FSAV330QSCX Equivalent & Substitute Parts

Part Overview

The FSAV330QSCX is a quad 2:1 video switch IC manufactured by onsemi in a 16-QSOP package. This interface component is designed for video multiplexing and demultiplexing applications with 4 independent channels and SPDT switching architecture. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	FSAV330QSCX
Manufacturer	onsemi
Category	Interface
Package / Case	16-LSSOP (0.154", 3.90mm Width)
Multiplexer/Demultiplexer Circuit	2:1
Number of Channels	4
On-State Resistance (Max)	10 Ohm
Voltage - Supply, Single (V+)	4V ~ 5.5V
-3dB Bandwidth	300 MHz
Operating Temperature	-40°C ~ 85°C (TA)
Switch Circuit	SPDT
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the FSAV330QSCX is determined by the following critical parameters:

Multiplexer/Demultiplexer Circuit: 2:1 configuration
Number of Channels: 4 independent channels
On-State Resistance: Maximum 10 Ohm
Voltage Supply Range: 4V ~ 5.5V (single supply)
Operating Temperature Range: -40°C ~ 85°C
Package Compatibility: 16-pin surface mount packages (QSOP, SSOP, TSSOP variants acceptable)
Application: Video switching

Substitute parts are grouped into two categories based on supply voltage compatibility:

Category A - 5V Supply Parts (Direct Voltage Match): PI5V330AQEX, PI5V330QE, PI5V330QEX (Diodes Incorporated) — These parts operate at 5V single supply, matching the upper range of the FSAV330QSCX supply specification.

Category B - 3V Supply Parts (Lower Voltage Operation): TS3V330DBQR, TS3V340DBQR, TS3V340PW, TS3V340PWR (Texas Instruments) — These parts operate at 3V ~ 3.6V and are suitable for applications requiring lower supply voltage operation.

Category C - 4V ~ 5.5V Supply Parts (Full Range Match): TS5V330CDBQR, TS5V330CPWR, TS5V330DBQR (Texas Instruments) — These parts operate across the 4V ~ 5.5V range, providing the closest electrical match to the FSAV330QSCX.

Parameter Comparison

Part Number	Manufacturer	Multiplexer Circuit	Channels	On-State Resistance (Max)	Supply Voltage	-3dB Bandwidth	Operating Temp	Package	Product Status
FSAV330QSCX	onsemi	2:1	4	10 Ohm	4V ~ 5.5V	300 MHz	-40°C ~ 85°C	16-LSSOP	Obsolete
PI5V330AQEX	Diodes Incorporated	2:1	4	10 Ohm	5V	400 MHz	-40°C ~ 85°C	16-SSOP	Last Time Buy
PI5V330QE	Diodes Incorporated	2:1	4	10 Ohm	5V	400 MHz	-40°C ~ 85°C	16-SSOP	Last Time Buy
PI5V330QEX	Diodes Incorporated	2:1	4	10 Ohm	5V	400 MHz	-40°C ~ 85°C	16-SSOP	Last Time Buy
TS3V330DBQR	Texas Instruments	2:1	4	10 Ohm	3V ~ 3.6V	300 MHz	-40°C ~ 85°C	16-SSOP	Active
TS3V340DBQR	Texas Instruments	2:1	4	6 Ohm	3V ~ 3.6V	500 MHz	-40°C ~ 85°C	16-SSOP	Active
TS3V340PW	Texas Instruments	2:1	4	6 Ohm	3V ~ 3.6V	500 MHz	-40°C ~ 85°C	16-TSSOP	Active
TS3V340PWR	Texas Instruments	2:1	4	6 Ohm	3V ~ 3.6V	500 MHz	-40°C ~ 85°C	16-TSSOP	Active
TS5V330CDBQR	Texas Instruments	2:1	4	10 Ohm	4V ~ 5.5V	250 MHz	-40°C ~ 85°C	16-SSOP	Active
TS5V330CPWR	Texas Instruments	2:1	4	10 Ohm	4V ~ 5.5V	250 MHz	-40°C ~ 85°C	16-TSSOP	Active
TS5V330DBQR	Texas Instruments	2:1	4	10 Ohm	4V ~ 5.5V	300 MHz	-40°C ~ 85°C	16-SSOP	Last Time Buy

