CBT3244AD,118 Bus Switch 4x1:1 Logic IC Equivalent & Substitute Parts

Part Overview

The CBT3244AD,118 is a 4x1:1 bus switch logic IC manufactured by Nexperia USA Inc. in a 20-SOIC surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Bus switches in the 74CBT series are used for signal routing and multiplexing applications requiring low on-resistance and minimal propagation delay. The CBT3244AD,118 provides four independent 1:1 switch circuits with single supply operation.

Substiute Parts

CBT3244AD,118

Nexperia USA Inc.In Stock: 1136CBT3244AD,118 Datasheet

Current PartRFQ

SN74CBT3244CDW

Texas InstrumentsIn Stock: 2237SN74CBT3244CDW Datasheet

SimilarRFQ

SN74CBT3244CDWR

Texas InstrumentsIn Stock: 3009SN74CBT3244CDWR Datasheet

SimilarRFQ

SN74CBT3244DW

Texas InstrumentsIn Stock: 1984SN74CBT3244DW Datasheet

SimilarRFQ

SN74CBT3244DWR

Texas InstrumentsIn Stock: 2725SN74CBT3244DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CBT3244AD,118 is determined by the following critical parameters:

• Circuit configuration: 4 x 1:1 switch topology
• Independent circuits: 2
• Package type: 20-SOIC form factor with 0.295" width and 7.50mm width specification
• Voltage supply range: Minimum 4.5V operation required
• Operating temperature: -40°C to 85°C range
• Surface mount technology
• RoHS3 compliance
• MSL rating of 1

All substitute parts listed maintain these core electrical and mechanical specifications, ensuring functional and physical compatibility. Differences in product status (Active vs. Last Time Buy) and packaging format (Tube vs. Tape & Reel) do not affect electrical substitution but may impact procurement strategy.

Parameter Comparison

Engineering Selection Recommendations

For designs currently using the CBT3244AD,118, the Texas Instruments SN74CBT3244 series parts provide direct electrical substitution. Selection among available options should prioritize product status and procurement requirements:

Active Status Parts (Recommended for new designs):

• SN74CBT3244CDW (Tube packaging)
• SN74CBT3244CDWR (Tape & Reel packaging)

These parts carry Active product status, ensuring long-term availability and manufacturing support. The extended voltage supply range (4V minimum vs. 4.5V) provides additional design margin.

Last Time Buy Parts (For existing inventory management):

• SN74CBT3244DW (Tube packaging)
• SN74CBT3244DWR (Tape & Reel packaging)

These parts maintain full electrical compatibility but operate under Last Time Buy status. Use for legacy system support or existing production runs where supply continuity is already established.

All substitute parts maintain ROHS3 compliance, MSL rating of 1, and identical 20-SOIC package geometry, ensuring PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT3244CDW replace CBT3244AD,118 in existing designs?

A: Yes. Both parts share identical circuit configuration (4 x 1:1), independent circuit count (2), operating temperature range (-40°C to 85°C), package type (20-SOIC), and compliance certifications (ROHS3, MSL 1). The SN74CBT3244CDW operates at 4V minimum supply voltage compared to 4.5V for the CBT3244AD,118, providing additional design margin. No PCB modifications are required.

Q: What is the difference between Tube and Tape & Reel packaging options?

A: Tube packaging (CDW, DW) is suitable for manual assembly and small-volume production. Tape & Reel packaging (CDWR, DWR) is optimized for automated pick-and-place assembly and high-volume manufacturing. Electrical performance and package dimensions are identical. Selection depends on assembly process requirements, not circuit functionality.

Q: Why do some substitute parts show 4V minimum supply while the original specifies 4.5V?

A: The SN74CBT3244CDW and SN74CBT3244CDWR (Active status parts) are specified with 4V minimum supply voltage. This represents a broader operating range and does not indicate reduced performance. Designs operating at 4.5V or higher are fully compatible with both specifications.

Q: Are all listed parts suitable for new product designs?

A: SN74CBT3244CDW and SN74CBT3244CDWR carry Active product status and are recommended for new designs. SN74CBT3244DW and SN74CBT3244DWR are under Last Time Buy status and should be used only for legacy system support or existing production continuity.

Q: Do substitute parts require different PCB footprints?

A: No. All substitute parts use the identical 20-SOIC package with 0.295" width and 7.50mm width specification. Existing PCB layouts require no modification for component substitution.