74LVTH543WM Equivalent & Substitute Parts

Part Overview

The 74LVTH543WM is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. Designed for 2.7V to 3.6V supply voltage operation, this component is classified as obsolete. Due to its obsolete status, identifying equivalent and substitute parts from active manufacturers ensures design continuity and supply chain reliability for applications requiring compatible transceiver functionality.

Key Parameters

Parameter	Value
Manufacturer Part Number	74LVTH543WM
Manufacturer	onsemi
Series	74LVTH
Logic Type	Transceiver, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	32mA, 64mA
Voltage - Supply	2.7V ~ 3.6V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	24-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 74LVTH543WM are identified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Core Electrical Parameters:

Logic Type: Transceiver, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Current - Output High, Low: 32mA, 64mA
Voltage - Supply: 2.7V ~ 3.6V
Operating Temperature: -40°C ~ 85°C (TA)

Mechanical Parameters:

Package / Case: 24-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain these parameters, ensuring functional and physical compatibility. Substitute parts are sourced from Texas Instruments, an active manufacturer, providing improved product status and supply availability compared to the obsolete onsemi part.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Elements	Bits/Element	Output Type	Current (High/Low)	Supply Voltage	Temp Range	Package	Product Status
74LVTH543WM	onsemi	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Obsolete
SN74LVTH543DWR	Texas Instruments	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Active
SN74LVT543DW	Texas Instruments	74LVT	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Active
SN74LVTH2952DW	Texas Instruments	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Active
SN74LVTH543DW	Texas Instruments	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Active
SN74LVTH646DW	Texas Instruments	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Active
SN74LVTH646DWG4	Texas Instruments	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Discontinued at DiGi Electronics
SN74LVTH652DW	Texas Instruments	74LVTH	Transceiver, Non-Inverting	1	8	3-State	32mA, 64mA	2.7V ~ 3.6V	-40°C ~ 85°C	24-SOIC	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status):

SN74LVTH543DWR, SN74LVTH543DW, SN74LVTH2952DW, SN74LVTH646DW, and SN74LVTH652DW are all active products from Texas Instruments with identical electrical and mechanical parameters to the 74LVTH543WM. These parts are ROHS3 compliant and maintain the same MSL rating. SN74LVTH543DWR is available in Tape & Reel packaging, while others are supplied in Tube packaging.

Alternative Series Option:

SN74LVT543DW represents a parametric equivalent from the 74LVT series rather than 74LVTH. This part maintains all critical electrical specifications and package requirements while offering active product status and ROHS3 compliance.

Avoid:

SN74LVTH646DWG4 is discontinued at DiGi Electronics and should not be selected for new designs requiring long-term supply assurance.

Frequently Asked Questions (FAQ)

Q: Can I use SN74LVTH543DW as a direct replacement for 74LVTH543WM?

A: Yes. Both parts share identical electrical parameters (1 element, 8 bits per element, 3-state output, 32mA/64mA output current, 2.7V–3.6V supply), operating temperature range (-40°C to 85°C), and 24-SOIC package. SN74LVTH543DW is active and ROHS3 compliant.

Q: What is the difference between SN74LVTH543DWR and SN74LVTH543DW?

A: Both parts are electrically and mechanically identical. The primary difference is packaging: SN74LVTH543DWR is supplied in Tape & Reel format, while SN74LVTH543DW is supplied in Tube format. Selection depends on assembly process requirements.

Q: Why are there multiple part numbers (SN74LVTH2952DW, SN74LVTH646DW, SN74LVTH652DW) listed as substitutes?

A: These parts are parametric equivalents sharing all critical electrical specifications and the 24-SOIC package with the 74LVTH543WM. They differ in base product number but maintain functional compatibility for applications requiring non-inverting transceiver logic with 8-bit, 3-state output capability.

Q: Is SN74LVT543DW compatible with designs using 74LVTH543WM?

A: Yes. SN74LVT543DW maintains all required electrical parameters and package specifications. The series designation change (74LVT vs. 74LVTH) reflects manufacturing lineage but does not affect functional compatibility for this application.

Q: Should I consider SN74LVTH646DWG4 for new designs?

A: No. This part is discontinued at DiGi Electronics. For new designs, select from active products: SN74LVTH543DWR, SN74LVTH543DW, SN74LVTH2952DW, SN74LVTH646DW, or SN74LVTH652DW.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Texas Instruments substitute parts listed are ROHS3 compliant. The original 74LVTH543WM does not specify RoHS status.

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