FSAV331MTCX Equivalent & Substitute Parts

Part Overview

The FSAV331MTCX is a dual 4:1 video switch IC manufactured by onsemi in a 16-TSSOP surface mount package. This component functions as a video multiplexer/demultiplexer for applications requiring signal routing in video systems. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching electrical specifications and package compatibility within acceptable mechanical tolerances.

Key Parameters

Parameter	Value
Multiplexer/Demultiplexer Circuit	4:1
Number of Channels	2
On-State Resistance (Max)	10 Ohm
Voltage - Supply, Single (V+)	4.75V ~ 5.25V
-3dB Bandwidth	300 MHz
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the FSAV331MTCX are qualified based on the following critical parameters:

Multiplexer Configuration: 4:1 circuit topology with 2 channels
On-State Resistance: Maximum 10 Ohm specification
Supply Voltage Compatibility: 5V nominal operation (FSAV331MTCX operates 4.75V ~ 5.25V; substitutes operate at 5V nominal)
Operating Temperature Range: -40°C ~ 85°C
Mounting Type: Surface mount technology
Package Compatibility: 16-pin SSOP/QSOP packages with equivalent pin pitch and mechanical footprint
Regulatory Compliance: ROHS3 compliant, REACH unaffected

The PI5V331QE and PI5V331QEX from Diodes Incorporated meet these substitution criteria. Both parts maintain the 4:1 multiplexer configuration, 2-channel architecture, and 10 Ohm on-state resistance specification. Package differences (16-QSOP vs. 16-TSSOP) represent acceptable mechanical variations within standard SSOP family tolerances for PCB layout purposes.

Parameter Comparison

Parameter	FSAV331MTCX (onsemi)	PI5V331QE (Diodes)	PI5V331QEX (Diodes)
Multiplexer/Demultiplexer Circuit	4:1	4:1	4:1
Number of Channels	2	2	2
On-State Resistance (Max)	10 Ohm	10 Ohm	10 Ohm
Voltage - Supply, Single (V+)	4.75V ~ 5.25V	5V	5V
-3dB Bandwidth	300 MHz	150 MHz (Min)	150 MHz (Min)
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	16-TSSOP (0.173", 4.40mm Width)	16-SSOP (0.154", 3.90mm Width)	16-SSOP (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both PI5V331QE and PI5V331QEX qualify as functional equivalents to the FSAV331MTCX based on matching core electrical specifications and regulatory compliance. Selection between these substitutes depends on packaging and inventory requirements:

PI5V331QE is supplied in Tube packaging with Last Time Buy product status and 2,361 units in stock.

PI5V331QEX is supplied in Tape & Reel (TR) packaging with Last Time Buy product status and 22,900 units in stock, providing higher availability for volume production requirements.

Both parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original FSAV331MTCX. The -3dB bandwidth specification of 150 MHz (Min) for the Diodes substitutes is lower than the 300 MHz specification of the onsemi part; this difference must be evaluated against specific application bandwidth requirements.

Frequently Asked Questions (FAQ)

Q: Can PI5V331QE and PI5V331QEX be used interchangeably with FSAV331MTCX?

A: Both Diodes Incorporated parts meet the core electrical substitution criteria: 4:1 multiplexer configuration, 2 channels, 10 Ohm on-state resistance, 5V supply operation, and -40°C to 85°C operating temperature range. Package differences (16-QSOP vs. 16-TSSOP) require PCB layout verification but do not affect electrical functionality.

Q: What is the significance of the bandwidth difference between FSAV331MTCX (300 MHz) and the substitute parts (150 MHz)?

A: The FSAV331MTCX specifies 300 MHz -3dB bandwidth, while PI5V331QE and PI5V331QEX specify 150 MHz minimum. Applications requiring bandwidth above 150 MHz must be evaluated for compatibility with the lower specification of the substitute parts.

Q: Are there packaging considerations when switching from FSAV331MTCX to PI5V331QE or PI5V331QEX?

A: The FSAV331MTCX uses 16-TSSOP (0.173" width), while both substitute parts use 16-SSOP (0.154" width). The 0.019" width difference requires PCB footprint adjustment. Pin pitch and lead spacing remain compatible within standard SSOP family specifications.

Q: Do the substitute parts maintain the same regulatory compliance as FSAV331MTCX?

A: Yes. Both PI5V331QE and PI5V331QEX are ROHS3 compliant and REACH unaffected, matching the regulatory status of the original part.

Q: What is the difference between PI5V331QE (Tube) and PI5V331QEX (Tape & Reel)?

A: Both parts are electrically identical. The difference is packaging format: PI5V331QE is supplied in Tube packaging, while PI5V331QEX is supplied in Tape & Reel (TR) format. PI5V331QEX offers significantly higher inventory availability (22,900 units vs. 2,361 units).

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