FSAV430QSC Equivalent & Substitute Parts

Part Overview

The FSAV430QSC is a quad 2:1 video switch IC manufactured by onsemi in a 16-QSOP package. This component functions as a bi-directional video multiplexer/demultiplexer with RGB capability, designed for video signal routing applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. Substitute parts must maintain functional compatibility across switching architecture, channel configuration, and electrical performance within specified operating parameters.

Key Parameters

Parameter	FSAV430QSC
Manufacturer	onsemi
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Channels	4
On-State Resistance (Max)	6Ω
Supply Voltage (Single)	3V ~ 3.6V
-3dB Bandwidth	1.1GHz
Operating Temperature	-40°C ~ 85°C
Package Type	16-LSSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following mandatory parameters:

Switch circuit architecture: SPDT (Single Pole Double Throw)
Channel configuration: 4-channel 2:1 multiplexer/demultiplexer
Supply voltage compatibility: Parts must operate within or encompass the 3V ~ 3.6V range
Operating temperature range: -40°C ~ 85°C
Package form factor: 16-pin surface mount packages (QSOP, SSOP, or TSSOP variants)
On-state resistance: Maximum 10Ω acceptable for video switching applications

Substitute parts are grouped into two categories based on supply voltage requirements and bandwidth performance:

Category A (Voltage-Compatible, Lower Bandwidth): PI5A100QE and PI5A100QEX operate across 2V ~ 6V, encompassing the FSAV430QSC supply range. These parts feature 230MHz bandwidth, suitable for standard-definition video applications.

Category B (Voltage-Compatible, Higher Bandwidth): TS3A5018DBQR, TS3A5018PW, and TS3A5018PWR operate across 1.65V ~ 3.6V, overlapping the FSAV430QSC supply window. These parts deliver 300MHz bandwidth with improved switching performance.

Category C (Specialized Application): TS3L110PW and TS3L110PWR are designed for networking applications with 500MHz bandwidth and 8Ω on-state resistance, suitable for 10/100 Base-T Ethernet switching where the 3V ~ 3.6V supply requirement matches the original part.

Parameter Comparison

Part Number	Manufacturer	Switch Circuit	Channels	On-State Resistance (Max)	Supply Voltage (Single)	-3dB Bandwidth	Package	Product Status
FSAV430QSC	onsemi	SPDT	4	6Ω	3V ~ 3.6V	1.1GHz	16-LSSOP	Obsolete
PI5A100QE	Diodes Incorporated	SPDT	4	10Ω	2V ~ 6V	230MHz	16-SSOP	Active
PI5A100QEX	Diodes Incorporated	SPDT	4	10Ω	2V ~ 6V	230MHz	16-SSOP	Active
TS3A5018DBQR	Texas Instruments	SPDT	4	10Ω	1.65V ~ 3.6V	300MHz	16-SSOP	Active
TS3A5018PW	Texas Instruments	SPDT	4	10Ω	1.65V ~ 3.6V	300MHz	16-TSSOP	Last Time Buy
TS3A5018PWR	Texas Instruments	SPDT	4	10Ω	1.65V ~ 3.6V	300MHz	16-TSSOP	Active
TS3L110PW	Texas Instruments	SPDT	4	8Ω	3V ~ 3.6V	500MHz	16-TSSOP	Last Time Buy
TS3L110PWR	Texas Instruments	SPDT	4	8Ω	3V ~ 3.6V	500MHz	16-TSSOP	Active

Engineering Selection Recommendations

Primary Recommendation: TS3A5018PWR (Texas Instruments) is the preferred substitute. This part maintains active product status, operates within the FSAV430QSC supply voltage window (1.65V ~ 3.6V encompasses 3V ~ 3.6V), and delivers 300MHz bandwidth suitable for video applications. The 16-TSSOP package requires PCB layout adjustment from the original 16-LSSOP, but pinout compatibility is maintained for SPDT 2:1 switching architecture. RoHS3 compliance and unlimited moisture sensitivity level (MSL 1) support modern manufacturing standards.

Secondary Recommendation: PI5A100QEX (Diodes Incorporated) offers the broadest supply voltage range (2V ~ 6V) and maintains active product status with high inventory availability. The 230MHz bandwidth is suitable for standard video applications. The 16-SSOP package requires layout modification. RoHS3 compliance is confirmed.

Alternative for Networking Applications: TS3L110PWR (Texas Instruments) is suitable when the application requires Ethernet switching capability (10/100 Base-T). Supply voltage matches the original part exactly (3V ~ 3.6V), and 500MHz bandwidth exceeds video switching requirements. Active product status and RoHS3 compliance are confirmed.

Avoid: TS3A5018PW and TS3L110PW carry Last Time Buy status, indicating limited future availability and production discontinuation.

Frequently Asked Questions (FAQ)

Q: Can PI5A100QE and PI5A100QEX be used interchangeably with FSAV430QSC?

A: Both parts are functionally equivalent for video switching applications. They maintain the same SPDT 2:1 4-channel architecture and operate within the FSAV430QSC supply voltage range. PI5A100QEX is available in Tape & Reel packaging, while PI5A100QE is supplied in Tube packaging. The 230MHz bandwidth is suitable for standard video signals. Package footprint differs (16-SSOP vs. 16-LSSOP), requiring PCB layout modification.

Q: What is the impact of on-state resistance differences between FSAV430QSC (6Ω) and substitute parts (8Ω to 10Ω)?

A: The FSAV430QSC specifies 6Ω maximum on-state resistance. Substitute parts specify 8Ω to 10Ω. For video signal routing, this difference has minimal impact on signal integrity in typical applications. The higher resistance may introduce negligible attenuation in high-impedance video circuits. For critical impedance-matched applications, circuit simulation is recommended to confirm performance.

Q: Are package changes from 16-LSSOP to 16-SSOP or 16-TSSOP acceptable?

A: Package changes require PCB layout modification. The 16-LSSOP (0.154" width) differs from 16-SSOP (0.154" width) and 16-TSSOP (0.173" width). While pin pitch remains consistent at 0.65mm, the package body width and height differ. Footprint redesign is necessary. All three package types are surface-mount compatible and maintain the same pinout for SPDT switching functionality.

Q: Which substitute part has the best long-term availability?

A: TS3A5018PWR and TS3L110PWR both carry active product status from Texas Instruments, indicating ongoing production and long-term availability. PI5A100QEX also maintains active status from Diodes Incorporated. Parts marked Last Time Buy (TS3A5018PW, TS3L110PW) should be avoided for new designs due to limited production windows.

Q: Is the bandwidth difference between FSAV430QSC (1.1GHz) and substitute parts (230MHz to 500MHz) significant?

A: The FSAV430QSC specifies 1.1GHz bandwidth, while substitute parts range from 230MHz to 500MHz. For standard video applications (composite, S-video, component video), 230MHz bandwidth is sufficient. For high-definition video or future-proofing, TS3A5018PWR (300MHz) or TS3L110PWR (500MHz) provide improved performance margins. Application-specific signal frequency analysis determines whether the bandwidth difference impacts performance.

Q: Do all substitute parts meet RoHS and REACH compliance?

A: All substitute parts listed carry RoHS3 compliance and REACH Unaffected status, matching the FSAV430QSC compliance profile. This ensures compatibility with modern manufacturing and environmental regulations.

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