Engineering Selection Recommendations

Primary Recommendation: TS5V330DBQR

The TS5V330DBQR from Texas Instruments is the closest functional equivalent to the FSAV330QSCX. It matches the 4V ~ 5.5V supply voltage range, maintains 10 Ohm on-state resistance, and provides 300 MHz bandwidth identical to the original part. The part is in active production status with ROHS3 compliance and REACH unaffected certification. The 16-SSOP package is mechanically compatible with the original 16-LSSOP footprint for most PCB layouts.

Secondary Recommendation: TS5V330CDBQR

The TS5V330CDBQR provides identical electrical specifications to TS5V330DBQR with active product status. The 250 MHz bandwidth is slightly reduced but remains suitable for standard video switching applications. This part offers the same supply voltage range and on-state resistance.

Alternative for 5V-Only Applications: PI5V330QEX

For designs operating exclusively at 5V, the PI5V330QEX from Diodes Incorporated offers superior bandwidth performance at 400 MHz while maintaining 10 Ohm on-state resistance. This part is in Last Time Buy status with ROHS3 compliance. The 16-SSOP package requires PCB layout verification for compatibility.

Lower Voltage Alternative: TS3V340PWR

For applications requiring 3V ~ 3.6V operation, the TS3V340PWR provides enhanced performance with 6 Ohm on-state resistance and 500 MHz bandwidth. This part is in active production with ROHS3 compliance. The 16-TSSOP package has a larger footprint (0.173" width) compared to the original 16-LSSOP (0.154" width) and requires PCB layout modification.

Frequently Asked Questions (FAQ)

Q: Can I use a 3V-rated part as a substitute for the FSAV330QSCX in a 5V system?

A: No. The TS3V330DBQR and TS3V340 series are rated for 3V ~ 3.6V operation. Using these parts in a 4V ~ 5.5V system exceeds their maximum supply voltage rating and will result in device failure or unpredictable behavior.

Q: What is the difference between the 16-QSOP, 16-SSOP, and 16-TSSOP packages?

A: These are all 16-pin surface mount packages with different body widths. The 16-QSOP and 16-SSOP are 0.154" wide (3.90mm), while the 16-TSSOP is 0.173" wide (4.40mm). Pin pitch and lead configuration differ between packages. PCB footprint verification is required before substitution.

Q: Is the TS5V330DBQR a direct pin-for-pin replacement?

A: The TS5V330DBQR maintains the same 2:1 multiplexer configuration, 4-channel architecture, and SPDT switching circuit as the FSAV330QSCX. Both use 16-pin surface mount packages with compatible pin assignments for video switching applications. However, package body dimensions differ slightly (SSOP vs. LSSOP), requiring PCB layout verification.

Q: Why do some substitutes have lower bandwidth than the original part?

A: The TS5V330CDBQR operates at 250 MHz bandwidth compared to the FSAV330QSCX at 300 MHz. This reduction is acceptable for standard video applications where bandwidth requirements do not exceed 250 MHz. Applications requiring higher bandwidth should select PI5V330QEX (400 MHz) or TS3V340 series (500 MHz).

Q: What is the significance of "Last Time Buy" product status?

A: Parts marked as Last Time Buy (PI5V330AQEX, PI5V330QE, PI5V330QEX, TS5V330DBQR) are no longer in active production and have limited inventory availability. These parts should be selected only if existing stock meets long-term project requirements. Active status parts (TS3V330DBQR, TS3V340 series, TS5V330CDBQR, TS5V330CPWR) are recommended for new designs requiring ongoing availability.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements for electronic components.

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