PI3A212ZLEX Equivalent & Substitute Parts

Part Overview

The PI3A212ZLEX is a dual SPDT audio/video switch IC manufactured by Diodes Incorporated in a 10-TQFN (1.3x1.6) package. This component features 2-channel 2:1 multiplexer/demultiplexer functionality with break-before-make switching characteristics, designed for audio and video signal routing applications. The part is currently obsolete, necessitating identification of functionally equivalent alternatives that maintain compatibility with existing designs while offering active product status and continued availability.

Key Parameters

Parameter	PI3A212ZLEX
Switch Circuit Type	SPDT
Number of Channels	2
Multiplexer/Demultiplexer Circuit	2:1
On-State Resistance (Max)	800mOhm
Voltage Supply Range (V+)	2.7V ~ 4.2V
-3dB Bandwidth	60MHz
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package	10-WFQFN (1.3x1.6)
Product Status	Obsolete
RoHS Compliance	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PI3A212ZLEX is determined by the following critical parameters:

Switch Configuration: SPDT topology with 2:1 multiplexer/demultiplexer circuit (mandatory)
Channel Count: 2 channels (mandatory)
On-State Resistance: Maximum 800mOhm or lower (critical for signal integrity in audio/video applications)
Supply Voltage Compatibility: Minimum overlap with 2.7V ~ 4.2V range
Bandwidth Performance: Minimum 60MHz -3dB bandwidth for audio/video signal fidelity
Operating Temperature Range: -40°C ~ 85°C (mandatory)
Package Compatibility: Surface mount packages with equivalent or superior thermal/electrical characteristics
Compliance Status: ROHS3 and REACH compliance maintained

Substitute parts are grouped by on-state resistance performance tier, as this parameter directly impacts signal attenuation and noise characteristics in audio/video switching applications.

Parameter Comparison

Part Number	Manufacturer	Switch Type	Channels	Ron (Max)	V+ Range	-3dB BW	Temp Range	Package	Status
PI3A212ZLEX	Diodes Inc.	SPDT	2	800mOhm	2.7V~4.2V	60MHz	-40°C~85°C	10-WFQFN	Obsolete
NX3L2267GU,115	NXP Semiconductors	SPDT	2	750mOhm	1.4V~4.3V	60MHz	-40°C~125°C	10-XFQFN	Active
NX3L2267SGU,115	NXP USA Inc.	SPDT	2	750mOhm	1.4V~4.3V	60MHz	-40°C~125°C	10-XFQFN	Obsolete
NS5A4684SMNTBG	onsemi	SPDT	2	400mOhm	1.65V~5.5V	19MHz	-40°C~85°C	10-WFQFN	Active
NLAS5223BMNR2G	onsemi	SPDT	2	350mOhm	1.65V~4.5V	19MHz	-40°C~85°C	10-WFQFN	Active
NLAS5223BLMNR2G	onsemi	SPDT	2	350mOhm	1.65V~4.5V	19MHz	-40°C~85°C	10-WFQFN	Obsolete
STG3682QTR	STMicroelectronics	SPDT	2	5.2Ohm	1.65V~4.3V	800MHz	-40°C~85°C	10-UFQFN	Active
DG2723DN-T1-E4	Vishay Siliconix	SPDT	2	8Ohm	2.7V~4.3V	700MHz	-40°C~85°C	10-UFQFN	Active
DG2750DN-T1-E4	Vishay Siliconix	SPDT	2	1Ohm	1.8V~5V	49MHz	-40°C~85°C	10-UFQFN	Active
NX5L2750CGUX	NXP USA Inc.	SPDT	2	1.3Ohm	1.8V~5V	100MHz	-40°C~85°C	10-XFQFN	Active
STG3696EQTR	STMicroelectronics	SPDT	2	5Ohm	2.7V~4.5V	850MHz	-40°C~85°C	10-UFQFN	Active

Engineering Selection Recommendations

Tier 1 - Direct Functional Equivalents (Active Status)

NX3L2267GU,115 (NXP Semiconductors) provides the closest functional match with 750mOhm on-state resistance, identical 60MHz bandwidth, and extended operating temperature range (-40°C to 125°C). This part maintains ROHS3 compliance and offers superior low-leakage performance (10nA). The 10-XFQFN package is mechanically compatible with the original 10-WFQFN footprint for audio/video applications.

NS5A4684SMNTBG (onsemi) offers lower on-state resistance (400mOhm) with extended supply voltage range (1.65V ~ 5.5V) and maintains the 10-WFQFN package format. This part is suitable for designs requiring improved signal integrity with minimal impedance contribution.

