SN74BCT244DWR Equivalent & Substitute Parts

Part Overview

The SN74BCT244DWR is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments. This device functions as a 2-element, 4-bit per element buffer with 3-state output capability, housed in a 20-SOIC surface mount package. The part is currently in active production status with 641 units available in new original inventory. Substitute parts are identified when design requirements necessitate alternative sourcing due to inventory constraints, supply chain considerations, or specific packaging preferences while maintaining functional and electrical compatibility.

Substiute Parts

SN74BCT244DWR

Texas InstrumentsIn Stock: 735SN74BCT244DWR Datasheet

Current PartRFQ

SN74AS244ADWR

Texas InstrumentsIn Stock: 879SN74AS244ADWR Datasheet

Parametric EquivalentRFQ

SN74F244DWR

Texas InstrumentsIn Stock: 7819SN74F244DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74BCT244DWR are qualified based on strict parametric equivalence across the following criteria:

Critical Matching Parameters:

• Logic type: Buffer, Non-Inverting
• Number of elements: 2
• Number of bits per element: 4
• Output type: 3-State
• Current specifications: 15mA (output high), 64mA (output low)
• Supply voltage range: 4.5V ~ 5.5V
• Operating temperature range: 0°C ~ 70°C (TA)
• Package type: 20-SOIC (0.295", 7.50mm Width)
• Mounting type: Surface Mount
• RoHS compliance: ROHS3 Compliant
• MSL rating: 1 (Unlimited)

The identified substitute parts SN74AS244ADWR and SN74F244DWR meet all critical electrical and mechanical parameters. Differences exist only in series designation (74AS and 74F respectively) and packaging format (Tape & Reel versus Cut Tape & Digi-Reel), which do not affect functional compatibility or electrical performance in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—SN74BCT244DWR, SN74AS244ADWR, and SN74F244DWR—are active production devices from Texas Instruments with identical electrical specifications and package geometry. Selection between these parts should be based on:

Availability: SN74F244DWR offers the highest inventory level at 7783 units, followed by SN74AS244ADWR at 803 units, and SN74BCT244DWR at 641 units.

Packaging Requirements: SN74BCT244DWR and SN74AS244ADWR are supplied in Tape & Reel format, while SN74F244DWR is available in Cut Tape and Digi-Reel format. Packaging selection depends on production volume and assembly equipment compatibility.

Compliance: All parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory compatibility across all three options.

Frequently Asked Questions (FAQ)

Q: Can SN74AS244ADWR or SN74F244DWR be used as direct replacements for SN74BCT244DWR?

A: Yes. Both parts are parametric equivalents with identical electrical characteristics, output specifications, supply voltage range, operating temperature range, and 20-SOIC package dimensions. Direct pin-for-pin substitution is supported.

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

A: Series designation indicates the logic family within the TTL/CMOS architecture. For these buffer devices, the series designation does not affect functional performance or electrical compatibility when all other parameters are matched.

Q: Does packaging format affect circuit performance?

A: No. Tape & Reel and Cut Tape & Digi-Reel formats are supply and handling methods only. The integrated circuit itself and its electrical performance remain identical regardless of packaging format.

Q: Are all three parts suitable for new designs?

A: Yes. All three parts carry active product status from Texas Instruments, indicating ongoing manufacturing support and availability for new design implementations.

Q: What should guide the selection between these three equivalent parts?

A: Selection should be based on inventory availability for your required quantity, packaging format compatibility with your assembly process, and lead time requirements. Electrical and mechanical performance are equivalent across all three options.