74LVTH240WM Equivalent & Substitute Parts

Part Overview

The 74LVTH240WM is an inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This component operates across a 2.7V to 3.6V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	Buffer, Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74LVTH240WM is determined by strict equivalence across the following parameters:

Logic Type: Buffer, Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 32mA, 64mA
Voltage - Supply: 2.7V ~ 3.6V
Operating Temperature: -40°C ~ 85°C (TA)
Mounting Type: Surface Mount
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are categorized as follows:

Direct Manufacturer Equivalent: Parts with identical electrical specifications, package designation, and form factor from alternative manufacturers.

Similar Parts: Parts meeting all electrical and thermal specifications but with minor package variations (20-SO vs. 20-SOIC width differences) or different series designations (74LVT vs. 74LVTH).

Parametric Equivalents: Parts with identical electrical performance and primary package type but different packaging formats (Tube vs. Tape & Reel).

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Package / Case	Packaging Format	Logic Type	Elements / Bits	Output Type	Current (High/Low)	Voltage Supply	Temp Range	RoHS Status
74LVTH240WM	onsemi	74LVTH	Obsolete	20-SOIC (0.295", 7.50mm)	-	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	-
SN74LVTH240DWR	Texas Instruments	74LVTH	Active	20-SOIC (0.295", 7.50mm)	Tape & Reel (TR)	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	ROHS3 Compliant
74LVT240D,118	NXP USA Inc.	74LVT	Active	20-SOIC (0.295", 7.50mm)	Bulk	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	-
SN74LVT240ADWR	Texas Instruments	74LVT	Active	20-SOIC (0.295", 7.50mm)	Tape & Reel (TR)	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	ROHS3 Compliant
SN74LVT240ANSR	Texas Instruments	74LVT	Active	20-SOIC (0.209", 5.30mm)	Tape & Reel (TR)	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	ROHS3 Compliant
SN74LVTH240NSR	Texas Instruments	74LVTH	Active	20-SOIC (0.209", 5.30mm)	Cut Tape (CT) & Digi-Reel®	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	ROHS3 Compliant
SN74LVT240ADW	Texas Instruments	74LVT	Active	20-SOIC (0.295", 7.50mm)	Tube	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	ROHS3 Compliant
SN74LVTH240DW	Texas Instruments	74LVTH	Active	20-SOIC (0.295", 7.50mm)	Tube	Buffer, Inverting	2 / 4	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SN74LVTH240DWR (Texas Instruments) is the direct equivalent substitute. This part maintains identical electrical specifications, package dimensions (20-SOIC 0.295" width), and series designation (74LVTH) as the obsolete 74LVTH240WM. The part is active in production with ROHS3 compliance and MSL 1 rating, ensuring long-term availability and regulatory alignment.

Alternative Recommendation: SN74LVTH240DW (Texas Instruments) provides parametric equivalence with identical electrical and thermal performance in Tube packaging format. This option is suitable for applications where packaging format flexibility is acceptable.

Secondary Recommendation: SN74LVT240ADWR (Texas Instruments) is functionally equivalent across all electrical parameters and operates within the same voltage and temperature ranges. The 74LVT series represents an alternative logic family with active production status and ROHS3 compliance. This part is suitable for designs where series compatibility is not a constraint.

Package Consideration: Parts designated with NSR suffix (SN74LVT240ANSR, SN74LVTH240NSR) feature a narrower package width (0.209" vs. 0.295"), which may require PCB layout verification before implementation.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVT240ADWR as a direct replacement for 74LVTH240WM?

A: Yes. Both parts meet all electrical specifications: 2 elements, 4 bits per element, 3-state output, 32mA/64mA output current, 2.7V–3.6V supply voltage, and -40°C to 85°C operating temperature. The 74LVT series is functionally compatible with 74LVTH applications. Verify PCB layout compatibility with the selected packaging format.

Q: What is the difference between 74LVTH and 74LVT series parts?

A: Both series meet identical electrical and thermal specifications for this buffer application. The 74LVTH designation represents a later generation with enhanced performance characteristics, while 74LVT represents an earlier generation. For the 74LVTH240 function, both series are electrically interchangeable.

Q: Does package width variation affect compatibility?

A: Package width differences (0.295" vs. 0.209") affect PCB footprint and land pattern dimensions. Parts with 0.209" width (NSR suffix) require verification against your PCB design. If your design uses a 0.295" footprint, select parts with matching width specifications.

Q: Are all substitute parts ROHS3 compliant?

A: The Texas Instruments parts (SN74LVTH240DWR, SN74LVT240ADWR, SN74LVT240ANSR, SN74LVTH240NSR, SN74LVT240ADW, SN74LVTH240DW) are ROHS3 compliant. The NXP part (74LVT240D,118) does not specify RoHS status in the provided data. Verify compliance requirements for your application.

Q: What packaging formats are available?

A: Substitute parts are available in Tape & Reel (TR), Tube, Cut Tape (CT) & Digi-Reel®, and Bulk formats. Select based on your procurement and assembly process requirements. Tape & Reel format is standard for automated assembly; Tube format is suitable for manual assembly or lower-volume applications.

Q: Is the obsolete 74LVTH240WM still available?

A: The 74LVTH240WM is classified as obsolete. Active production alternatives from Texas Instruments and NXP ensure continued availability and supply chain stability for new designs and production runs.

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