PI5A124TEX IC Switch SPDT Equivalent & Substitute Parts

Part Overview

The PI5A124TEX is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Diodes Incorporated in SOT-23-6 surface mount package. This interface component operates with a single supply voltage range of 2V to 6V and features 10Ohm on-state resistance with 326MHz bandwidth capability. The part is classified as Last Time Buy, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring SPDT switching functionality in compact form factors.

Key Parameters

Parameter	PI5A124TEX Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	1
On-State Resistance (Max)	10Ohm
Channel-to-Channel Matching (ΔRon)	200mOhm
Supply Voltage Range (V+)	2V ~ 6V
Switch Time Ton/Toff (Max)	15ns / 7ns
-3dB Bandwidth	326MHz
Package / Case	SOT-23-6
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the PI5A124TEX is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Switch circuit configuration must be SPDT with 2:1 multiplexer/demultiplexer topology
Single circuit count (1 circuit)
Package type must be SOT-23-6 for mechanical compatibility
Surface mount mounting type
Operating temperature range must encompass or exceed -40°C to 85°C minimum

Secondary Compatibility Parameters:

On-state resistance (Ron) and channel-to-channel matching (ΔRon) determine signal integrity and crosstalk performance
Supply voltage range must support the 2V to 6V operating window or broader range
Switch timing characteristics (Ton, Toff) and bandwidth affect signal fidelity in high-speed applications
Leakage current specifications impact low-signal applications

Substitutes are grouped into two categories based on electrical performance alignment with the PI5A124TEX baseline specifications.

Parameter Comparison

Part Number	Manufacturer	Ron (Max)	ΔRon	V+ Range	Ton/Toff (Max)	Bandwidth	Package	Temp Range	Status
PI5A124TEX	Diodes Inc.	10Ohm	200mOhm	2V ~ 6V	15ns / 7ns	326MHz	SOT-23-6	-40°C ~ 85°C	Last Time Buy
PI5A124TEX-1413	Diodes Inc.	10Ohm	200mOhm	2V ~ 6V	15ns / 7ns	326MHz	SOT-23-6	-40°C ~ 85°C	Active
ADG719BRTZ-500RL7	Analog Devices	4Ohm	—	1.8V ~ 5.5V	7ns / 3ns	200MHz	SOT-23-6	-40°C ~ 125°C	Active
ADG719BRTZ-REEL	Analog Devices	4Ohm	—	1.8V ~ 5.5V	7ns / 3ns	200MHz	SOT-23-6	-40°C ~ 125°C	Active
ADG719BRTZ-REEL7	Analog Devices	4Ohm	—	1.8V ~ 5.5V	7ns / 3ns	200MHz	SOT-23-6	-40°C ~ 125°C	Active
ADG719SRJZ-EP-RL7	Analog Devices	4Ohm	—	1.8V ~ 5.5V	7ns / 3ns	200MHz	SOT-23-6	-55°C ~ 125°C	Active
ADG819BRTZ-500RL7	Analog Devices	600mOhm	60mOhm	1.8V ~ 5.5V	45ns / 16ns	17MHz	SOT-23-6	-40°C ~ 125°C	Active
ADG819BRTZ-REEL	Analog Devices	600mOhm	60mOhm	1.8V ~ 5.5V	45ns / 16ns	17MHz	SOT-23-6	-40°C ~ 125°C	Active
ADG819BRTZ-REEL7	Analog Devices	600mOhm	60mOhm	1.8V ~ 5.5V	45ns / 16ns	17MHz	SOT-23-6	-40°C ~ 125°C	Active
ISL43210IHZ-T	Renesas Electronics	20Ohm	800mOhm	2.7V ~ 12V	25ns / 17ns	—	SOT-23-6	-40°C ~ 85°C	Active
ISL84544IHZ-T	Renesas Electronics	60Ohm	800mOhm	2.7V ~ 12V	100ns / 75ns	—	SOT-23-6	-40°C ~ 85°C	Active

Engineering Selection Recommendations

Direct Parametric Equivalent: PI5A124TEX-1413 is the primary equivalent, manufactured by Diodes Incorporated with identical electrical specifications and SOT-23-6 packaging. This part maintains the same 10Ohm on-state resistance, 200mOhm channel matching, 2V to 6V supply range, and 326MHz bandwidth. The distinction is packaging format (Tape & Reel versus Cut Tape) and active product status, making it the recommended replacement for discontinued PI5A124TEX inventory.

Analog Devices ADG719 Series (ADG719BRTZ-500RL7, ADG719BRTZ-REEL, ADG719BRTZ-REEL7, ADG719SRJZ-EP-RL7): These parts offer superior on-state resistance (4Ohm versus 10Ohm) and faster switching times (7ns/3ns versus 15ns/7ns), resulting in lower power dissipation and improved signal integrity for high-speed applications. Supply voltage range is 1.8V to 5.5V, which overlaps the PI5A124TEX window but does not extend to 6V. Operating temperature extends to 125°C. ADG719SRJZ-EP-RL7 provides extended temperature range (-55°C to 125°C) for harsh environment applications. All maintain SOT-23-6 packaging and active product status.

