FSA1157P6 Equivalent & Substitute Parts

Part Overview

The FSA1157P6 is a single-circuit IC switch with SPST-NC (Single Pole Single Throw - Normally Closed) configuration manufactured by onsemi. This component operates as a 1:1 multiplexer/demultiplexer with 900mOhm on-state resistance in a 6-TSSOP (SC-88) surface mount package. The part is classified as obsolete, making identification of equivalent substitutes essential for ongoing design support and procurement planning.

Substiute Parts

FSA1157P6

onsemiIn Stock: 1000FSA1157P6 Datasheet

Current PartRFQ

FSA1157P6X

onsemiIn Stock: 8140FSA1157P6X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSA1157P6 is determined by strict equivalence across the following critical parameters:

• Switch circuit topology: SPST - NC configuration
• Circuit count and multiplexer ratio: 1 circuit, 1:1 configuration
• Electrical performance: 900mOhm on-state resistance, 20ns/30ns switching time, 300MHz bandwidth
• Supply voltage compatibility: 1.65V ~ 5.5V single supply operation
• Package form factor: 6-TSSOP (SC-88, SOT-363) surface mount
• Thermal operating range: -40°C ~ 85°C

The FSA1157P6X meets all these criteria as a parametric equivalent, maintaining identical electrical specifications and package compatibility while offering improved availability and compliance status.

Parameter Comparison

Engineering Selection Recommendations

The FSA1157P6X is a direct parametric equivalent to the FSA1157P6. Both parts are classified as obsolete products from onsemi, indicating end-of-life status. The FSA1157P6X offers superior availability (8126 pcs in stock versus 893 pcs) and carries RoHS3 compliance certification, whereas the original part lists REACH Unaffected status. Both components share identical electrical specifications, package form factors, and thermal operating ranges.

For new designs or production continuity, the FSA1157P6X is the appropriate selection due to enhanced stock levels and regulatory compliance documentation. Existing designs using FSA1157P6 can transition to FSA1157P6X without circuit modification, as all functional and mechanical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can FSA1157P6X replace FSA1157P6 in existing designs?

A: Yes. The FSA1157P6X is a parametric equivalent with identical electrical specifications, switching characteristics, and package dimensions. No circuit redesign is required.

Q: What is the difference between FSA1157P6 and FSA1157P6X?

A: Both parts are functionally identical. The primary differences are packaging format (FSA1157P6X is supplied in Cut Tape and Digi-Reel formats) and compliance documentation (FSA1157P6X carries RoHS3 certification). Electrical performance and package form factor are unchanged.

Q: Are both parts still in production?

A: No. Both FSA1157P6 and FSA1157P6X are classified as obsolete. FSA1157P6X maintains higher inventory availability, making it the preferred choice for procurement.

Q: What does SPST-NC configuration mean?

A: SPST-NC (Single Pole Single Throw - Normally Closed) indicates the switch has one circuit that is closed in its default state and opens when activated. This topology is suitable for signal routing and multiplexing applications.

Q: Is the SC-88 package compatible with standard PCB assembly equipment?

A: Yes. The SC-88 (6-TSSOP, SOT-363) is a standard surface mount package compatible with conventional pick-and-place and reflow soldering processes. Moisture sensitivity level 1 indicates unlimited shelf life under standard storage conditions.

Q: What supply voltage range does this switch support?

A: The FSA1157P6 and FSA1157P6X operate with single supply voltage from 1.65V to 5.5V, making them suitable for both low-voltage digital logic and higher-voltage analog signal switching applications.