74HCT541N,652 Equivalent & Substitute Parts

Part Overview

The 74HCT541N,652 is a non-inverting buffer logic IC manufactured by NXP USA Inc., designed for 8-bit buffering applications with 3-state output capability. This component operates at 4.5V to 5.5V supply voltage and is housed in a 20-DIP through-hole package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance, repairs, and legacy design support.

Key Parameters

Parameter	Value
Manufacturer Part Number	74HCT541N,652
Manufacturer	NXP USA Inc.
Logic Type	Buffer, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	6mA, 6mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Through Hole
Package / Case	20-DIP (0.300", 7.62mm)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 74HCT541N,652 is determined by the following critical parameters:

Logic Function: Buffer, Non-Inverting with 1 Element and 8 Bits per Element
Output Configuration: 3-State output
Electrical Performance: 6mA output current (high and low), 4.5V to 5.5V supply voltage
Package Compatibility: 20-DIP form factor for through-hole mounting
Base Product Number: 74HCT541 series

Substitute parts are grouped into two categories based on package type:

Through-Hole DIP Substitutes: Direct pin-compatible replacements in 20-DIP or 20-PDIP packages
Surface-Mount Substitutes: Functionally equivalent parts in alternative package formats (20-SO/SOIC)

All substitute parts maintain the core 74HCT541 logic function and electrical specifications, ensuring functional equivalence within the specified parameter ranges.

Parameter Comparison

Parameter	74HCT541N,652 (NXP)	CD74HCT541E (Harris)	74HCT541D,652 (Nexperia)	SN74HCT541N (TI)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	6mA, 6mA	6mA, 6mA	6mA, 6mA	6mA, 6mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole	Surface Mount	Through Hole
Package / Case	20-DIP	20-DIP	20-SOIC	20-DIP
Product Status	Obsolete	Obsolete	Obsolete	Active
RoHS Status	ROHS3 Compliant	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Through-Hole Replacement (Pin-Compatible)

The SN74HCT541N manufactured by Texas Instruments is the preferred substitute for the 74HCT541N,652. This part maintains identical 20-DIP package geometry, matching pin configuration for direct board-level substitution. The SN74HCT541N holds Active product status, ensuring continued availability and supply chain reliability. Both parts are ROHS3 compliant. The operating temperature range of the SN74HCT541N (-40°C to 85°C) is narrower than the original part (-40°C to 125°C), which must be evaluated against application requirements.

The CD74HCT541E from Harris Corporation provides an alternative through-hole substitute in 20-PDIP package format. However, this part carries RoHS non-compliant status and obsolete product status, limiting its suitability for new designs or regulated applications.

For Surface-Mount Applications

The 74HCT541D,652 from Nexperia USA Inc. offers functional equivalence in a 20-SOIC surface-mount package. This substitution requires PCB redesign and is suitable only when surface-mount technology is the target assembly method. The part maintains ROHS3 compliance and -40°C to 125°C operating temperature range matching the original specification.

Frequently Asked Questions (FAQ)

Q: Can the SN74HCT541N directly replace the 74HCT541N,652 on an existing PCB?

A: Yes. Both parts use identical 20-DIP through-hole package geometry with matching pin assignments. Direct board-level substitution is possible without PCB modification.

Q: What is the difference between the CD74HCT541E and SN74HCT541N substitutes?

A: Both are through-hole 20-DIP packages with identical logic function and electrical specifications. The primary differences are manufacturer (Harris vs. Texas Instruments), product status (both obsolete vs. active), and RoHS compliance (non-compliant vs. ROHS3 compliant). The SN74HCT541N is preferred due to active status and compliance certification.

Q: Why does the SN74HCT541N have a narrower operating temperature range?

A: The SN74HCT541N operates from -40°C to 85°C, compared to the original part's -40°C to 125°C range. This specification difference reflects Texas Instruments' product characterization. Applications requiring operation above 85°C must evaluate alternative substitutes or confirm compatibility through thermal testing.

Q: Can the 74HCT541D,652 be used as a substitute if my application uses surface-mount assembly?

A: Yes. The 74HCT541D,652 provides functional equivalence in a 20-SOIC surface-mount package. This substitution requires PCB redesign and is applicable only to new designs or rework scenarios where surface-mount conversion is planned.

Q: Are all substitute parts RoHS compliant?

A: No. The CD74HCT541E is RoHS non-compliant. The SN74HCT541N and 74HCT541D,652 are both ROHS3 compliant. Regulatory requirements and customer specifications must determine acceptable compliance levels for your application.

Q: What is the base product number for all these parts?

A: All substitute parts share the base product number 74HCT541, indicating they implement the same logic function and electrical specifications within the 74HCT series.

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