DM74ALS541N Equivalent & Substitute Parts

Part Overview

The DM74ALS541N is a non-inverting buffer logic integrated circuit manufactured by onsemi, designed for 8-bit buffering applications with 3-state output capability. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-pin DIP package. The part is currently classified as obsolete, making identification of functionally equivalent alternatives 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
Voltage - Supply	4.5V ~ 5.5V
Current - Output High, Low	15mA, 24mA
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	20-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS541N are classified based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Logic Function: Non-inverting buffer with 1 element, 8 bits per element, and 3-state output
Package Compatibility: 20-DIP form factor with 0.300" (7.62mm) pitch
Mounting Type: Through-hole configuration
Supply Voltage Range: Compatibility within or encompassing 4.5V to 5.5V operation
Output Current Specifications: Ability to source and sink specified current levels

Two direct substitutes are identified: the SN74ALS541N (Texas Instruments) and SN74ALS541-1N (Texas Instruments), both maintaining identical logic specifications and supply voltage parameters. The TC74HC541APF (Toshiba Semiconductor and Storage) represents a functional alternative operating across an extended voltage range (2V to 6V) with different output current characteristics and expanded temperature range.

Parameter Comparison

Parameter	DM74ALS541N	SN74ALS541N	SN74ALS541-1N	TC74HC541APF
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Toshiba Semiconductor and Storage
Series	74ALS	74ALS	74ALS	74HC
Product Status	Obsolete	Active	Active	Active
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	1	1	1	1
Number of Bits per Element	8	8	8	8
Output Type	3-State	3-State	3-State	3-State
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	2V ~ 6V
Current - Output High, Low	15mA, 24mA	15mA, 24mA	15mA, 48mA	7.8mA, 7.8mA
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)	20-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	Not Specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SN74ALS541N (Texas Instruments) is the primary direct substitute for the DM74ALS541N. Both components share identical electrical specifications, including supply voltage range (4.5V to 5.5V), output current ratings (15mA, 24mA), and operating temperature range (0°C to 70°C). The SN74ALS541N maintains active product status and carries ROHS3 compliance certification, making it suitable for new designs and legacy system replacements.

SN74ALS541-1N (Texas Instruments) provides an alternative within the 74ALS family with identical supply voltage and temperature specifications. This variant features increased output low current capability (48mA versus 24mA), which may be advantageous in applications requiring higher sink current. Active product status and ROHS3 compliance are maintained.

TC74HC541APF (Toshiba Semiconductor and Storage) operates across an extended supply voltage range (2V to 6V) and temperature range (-40°C to 85°C), providing broader environmental compatibility. However, output current specifications are reduced (7.8mA for both high and low states). This substitute is appropriate for applications where extended temperature operation or lower supply voltage flexibility is required, provided output current demands do not exceed 7.8mA.

Frequently Asked Questions (FAQ)

Q: Can the SN74ALS541N directly replace the DM74ALS541N in existing designs?

A: Yes. The SN74ALS541N is a direct electrical and mechanical equivalent. Both components share identical logic function, supply voltage range, output current specifications, operating temperature range, and 20-DIP package configuration. No circuit modifications are required.

Q: What is the difference between SN74ALS541N and SN74ALS541-1N?

A: Both components are functionally equivalent non-inverting buffers with identical supply voltage (4.5V to 5.5V) and temperature specifications (0°C to 70°C). The primary difference is output low current capability: SN74ALS541N provides 24mA while SN74ALS541-1N provides 48mA. Selection depends on circuit sink current requirements.

Q: Is the TC74HC541APF suitable as a substitute?

A: The TC74HC541APF is functionally compatible as a non-inverting 8-bit buffer in 20-DIP package. However, output current capability is reduced to 7.8mA (both high and low states) compared to the original 15mA/24mA specification. This substitute is appropriate only when output current demands do not exceed 7.8mA. The extended supply voltage range (2V to 6V) and temperature range (-40°C to 85°C) provide additional operational flexibility.

Q: Are all substitutes available in the same packaging format?

A: Yes. All substitute parts are housed in 20-DIP (0.300", 7.62mm) through-hole packages, ensuring mechanical compatibility with existing PCB layouts and socket configurations.

Q: What compliance certifications apply to these substitutes?

A: SN74ALS541N, SN74ALS541-1N, and TC74HC541APF all carry ROHS3 compliance certification. All parts are classified as REACH Unaffected and carry EAR99 export classification.

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