74ABT543CSCX Equivalent & Substitute Parts

Part Overview

The 74ABT543CSCX is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. This device operates across a 4.5V to 5.5V supply voltage range and is housed in a 24-SOP package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT543CSCX
Manufacturer	onsemi
Series	74ABT
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	4.5V ~ 5.5V
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

Substitution for the 74ABT543CSCX is determined by strict equivalence across the following critical 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: 4.5V ~ 5.5V
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 24-SOIC (0.295", 7.50mm Width)
Mounting Type: Surface Mount
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical and mechanical specifications. Differences in manufacturer, product status, and packaging format (tube vs. tape & reel) do not affect functional compatibility in equivalent applications.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current (High/Low)	Supply Voltage	Temp Range	Package	Product Status	RoHS Status
74ABT543CSCX	onsemi	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Obsolete	REACH Unaffected
SN74ABT543ADW	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Active	ROHS3 Compliant
SN74ABT543ADWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Active	ROHS3 Compliant
SN74ABT2952ADWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Active	ROHS3 Compliant
SN74ABT646ADWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Active	ROHS3 Compliant
SN74ABT646DWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Active	ROHS3 Compliant
SN74ABT652ADWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Active	ROHS3 Compliant
SN74ABT652DWR	Texas Instruments	Transceiver, Non-Inverting	1 / 8	3-State	32mA, 64mA	4.5V ~ 5.5V	-40°C ~ 85°C	24-SOIC	Discontinued at DiGi Electronics	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the 74ABT543CSCX. Selection should prioritize parts with Active product status for long-term availability and supply chain stability.

Texas Instruments SN74ABT543ADW and SN74ABT543ADWR are direct functional equivalents with identical base part numbers and active status. These parts are recommended as primary substitutes due to established availability and ROHS3 compliance.

SN74ABT2952ADWR, SN74ABT646ADWR, SN74ABT646DWR, and SN74ABT652ADWR are parametric equivalents that meet all electrical and mechanical requirements. These parts differ in base product designation but maintain identical functional specifications. SN74ABT652DWR is listed as discontinued at DiGi Electronics and should be considered only when other options are unavailable.

Packaging format differences (tube vs. tape & reel) do not affect functional performance and are determined by procurement and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT543ADWR be used as a direct replacement for 74ABT543CSCX?

A: Yes. Both parts share identical electrical specifications, operating parameters, and 24-SOIC package dimensions. The primary difference is manufacturer (Texas Instruments vs. onsemi) and product status (Active vs. Obsolete).

Q: What is the difference between SN74ABT543ADWR and SN74ABT2952ADWR?

A: Both parts are parametric equivalents with identical electrical and mechanical specifications. The difference lies in the base product number designation (74ABT543 vs. 74ABT2952). Functional performance in equivalent applications is identical.

Q: Are the tape & reel (TR) packaged parts functionally equivalent to tube-packaged versions?

A: Yes. Packaging format (tube vs. tape & reel) affects only procurement and assembly handling. Electrical and mechanical specifications remain identical across all packaging options.

Q: Why is SN74ABT652DWR listed as discontinued?

A: SN74ABT652DWR is discontinued at DiGi Electronics but remains a parametric equivalent. It should be used only when other active alternatives are unavailable.

Q: What compliance certifications apply to substitute parts?

A: All Texas Instruments substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components.

Q: Can I mix different substitute part numbers in the same design?

A: Yes. All listed parts maintain identical electrical and mechanical specifications, allowing interchangeability within the same application without design modification.

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