DM74ALS541WMX Equivalent & Substitute Parts

Part Overview

The DM74ALS541WMX is a Buffer, Non-Inverting logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability. Designed for 4.5V to 5.5V supply operation with 0°C to 70°C operating temperature range, this component is housed in a 20-SOIC package. The part is currently listed as obsolete, making identification of equivalent and substitute parts essential for ongoing system support and new design implementations.

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	15mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	20-SOIC
Mounting Type	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DM74ALS541WMX is determined by the following critical parameters:

Logic Type: Buffer, Non-Inverting
Number of Elements: 1
Number of Bits per Element: 8
Output Type: 3-State
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: 0°C ~ 70°C (TA)
Mounting Type: Surface Mount
Series: 74ALS

Substitute parts are grouped into three categories based on their relationship to the main part:

Direct Manufacturer Equivalent: SN74ALS541DW and SN74ALS541DWR share identical electrical specifications and package dimensions (20-SOIC, 0.295" width) with the DM74ALS541WMX. These parts differ only in packaging format (Tube vs. Tape & Reel).

Similar Parts: SN74ALS541-1DW, SN74ALS541-1NSR, and SN74ALS541NSR maintain all critical electrical parameters but feature variations in output current specifications (48mA low output vs. 24mA) and package width (20-SO, 0.209" width). These parts are functionally compatible within the 74ALS series.

Parametric Equivalent: SN74ALS541DWR provides complete electrical and mechanical compatibility with identical current ratings and package specifications.

Parameter Comparison

Parameter	DM74ALS541WMX	SN74ALS541DW	SN74ALS541-1DW	SN74ALS541-1NSR	SN74ALS541NSR	SN74ALS541DWR
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	1	1	1	1	1	1
Number of Bits per Element	8	8	8	8	8	8
Output Type	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	15mA, 24mA	15mA, 24mA	15mA, 48mA	15mA, 48mA	15mA, 24mA	15mA, 24mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.209", 5.30mm)	20-SOIC (0.209", 5.30mm)	20-SOIC (0.295", 7.50mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For applications currently using the obsolete DM74ALS541WMX, the following selection criteria apply:

Primary Recommendation: SN74ALS541DW or SN74ALS541DWR are the preferred direct substitutes, offering identical electrical specifications and package dimensions. Both parts are manufactured by Texas Instruments and maintain full compatibility with existing PCB layouts. SN74ALS541DWR is recommended for high-volume applications due to its Tape & Reel packaging format and active product status.

Secondary Options: SN74ALS541-1DW and SN74ALS541-1NSR provide functional equivalence with enhanced output current capability (48mA low output). These parts are suitable for applications where increased drive capability is beneficial. The narrower package width (0.209" vs. 0.295") requires PCB layout verification for footprint compatibility.

Compliance Consideration: All Texas Instruments substitute parts carry ROHS3 compliance certification, supporting modern manufacturing and environmental standards. The DM74ALS541WMX's obsolete status necessitates transition to an active product line for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS541-1DW be used as a direct replacement for DM74ALS541WMX?

A: SN74ALS541-1DW is functionally compatible and maintains all critical electrical parameters. However, it features higher output current capability (48mA low output vs. 24mA) and identical package dimensions (20-SOIC, 0.295" width). Electrical compatibility is confirmed; PCB layout remains unchanged.

Q: What is the difference between SN74ALS541DW and SN74ALS541DWR?

A: Both parts are electrically and mechanically identical. The difference lies in packaging format: SN74ALS541DW is supplied in Tube packaging, while SN74ALS541DWR is supplied in Tape & Reel format. Selection depends on assembly process requirements and volume considerations.

Q: Are SN74ALS541-1NSR and SN74ALS541NSR interchangeable with the original DM74ALS541WMX?

A: Both parts maintain electrical compatibility with the DM74ALS541WMX. However, the package width differs (0.209" vs. 0.295"), requiring verification of PCB footprint compatibility. Output current specifications also vary: SN74ALS541-1NSR provides 48mA low output, while SN74ALS541NSR provides 24mA low output, matching the original part.

Q: Why is the DM74ALS541WMX listed as obsolete?

A: The part has reached end-of-life status with onsemi. Texas Instruments maintains active production of functionally equivalent 74ALS541 variants, providing continuity for system support and new designs.

Q: What packaging options are available for 74ALS541 substitutes?

A: Available packaging formats include Tube (SN74ALS541DW), Tape & Reel (SN74ALS541DWR, SN74ALS541-1NSR), and Cut Tape & Digi-Reel (SN74ALS541NSR). Package selection should align with assembly process capabilities and volume requirements.

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