SN74ACT244DW Equivalent & Substitute Parts

Part Overview

The SN74ACT244DW is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability in a 20-SOIC package. This part is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 74ACT244 series provides buffering functionality for digital signal distribution in logic circuits operating at 4.5V to 5.5V supply voltage with output drive capability of 24mA for both high and low states.

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
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SN74ACT244DW are classified based on the following substitution criteria:

Direct Manufacturer Substitutes maintain identical electrical and mechanical specifications with the main part, differing only in packaging format (Cut Tape & Digi-Reel® or Tape & Reel versus Tube). These parts are pin-compatible and functionally equivalent with no circuit redesign required.

Parametric Equivalents share all critical electrical parameters (logic type, element count, bit configuration, output type, current ratings, voltage supply range, and operating temperature) and package dimensions, but may differ in base product number, manufacturer, or product status. These parts are functionally interchangeable in circuit applications.

The key parameters determining substitutability are:

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
Operating Temperature: -40°C ~ 85°C (TA)
Package / Case: 20-SOIC (0.295", 7.50mm Width)

Parameter Comparison

Part Number	Manufacturer	Product Status	Packaging	Logic Type	Elements	Bits/Element	Output Type	Current (mA)	Voltage (V)	Temp Range (°C)	Package	MSL	Inventory (Pcs)
SN74ACT244DW	Texas Instruments	Discontinued	Tube	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	1	7200
SN74ACT244DWR	Texas Instruments	Active	Cut Tape & Digi-Reel®	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	1	93100
74ACT244SCX	onsemi	Active	Cut Tape & Digi-Reel®	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	3	9458
MC74ACT244DWR2G	onsemi	Active	Tape & Reel	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	3	35100
74ACT244SC	onsemi	Active	Tube	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	3	1665
MC74ACT241DWG	onsemi	Obsolete	—	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	3	1126
MC74ACT244DWG	onsemi	Active	Tube	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	3	2032
SN74ACT241DW	Texas Instruments	Last Time Buy	Tube	Buffer, Non-Inverting	2	4	3-State	24, 24	4.5 ~ 5.5	-40 ~ 85	20-SOIC	1	2680

Engineering Selection Recommendations

For Active Production: SN74ACT244DWR (Texas Instruments, Active status) is the primary direct substitute, offering the same electrical specifications with improved availability (93,100 pcs in stock) and active product status. This part differs only in packaging format (Cut Tape & Digi-Reel® versus Tube).

For Tube Packaging Requirement: MC74ACT244DWG (onsemi, Active status) provides tube packaging equivalent to the original SN74ACT244DW with all electrical parameters maintained. Inventory availability is 2,032 pcs.

For High-Volume Applications: MC74ACT244DWR2G (onsemi, Active status, Tape & Reel packaging) offers the highest inventory level (35,100 pcs) with active product status and full electrical equivalence.

For Cost-Optimized Selection: 74ACT244SCX (onsemi, Active status) provides parametric equivalence with substantial inventory (9,458 pcs) in Cut Tape & Digi-Reel® format.

Avoid: MC74ACT241DWG (Obsolete status) and SN74ACT241DW (Last Time Buy status) should not be selected for new designs due to discontinued or end-of-life product status.

All substitute parts maintain ROHS3 compliance and REACH unaffected status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can I use SN74ACT244DWR as a direct replacement for SN74ACT244DW?

A: Yes. SN74ACT244DWR is a direct substitute with identical electrical specifications and 20-SOIC package dimensions. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tube). No circuit modifications are required.

Q: What is the difference between Direct Manufacturer Substitutes and Parametric Equivalents?

A: Direct Manufacturer Substitutes are the same part from the same manufacturer in different packaging formats. Parametric Equivalents share all critical electrical and mechanical specifications but may be from different manufacturers or have different base product numbers. Both are functionally interchangeable in circuit applications.

Q: Does moisture sensitivity level (MSL) affect substitutability?

A: MSL differences do not affect electrical substitutability. However, MSL 1 (Unlimited) parts like SN74ACT244DW and SN74ACT244DWR have less stringent moisture handling requirements than MSL 3 (168 Hours) parts. Storage and handling procedures should follow the most restrictive MSL rating in your supply chain.

Q: Are onsemi 74ACT244 parts pin-compatible with Texas Instruments SN74ACT244DW?

A: Yes. All substitute parts listed maintain identical pin configuration and 20-SOIC package dimensions (0.295", 7.50mm Width). Pin-for-pin compatibility is guaranteed across all listed substitutes.

Q: Why is MC74ACT241DWG listed if it is obsolete?

A: MC74ACT241DWG is included for reference in existing designs that may currently use this part. For new designs and production continuity, active-status alternatives should be selected.

Q: Can I mix different manufacturers' parts in the same production batch?

A: Yes. All listed substitutes meet identical electrical specifications, RoHS3 compliance, and REACH requirements. However, quality assurance procedures should verify incoming parts from different manufacturers meet your specific acceptance criteria.

Q: What packaging format should I specify for high-volume automated assembly?

A: For automated pick-and-place assembly, specify Cut Tape & Digi-Reel® (SN74ACT244DWR, 74ACT244SCX) or Tape & Reel (MC74ACT244DWR2G) formats. Tube packaging (SN74ACT244DW, MC74ACT244DWG, 74ACT244SC) is suitable for manual assembly or lower-volume applications.

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