FSAL200MTC Equivalent & Substitute Parts

Part Overview

The FSAL200MTC is a 4-circuit SPDT interface switch IC manufactured by onsemi, housed in a 16-TSSOP package. This component functions as a 2:1 multiplexer/demultiplexer with 12Ohm on-state resistance, designed for signal routing applications in telecommunications and data interface systems. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

FSAL200MTC

onsemiIn Stock: 1238FSAL200MTC Datasheet

Current PartRFQ

PI5L200LEX

Diodes IncorporatedIn Stock: 1604PI5L200LEX Datasheet

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QS4A205QG

Renesas Electronics CorporationIn Stock: 2377QS4A205QG Datasheet

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QS4A205QG8

Renesas Electronics CorporationIn Stock: 16558QS4A205QG8 Datasheet

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TS3A5018PW

Texas InstrumentsIn Stock: 1250TS3A5018PW Datasheet

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TS3A5018PWR

Texas InstrumentsIn Stock: 109503TS3A5018PWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FSAL200MTC is determined by the following critical parameters:

• Circuit Configuration: SPDT switch type with 4 circuits and 2:1 multiplexer/demultiplexer function
• On-State Resistance: Maximum 12Ohm (tolerance of up to 17Ohm acceptable for applications not requiring tight matching)
• Supply Voltage Compatibility: Overlap within 3V ~ 5.5V range
• Package Compatibility: 16-TSSOP or equivalent footprint (16-QSOP acceptable with mechanical verification)
• Operating Temperature Range: -40°C ~ 85°C minimum
• Electrical Performance: -3dB bandwidth and switch timing suitable for signal routing applications

Substitute parts are grouped into two categories based on electrical performance alignment:

Category A (Direct Electrical Match): PI5L200LEX and TS3A5018PWR/TS3A5018PW maintain core electrical specifications within acceptable tolerance.

Category B (Enhanced Performance): QS4A205QG and QS4A205QG8 offer superior electrical characteristics (lower on-state resistance variation, faster switching, higher bandwidth) suitable for demanding applications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance)

PI5L200LEX (Diodes Incorporated) provides the closest electrical match to FSAL200MTC with identical 12Ohm on-state resistance and 137MHz bandwidth. This part is actively manufactured and ROHS3 compliant, making it the preferred choice for applications requiring no design modification. The 16-TSSOP package ensures pin-for-pin compatibility.

TS3A5018PWR (Texas Instruments) offers active product status with superior electrical characteristics (10Ohm on-state resistance, 300MHz bandwidth, faster switching). This part is suitable for applications where improved performance is beneficial. Note that the supply voltage range (1.65V ~ 3.6V) differs from the original specification; verify compatibility with your power supply architecture.

For Enhanced Performance Applications

QS4A205QG8 (Renesas Electronics, Tape & Reel packaging) and QS4A205QG (Renesas Electronics, Tube packaging) deliver significantly enhanced electrical performance with 830MHz bandwidth and 6ns switching time. These parts are actively manufactured and ROHS3 compliant. The 16-QSOP package requires PCB footprint verification before implementation. Higher on-state resistance (17Ohm) is acceptable only in applications where signal attenuation is not critical.

For Legacy System Support

TS3A5018PW (Texas Instruments, Last Time Buy status) remains available but with limited procurement window. Use only when TS3A5018PWR is unavailable or when specific packaging requirements mandate tube delivery.

Frequently Asked Questions (FAQ)

Q: Can I use QS4A205QG as a direct replacement for FSAL200MTC?

A: QS4A205QG maintains the same circuit configuration (SPDT, 4 circuits, 2:1 multiplexer) and operating temperature range. However, the 16-QSOP package differs from the original 16-TSSOP footprint. PCB layout verification is required. The 17Ohm on-state resistance is 5Ohm higher than the original specification; confirm that your application tolerates this increased signal attenuation.

Q: What is the difference between TS3A5018PW and TS3A5018PWR?

A: Both parts are electrically identical with 10Ohm on-state resistance and 300MHz bandwidth. TS3A5018PWR is actively manufactured with Cut Tape and Digi-Reel packaging, while TS3A5018PW is in Last Time Buy status with Tube packaging. For new designs, specify TS3A5018PWR to ensure long-term availability.

Q: Is PI5L200LEX suitable for 3V operation?

A: PI5L200LEX supports 3.3V and 5V supply voltages. The original FSAL200MTC operates from 3V ~ 5.5V. For applications requiring 3V operation, verify that 3.3V meets your system requirements, or select TS3A5018PWR which supports 1.65V ~ 3.6V range.

Q: Do all substitute parts meet RoHS compliance?

A: All active substitute parts (PI5L200LEX, QS4A205QG, QS4A205QG8, TS3A5018PWR) are ROHS3 compliant. TS3A5018PW (Last Time Buy) is also ROHS3 compliant. The original FSAL200MTC RoHS status is not specified in available documentation.

Q: Which substitute part has the fastest switching speed?

A: QS4A205QG and QS4A205QG8 offer the fastest switching with 6ns Ton and 6ns Toff. The original FSAL200MTC specifies 20ns Ton and 10ns Toff. TS3A5018PWR provides intermediate performance at 8ns Ton and 6.5ns Toff.

Q: Can I mix packaging types in the same production run?

A: QS4A205QG (Tube) and QS4A205QG8 (Tape & Reel) are electrically identical but differ in packaging format. Verify your assembly process requirements before mixing packaging types. PI5L200LEX is supplied in Tape & Reel format only.