DM74ALS244AWMX Equivalent & Substitute Parts

Part Overview

The DM74ALS244AWMX is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This device operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	DM74ALS244AWMX
Manufacturer	onsemi
Series	74ALS
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
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 (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the DM74ALS244AWMX are classified based on strict electrical and mechanical compatibility. The primary substitution criteria are:

Critical Parameters for Substitution:

Logic Type: Buffer, Non-Inverting
Number of Elements: 2
Number of Bits per Element: 4
Output Type: 3-State
Current - Output High, Low: 15mA, 24mA
Voltage - Supply: 4.5V ~ 5.5V
Operating Temperature: 0°C ~ 70°C (TA)
Series: 74ALS
Mounting Type: Surface Mount

Package Compatibility:

Primary package: 20-SOIC (0.295", 7.50mm Width)
Alternative package: 20-SO (0.209", 5.30mm Width) - mechanically compatible with same pinout

All substitute parts listed maintain identical electrical specifications and functional characteristics. Package variations are noted where applicable.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Elements	Bits/Element	Output Type	Current (High/Low)	Supply Voltage	Temp Range	Package	Product Status
DM74ALS244AWMX	onsemi	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SOIC (7.50mm)	Obsolete
SN74ALS244CDW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SOIC (7.50mm)	Last Time Buy
SN74ALS244C-1DW	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SOIC (7.50mm)	Last Time Buy
SN74ALS244C-1NSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SO (5.30mm)	Active
SN74ALS244CNSR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SO (5.30mm)	Active
SN74ALS241CDWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SOIC (7.50mm)	Active
SN74ALS244C-1DWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SOIC (7.50mm)	Active
SN74ALS244CDWR	Texas Instruments	Buffer, Non-Inverting	2	4	3-State	15mA, 24mA	4.5V ~ 5.5V	0°C ~ 70°C	20-SOIC (7.50mm)	Active

Engineering Selection Recommendations

For Immediate Replacement (Obsolete Status): SN74ALS244C-1DWR and SN74ALS244CDWR are recommended as primary substitutes. Both are manufactured by Texas Instruments, maintain active product status, and are available in the standard 20-SOIC (7.50mm Width) package matching the original DM74ALS244AWMX footprint. These parts carry ROHS3 compliance and identical electrical specifications.

For Last Time Buy Scenarios: SN74ALS244CDW and SN74ALS244C-1DW are classified as Last Time Buy by Texas Instruments. These parts are electrically equivalent but have limited availability and should be considered only when active alternatives are unavailable.

For Package-Constrained Applications: SN74ALS244C-1NSR and SN74ALS244CNSR are active alternatives in the 20-SO (0.209", 5.30mm Width) package. These parts maintain identical electrical performance but feature a narrower package width. Selection depends on PCB layout constraints and mechanical compatibility with existing designs.

For Base Number Variants: SN74ALS241CDWR is a parametric equivalent with identical electrical and mechanical specifications but carries the 74ALS241 base product number. This part is active and available in the standard 20-SOIC package.

All recommended substitutes carry REACH Unaffected status and EAR99 classification, matching the regulatory profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can SN74ALS244C-1NSR be used as a direct replacement for DM74ALS244AWMX? A: SN74ALS244C-1NSR is electrically equivalent but uses a 20-SO package (0.209", 5.30mm Width) instead of the 20-SOIC package (0.295", 7.50mm Width) of the original part. PCB footprint compatibility must be verified before substitution.

Q: What is the difference between SN74ALS244CDW and SN74ALS244C-1DW? A: Both parts are electrically identical with matching electrical specifications, supply voltage, current ratings, and operating temperature. The primary difference is product status: SN74ALS244CDW and SN74ALS244C-1DW are both Last Time Buy. Selection should be based on packaging availability and supplier inventory.

Q: Are all substitute parts RoHS compliant? A: All Texas Instruments substitute parts listed carry ROHS3 Compliant status. The original onsemi part does not specify RoHS compliance in the provided data.

Q: Can SN74ALS241CDWR replace DM74ALS244AWMX? A: SN74ALS241CDWR is a parametric equivalent with identical electrical specifications, output current ratings, supply voltage, and operating temperature. The base product number differs (74ALS241 vs. 74ALS244), but functional characteristics remain equivalent for this application.

Q: What packaging options are available for active substitutes? A: Active substitutes are available in two package configurations: 20-SOIC (0.295", 7.50mm Width) for SN74ALS244C-1DWR, SN74ALS244CDWR, and SN74ALS241CDWR; and 20-SO (0.209", 5.30mm Width) for SN74ALS244C-1NSR and SN74ALS244CNSR. Package selection depends on PCB design requirements and mechanical constraints.

Q: What is the MSL rating for substitute parts? A: All substitute parts carry MSL 1 (Unlimited) rating, matching the original DM74ALS244AWMX specification.

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