FSAV430QSCX Video Switch IC Equivalent & Substitute Parts

Part Overview

The FSAV430QSCX is a quad 2:1 video switch IC manufactured by onsemi, housed in a 16-QSOP package. This component functions as a 4-channel SPDT multiplexer/demultiplexer for video signal routing applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for new designs or production transitions.

Key Parameters

Parameter	FSAV430QSCX
Manufacturer	onsemi
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Circuit	2:1
Number of Channels	4
On-State Resistance (Max)	6Ω
Voltage - Supply, Single (V+)	3V ~ 3.6V
-3dB Bandwidth	1.1GHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-LSSOP (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the FSAV430QSCX is determined by the following critical parameters:

Switch Configuration: SPDT topology with 2:1 multiplexer/demultiplexer circuit
Channel Count: 4 independent circuits
On-State Resistance: Maximum 6Ω to 10Ω range acceptable for video signal integrity
Supply Voltage Compatibility: Single supply operation within 1.65V to 3.6V range
Bandwidth Performance: Minimum 230MHz for video applications
Package Compatibility: Surface mount packages (QSOP, SSOP, TSSOP, WLCSP)
Compliance: ROHS3 compliant, operating temperature -40°C to 85°C minimum

Substitute parts are grouped into two categories:

Primary Substitutes (Recommended): Parts with active product status, superior electrical performance, and direct functional equivalence.

Secondary Substitutes (Compatible): Parts with acceptable electrical parameters but last-time-buy or alternative package considerations.

Parameter Comparison

Parameter	FSAV430QSCX	TMUX1575YCJR	PI5A100QEX	TS3A5018DBQR	TS3A5018PWR	TS3L110PWR
Manufacturer	onsemi	Texas Instruments	Diodes Incorporated	Texas Instruments	Texas Instruments	Texas Instruments
Switch Circuit	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Multiplexer/Demultiplexer	2:1	2:1	2:1	2:1	2:1	2:1
Number of Circuits	4	4	4	4	4	4
On-State Resistance (Max)	6Ω	8Ω	10Ω	10Ω	10Ω	8Ω
Voltage - Supply, Single (V+)	3V ~ 3.6V	1.08V ~ 3.6V	2V ~ 6V	1.65V ~ 3.6V	1.65V ~ 3.6V	3V ~ 3.6V
-3dB Bandwidth	1.1GHz	1.8GHz	230MHz	300MHz	300MHz	500MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-LSSOP	16-WLCSP	16-QSOP	16-SSOP	16-TSSOP	16-TSSOP
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TMUX1575YCJR (Texas Instruments) is the primary recommended substitute. This part maintains active product status with extended operating temperature range (-40°C to 125°C), superior bandwidth performance (1.8GHz), and improved electrical characteristics including lower on-state resistance matching (100mOhm). The 16-WLCSP package requires PCB layout redesign but offers superior performance margins for video switching applications.

TS3A5018PWR (Texas Instruments) provides the most direct functional replacement with active product status, matching supply voltage range (1.65V ~ 3.6V), and compatible 16-TSSOP package footprint. This part is available in high volume (109,400 units) and maintains ROHS3 compliance with MSL 1 rating.

PI5A100QEX (Diodes Incorporated) offers an alternative with active status and high inventory availability (17,142 units). The 16-QSOP package matches the original FSAV430QSCX footprint, simplifying PCB migration. Supply voltage range extends to 6V, providing broader application flexibility.

TS3L110PWR (Texas Instruments) is suitable for networking-specific video applications requiring 10/100 Base-T compatibility. Active product status and 500MHz bandwidth support modern video switching requirements.

Frequently Asked Questions (FAQ)

Q: Can TMUX1575YCJR directly replace FSAV430QSCX without PCB modification?

A: No. TMUX1575YCJR uses 16-WLCSP (1.34x1.34mm BGA) packaging versus FSAV430QSCX 16-LSSOP. PCB layout redesign is required. TS3A5018PWR or PI5A100QEX offer package compatibility closer to the original.

Q: What is the minimum on-state resistance acceptable for video signal integrity?

A: The FSAV430QSCX specifies 6Ω maximum. Substitutes with 8Ω to 10Ω on-state resistance remain within acceptable video switching parameters for standard applications. TMUX1575YCJR (8Ω) and TS3L110PWR (8Ω) provide optimal performance.

Q: Are all listed substitutes compatible with 3.3V supply operation?

A: Yes. All substitutes support 3.3V operation within their specified supply voltage ranges. TMUX1575YCJR extends compatibility to 1.08V minimum, while PI5A100QEX extends to 6V maximum.

Q: Which substitute offers the best bandwidth performance for high-frequency video applications?

A: TMUX1575YCJR provides 1.8GHz -3dB bandwidth, exceeding the original 1.1GHz specification. TS3L110PWR offers 500MHz, suitable for standard video and networking applications.

Q: What packaging considerations apply when selecting a substitute?

A: FSAV430QSCX uses 16-LSSOP (0.154" width). PI5A100QEX maintains 16-QSOP compatibility. TS3A5018PWR and TS3L110PWR use 16-TSSOP (0.173" width), requiring minor PCB footprint adjustment. TMUX1575YCJR uses 16-WLCSP, requiring complete layout redesign.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH unaffected status, matching the original FSAV430QSCX certification requirements.

Q: Which substitute has the highest inventory availability?

A: TS3A5018PWR offers 109,400 units in stock, providing supply chain security for production volumes.

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