SN74LS244DWE4 Equivalent & Substitute Parts

Part Overview

The SN74LS244DWE4 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 component is classified as discontinued at DiGi Electronics, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity. The part operates within a 4.75V to 5.25V supply voltage range and is housed in a 20-SOIC surface mount package.

Substiute Parts

SN74LS244DWE4

Texas InstrumentsIn Stock: 767SN74LS244DWE4 Datasheet

Current PartRFQ

SN74LS241DW

Texas InstrumentsIn Stock: 1515SN74LS241DW Datasheet

Parametric EquivalentRFQ

SN74LS244DW

Texas InstrumentsIn Stock: 2000239SN74LS244DW Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS244DWE4 are identified based on strict parametric equivalence across the following critical criteria:

• 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: 4.75V ~ 5.25V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts meeting all these parameters are classified as parametric equivalents and can be used interchangeably in circuit designs requiring the SN74LS244DWE4.

Parameter Comparison

Engineering Selection Recommendations

Both SN74LS241DW and SN74LS244DW meet all parametric requirements for substitution with the SN74LS244DWE4. Selection between these alternatives should be based on the following factors:

SN74LS244DW is the manufacturer-recommended substitute, with significantly higher inventory availability (2,000,200 pcs) compared to SN74LS241DW (1,456 pcs). Both parts carry Last Time Buy status, indicating limited future availability. Both maintain ROHS3 compliance and identical electrical specifications. The 20-SOIC package and surface mount configuration are consistent across all three parts, ensuring PCB layout compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN74LS241DW and SN74LS244DW be used interchangeably with SN74LS244DWE4?

A: Yes. Both parts meet all parametric requirements including logic type, element count, bit configuration, output type, current ratings, supply voltage, operating temperature, package specification, and compliance certifications.

Q: Are there any package or pinout differences between these substitutes?

A: No. All three parts use the identical 20-SOIC (0.295", 7.50mm Width) surface mount package, ensuring direct PCB compatibility without layout modifications.

Q: What is the difference between SN74LS241DW and SN74LS244DW?

A: Both parts are parametrically equivalent to the SN74LS244DWE4. The primary distinction is inventory availability, with SN74LS244DW offering substantially higher stock levels.

Q: Are these parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting environmental and regulatory requirements.

Q: What is the significance of "Last Time Buy" status?

A: Last Time Buy indicates that the manufacturer will no longer produce these parts after a specified date. Procurement planning should account for this limited availability window.