QS3244SOG8 Equivalent & Substitute Parts

Part Overview

The QS3244SOG8 is a bus switch IC manufactured by Renesas Electronics Corporation, configured as a 4 x 1:1 multiplexer in a 20-SOIC package. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The QS3244SOG8 operates as a single-supply logic switch suitable for applications requiring bus multiplexing and signal routing in digital systems.

Substiute Parts

QS3244SOG8

Renesas Electronics CorporationIn Stock: 994QS3244SOG8 Datasheet

Current PartRFQ

QS3244QG8

Renesas Electronics CorporationIn Stock: 9795QS3244QG8 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 QS3244SOG8 are qualified based on the following critical parameters:

Functional Equivalence: All substitute parts maintain the 4 x 1:1 bus switch configuration with 2 independent circuits, ensuring identical functional behavior.

Package Compatibility: Substitutes are grouped into two package categories:

• 20-SOIC package (same as original): Direct pin-compatible replacements
• 20-QSOP/20-SSOP package (smaller footprint): Functionally equivalent but requires PCB layout modification

Electrical Specifications: All substitutes operate within overlapping supply voltage ranges (4V to 5.5V) and maintain the -40°C to 85°C operating temperature range.

Compliance & Status: All substitutes are ROHS3 compliant with MSL 1 rating, ensuring equivalent environmental and reliability characteristics.

Parameter Comparison

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (20-SOIC Package):

The SN74CBT3244CDW and SN74CBT3244CDWR from Texas Instruments are active products with identical 20-SOIC packaging. These parts provide the most straightforward substitution path with no PCB modifications required. Both maintain ROHS3 compliance and MSL 1 rating. The CDWR variant in Tape & Reel packaging is preferred for production environments requiring automated assembly.

For Compact Form Factor (20-QSOP Package):

The QS3244QG8 from Renesas offers an active product status with reduced package footprint (20-QSOP). This option requires PCB layout redesign but maintains the same manufacturer lineage and electrical specifications as the original QS3244SOG8.

For Extended Availability:

The SN74CBT3244CDWR provides the highest current inventory (2948 pcs) among active 20-SOIC options, supporting sustained production requirements.

Avoid Last Time Buy Status:

The SN74CBT3244DW and SN74CBT3244DWR carry Last Time Buy status, indicating limited future availability. These should be considered only for legacy system maintenance where no other alternatives are viable.

Frequently Asked Questions (FAQ)

Q: Can I use QS3244QG8 as a direct replacement for QS3244SOG8?

A: The QS3244QG8 is functionally equivalent but uses a different package (20-QSOP vs. 20-SOIC). Pin assignments differ, requiring PCB layout modification. Direct socket substitution is not possible.

Q: What is the primary difference between SN74CBT3244CDW and SN74CBT3244CDWR?

A: Both parts are identical in electrical specifications and 20-SOIC packaging. The difference is packaging format: CDW is supplied in Tube, while CDWR is supplied in Tape & Reel. CDWR is recommended for automated assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 rating, matching the environmental and reliability standards of the original QS3244SOG8.

Q: What is the voltage supply overlap between QS3244SOG8 and Texas Instruments substitutes?

A: The QS3244SOG8 operates at 4.75V ~ 5.25V. Texas Instruments SN74CBT3244 variants operate at 4V ~ 5.5V (CDW/CDWR) or 4.5V ~ 5.5V (DW/DWR). The common operating range is 4.75V ~ 5.25V, ensuring compatibility in standard 5V logic applications.

Q: Why is QS3244SOG8 marked as obsolete?

A: Obsolete status indicates the part is no longer manufactured by Renesas. Active substitutes from both Renesas (QS3244QG8) and Texas Instruments (SN74CBT3244 series) provide equivalent functionality for new designs and production continuity.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided they are used in identical circuit positions. All listed substitutes maintain the same 4 x 1:1 configuration, independent circuit count, and operating temperature range. Verify voltage supply compatibility with your system design.