8	3-State	15/64	4.75-5.25V	0 to 70	20-SOIC	Active
CY74FCT541ATSOC	Texas Instruments	Buffer, Non-Inv	8	3-State	32/64	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT541ATSOCT	Texas Instruments	Buffer, Non-Inv	8	3-State	32/64	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT541CTSOC	Texas Instruments	Buffer, Non-Inv	8	3-State	32/64	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT541CTSOCT	Texas Instruments	Buffer, Non-Inv	8	3-State	32/64	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT541TSOC	Texas Instruments	Buffer, Non-Inv	8	3-State	32/64	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT2541ATSOC	Texas Instruments	Buffer, Non-Inv	8	3-State	15/12	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT2541CTSOC	Texas Instruments	Buffer, Non-Inv	8	3-State	15/12	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT2541TSOCT	Texas Instruments	Buffer, Non-Inv	8	3-State	15/12	4.75-5.25V	-40 to 85	20-SOIC	Active
CY74FCT2541TSOC	Texas Instruments	Buffer, Non-Inv	8	3-State	15/12	4.75-5.25V	-40 to 85	20-SOIC	Active

Engineering Selection Recommendations

Primary Substitute - Exact Electrical Match: CD74FCT541M (Texas Instruments) provides identical output current specifications (15mA/64mA) and maintains the same 4.75V to 5.25V supply voltage range. This part is manufactured by a primary logic IC supplier and carries Active product status. The operating temperature range is narrower (0°C to 70°C versus -40°C to 85°C), which may require thermal evaluation for extended temperature applications.

Extended Temperature Substitutes: CY74FCT541ATSOC, CY74FCT541ATSOCT, CY74FCT541CTSOC, and CY74FCT541CTSOCT maintain the full -40°C to 85°C operating temperature range matching the original part. These variants feature increased output current capability (32mA high, 64mA low) and are available in both Tube and Tape & Reel packaging formats. All are ROHS3 compliant and carry Active product status.

Alternative Base Product Numbers: CY74FCT2541 series parts (ATSOC, CTSOC, TSOCT, TSOC variants) provide functional equivalence with modified output current specifications (15mA/12mA). These maintain the extended temperature range and identical package geometry. Selection depends on output current requirements within the application circuit.

All substitute parts are ROHS3 compliant, MSL Level 1, and REACH unaffected, matching the compliance profile of the original PI74FCT541ATSE.

Frequently Asked Questions (FAQ)

Q: Can I use CD74FCT541M as a direct replacement for PI74FCT541ATSE? A: CD74FCT541M is electrically compatible with identical output current ratings and supply voltage specifications. The operating temperature range is restricted to 0°C to 70°C. If your application operates within this temperature window, this part provides a direct substitute. For extended temperature applications below 0°C or above 70°C, select CY74FCT541 variants instead.

Q: What is the difference between CY74FCT541 and CY74FCT2541 series? A: Both series maintain identical package geometry, pin configuration, and logic function. The primary difference is output current specification: CY74FCT541 variants provide 32mA/64mA, while CY74FCT2541 variants provide 15mA/12mA. Select based on your circuit's output current requirements.

Q: Are Tube and Tape & Reel packaging options functionally equivalent? A: Yes. Tube and Tape & Reel (TR) packaging formats contain identical die and electrical specifications. The difference is mechanical packaging for automated assembly. Tube packaging is suitable for manual or lower-volume assembly; Tape & Reel is optimized for high-speed automated pick-and-place equipment.

Q: Does the PI74FCT541ATSE obsolescence affect long-term availability of substitutes? A: All recommended substitute parts carry Active product status from Texas Instruments, a primary manufacturer in the 74FCT logic family. These parts are actively manufactured and distributed, providing stable long-term availability for new designs and legacy system support.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed maintain ROHS3 compliance, MSL Level 1 moisture sensitivity rating, and REACH unaffected status, matching the environmental and regulatory profile of the original PI74FCT541ATSE.

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