FSAV450QSCX Equivalent & Substitute Parts

Part Overview

The FSAV450QSCX is a quad 2:1 video switch IC manufactured by onsemi in a 16-QSOP package. This interface component is designed for video multiplexing applications with 4 independent SPDT switch circuits and an on-state resistance of 7Ω maximum. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

FSAV450QSCX

onsemiIn Stock: 5013FSAV450QSCX Datasheet

Current PartRFQ

PI5A100QE

Diodes IncorporatedIn Stock: 1464PI5A100QE Datasheet

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PI5A100QEX

Diodes IncorporatedIn Stock: 17215PI5A100QEX Datasheet

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TS3A5018DBQR

Texas InstrumentsIn Stock: 17447TS3A5018DBQR Datasheet

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TS3A5018PW

Texas InstrumentsIn Stock: 1250TS3A5018PW Datasheet

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TS3A5018PWR

Texas InstrumentsIn Stock: 109503TS3A5018PWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSAV450QSCX is determined by the following critical parameters:

• Switch Configuration: SPDT topology with 2:1 multiplexer/demultiplexer circuit
• Channel Count: 4 independent switch circuits
• On-State Resistance: Maximum 10Ω (substitute parts allow up to 10Ω vs. 7Ω original)
• Supply Voltage Compatibility: Substitute parts operate at 2V ~ 6V or 1.65V ~ 3.6V, both encompassing the original 4.5V ~ 5.5V range
• Package Footprint: 16-pin QSOP/SSOP/TSSOP packages with 0.154" to 0.173" width
• Operating Temperature: -40°C ~ 85°C maintained across all substitutes
• Surface Mount Technology: All substitutes use surface mount assembly

The substitute parts PI5A100QE, PI5A100QEX, TS3A5018DBQR, TS3A5018PW, and TS3A5018PWR meet these core functional requirements. Differences in bandwidth, switch time, and leakage current represent performance enhancements or trade-offs suitable for video switching applications.

Parameter Comparison

Engineering Selection Recommendations

For Active Production: TS3A5018PWR (Texas Instruments) is the preferred substitute. This part maintains active product status with the highest inventory availability (109,400 pcs), ROHS3 compliance, and unlimited moisture sensitivity level (MSL 1). The 16-TSSOP package requires PCB layout adjustment due to increased width (4.40mm vs. 3.90mm), but electrical performance is superior with 300MHz bandwidth and 100nA maximum leakage current.

For Pin-Compatible Footprint Replacement: PI5A100QEX (Diodes Incorporated) provides direct 16-SSOP package compatibility with the original 0.154" width. This part is active with substantial inventory (17,142 pcs) and ROHS3 compliance. The 230MHz bandwidth is reduced compared to the original 800MHz specification but remains suitable for standard video switching applications.

For Last-Time-Buy Scenarios: TS3A5018PW (Texas Instruments) is classified as Last Time Buy with limited inventory (1,220 pcs). This option is suitable only for legacy system support where supply continuity is not a long-term requirement.

Supply Voltage Consideration: The original FSAV450QSCX operates at 4.5V ~ 5.5V. Substitute parts from Diodes Incorporated (PI5A100 series) support 2V ~ 6V, providing direct compatibility. Texas Instruments TS3A5018 series operates at 1.65V ~ 3.6V and requires circuit-level voltage verification before selection.

Frequently Asked Questions (FAQ)

Q: Can TS3A5018PWR replace FSAV450QSCX in existing designs without PCB modification?

A: TS3A5018PWR uses a 16-TSSOP package (0.173" width) versus the original 16-LSSOP package (0.154" width). PCB footprint modification is required. Pin-compatible alternatives in 16-SSOP packages (PI5A100QE, PI5A100QEX) allow direct substitution without layout changes.

Q: What is the impact of increased on-state resistance in substitute parts?

A: Substitute parts specify 10Ω maximum on-state resistance versus 7Ω for the original. This 3Ω increase results in proportionally higher signal attenuation in video switching paths. For applications with tight signal integrity requirements, circuit-level analysis is necessary.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (PI5A100QE, PI5A100QEX, TS3A5018DBQR, TS3A5018PW, TS3A5018PWR) carry ROHS3 Compliant certification. The original FSAV450QSCX does not specify RoHS status.

Q: Which substitute offers the best bandwidth performance?

A: TS3A5018DBQR and TS3A5018PWR both provide 300MHz -3dB bandwidth. The original FSAV450QSCX specifies 800MHz. PI5A100 series parts specify 230MHz. Bandwidth selection depends on video signal frequency requirements.

Q: What is the difference between PI5A100QE and PI5A100QEX?

A: Both parts are electrically identical with 10Ω on-state resistance and 230MHz bandwidth. The difference is packaging: PI5A100QE is supplied in Tube packaging, while PI5A100QEX is supplied in Tape & Reel (TR) format. PI5A100QEX has significantly higher inventory availability (17,142 pcs vs. 1,393 pcs).

Q: Can TS3A5018 series parts operate at the original 4.5V ~ 5.5V supply voltage?

A: TS3A5018 series parts specify 1.65V ~ 3.6V supply voltage range. The original 5V supply falls outside this range. These parts are not suitable for designs requiring 4.5V ~ 5.5V operation. Use PI5A100 series (2V ~ 6V range) for direct voltage compatibility.