FSUSB22MTCX USB Switch IC Equivalent & Substitute Parts

Part Overview

The FSUSB22MTCX is a quad 2:1 USB switch IC manufactured by onsemi, designed for USB signal routing applications. This Surface Mount device in 16-TSSOP packaging operates across 3V to 3.6V supply voltage with 6.5Ω maximum on-state resistance and 750MHz bandwidth. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component sourcing.

Key Parameters

Parameter	Value
Manufacturer Part Number	FSUSB22MTCX
Manufacturer	onsemi
Category	Interface
Packaging	Cut Tape (CT)
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
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the FSUSB22MTCX is determined by the following critical parameters:

Multiplexer/Demultiplexer Circuit: 2:1 configuration
Switch Circuit: SPDT topology
Number of Channels: 4 channels
Package / Case: 16-TSSOP form factor (0.173", 4.40mm Width)
Voltage - Supply, Single (V+): 3V ~ 3.6V compatibility
On-State Resistance (Max): Must not exceed application requirements
-3dB Bandwidth: Must support USB 2.0 signal integrity (minimum 750MHz for USB applications)
Operating Temperature: -40°C ~ 85°C range
RoHS Status: ROHS3 Compliant
Mounting Type: Surface Mount

Substitute parts are grouped by their ability to meet these core electrical and mechanical specifications. Parts with identical package geometry and electrical ratings are direct substitutes. Parts with higher bandwidth or lower on-state resistance provide enhanced performance margins.

Parameter Comparison

Parameter	FSUSB22MTCX	TS3L100PW	TS3L100PWR	TS3L110PW	TS3L110PWR	TS3V330PW	TS3V330PWR	TS3V340DBQR
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Multiplexer/Demultiplexer Circuit	2:1	2:1	2:1	2:1	2:1	2:1	2:1	2:1
Switch Circuit	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT	SPDT
Number of Channels	4	4	4	4	4	4	4	4
On-State Resistance (Max)	6.5Ω	15Ω	15Ω	8Ω	8Ω	10Ω	10Ω	6Ω
Voltage - Supply, Single (V+)	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
-3dB Bandwidth	750MHz	350MHz	350MHz	500MHz	500MHz	300MHz	300MHz	500MHz
Package / Case	16-TSSOP (0.173", 4.40mm)	16-TSSOP (0.173", 4.40mm)	16-TSSOP (0.173", 4.40mm)	16-TSSOP (0.173", 4.40mm)	16-TSSOP (0.173", 4.40mm)	16-TSSOP (0.173", 4.40mm)	16-TSSOP (0.173", 4.40mm)	16-SSOP (0.154", 3.90mm)
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Last Time Buy	Active	Last Time Buy	Active	Active

Engineering Selection Recommendations

Direct Package-Compatible Substitutes (16-TSSOP)

TS3L110PWR and TS3L110PW are the primary substitutes for FSUSB22MTCX. Both maintain the 16-TSSOP package geometry, operate across the required 3V to 3.6V supply range, and support the full -40°C to 85°C operating temperature. TS3L110PWR is Active status with 25,100 units in stock, while TS3L110PW is Last Time Buy status. The 8Ω on-state resistance and 500MHz bandwidth are suitable for general switching applications, though bandwidth is lower than the original 750MHz specification.

TS3V330PWR provides enhanced performance with Active product status and 22,628 units available. The 10Ω on-state resistance and 300MHz bandwidth are acceptable for video switching applications but represent reduced bandwidth compared to FSUSB22MTCX.

TS3V340DBQR offers the lowest on-state resistance at 6Ω and 500MHz bandwidth, matching the original performance envelope. However, this part uses 16-SSOP packaging (0.154", 3.90mm width) rather than 16-TSSOP, requiring PCB layout modification.

Secondary Substitutes (Reduced Performance)

TS3L100PWR and TS3L100PW operate at 3V to 3.6V with 4-channel SPDT configuration but feature 15Ω on-state resistance and only 350MHz bandwidth. These are suitable only for applications with relaxed bandwidth requirements and are not recommended for USB 2.0 signal integrity.

Compliance and Availability

All substitute parts are ROHS3 Compliant and REACH Unaffected. TS3L110PWR (Active, 25,100 units) and TS3V330PWR (Active, 22,628 units) offer the best long-term availability and supply security.

Frequently Asked Questions (FAQ)

Q: Can TS3L100PW replace FSUSB22MTCX directly?

A: TS3L100PW shares the 16-TSSOP package and 3V to 3.6V supply voltage. However, the 350MHz bandwidth is insufficient for USB 2.0 applications requiring 750MHz performance. The 15Ω on-state resistance is also higher than the original 6.5Ω specification. This part is suitable only for low-speed switching applications.

Q: What is the difference between TS3L110PW and TS3L110PWR?

A: Both parts are identical electrically and mechanically. TS3L110PW is packaged in Tube format with Last Time Buy status. TS3L110PWR is packaged in Cut Tape & Digi-Reel format with Active product status and significantly higher inventory (25,100 units). For new designs, TS3L110PWR is recommended due to active production and supply availability.

Q: Can TS3V340DBQR be used as a substitute despite different packaging?

A: TS3V340DBQR provides superior electrical performance with 6Ω on-state resistance and 500MHz bandwidth. However, it uses 16-SSOP packaging (0.154", 3.90mm width) instead of 16-TSSOP (0.173", 4.40mm width). PCB layout modification is required. This substitution is viable only if board redesign is acceptable.

Q: Why do some substitutes have lower bandwidth than FSUSB22MTCX?

A: TS3L100 series parts (350MHz) and TS3V330 series parts (300MHz) are designed for networking and video applications respectively, not USB switching. While they share the same 2:1 SPDT 4-channel topology and package compatibility, their reduced bandwidth reflects different application requirements. For USB 2.0 signal integrity, TS3L110 series (500MHz) or TS3V340 (500MHz) are more appropriate.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant and REACH Unaffected, matching the environmental compliance of FSUSB22MTCX.

Q: What is the operating temperature range difference between substitutes?

A: FSUSB22MTCX and most substitutes operate across -40°C to 85°C. TS3L100PW and TS3L100PWR are limited to 0°C to 70°C, restricting their use in extended temperature applications. For designs requiring full -40°C to 85°C operation, TS3L110 and TS3V330/TS3V340 series are required.

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