NLAS5223BMNR2G (onsemi) provides the lowest on-state resistance (350mOhm) among onsemi offerings in the 10-WFQFN package, with active product status and full compliance certifications.

Tier 2 - High-Performance Alternatives (Active Status)

STG3682QTR (STMicroelectronics) and STG3696EQTR (STMicroelectronics) deliver significantly higher bandwidth performance (800MHz and 850MHz respectively) with lower on-state resistance values. These parts are suitable for applications requiring enhanced frequency response beyond the original 60MHz specification. Both maintain -40°C to 85°C operating range and ROHS3 compliance.

DG2723DN-T1-E4 and DG2750DN-T1-E4 (Vishay Siliconix) offer ultra-low on-state resistance (8Ohm and 1Ohm respectively) with high bandwidth performance (700MHz and 49MHz). These parts are applicable to low-impedance signal routing scenarios.

NX5L2750CGUX (NXP USA Inc.) combines moderate on-state resistance (1.3Ohm) with 100MHz bandwidth and break-before-make switching, matching the original feature set with extended supply voltage compatibility (1.8V ~ 5V).

Compliance and Availability

All recommended substitute parts maintain ROHS3 compliance and REACH unaffected status. Selection should prioritize active product status parts (NX3L2267GU,115, NS5A4684SMNTBG, NLAS5223BMNR2G, STG3682QTR, DG2723DN-T1-E4, DG2750DN-T1-E4, NX5L2750CGUX, STG3696EQTR) to ensure long-term supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can NX3L2267GU,115 directly replace PI3A212ZLEX in existing designs?

A: NX3L2267GU,115 meets all critical substitution parameters: SPDT topology, 2-channel configuration, 750mOhm on-state resistance (within acceptable range), 60MHz bandwidth match, and -40°C to 85°C operating range. The 10-XFQFN package is mechanically compatible with 10-WFQFN footprints. Pin-level compatibility must be verified against specific board layout and schematic requirements.

Q: What is the significance of on-state resistance in audio/video switching?

A: On-state resistance directly impacts signal attenuation and introduces impedance in the signal path. Lower resistance values (350mOhm to 1Ohm) minimize signal loss and noise contribution, critical for high-fidelity audio and video applications. The PI3A212ZLEX specification of 800mOhm establishes the maximum acceptable threshold; substitute parts with equal or lower resistance maintain or improve signal integrity.

Q: Are there bandwidth considerations when selecting a substitute?

A: The PI3A212ZLEX specifies 60MHz -3dB bandwidth, suitable for standard audio/video signal routing. Substitute parts with equal or higher bandwidth (60MHz minimum) maintain compatibility. Parts with significantly higher bandwidth (700MHz, 800MHz, 850MHz) provide enhanced frequency response margin but do not degrade performance in lower-frequency applications.

Q: How do package differences affect substitution?

A: The original PI3A212ZLEX uses 10-WFQFN (1.3x1.6) packaging. Substitute parts employ 10-WFQFN, 10-XFQFN, or 10-UFQFN packages, all with 1.4x1.8 or 1.8x1.4 dimensions. These packages are mechanically and electrically compatible for surface mount assembly. PCB footprint verification is required to confirm pad layout compatibility.

Q: Why are some substitute parts listed as obsolete?

A: NX3L2267SGU,115 and NLAS5223BLMNR2G are obsolete but functionally equivalent. Active-status alternatives (NX3L2267GU,115, NLAS5223BMNR2G) provide identical electrical specifications with assured long-term availability. Obsolete parts should be avoided for new designs or long-term production requirements.

Q: What supply voltage range is acceptable for substitution?

A: The PI3A212ZLEX operates at 2.7V ~ 4.2V. Substitute parts must support this range or provide overlapping compatibility. Parts with extended ranges (1.65V ~ 5.5V or 1.8V ~ 5V) offer greater design flexibility while maintaining backward compatibility with the original specification.

Q: Is break-before-make switching preserved in all substitutes?

A: The PI3A212ZLEX features break-before-make switching. NX5L2750CGUX explicitly specifies this feature. Other substitute parts (NX3L2267GU,115, NS5A4684SMNTBG, NLAS5223 series, STG3682QTR, DG2723DN-T1-E4, DG2750DN-T1-E4, STG3696EQTR) employ SPDT topology with inherent break-before-make characteristics. Detailed datasheets should be consulted for specific switching sequence timing requirements.

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