Analog Devices ADG819 Series (ADG819BRTZ-500RL7, ADG819BRTZ-REEL, ADG819BRTZ-REEL7): These parts feature significantly lower on-state resistance (600mOhm) optimized for low-impedance signal paths and analog audio/video applications. Reduced bandwidth (17MHz) and slower switching times (45ns/16ns) indicate suitability for lower-frequency applications where the PI5A124TEX's 326MHz capability is not required. Supply range 1.8V to 5.5V and extended temperature to 125°C. All maintain SOT-23-6 packaging and active status.

Renesas Electronics ISL43210IHZ-T: This part operates with 20Ohm on-state resistance and extended supply voltage range (2.7V to 12V), accommodating higher voltage systems. Channel matching of 800mOhm is higher than PI5A124TEX. Switching times (25ns/17ns) are slower. Operating temperature range matches PI5A124TEX (-40°C to 85°C). SOT-23-6 packaging and active status maintained.

Renesas Electronics ISL84544IHZ-T: This part features 60Ohm on-state resistance with 800mOhm channel matching, suitable for applications where higher impedance is acceptable. Extended supply voltage range (2.7V to 12V) and slower switching times (100ns/75ns) indicate low-frequency signal switching applications. Operating temperature and packaging match PI5A124TEX specifications. Active product status.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status consistent with the original PI5A124TEX.

Frequently Asked Questions (FAQ)

Q: Can PI5A124TEX-1413 be used as a direct replacement for PI5A124TEX? A: Yes. PI5A124TEX-1413 is electrically and mechanically identical to PI5A124TEX, with the same on-state resistance (10Ohm), channel matching (200mOhm), supply voltage range (2V to 6V), switching times, and bandwidth (326MHz). The only difference is packaging format (Tape & Reel versus Cut Tape) and active product status. It is the recommended direct replacement.

Q: What is the primary difference between ADG719 and ADG819 series substitutes? A: The ADG719 series offers lower on-state resistance (4Ohm) and faster switching times (7ns/3ns), making it suitable for high-speed, low-impedance applications. The ADG819 series features much lower on-state resistance (600mOhm) but significantly reduced bandwidth (17MHz) and slower switching times (45ns/16ns), optimized for low-frequency analog signal switching. Selection depends on application bandwidth requirements.

Q: Are all substitute parts compatible with the 2V to 6V supply voltage of PI5A124TEX? A: No. Analog Devices ADG719 and ADG819 series operate at 1.8V to 5.5V, which does not extend to 6V. Renesas ISL43210IHZ-T and ISL84544IHZ-T operate at 2.7V to 12V, which exceeds 6V but has a higher minimum voltage. Applications requiring operation at exactly 6V must use PI5A124TEX-1413 or verify that the substitute's 5.5V maximum is acceptable.

Q: What is the significance of channel-to-channel matching (ΔRon)? A: Channel-to-channel matching specifies the maximum difference in on-state resistance between the two switch channels. PI5A124TEX specifies 200mOhm matching. Lower matching values (such as ADG819 at 60mOhm) indicate better channel uniformity, reducing crosstalk and improving signal fidelity in stereo audio or differential signal applications. Higher matching values (such as Renesas parts at 800mOhm) are acceptable for applications where channel symmetry is less critical.

Q: Can ISL43210IHZ-T or ISL84544IHZ-T be used in high-speed applications? A: No. These Renesas parts lack specified -3dB bandwidth values and feature slower switching times (25ns/17ns for ISL43210IHZ-T and 100ns/75ns for ISL84544IHZ-T) compared to PI5A124TEX (15ns/7ns, 326MHz). They are optimized for low-frequency analog switching and are not suitable for applications requiring the 326MHz bandwidth of the original part.

Q: What is the operating temperature consideration for ADG719SRJZ-EP-RL7? A: ADG719SRJZ-EP-RL7 extends the operating temperature range to -55°C to 125°C, compared to PI5A124TEX at -40°C to 85°C. This extended range is beneficial for industrial, automotive, or aerospace applications requiring operation in extreme temperature environments. All other ADG719 variants operate at -40°C to 125°C.

Q: Are all substitute parts available in SOT-23-6 packaging? A: Yes. All listed substitute parts are available in SOT-23-6 surface mount package, ensuring mechanical compatibility with PCB layouts designed for PI5A124TEX. Renesas parts are specified as 6-SOT, which is equivalent to SOT-23-6.

Q: What compliance certifications apply to all substitute parts? A: All substitute parts maintain ROHS3 compliance, Moisture Sensitivity Level 1 (Unlimited), and REACH Unaffected status, consistent with PI5A124TEX. ECCN classification is EAR99 and HTSUS code is 8542.39.0001 for all parts listed.

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