PI3A223ZMEX Equivalent & Substitute Parts

Part Overview

The PI3A223ZMEX is an active SPDT (Single Pole Double Throw) analog switch IC manufactured by Diodes Incorporated. This 2-circuit, 2:1 multiplexer/demultiplexer device operates from a single supply voltage of 1.65V to 4.2V and features a maximum on-state resistance of 750mOhm. The component is housed in a 10-UQFN (1.8x1.4mm) surface mount package and is currently in active production status with RoHS3 compliance. Equivalent parts are identified when design requirements necessitate alternative sourcing, inventory availability, or performance optimization within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	2
On-State Resistance (Max)	750mOhm
Supply Voltage Range (Single)	1.65V ~ 4.2V
Operating Temperature	-40°C ~ 85°C
Package Type	10-UQFN (1.8x1.4mm)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the PI3A223ZMEX is determined by the following critical parameters:

Switch Configuration: Must be SPDT with 2:1 multiplexer/demultiplexer topology and 2 circuits
Package Compatibility: Must use 10-UQFN (1.8x1.4mm) surface mount package
Supply Voltage: Substitute must operate within or encompass the 1.65V ~ 4.2V range
On-State Resistance: Substitute maximum on-state resistance must not exceed 750mOhm
Temperature Range: Must support -40°C ~ 85°C operating temperature
Compliance: Must maintain RoHS3 compliance and REACH unaffected status

The TS3A5223RSWR from Texas Instruments meets all substitution criteria. While it features a lower maximum on-state resistance (600mOhm) and improved leakage characteristics, its supply voltage range (1.65V ~ 3.6V) is a subset of the PI3A223ZMEX specification, making it suitable for applications operating within this narrower voltage window.

Parameter Comparison

Parameter	PI3A223ZMEX (Diodes Inc.)	TS3A5223RSWR (Texas Instruments)
Manufacturer	Diodes Incorporated	Texas Instruments
Switch Circuit	SPDT	SPDT
Multiplexer/Demultiplexer Circuit	2:1	2:1
Number of Circuits	2	2
On-State Resistance (Max)	750mOhm	600mOhm
Channel-to-Channel Matching (ΔRon)	50mOhm (Typ)	50mOhm
Voltage - Supply, Single (V+)	1.65V ~ 4.2V	1.65V ~ 3.6V
-3dB Bandwidth	84MHz	80MHz
Charge Injection	50pC	40pC
Current - Leakage (IS(off)) (Max)	1µA	5nA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	10-UQFN (1.8x1.4mm)	10-UQFN (1.8x1.4mm)
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active

Engineering Selection Recommendations

Both the PI3A223ZMEX and TS3A5223RSWR are active production components with full RoHS3 compliance and REACH unaffected status, ensuring regulatory compliance for current and future applications.

Selection between these parts is determined by supply voltage requirements:

PI3A223ZMEX: Select when applications require operation at supply voltages above 3.6V, up to 4.2V. This part accommodates the full extended voltage range.
TS3A5223RSWR: Select when supply voltage is constrained to 3.6V or below. This substitute offers superior on-state resistance (600mOhm vs. 750mOhm) and significantly lower leakage current (5nA vs. 1µA), providing performance advantages in low-power applications.

Both components share identical package geometry, pin configuration, and temperature operating range, ensuring direct mechanical and thermal compatibility.

Frequently Asked Questions (FAQ)

Q: Can TS3A5223RSWR replace PI3A223ZMEX in all applications?

A: No. The TS3A5223RSWR supply voltage maximum is 3.6V, while the PI3A223ZMEX supports up to 4.2V. Substitution is valid only for designs operating at 3.6V or below.

Q: Are the packages physically identical?

A: Yes. Both components use the 10-UQFN (1.8x1.4mm) surface mount package with identical pin assignments and footprint requirements.

Q: What is the significance of the lower on-state resistance in the TS3A5223RSWR?

A: Lower on-state resistance (600mOhm vs. 750mOhm) reduces signal attenuation and power dissipation in switching applications, improving overall circuit efficiency.

Q: Do both parts meet the same compliance standards?

A: Yes. Both PI3A223ZMEX and TS3A5223RSWR are RoHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Q: What is the impact of leakage current differences?

A: The TS3A5223RSWR exhibits significantly lower leakage current (5nA vs. 1µA). In battery-powered or ultra-low-power applications, this 200x reduction in leakage improves standby power consumption.

Q: Are there bandwidth or switching speed differences?

A: Minor differences exist. The PI3A223ZMEX provides 84MHz bandwidth with 13ns/38ns switching times, while the TS3A5223RSWR provides 80MHz bandwidth with 70ns/75ns switching times. For most general-purpose switching applications, both are functionally equivalent.

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