SN74BCT244DW Equivalent & Substitute Parts

Part Overview

The SN74BCT244DW is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, designed for 2 element, 4-bit per element configurations with 3-state output capability. This device operates across a 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package. The SN74BCT244DW 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 project viability when the primary part reaches end-of-life status.

Substiute Parts

SN74BCT244DW

Texas InstrumentsIn Stock: 2257SN74BCT244DW Datasheet

Current PartRFQ

SN74BCT244DWR

Texas InstrumentsIn Stock: 735SN74BCT244DWR Datasheet

MFR RecommendedRFQ

SN74AS244ADW

Texas InstrumentsIn Stock: 1197SN74AS244ADW 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 SN74BCT244DW are qualified based on strict electrical and mechanical parameter matching. All substitute candidates maintain identical functional specifications across the following critical parameters:

• 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)

Substitutes are differentiated by series designation (74BCT, 74AS, 74F), packaging format (Tube vs. Tape & Reel), and product lifecycle status. All qualified substitutes are manufactured by Texas Instruments and share identical pinout and functional behavior within the specified operating parameters.

Parameter Comparison

Engineering Selection Recommendations

For applications currently using SN74BCT244DW, the following selection criteria apply based on product lifecycle and compliance status:

Primary Substitute (Recommended for New Designs): SN74F241DW is the preferred substitute, offering Active product status with assured long-term availability and 2300 units in current inventory. This part maintains all electrical and mechanical specifications identical to the SN74BCT244DW while providing superior supply chain continuity.

Alternative Substitute (Same Series, Different Packaging): SN74BCT244DWR provides direct series continuity with Active product status. This part is functionally identical to SN74BCT244DW but supplied in Tape & Reel packaging format, suitable for automated assembly environments. Inventory availability is 641 units.

Secondary Substitutes (Last Time Buy Status): SN74AS244ADW and SN74F244DW are parametrically equivalent but carry Last Time Buy designation, indicating limited future availability. These parts are suitable for existing design maintenance but not recommended for new product development.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical electrical performance within specified operating parameters.

Frequently Asked Questions (FAQ)

Q: Can SN74BCT244DW be directly replaced with SN74F241DW?

A: Yes. Both parts share identical logic type (Buffer, Non-Inverting), element configuration (2 elements, 4 bits per element), output type (3-State), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and 20-SOIC package specification. Pinout and functional behavior are equivalent.

Q: What is the difference between SN74BCT244DW and SN74BCT244DWR?

A: Both parts are from the 74BCT series with identical electrical specifications. The primary difference is packaging format: SN74BCT244DW is supplied in Tube packaging, while SN74BCT244DWR is supplied in Tape & Reel format. SN74BCT244DWR also carries Active product status compared to Last Time Buy for the DW variant.

Q: Why is SN74F241DW recommended over SN74AS244ADW?

A: SN74F241DW carries Active product status with 2300 units in inventory, ensuring long-term availability and supply chain stability. SN74AS244ADW is designated Last Time Buy with lower inventory (1093 units), indicating limited future production. Both are parametrically equivalent; the recommendation is based on lifecycle status and availability assurance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (SN74BCT244DWR, SN74AS244ADW, SN74F244DW, SN74F241DW) maintain ROHS3 compliance and MSL Level 1 rating, matching the original SN74BCT244DW specification.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes, provided the PCB design accommodates the 20-SOIC package format. All substitute parts use identical pinout and package dimensions (0.295", 7.50mm Width). Packaging format differences (Tube vs. Tape & Reel) affect only procurement and assembly processes, not PCB compatibility.

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

A: Last Time Buy designation indicates the manufacturer will discontinue production after current inventory is depleted. Parts with this status should be evaluated for replacement in new designs. For existing products, Last Time Buy parts remain functionally valid but require transition planning to Active alternatives.