FSUSB22MTC USB Switch IC Equivalent & Substitute Parts

Part Overview

The FSUSB22MTC is a quad-channel USB 2.0 switch IC manufactured by onsemi in 16-TSSOP surface mount packaging. This component functions as a 2:1 multiplexer/demultiplexer with SPDT switching architecture, designed for high-speed USB signal routing applications. 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	FSUSB22MTC
Manufacturer	onsemi
Category	Interface
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Multiplexer/Demultiplexer Circuit	2:1
Switch Circuit	SPDT
Number of Channels	4
On-State Resistance (Max)	6.5Ω
Voltage - Supply, Single (V+)	3V ~ 3.6V
-3dB Bandwidth	750MHz
Features	Bi-Directional, USB 2.0
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the FSUSB22MTC is determined by the following critical parameters:

Primary Matching Criteria:

Multiplexer/Demultiplexer Circuit: 2:1
Switch Circuit: SPDT
Number of Channels: 4
Voltage Supply Range: 3V ~ 3.6V
Mounting Type: Surface Mount
Package Type: 16-pin TSSOP or 16-pin SSOP

Secondary Performance Criteria:

On-State Resistance (Max): Must not exceed 6.5Ω for direct USB 2.0 applications
-3dB Bandwidth: Must support 750MHz minimum for USB 2.0 compliance
Operating Temperature Range: Must encompass -40°C ~ 85°C

Substitute parts are grouped into two categories based on application compatibility:

Category A - Direct USB 2.0 Substitutes: Parts maintaining USB 2.0 feature set, on-state resistance ≤6.5Ω, and bandwidth ≥750MHz. These provide equivalent electrical performance for USB switching applications.

Category B - Cross-Application Substitutes: Parts with compatible switching architecture and package but optimized for networking or video applications. These feature higher on-state resistance (8Ω–15Ω) and reduced bandwidth (300MHz–500MHz), suitable only for applications where USB 2.0 performance is not required.

Parameter Comparison

Part Number	Manufacturer	Package	Channels	On-State Resistance (Max)	Voltage Supply	-3dB Bandwidth	Operating Temp	Product Status	Application
FSUSB22MTC	onsemi	16-TSSOP	4	6.5Ω	3V ~ 3.6V	750MHz	-40°C ~ 85°C	Obsolete	USB
FSUSB22MTCX	Fairchild Semiconductor	16-TSSOP	4	6.5Ω	3V ~ 3.6V	750MHz	-40°C ~ 85°C	Active	USB
TS3L100DBQR	Texas Instruments	16-SSOP	4	15Ω	3V ~ 3.6V	350MHz	0°C ~ 70°C	Active	Networking
TS3L100PW	Texas Instruments	16-TSSOP	4	15Ω	3V ~ 3.6V	350MHz	0°C ~ 70°C	Active	Networking
TS3L100PWR	Texas Instruments	16-TSSOP	4	15Ω	3V ~ 3.6V	350MHz	0°C ~ 70°C	Active	Networking
TS3L110DBQR	Texas Instruments	16-SSOP	4	8Ω	3V ~ 3.6V	500MHz	-40°C ~ 85°C	Active	Networking
TS3L110PW	Texas Instruments	16-TSSOP	4	8Ω	3V ~ 3.6V	500MHz	-40°C ~ 85°C	Last Time Buy	Networking
TS3L110PWR	Texas Instruments	16-TSSOP	4	8Ω	3V ~ 3.6V	500MHz	-40°C ~ 85°C	Active	Networking
TS3V330DBQR	Texas Instruments	16-SSOP	4	10Ω	3V ~ 3.6V	300MHz	-40°C ~ 85°C	Active	Video
TS3V330PW	Texas Instruments	16-TSSOP	4	10Ω	3V ~ 3.6V	300MHz	-40°C ~ 85°C	Last Time Buy	Video
TS3V330PWR	Texas Instruments	16-TSSOP	4	10Ω	3V ~ 3.6V	300MHz	-40°C ~ 85°C	Active	Video

Engineering Selection Recommendations

For Direct USB 2.0 Replacement:

FSUSB22MTCX is the primary equivalent substitute. It maintains identical electrical specifications (6.5Ω on-state resistance, 750MHz bandwidth) and operates across the full temperature range (-40°C ~ 85°C). The part is in active production status with Fairchild Semiconductor, ensuring long-term availability. Both parts use 16-TSSOP packaging, enabling direct PCB layout compatibility.

