FSAV450QSC Equivalent & Substitute Parts

Part Overview

The FSAV450QSC is a quad 2:1 video switch IC manufactured by onsemi in a 16-QSOP surface mount package. This component functions as a 4-channel SPDT multiplexer/demultiplexer circuit designed for video signal routing applications, featuring RGB capability and an 800MHz bandwidth. The part is classified as obsolete, making equivalent substitute components necessary for new designs and ongoing production support.

Substiute Parts

FSAV450QSC

onsemiIn Stock: 1039FSAV450QSC 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 FSAV450QSC is determined by the following core electrical and mechanical parameters:

• Switch Configuration: SPDT topology with 2:1 multiplexer/demultiplexer circuit
• Channel Count: 4 independent circuits
• On-State Resistance: Maximum 10Ω (substitute parts allow up to 10Ω versus the original 7Ω specification)
• Supply Voltage Compatibility: Substitute parts operate at 1.65V ~ 6V, which encompasses the original 4.5V ~ 5.5V range
• Operating Temperature Range: -40°C ~ 85°C (TA) maintained across all substitutes
• Package Form Factor: 16-pin surface mount packages (QSOP, SSOP, TSSOP variants with 0.154" to 0.173" width)
• Mounting Type: Surface mount technology

The substitute parts PI5A100QE, PI5A100QEX, TS3A5018DBQR, TS3A5018PW, and TS3A5018PWR meet these core substitution criteria. Differences in bandwidth, leakage current, and charge injection represent performance enhancements or variations that do not prevent functional substitution in video switching applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TS3A5018PWR

TS3A5018PWR is the preferred substitute for FSAV450QSC. This Texas Instruments part maintains active product status with high inventory availability (109,400 pcs), ensuring long-term supply continuity. It meets all core substitution parameters: 4-channel SPDT 2:1 multiplexer configuration, 10Ω on-state resistance, -40°C to 85°C operating range, and surface mount packaging. The part is ROHS3 compliant and REACH unaffected, satisfying modern regulatory requirements. The 16-TSSOP package (0.173" width) represents a minor footprint increase from the original 16-LSSOP but maintains compatibility with standard PCB assembly processes.

Secondary Recommendation: PI5A100QEX

PI5A100QEX from Diodes Incorporated provides an alternative with equivalent electrical specifications and the highest inventory level (17,142 pcs). This part uses the 16-SSOP package matching the original 0.154" width, minimizing PCB layout modifications. Product status is active with ROHS3 compliance and REACH unaffected designation.

Tertiary Recommendation: TS3A5018DBQR

TS3A5018DBQR offers active product status with substantial inventory (17,400 pcs) and identical package dimensions to PI5A100QEX (16-SSOP, 0.154" width). This Texas Instruments option provides equivalent functionality with ROHS3 compliance.

Not Recommended: TS3A5018PW

TS3A5018PW carries Last Time Buy status, indicating discontinued production. While functionally equivalent, this part should be avoided for new designs due to limited future availability.

Frequently Asked Questions (FAQ)

Q: Can TS3A5018PWR directly replace FSAV450QSC without PCB modifications?

A: TS3A5018PWR uses a 16-TSSOP package (0.173" width) versus the original 16-LSSOP (0.154" width). Both are 16-pin surface mount packages with identical pin pitch. PCB footprint adjustment is required, but the pinout and electrical interface remain compatible. Consult the respective datasheets for exact pad dimensions.

Q: Why do substitute parts specify 10Ω on-state resistance when the original is 7Ω?

A: The FSAV450QSC specifies a maximum on-state resistance of 7Ω. Substitute parts with 10Ω maximum resistance remain functionally compatible for video switching applications, as the 3Ω difference does not significantly impact signal integrity in typical RGB video routing circuits. The lower resistance of the original part represents a performance advantage, not a functional requirement for substitution.

Q: Are PI5A100QE and PI5A100QEX interchangeable?

A: PI5A100QE and PI5A100QEX are electrically identical. The difference is packaging: PI5A100QE ships in Tube format while PI5A100QEX uses Tape & Reel (TR) format. Both are suitable substitutes for FSAV450QSC. Select based on procurement and assembly requirements.

Q: What is the impact of different supply voltage ranges on substitution?

A: The FSAV450QSC operates at 4.5V ~ 5.5V. Substitute parts from Diodes Incorporated (PI5A100 series) support 2V ~ 6V, while Texas Instruments parts (TS3A5018 series) support 1.65V ~ 3.6V. For applications using the original 4.5V ~ 5.5V supply, all substitutes remain compatible. Applications requiring operation outside these ranges must verify compatibility with the specific substitute part's voltage specification.

Q: Does the -3dB bandwidth difference affect video signal quality?

A: The FSAV450QSC specifies 800MHz bandwidth. Substitute parts specify 230MHz (Diodes) or 300MHz (Texas Instruments). For standard video applications (composite, component, or RGB), these bandwidth specifications are sufficient. High-frequency video standards or specialized applications should verify bandwidth requirements against the specific substitute part's datasheet.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All five substitute parts (PI5A100QE, PI5A100QEX, TS3A5018DBQR, TS3A5018PW, TS3A5018PWR) are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.