SN74LS244DW Equivalent & Substitute Parts

Part Overview

The SN74LS244DW is a Buffer, Non-Inverting logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability in a 20-SOIC surface mount package. This component operates within the 4.75V to 5.25V supply voltage range and is rated for 0°C to 70°C operating temperature. The SN74LS244DW is classified as Last Time Buy, indicating limited future availability. Identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and ensuring uninterrupted production schedules.

Substiute Parts

SN74LS244DW

Texas InstrumentsIn Stock: 2000239SN74LS244DW Datasheet

Current PartRFQ

SN74LS244DWR

Texas InstrumentsIn Stock: 9925SN74LS244DWR Datasheet

MFR RecommendedRFQ

SN74LS241DW

Texas InstrumentsIn Stock: 1515SN74LS241DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74LS244DW are identified based on strict electrical and mechanical parameter matching within the 74LS logic family. The 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: 4.75V ~ 5.25V
• Operating Temperature: 0°C ~ 70°C (TA)
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Substitute Categories:

1. MFR Recommended Substitute (SN74LS244DWR): Identical electrical and functional specifications with different packaging format (Cut Tape & Digi-Reel® versus Tube). Active product status ensures ongoing availability.

2. Parametric Equivalent (SN74LS241DW): Meets all critical electrical and mechanical parameters. Operates within identical voltage and temperature ranges with matching output current specifications. Packaged in 20-SOIC surface mount configuration. Last Time Buy status applies.

Parameter Comparison

Engineering Selection Recommendations

SN74LS244DWR is the primary recommended substitute for the SN74LS244DW. Both parts are electrically and functionally identical with matching 20-SOIC package specifications. The key distinction is packaging format: SN74LS244DWR is supplied in Cut Tape & Digi-Reel® format, while SN74LS244DW is supplied in Tube format. SN74LS244DWR holds Active product status, ensuring continued manufacturing and availability, making it the optimal choice for long-term supply chain requirements.

SN74LS241DW serves as a parametric equivalent with identical electrical performance, output current ratings, voltage supply range, and operating temperature specifications. Both SN74LS244DW and SN74LS241DW share Last Time Buy status. SN74LS241DW is suitable for applications where the specific base product number variant is interchangeable within the design constraints.

All three parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Frequently Asked Questions (FAQ)

Q: Can SN74LS244DWR directly replace SN74LS244DW in production?

A: Yes. SN74LS244DWR is electrically and functionally identical to SN74LS244DW. The only difference is packaging format: SN74LS244DWR uses Cut Tape & Digi-Reel® packaging while SN74LS244DW uses Tube packaging. Both are 20-SOIC surface mount packages with identical pin configurations and electrical specifications.

Q: What is the difference between SN74LS244DW and SN74LS241DW?

A: Both parts are Buffer, Non-Inverting logic ICs with identical electrical specifications: 2 elements, 4 bits per element, 3-state output, 15mA/24mA output current, 4.75V–5.25V supply voltage, and 0°C–70°C operating temperature. Both use 20-SOIC surface mount packaging. The primary difference is the base product number designation (74LS244 versus 74LS241).

Q: Why is SN74LS244DW marked as Last Time Buy?

A: Last Time Buy status indicates that Texas Instruments has discontinued or will discontinue production of this part number. Customers should transition to active alternatives such as SN74LS244DWR to ensure long-term supply availability.

Q: Are all three parts RoHS compliant?

A: Yes. SN74LS244DW, SN74LS244DWR, and SN74LS241DW are all ROHS3 compliant and suitable for applications requiring RoHS certification.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.