74ACTQ541SCX Equivalent & Substitute Parts

Part Overview

The 74ACTQ541SCX is a non-inverting buffer logic IC manufactured by onsemi, designed for 8-bit buffering applications with 3-state output capability. This device operates across a 4.5V to 5.5V supply range and is housed in a 20-SOIC surface mount package. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	1
Number of Bits per Element	8
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 74ACTQ541SCX is determined by strict equivalence across the following parameters: logic type (non-inverting buffer), element and bit configuration (1 element, 8 bits), output type (3-state), output current capability (24mA), supply voltage range (4.5V ~ 5.5V), package type (20-SOIC), and mounting method (surface mount).

All substitute parts listed maintain these core electrical and mechanical specifications. Differences in product status, packaging format (tube, tape & reel, cut tape), operating temperature range, and compliance certifications do not affect functional substitutability within the specified electrical parameters.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements / Bits	Output Type	Current (mA)	Supply Voltage	Temp Range (°C)	Package	Product Status	Packaging Format
74ACTQ541SCX	onsemi	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-40 ~ 85	20-SOIC	Obsolete	—
MC74ACT541DWG	onsemi	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-40 ~ 85	20-SOIC	Active	Tube
74ACT541SCX	onsemi	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-40 ~ 85	20-SOIC	Active	Tape & Reel (TR)
MC74ACT541DWR2G	onsemi	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-40 ~ 85	20-SOIC	Active	Cut Tape (CT) & Digi-Reel®
NLVACT541DWR2G	onsemi	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-40 ~ 85	20-SOIC	Obsolete	Tape & Reel (TR)
CD74ACT541M	Texas Instruments	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-55 ~ 125	20-SOIC	Discontinued at DiGi Electronics	Tube
CD74ACT541M96	Texas Instruments	Buffer, Non-Inverting	1 / 8	3-State	24, 24	4.5 ~ 5.5V	-55 ~ 125	20-SOIC	Active	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For direct replacement of the obsolete 74ACTQ541SCX, the active onsemi parts MC74ACT541DWG, 74ACT541SCX, and MC74ACT541DWR2G provide full electrical and mechanical compatibility. These parts maintain identical operating specifications within the -40°C to 85°C temperature range and are currently in active production status.

The Texas Instruments alternatives CD74ACT541M and CD74ACT541M96 are functionally equivalent but feature an extended operating temperature range (-55°C to 125°C). CD74ACT541M96 is currently active and available, while CD74ACT541M is discontinued at DiGi Electronics.

The onsemi NLVACT541DWR2G is an automotive-grade variant (AEC-Q100 qualified) with identical electrical parameters but is listed as obsolete.

Selection should prioritize active production status parts. Packaging format (tube, tape & reel, cut tape) should be chosen based on assembly process requirements and volume needs.

Frequently Asked Questions (FAQ)

Q: Can MC74ACT541DWG replace 74ACTQ541SCX directly? A: Yes. Both parts share identical logic type, bit configuration, output type, current ratings, supply voltage, and operating temperature range. The difference is packaging format (tube vs. unspecified) and product status (active vs. obsolete). Electrical and mechanical compatibility is complete.

Q: What is the difference between 74ACT541SCX and MC74ACT541DWR2G? A: Both are onsemi 74ACT541 variants with identical electrical specifications. The primary differences are packaging format (tape & reel vs. cut tape & Digi-Reel) and inventory availability. Selection depends on assembly equipment compatibility and procurement volume.

Q: Are Texas Instruments CD74ACT541M96 and onsemi MC74ACT541DWR2G interchangeable? A: Yes, within the 4.5V to 5.5V supply and -40°C to 85°C operating range. The CD74ACT541M96 supports extended temperature operation (-55°C to 125°C), but this additional capability does not affect substitutability for applications within the standard range. Both maintain 24mA output current and 3-state output configuration.

Q: Why is NLVACT541DWR2G listed as obsolete if it is electrically equivalent? A: NLVACT541DWR2G is an automotive-grade variant (AEC-Q100 qualified) designed for automotive applications. Its obsolete status reflects market discontinuation, not functional deficiency. It remains electrically and mechanically compatible but should not be selected for new designs due to availability constraints.

Q: Does packaging format affect electrical performance? A: No. Tube, tape & reel, and cut tape formats are packaging and delivery methods only. They do not alter electrical characteristics, performance, or reliability. Selection should be based on assembly process requirements and volume handling capabilities.

Q: Can I use CD74ACT541M instead of CD74ACT541M96? A: Both are Texas Instruments 74ACT541 variants with identical electrical specifications. CD74ACT541M is discontinued at DiGi Electronics, making CD74ACT541M96 the preferred active alternative. For new applications, CD74ACT541M96 is recommended.

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