FSAV331QSCX Equivalent & Substitute Parts

Part Overview

The FSAV331QSCX is a dual 4:1 video switch IC manufactured by onsemi, designed for video multiplexing applications. This component features two independent 4:1 multiplexer channels in a 16-QSOP surface mount package. The product is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

FSAV331QSCX

onsemiIn Stock: 737FSAV331QSCX Datasheet

Current PartRFQ

PI5V331QE

Diodes IncorporatedIn Stock: 2403PI5V331QE Datasheet

SimilarRFQ

PI5V331QEX

Diodes IncorporatedIn Stock: 22981PI5V331QEX Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FSAV331QSCX is determined by strict equivalence across the following critical parameters:

• Multiplexer configuration: 4:1 dual channel architecture
• Number of channels: 2 independent channels
• On-state resistance: Maximum 10Ω
• Operating temperature range: -40°C to 85°C
• Mounting type: Surface mount
• Package footprint: 16-pin SSOP/QSOP with 0.154" (3.90mm) width
• Supply voltage compatibility: 5V nominal operation

The substitute parts PI5V331QE and PI5V331QEX, both manufactured by Diodes Incorporated, meet these core functional and mechanical requirements. Both parts maintain the dual 4:1 multiplexer topology, identical channel count, matching on-state resistance specification, and compatible package dimensions. The primary distinction between substitutes relates to product status and packaging format (tube versus tape & reel).

Parameter Comparison

Engineering Selection Recommendations

Both PI5V331QE and PI5V331QEX provide functional equivalence to the obsolete FSAV331QSCX across all critical electrical and mechanical parameters. Selection between the two Diodes Incorporated alternatives should be based on procurement requirements:

PI5V331QE is supplied in tube packaging and carries Last Time Buy status, indicating limited future availability.

PI5V331QEX is supplied in tape & reel format with significantly higher inventory (22,900 units) and also carries Last Time Buy status. This variant is recommended for volume production requirements and long-term stock planning.

Both substitute parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards. The -3dB bandwidth specification of 150MHz (minimum) for the Diodes Incorporated parts is lower than the 300MHz specification of the original FSAV331QSCX; applications requiring the full 300MHz bandwidth must be evaluated for compatibility with the reduced bandwidth of substitute parts.

Frequently Asked Questions (FAQ)

Q: Can PI5V331QE and PI5V331QEX be used interchangeably with FSAV331QSCX?

A: Yes, both parts are functionally equivalent. The primary difference is packaging format: PI5V331QE uses tube packaging while PI5V331QEX uses tape & reel. Electrical performance and pin configuration are identical.

Q: What is the impact of the reduced -3dB bandwidth (150MHz vs. 300MHz)?

A: The substitute parts operate at 150MHz minimum bandwidth compared to the original 300MHz specification. Applications utilizing video signals or switching frequencies below 150MHz are unaffected. Designs requiring operation above 150MHz must be re-evaluated for compatibility.

Q: Are the package dimensions identical between FSAV331QSCX and the substitute parts?

A: The packages are mechanically compatible. FSAV331QSCX uses 16-LSSOP while substitutes use 16-SSOP, both with identical 0.154" (3.90mm) width and pin pitch. PCB footprints are compatible.

Q: What is the difference between Last Time Buy and Obsolete status?

A: Obsolete status (FSAV331QSCX) indicates the part is no longer manufactured or supported. Last Time Buy status (PI5V331QE and PI5V331QEX) indicates limited production windows remain before discontinuation. Both statuses necessitate design migration planning.

Q: Are there compliance differences between the original and substitute parts?

A: Both substitute parts are ROHS3 compliant and REACH unaffected. The original FSAV331QSCX compliance status is not specified in available documentation. Current designs should utilize the ROHS3-compliant substitutes.