SN74ACT244MNSREP Equivalent & Substitute Parts

Part Overview

The SN74ACT244MNSREP is a Buffer, Non-Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This device operates across a 4.5V to 5.5V supply voltage range and is rated for -55°C to 125°C operating temperature. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical specifications and functional characteristics align with the main part's core parameters, enabling direct replacement in applications where packaging and temperature rating differences are acceptable.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V
Series	74ACT
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT244MNSREP are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain identical logic type (Buffer, Non-Inverting), element count (2), bit configuration (4 bits per element), output type (3-state), and output current specifications (24mA, 24mA). Supply voltage range (4.5V ~ 5.5V) is preserved across all substitutes.

Functional Compatibility: All parts belong to the 74ACT logic series and share the same base product number (74ACT244), ensuring functional interchangeability at the circuit level.

Physical Compatibility: All substitute parts use Surface Mount technology with 20-SOIC package configuration, maintaining mechanical compatibility with existing PCB layouts.

Compliance Alignment: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the main part.

Allowable Variations: Operating temperature range and packaging format (Tube vs. Cut Tape & Digi-Reel) differ between the main part and substitutes. These variations are acceptable when application requirements permit.

Parameter Comparison

Parameter	SN74ACT244MNSREP (TI)	74ACT244SC (onsemi)	74ACT244SCX (onsemi)
Manufacturer	Texas Instruments	onsemi	onsemi
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2
Number of Bits per Element	4	4	4
Output Type	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-SOIC (0.209", 5.30mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)
Packaging Format	Tape & Reel (TR)	Tube	Cut Tape (CT) & Digi-Reel®
Moisture Sensitivity Level (MSL)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Selection (SN74ACT244MNSREP): Select this Texas Instruments part when extended operating temperature range (-55°C to 125°C) is required or when MSL 1 moisture sensitivity is specified. This part is suitable for industrial and military-grade applications with demanding environmental conditions.

Alternative Selection (74ACT244SC): This onsemi part is suitable for commercial applications operating within -40°C to 85°C temperature range. Tube packaging is appropriate for lower-volume assembly or manual placement operations. MSL 3 rating requires compliance with 168-hour moisture exposure limits.

Alternative Selection (74ACT244SCX): This onsemi part provides the same electrical and functional specifications as 74ACT244SC with Cut Tape & Digi-Reel packaging, optimized for automated assembly and higher-volume production environments. MSL 3 rating applies.

All substitute parts maintain Active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment with the main part.

Frequently Asked Questions (FAQ)

Q: Can 74ACT244SC or 74ACT244SCX be used as direct replacements for SN74ACT244MNSREP?

A: Yes, at the functional and electrical level. All three parts share identical logic specifications, output characteristics, and supply voltage requirements. However, the operating temperature range differs: onsemi parts are rated -40°C to 85°C versus Texas Instruments -55°C to 125°C. Selection depends on application temperature requirements.

Q: What is the difference between 74ACT244SC and 74ACT244SCX?

A: Both parts are electrically and functionally identical. The difference is packaging format: 74ACT244SC uses Tube packaging, while 74ACT244SCX uses Cut Tape & Digi-Reel packaging. Choose based on assembly process requirements and volume.

Q: Are there physical package differences between the main part and substitutes?

A: Yes. The SN74ACT244MNSREP uses a 20-SOIC package with 0.209" (5.30mm) width, while both onsemi substitutes use 20-SOIC with 0.295" (7.50mm) width. Both are 20-pin SOIC packages and will fit standard 20-SOIC footprints, but the width difference should be verified against specific PCB layout constraints.

Q: What does MSL 3 (168 Hours) mean compared to MSL 1 (Unlimited)?

A: MSL rating indicates moisture sensitivity. MSL 1 (Unlimited) means the part has no time restriction for storage in non-controlled environments. MSL 3 (168 Hours) requires that the part be used within 168 hours of exposure to uncontrolled humidity conditions, or it must be baked before use. This affects storage and handling procedures.

Q: Are all parts ROHS3 compliant?

A: Yes. SN74ACT244MNSREP, 74ACT244SC, and 74ACT244SCX are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message