For Extended Temperature Range Applications:

TS3L110PWR provides the closest performance match among Texas Instruments alternatives. It delivers 8Ω on-state resistance and 500MHz bandwidth while maintaining the full -40°C ~ 85°C operating range. The 16-TSSOP package matches the original footprint. This part is in active production status. However, the reduced bandwidth (500MHz vs. 750MHz) and increased on-state resistance (8Ω vs. 6.5Ω) result in measurable signal degradation for high-speed USB 2.0 applications.

For Standard Temperature Range Applications (0°C ~ 70°C):

TS3L100PWR offers active production status with 16-TSSOP packaging compatibility. The 15Ω on-state resistance and 350MHz bandwidth are suitable only for low-speed USB or non-USB switching applications. This part is not recommended for USB 2.0 designs.

For Video or Networking Applications:

TS3V330PWR (video) and TS3L110PWR (networking) provide application-specific optimization. Both maintain 16-TSSOP packaging and full temperature range operation. Selection depends on circuit application requirements rather than USB 2.0 compatibility.

Compliance and Certification:

All substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the original part's regulatory profile. Texas Instruments parts include ROHS3 compliance certification. Moisture sensitivity levels vary (MSL 1 or MSL 2); verify packaging requirements for your assembly process.

Frequently Asked Questions (FAQ)

Q: Can TS3L110PWR directly replace FSUSB22MTC in a USB 2.0 application?

A: TS3L110PWR is electrically compatible in terms of supply voltage, channel count, and package footprint. However, the 500MHz bandwidth and 8Ω on-state resistance fall below USB 2.0 specifications (750MHz, 6.5Ω). Use only if your application does not require full USB 2.0 performance compliance.

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

A: Both are 16-pin surface mount packages with identical pin counts and electrical compatibility. The TSSOP (Thin Shrink Small Outline Package) has a 0.173" width, while SSOP (Shrink Small Outline Package) has a 0.154" width. PCB footprints differ; verify your design layout before substituting between these package types.

Q: Why do some substitutes have higher on-state resistance?

A: Parts optimized for networking (TS3L100 series) or video (TS3V330 series) applications use different semiconductor processes prioritizing bandwidth and integration over low-resistance switching. The FSUSB22MTC and TS3L110PWR are optimized for low-impedance USB signal paths.

Q: Is FSUSB22MTCX the only direct substitute?

A: FSUSB22MTCX is the only substitute maintaining identical electrical specifications (6.5Ω, 750MHz) and full temperature range. It is the recommended choice for direct replacement in USB 2.0 designs.

Q: What does "Last Time Buy" product status mean?

A: Last Time Buy indicates the manufacturer has announced end-of-life. TS3L110PW and TS3V330PW are in this status. Existing inventory may be available, but no new production is planned. For long-term designs, select parts with Active status.

Q: Can I use TS3L100 series parts in place of TS3L110 series?

A: No. TS3L100 parts operate only at 0°C ~ 70°C, while TS3L110 parts support -40°C ~ 85°C. If your application requires extended temperature range, TS3L110 is mandatory.

Q: Are all substitutes RoHS compliant?

A: FSUSB22MTC compliance status is not specified in available data. Texas Instruments substitutes (TS3L100, TS3L110, TS3V330 series) are ROHS3 compliant. Verify RoHS requirements for your application before final part selection.

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