SN74AS244ADW Equivalent & Substitute Parts

Part Overview

The SN74AS244ADW is a non-inverting buffer logic IC manufactured by Texas Instruments, featuring 2 elements with 4 bits per element and 3-state output capability. This 20-SOIC surface mount device operates across a 4.5V to 5.5V supply range and is designed for digital signal buffering applications requiring controlled output impedance and tri-state logic control.

The SN74AS244ADW carries a Last Time Buy product status, indicating discontinued production. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for existing applications and new designs.

Substiute Parts

SN74AS244ADW

Texas InstrumentsIn Stock: 1197SN74AS244ADW Datasheet

Current PartRFQ

SN74AS244ADWR

Texas InstrumentsIn Stock: 879SN74AS244ADWR Datasheet

MFR RecommendedRFQ

SN74BCT244DW

Texas InstrumentsIn Stock: 2257SN74BCT244DW Datasheet

Parametric EquivalentRFQ

SN74F241DW

Texas InstrumentsIn Stock: 2349SN74F241DW Datasheet

Parametric EquivalentRFQ

SN74F244DW

Texas InstrumentsIn Stock: 2747SN74F244DW Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74AS244ADW are qualified based on strict electrical and mechanical parameter matching:

Qualifying 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, 64mA
• 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
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts listed maintain identical electrical specifications and physical packaging, ensuring direct functional equivalence. Substitutes are differentiated by series designation (74AS, 74BCT, 74F) and product status (Active or Last Time Buy).

Parameter Comparison

Engineering Selection Recommendations

SN74AS244ADWR (MFR Recommended Substitute)

The SN74AS244ADWR is the manufacturer-recommended equivalent, maintaining identical electrical and mechanical specifications to the SN74AS244ADW. The primary distinction is packaging format: SN74AS244ADWR is supplied in Tape & Reel (TR) configuration versus Tube packaging for the original part. Both carry ROHS3 compliance and MSL Level 1 rating. The SN74AS244ADWR holds Active product status, ensuring continued availability and manufacturing support.

SN74BCT244DW (Parametric Equivalent)

The SN74BCT244DW provides full parametric equivalence with identical electrical performance and 20-SOIC packaging. This part operates within the same voltage and temperature ranges with matching output current specifications. The 74BCT series designation indicates BCT logic family technology. Current inventory availability is 2172 units. Product status is Last Time Buy.

SN74F241DW (Parametric Equivalent)

The SN74F241DW delivers complete electrical and mechanical compatibility with the SN74AS244ADW. The 74F series represents Fast logic family technology. This part maintains Active product status with 2300 units in current inventory, supporting long-term design continuity.

SN74F244DW (Parametric Equivalent)

The SN74F244DW is a parametric equivalent within the 74F Fast logic family, offering identical electrical specifications and 20-SOIC surface mount packaging. Current inventory includes 2700 units. Product status is Last Time Buy.

All substitute parts are ROHS3 compliant and carry MSL Level 1 rating, meeting environmental and reliability requirements equivalent to the original part.

Frequently Asked Questions (FAQ)

Q: Can SN74AS244ADWR be used as a direct replacement for SN74AS244ADW?

A: Yes. SN74AS244ADWR is the manufacturer-recommended equivalent with identical electrical specifications, operating parameters, and 20-SOIC packaging. The only difference is packaging format: SN74AS244ADWR uses Tape & Reel (TR) supply while SN74AS244ADW uses Tube packaging. Both are functionally interchangeable at the circuit level.

Q: What is the difference between 74AS, 74BCT, and 74F series buffers?

A: The series designation indicates the logic family technology. 74AS represents Advanced Schottky, 74BCT represents BiCMOS Technology, and 74F represents Fast logic. All three families maintain identical electrical specifications for this buffer configuration: 4.5V to 5.5V supply, 15mA/64mA output current, and 0°C to 70°C operating temperature range.

Q: Are all listed substitutes compatible with existing PCB designs?

A: Yes. All substitute parts use identical 20-SOIC (0.295", 7.50mm Width) surface mount packaging with the same pin configuration and electrical characteristics. No PCB layout modifications are required for substitution.

Q: What does Last Time Buy product status mean?

A: Last Time Buy indicates the manufacturer has discontinued production and will not accept new orders after a specified date. Existing inventory may still be available. For long-term design continuity, consider parts with Active status such as SN74AS244ADWR or SN74F241DW.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL Level 1 (Unlimited) moisture sensitivity rating, meeting environmental and reliability standards equivalent to the original SN74AS244ADW.

Q: Can I mix different series (74AS, 74BCT, 74F) in the same design?

A: Yes. All listed parts maintain identical electrical specifications for supply voltage, operating temperature, output current, and logic function. They are electrically interchangeable within the same circuit application.