QS3244SOG Equivalent & Substitute Parts

Part Overview

The QS3244SOG is a 4 x 1:1 bus switch logic IC manufactured by Renesas Electronics Corporation in a 20-SOIC package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The QS3244SOG operates as a single-supply bus switch with independent circuits, suitable for signal routing and multiplexing applications in digital systems.

Substiute Parts

QS3244SOG

Renesas Electronics CorporationIn Stock: 1994QS3244SOG Datasheet

Current PartRFQ

QS3244QG

Renesas Electronics CorporationIn Stock: 4919QS3244QG Datasheet

MFR RecommendedRFQ

SN74CBT3244CDW

Texas InstrumentsIn Stock: 2237SN74CBT3244CDW Datasheet

MFR RecommendedRFQ

SN74CBT3244CDWR

Texas InstrumentsIn Stock: 3009SN74CBT3244CDWR Datasheet

MFR RecommendedRFQ

SN74CBT3244DW

Texas InstrumentsIn Stock: 1984SN74CBT3244DW Datasheet

MFR RecommendedRFQ

SN74CBT3244DWR

Texas InstrumentsIn Stock: 2725SN74CBT3244DWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the QS3244SOG are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Circuit configuration: 4 x 1:1 topology with 2 independent circuits
• Voltage supply compatibility: Single supply operation
• Operating temperature range: -40°C ~ 85°C
• Mounting type: Surface mount
• RoHS3 compliance and MSL Level 1 rating

Package Compatibility Considerations: Substitutes are grouped by package type. The QS3244SOG uses a 20-SOIC package. The QS3244QG variant uses a 20-QSOP (SSOP) package with different physical dimensions (0.154" vs 0.295" width), requiring PCB layout modification. Texas Instruments SN74CBT3244 series parts maintain the 20-SOIC package footprint, enabling direct board-level substitution.

Voltage Supply Range Variations: The QS3244SOG operates within 4.75V ~ 5.25V. Texas Instruments SN74CBT3244 variants support broader ranges (4V ~ 5.5V or 4.5V ~ 5.5V), providing enhanced supply tolerance while remaining compatible with the original specification.

Parameter Comparison

Engineering Selection Recommendations

For Direct PCB Substitution (No Layout Changes): Select SN74CBT3244CDW or SN74CBT3244CDWR. Both maintain the 20-SOIC package footprint identical to the QS3244SOG, enabling direct component replacement without PCB modification. Both parts carry Active product status and ROHS3 compliance. The CDWR variant is supplied in Tape & Reel packaging for automated assembly processes.

For Active Product Status Priority: QS3244QG (Renesas) and SN74CBT3244CDW/CDWR (Texas Instruments) are classified as Active products, ensuring long-term availability and supply continuity. The QS3244QG maintains Renesas manufacturing lineage but requires PCB layout redesign due to 20-QSOP package dimensions.

For Extended Supply Tolerance: SN74CBT3244CDW, SN74CBT3244CDWR, SN74CBT3244DW, and SN74CBT3244DWR support voltage ranges of 4V ~ 5.5V or 4.5V ~ 5.5V, exceeding the original 4.75V ~ 5.25V specification. This provides operational margin in systems with variable supply conditions.

For Procurement Flexibility: All substitute parts maintain ROHS3 compliance and MSL Level 1 rating, matching the original part's environmental and regulatory qualifications. Packaging options include Tube and Tape & Reel formats to accommodate different manufacturing workflows.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT3244CDW replace QS3244SOG without PCB changes? A: Yes. Both parts use the 20-SOIC package with identical 0.295" width and 7.50mm dimensions, enabling direct footprint compatibility and board-level substitution.

Q: What is the difference between QS3244QG and SN74CBT3244CDW? A: QS3244QG uses a 20-QSOP package (0.154" width), requiring PCB layout modification. SN74CBT3244CDW maintains the 20-SOIC package, allowing direct substitution. Both are Active products with identical electrical specifications.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance and MSL Level 1 rating, matching the original QS3244SOG environmental qualifications.

Q: What is the voltage supply difference between QS3244SOG and SN74CBT3244CDW? A: QS3244SOG operates at 4.75V ~ 5.25V. SN74CBT3244CDW supports 4V ~ 5.5V, providing broader supply tolerance while remaining compatible with the original specification range.

Q: Should I select Tube or Tape & Reel packaging? A: Tube packaging (CDW, DW) is suitable for manual assembly and lower-volume applications. Tape & Reel packaging (CDWR, DWR) is optimized for automated pick-and-place assembly processes and higher production volumes.

Q: Why is QS3244SOG marked as Obsolete? A: Obsolete status indicates the part is no longer manufactured by Renesas. Active alternatives from both Renesas (QS3244QG) and Texas Instruments (SN74CBT3244 series) provide equivalent functionality with ongoing supply assurance.

Q: Are SN74CBT3244DW and SN74CBT3244DWR still available? A: Both parts carry Last Time Buy status, indicating limited remaining inventory. SN74CBT3244CDW and SN74CBT3244CDWR are recommended for new designs due to Active product status and assured long-term availability.