74FST6800QG Equivalent & Substitute Parts

Part Overview

The 74FST6800QG is a bus switch IC manufactured by Renesas Electronics Corporation, configured as a 10 x 1:1 logic switch in a 24-QSOP package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74FST6800 series provides single-supply bus switching functionality suitable for logic-level signal routing applications.

Substiute Parts

74FST6800QG

Renesas Electronics CorporationIn Stock: 109074FST6800QG Datasheet

Current PartRFQ

SN74CBT6800APWR

Texas InstrumentsIn Stock: 3150SN74CBT6800APWR Datasheet

MFR RecommendedRFQ

SN74CBT6800CDGVR

Texas InstrumentsIn Stock: 888SN74CBT6800CDGVR Datasheet

MFR RecommendedRFQ

SN74CBT6800CPWR

Texas InstrumentsIn Stock: 2186SN74CBT6800CPWR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74FST6800QG are qualified based on the following critical parameters:

• Circuit Configuration: All substitutes maintain the 10 x 1:1 bus switch topology
• Independent Circuits: All substitutes provide 1 independent circuit
• Voltage Supply Source: All substitutes use single supply architecture
• Operating Temperature Range: All substitutes support -40°C ~ 85°C operation
• Mounting Type: All substitutes are surface mount devices
• RoHS & Compliance: All substitutes maintain ROHS3 compliance and REACH unaffected status

The substitute parts are manufactured by Texas Instruments under the 74CBT6800 base product number. While package variants differ (24-TSSOP and 24-TVSOP versus the original 24-QSOP), the electrical functionality and pin configuration remain equivalent. Package differences reflect manufacturing and availability considerations rather than functional divergence.

Parameter Comparison

Engineering Selection Recommendations

SN74CBT6800CPWR is the primary substitute for new designs and production. This part maintains active product status with Texas Instruments, ensuring long-term availability and supply chain stability. It is supplied in Tape & Reel packaging and is available in quantities supporting production requirements.

SN74CBT6800CDGVR is an alternative substitute with active product status, supplied in Tape & Reel format with a 24-TFSOP package variant. This option provides equivalent functionality with different package geometry.

SN74CBT6800APWR carries Last Time Buy status, indicating limited future availability. This part is suitable for legacy system maintenance but should not be selected for new production designs.

All three substitutes are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. Package differences between the original 24-QSOP and substitute 24-TSSOP/24-TFSOP variants require PCB layout verification to confirm mechanical fit and thermal performance in the target application.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT6800CPWR directly replace 74FST6800QG in existing designs?

A: Electrical functionality is equivalent. However, package geometry differs (24-TSSOP versus 24-QSOP), requiring PCB footprint verification. Pin configuration and signal routing remain compatible.

Q: What is the difference between SN74CBT6800CPWR and SN74CBT6800CDGVR?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is package variant: SN74CBT6800CPWR uses 24-TSSOP while SN74CBT6800CDGVR uses 24-TFSOP. Selection depends on PCB layout requirements and available footprint space.

Q: Why is the original 74FST6800QG obsolete?

A: The 74FST6800QG is classified as obsolete by Renesas Electronics. Texas Instruments continues to manufacture equivalent functionality under the 74CBT6800 product line, which serves as the industry standard replacement.

Q: Are all substitutes RoHS compliant?

A: Yes. The 74FST6800QG and all three substitute parts are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting current environmental and regulatory standards.

Q: Which substitute should be selected for new production?

A: SN74CBT6800CPWR is recommended for new production due to active product status and established supply chain availability. SN74CBT6800CDGVR is an acceptable alternative if the 24-TFSOP package geometry is preferred.