TS3A5018D Equivalent & Substitute Parts

Part Overview

The TS3A5018D is a 4-circuit SPDT analog switch IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This component functions as a 2:1 multiplexer/demultiplexer with 10Ohm on-state resistance, designed for low-voltage signal routing applications operating from 1.65V to 3.6V. The part is currently in Last Time Buy status, making identification of active equivalent alternatives essential for ongoing design support and procurement planning.

Key Parameters

Parameter	Value
Manufacturer Part Number	TS3A5018D
Manufacturer	Texas Instruments
Category	Interface
Switch Circuit Configuration	SPDT
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	2:1
On-State Resistance (Max)	10Ohm
Voltage - Supply, Single (V+)	1.65V ~ 3.6V
Switch Time (Ton, Toff) (Max)	8ns, 6.5ns
-3dB Bandwidth	300MHz
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 85°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the TS3A5018D is determined by the following critical parameters: identical switch circuit configuration (SPDT), matching number of circuits (4), equivalent multiplexer ratio (2:1), compatible on-state resistance (10Ohm maximum), identical package type (16-SOIC), and overlapping or compatible operating temperature range (-40°C to 85°C).

The substitute parts identified fall into two categories based on electrical performance alignment:

Category 1 - Direct Functional Equivalent (TS3A5018DR): Identical electrical specifications across all measured parameters, differing only in packaging format (Cut Tape & Digi-Reel versus Tube). This part maintains active product status.

Category 2 - Functional Substitute with Parameter Variance (PI5A100WE, PI5A100WEX): These Diodes Incorporated parts share the core functional architecture (4-circuit SPDT 2:1 switch, 10Ohm on-state resistance, 16-SOIC package) but exhibit measurable differences in secondary electrical characteristics including channel-to-channel matching tolerance, supply voltage range, switching speed, bandwidth, and leakage current specifications. The PI5A100WEX variant maintains active product status.

Parameter Comparison

Parameter	TS3A5018D	TS3A5018DR	PI5A100WE	PI5A100WEX
Manufacturer	Texas Instruments	Texas Instruments	Diodes Incorporated	Diodes Incorporated
Switch Circuit	SPDT	SPDT	SPDT	SPDT
Number of Circuits	4	4	4	4
Multiplexer/Demultiplexer Circuit	2:1	2:1	2:1	2:1
On-State Resistance (Max)	10Ohm	10Ohm	10Ohm	10Ohm
Channel-to-Channel Matching (ΔRon)	300mOhm	300mOhm	800mOhm	800mOhm
Voltage - Supply, Single (V+)	1.65V ~ 3.6V	1.65V ~ 3.6V	2V ~ 6V	2V ~ 6V
Switch Time Ton (Max)	8ns	8ns	15ns	15ns
Switch Time Toff (Max)	6.5ns	6.5ns	7ns	7ns
-3dB Bandwidth	300MHz	300MHz	230MHz	230MHz
Charge Injection	2pC	2pC	10pC (Max)	10pC (Max)
Channel Capacitance (CS(off), CD(off))	4.5pF, 9pF	4.5pF, 9pF	8pF, 14pF	8pF, 14pF
Current - Leakage (IS(off)) (Max)	100nA	100nA	10µA (Typ)	10µA (Typ)
Crosstalk	-48dB @ 10MHz	-48dB @ 10MHz	-100dB @ 10MHz	-100dB @ 10MHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Last Time Buy	Active	Discontinued at DiGi Electronics	Active

Engineering Selection Recommendations

TS3A5018DR is the primary recommended substitute for TS3A5018D applications. This Texas Instruments part maintains identical electrical specifications and is currently in Active product status, ensuring long-term availability and supply chain continuity. The only distinction is packaging format (Cut Tape & Digi-Reel versus Tube), which does not affect functional performance. This part is suitable for direct replacement in all TS3A5018D circuit implementations.

PI5A100WEX is a secondary substitute option for applications where the Diodes Incorporated PI5A100 family meets design requirements. This part is currently Active and maintains the core 4-circuit SPDT 2:1 switch architecture in the identical 16-SOIC package. Selection of PI5A100WEX requires verification that the following parameter differences are acceptable within the application: reduced channel-to-channel matching tolerance (800mOhm versus 300mOhm), extended supply voltage range (2V to 6V versus 1.65V to 3.6V), slower switching time (15ns Ton versus 8ns), reduced bandwidth (230MHz versus 300MHz), higher charge injection (10pC versus 2pC), and increased leakage current (10µA typical versus 100nA). The PI5A100WEX exhibits superior crosstalk performance (-100dB versus -48dB at 10MHz).

PI5A100WE is not recommended for new designs due to discontinued product status at DiGi Electronics, despite current inventory availability.

Frequently Asked Questions (FAQ)

Q: Can TS3A5018DR be used as a direct replacement for TS3A5018D?

A: Yes. TS3A5018DR is electrically identical to TS3A5018D across all specified parameters. The parts differ only in packaging format (Cut Tape & Digi-Reel versus Tube). Both are manufactured by Texas Instruments and housed in the 16-SOIC package. TS3A5018DR is currently in Active product status.

Q: What are the key differences between TS3A5018D and PI5A100WEX?

A: Both parts share identical core functionality (4-circuit SPDT 2:1 switch, 10Ohm on-state resistance, 16-SOIC package, -40°C to 85°C operating range). PI5A100WEX differs in: channel-to-channel matching tolerance (800mOhm versus 300mOhm), supply voltage range (2V to 6V versus 1.65V to 3.6V), switching speed (15ns Ton versus 8ns), bandwidth (230MHz versus 300MHz), charge injection (10pC versus 2pC), and leakage current (10µA typical versus 100nA). PI5A100WEX provides superior crosstalk performance (-100dB versus -48dB at 10MHz).

Q: Is PI5A100WEX suitable for low-voltage applications requiring 1.65V supply?

A: No. PI5A100WEX operates from 2V minimum supply voltage, which exceeds the TS3A5018D lower limit of 1.65V. Applications requiring operation below 2V supply voltage must use TS3A5018D or TS3A5018DR.

Q: Can PI5A100WE be used in new designs?

A: PI5A100WE is discontinued at DiGi Electronics and is not recommended for new designs. PI5A100WEX is the active equivalent from Diodes Incorporated and should be selected for new applications requiring the PI5A100 family.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. TS3A5018D, TS3A5018DR, PI5A100WE, and PI5A100WEX are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Do the substitute parts require PCB layout modifications?

A: No. All substitute parts use the identical 16-SOIC (0.154", 3.90mm Width) package and surface mount configuration. PCB footprints and layout remain unchanged.

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