FST3126DTR2G Equivalent & Substitute Parts

Part Overview

The FST3126DTR2G is a bus switch IC manufactured by onsemi, designed for 1 x 1:1 switching applications in logic circuits. This component features a 14-TSSOP surface mount package and operates across a single supply voltage range of 4V to 5.5V with an operating temperature range of -55°C to 125°C. The part is classified as obsolete, making identification of equivalent and substitute components essential for ongoing system support and procurement planning.

Substiute Parts

FST3126DTR2G

onsemiIn Stock: 972FST3126DTR2G Datasheet

Current PartRFQ

FST3125DTR2G

onsemiIn Stock: 895FST3125DTR2G Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FST3126DTR2G is determined by strict equivalence across the following critical parameters:

• Circuit configuration (1 x 1:1 topology with 4 independent circuits)
• Package type and physical dimensions (14-TSSOP, 0.173" width, 4.40mm)
• Voltage supply specifications (single supply, 4V to 5.5V range)
• Operating temperature range (-55°C to 125°C)
• Surface mount mounting type
• Compliance certifications (ROHS3, REACH Unaffected, EAR99)

The FST3125DTR2G meets all these criteria and qualifies as a parametric equivalent substitute for the FST3126DTR2G.

Parameter Comparison

Engineering Selection Recommendations

Both the FST3126DTR2G and FST3125DTR2G are obsolete products from onsemi. Selection between these components is based on availability and compliance requirements. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory standards. The identical electrical specifications, package dimensions, and thermal operating ranges ensure direct functional interchangeability in existing circuit designs. Procurement decisions should prioritize inventory availability and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can FST3125DTR2G replace FST3126DTR2G in existing designs? A: Yes. The FST3125DTR2G is a parametric equivalent with identical circuit configuration, voltage specifications, temperature range, and 14-TSSOP package dimensions. Direct substitution is supported without circuit modification.

Q: Are there any package compatibility concerns? A: No. Both parts use the 14-TSSOP package with identical physical dimensions (0.173" width, 4.40mm). PCB footprints and assembly processes remain unchanged.

Q: What is the significance of the obsolete product status? A: Both parts are classified as obsolete, indicating they are no longer in active production. Substitute selection should prioritize available inventory from authorized distributors. Current inventory levels are FST3126DTR2G: 868 Pcs and FST3125DTR2G: 827 Pcs.

Q: Do compliance certifications differ between these parts? A: No. Both parts maintain identical ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification.

Q: Are voltage and temperature specifications identical? A: Yes. Both parts operate on single supply voltage (4V to 5.5V) and share the same operating temperature range (-55°C to 125°C).