SN74BCT240DBR Equivalent & Substitute Parts

Part Overview

The SN74BCT240DBR is an inverting buffer IC manufactured by Texas Instruments, designed for logic signal buffering and inversion applications. This device features 2 elements with 4 bits per element and 3-state output capability in a 20-SSOP surface mount package. The part is classified as Obsolete, making identification of compatible substitute components essential for ongoing system support and procurement planning.

Substiute Parts

SN74BCT240DBR

Texas InstrumentsIn Stock: 3097SN74BCT240DBR Datasheet

Current PartRFQ

SN74F240DBR

Texas InstrumentsIn Stock: 957SN74F240DBR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SN74BCT240DBR is determined by strict equivalence across the following critical parameters:

• Logic Type: Buffer, Inverting (functional equivalence)
• Number of Elements: 2 (channel count)
• Number of Bits per Element: 4 (bit width per channel)
• Output Type: 3-State (output configuration)
• Current - Output High, Low: 15mA, 64mA (drive capability)
• Voltage - Supply: 4.5V ~ 5.5V (power supply range)
• Operating Temperature: 0°C ~ 70°C (TA) (thermal operating range)
• Package / Case: 20-SSOP (0.209", 5.30mm Width) (physical and electrical footprint)
• Mounting Type: Surface Mount (assembly compatibility)

The SN74F240DBR meets all substitution criteria as a parametric equivalent, maintaining identical functional specifications and package compatibility while differing only in product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The SN74F240DBR serves as a direct parametric substitute for the SN74BCT240DBR. Both devices maintain identical electrical specifications, thermal operating ranges, and physical package dimensions. Both components are ROHS3 compliant and REACH unaffected, satisfying regulatory requirements for modern manufacturing environments.

Selection between these parts should be based on availability and procurement status. The SN74BCT240DBR is classified as Obsolete, while the SN74F240DBR is listed as Discontinued at DiGi Electronics. Inventory availability and supply chain considerations should guide component selection for new designs or system maintenance.

Frequently Asked Questions (FAQ)

Q: Can the SN74F240DBR replace the SN74BCT240DBR in existing designs?

A: Yes. The SN74F240DBR is a parametric equivalent with identical logic type, element count, bit width, output configuration, drive current, supply voltage range, operating temperature range, and package footprint. Direct substitution is electrically and mechanically compatible.

Q: Are there differences in packaging format between these parts?

A: The SN74BCT240DBR is supplied in standard packaging, while the SN74F240DBR is supplied in Tape & Reel (TR) format. Both use the same 20-SSOP physical package. Tape & Reel format is standard for automated assembly processes.

Q: Do both parts meet current regulatory compliance standards?

A: Yes. Both the SN74BCT240DBR and SN74F240DBR are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the product status difference?

A: The SN74BCT240DBR is classified as Obsolete, indicating it is no longer manufactured or supported by Texas Instruments. The SN74F240DBR is Discontinued at DiGi Electronics, indicating limited or no current availability through this distributor. Both statuses reflect end-of-life status and may affect long-term procurement availability.

Q: Are the electrical characteristics identical between these parts?

A: Yes. Both parts share identical output current specifications (15mA high, 64mA low), supply voltage range (4.5V ~ 5.5V), and operating temperature range (0°C ~ 70°C TA).