74HC540D,652 Equivalent & Substitute Parts

Part Overview

The 74HC540D,652 is an inverting buffer logic integrated circuit manufactured by Nexperia USA Inc. in a 20-SO surface mount package. This device functions as a Buffer, Inverting with 1 element and 8 bits per element, featuring 3-state output capability. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Specification
Logic Type	Buffer, Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	7.8mA, 7.8mA
Voltage - Supply	2V ~ 6V
Operating Temperature Range	-40°C ~ 125°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 74HC540D,652 is determined by the following critical parameters:

Logic Type: Buffer, Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 7.8mA, 7.8mA
Voltage - Supply: 2V ~ 6V
Package / Case: 20-SOIC (0.295", 7.50mm Width)

All substitute parts listed maintain these core electrical and mechanical specifications. Variations in operating temperature range, product status, packaging format (tube, tape & reel, cut tape), and compliance certifications are secondary considerations that do not affect functional equivalence within the specified parameter set.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Logic Type	Output Type	Current (mA)	Voltage Supply	Operating Temp (°C)	Package	Product Status	RoHS Status
74HC540D,652	Nexperia USA Inc.	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-SOIC	Obsolete	ROHS3
74HC7540D,112	Nexperia USA Inc.	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 125	20-SOIC	Obsolete	ROHS3
CD74HC540M96	Texas Instruments	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active	ROHS3
MC74HC540ADWG	onsemi	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active	ROHS3
MC74HC540ADWR2G	onsemi	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Active	ROHS3
MM74HC540WM	onsemi	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Active	ROHS3
MM74HC540WMX	onsemi	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Active	ROHS3
SN74HC540DWR	Texas Instruments	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-40 ~ 85	20-SOIC	Active	ROHS3
CD74HC540M	Harris Corporation	Buffer, Inverting	3-State	7.8 / 7.8	2V ~ 6V	-55 ~ 125	20-SOIC	Obsolete	Non-compliant

Engineering Selection Recommendations

For applications requiring the 74HC540D,652, the following selection criteria apply:

Active Product Status Priority: CD74HC540M96 (Texas Instruments), MC74HC540ADWG (onsemi), MC74HC540ADWR2G (onsemi), MM74HC540WM (onsemi), MM74HC540WMX (onsemi), and SN74HC540DWR (Texas Instruments) are all active products with full manufacturer support and ROHS3 compliance.

Extended Temperature Range: CD74HC540M96 and MC74HC540ADWG/MC74HC540ADWR2G support -55°C to 125°C operating range, matching or exceeding the original part's -40°C to 125°C specification.

Standard Temperature Range: MM74HC540WM, MM74HC540WMX, and SN74HC540DWR operate within -40°C to 85°C, suitable for applications not requiring the full upper temperature extension.

Parametric Equivalent (Obsolete): 74HC7540D,112 from Nexperia USA Inc. provides identical electrical and thermal specifications to the main part but shares obsolete status.

Legacy Compliance Consideration: CD74HC540M (Harris Corporation) maintains functional equivalence but is RoHS non-compliant and obsolete, limiting suitability for new designs.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the 74HC540D,652?

A: Yes. All listed substitute parts maintain identical logic type, element count, bit configuration, output type, current ratings, and supply voltage specifications. The 20-SOIC package footprint is consistent across all parts, enabling direct PCB-level substitution.

Q: What is the difference between the various onsemi part numbers (MC74HC540ADWG, MC74HC540ADWR2G, MM74HC540WM, MM74HC540WMX)?

A: These parts differ in packaging format and operating temperature range. MC74HC540ADWG and MC74HC540ADWR2G support -55°C to 125°C with tube and cut tape packaging respectively. MM74HC540WM and MM74HC540WMX operate at -40°C to 85°C in tube and tape & reel formats respectively. All maintain identical electrical specifications.

Q: Why is the CD74HC540M listed if it is RoHS non-compliant?

A: CD74HC540M is included as a parametric equivalent for reference purposes. However, it is not recommended for new designs due to RoHS non-compliance and obsolete status. Active, compliant alternatives are available.

Q: Does operating temperature range affect functional substitution?

A: Operating temperature range does not affect functional substitution within the specified electrical parameters. Selection should be based on application requirements. Parts with -55°C to 125°C range provide extended capability; parts with -40°C to 85°C range are suitable for standard industrial applications.

Q: Are there packaging format differences I should consider?

A: Yes. Substitute parts are available in tube, tape & reel (TR), and cut tape (CT) & Digi-Reel formats. Selection depends on procurement and assembly requirements. All formats maintain the same 20-SOIC package footprint and electrical specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message