FST16861MTD Bus Switch 10 x 1:1 Equivalent & Substitute Parts

Part Overview

The FST16861MTD is a bus switch IC manufactured by onsemi, featuring a 10 x 1:1 circuit configuration in a 48-TSSOP package. This logic component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The FST16861MTD operates with single supply voltage between 4V and 5.5V across an operating temperature range of -40°C to 85°C, suitable for surface mount applications requiring bus switching functionality.

Substiute Parts

FST16861MTD

onsemiIn Stock: 836FST16861MTD Datasheet

Current PartRFQ

SN74CBT16861DGGR

Texas InstrumentsIn Stock: 1980SN74CBT16861DGGR Datasheet

DirectRFQ

SN74CBT16861DGVR

Texas InstrumentsIn Stock: 2281SN74CBT16861DGVR Datasheet

SimilarRFQ

SN74CBT16861DLR

Texas InstrumentsIn Stock: 4491SN74CBT16861DLR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the FST16861MTD are qualified based on the following criteria:

Functional Equivalence: All substitute parts maintain the same 10 x 1:1 bus switch circuit configuration with 2 independent circuits, ensuring functional compatibility at the application level.

Electrical Parameters: Substitute parts operate within compatible voltage supply ranges (4.5V ~ 5.5V for Texas Instruments variants, which overlaps with the FST16861MTD specification of 4V ~ 5.5V). Operating temperature range remains -40°C to 85°C across all variants.

Mechanical Compatibility: Substitutes are available in three package variants—48-TFSOP, 48-TVSOP, and 48-SSOP—all maintaining the same pin count and surface mount technology. Package width variations (6.10mm, 4.40mm, and 7.50mm respectively) must be evaluated for PCB layout compatibility.

Compliance & Status: All Texas Instruments substitutes carry Last Time Buy status with RoHS3 compliance, providing regulatory assurance for new designs. The onsemi FST16861MTD is obsolete, making these substitutes the primary path forward for procurement.

Parameter Comparison

Engineering Selection Recommendations

SN74CBT16861DGGR is the primary direct substitute, offering identical package dimensions (48-TFSOP, 6.10mm width) to the FST16861MTD. This variant minimizes PCB layout modifications and is available in Cut Tape packaging. RoHS3 compliance and Last Time Buy status provide regulatory assurance for new production designs.

SN74CBT16861DGVR provides functional equivalence with a narrower package footprint (48-TFSOP, 4.40mm width). This variant is suitable for space-constrained applications where PCB layout can accommodate the reduced width. Higher inventory availability (2200 pcs) supports immediate procurement needs.

SN74CBT16861DLR offers the widest package (48-BSSOP, 7.50mm width) and is supplied in Tape & Reel format. This variant supports high-volume production environments and provides the largest available inventory (4400 pcs). Package width increase requires PCB layout verification.

All three Texas Instruments substitutes maintain functional compatibility with the FST16861MTD while providing improved product lifecycle status and regulatory compliance. Selection should prioritize package compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT16861DGVR replace FST16861MTD directly on the PCB?

A: Functional replacement is supported. However, the SN74CBT16861DGVR uses a 48-TFSOP package with 4.40mm width compared to the FST16861MTD's 6.10mm width. PCB footprint verification is required before assembly.

Q: What is the voltage supply difference between FST16861MTD and the Texas Instruments substitutes?

A: The FST16861MTD operates at 4V ~ 5.5V, while Texas Instruments variants operate at 4.5V ~ 5.5V. The 0.5V lower limit difference is acceptable for most 5V logic applications. Designs operating below 4.5V require the original FST16861MTD or equivalent onsemi parts.

Q: Are all substitute parts RoHS compliant?

A: All three Texas Instruments substitutes (SN74CBT16861DGGR, SN74CBT16861DGVR, SN74CBT16861DLR) are ROHS3 compliant. The original FST16861MTD RoHS status is not specified in available documentation.

Q: Which substitute offers the best inventory availability?

A: SN74CBT16861DLR provides the highest inventory (4400 pcs) and is supplied in Tape & Reel format, supporting high-volume production. SN74CBT16861DGVR offers 2200 pcs in Cut Tape format for smaller volume requirements.

Q: Do all substitutes maintain the same operating temperature range?

A: Yes, all substitutes maintain the -40°C to 85°C operating temperature range, ensuring thermal compatibility with the original FST16861MTD specification.

Q: What packaging format should I select for my application?

A: Cut Tape (CT) packaging suits lower-volume or prototype applications. Tape & Reel (TR) packaging is optimized for automated assembly in production environments. Package selection depends on manufacturing volume and assembly process requirements.