TS5A3159ADBVT Equivalent & Substitute Parts

Part Overview

The TS5A3159ADBVT is a single-circuit SPDT analog switch manufactured by Texas Instruments, housed in a SOT-23-6 surface mount package. This component functions as a 2:1 multiplexer/demultiplexer with 900mOhm on-state resistance and operates across a 1.65V to 5.5V single supply voltage range. The part is designated as Last Time Buy, indicating end-of-life status. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for applications requiring SPDT switching functionality.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	1
On-State Resistance (Max)	900mOhm
Channel-to-Channel Matching (ΔRon)	50mOhm
Supply Voltage Range (Single)	1.65V ~ 5.5V
Switch Time (Ton/Toff Max)	30ns / 20ns
-3dB Bandwidth	100MHz
Package Type	SOT-23-6
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TS5A3159ADBVT is determined by the following critical parameters: SPDT switch circuit topology, 2:1 multiplexer configuration, single-circuit design, and surface mount packaging. The on-state resistance, switching speed, bandwidth, and supply voltage range define the electrical performance envelope within which substitutes must operate.

Two substitute categories exist:

Parametric Equivalent (Direct Replacement): Parts maintaining identical electrical specifications and package form factor, enabling direct PCB substitution without design modification.

Manufacturer-Recommended Substitute (Performance Alternative): Parts offering superior electrical performance characteristics with different package geometry, requiring PCB layout adjustment but providing enhanced functionality.

Parameter Comparison

Parameter	TS5A3159ADBVT	TS5A3159ADBVR	STG3157CTR
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics
Switch Circuit	SPDT	SPDT	SPDT
Multiplexer Configuration	2:1	2:1	2:1
Number of Circuits	1	1	1
On-State Resistance (Max)	900mOhm	900mOhm	15Ohm
Channel-to-Channel Matching (ΔRon)	50mOhm	50mOhm	100mOhm
Supply Voltage Range (Single)	1.65V ~ 5.5V	1.65V ~ 5.5V	1.65V ~ 4.3V
Switch Time Ton (Max)	30ns	30ns	15ns
Switch Time Toff (Max)	20ns	20ns	10ns
-3dB Bandwidth	100MHz	100MHz	250MHz
Charge Injection	-20pC	-20pC	23pC
Channel Capacitance (CS(off), CD(off))	18pF	18pF	5pF
Leakage Current (Max)	20nA	20nA	100nA
Crosstalk	-64dB @ 1MHz	-64dB @ 1MHz	-55dB @ 10MHz
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-55°C ~ 125°C
Package / Case	SOT-23-6	SOT-23-6	SOT-323-6L
Product Status	Last Time Buy	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TS5A3159ADBVR (Parametric Equivalent): This Texas Instruments part is the primary substitute for the TS5A3159ADBVT. It maintains identical electrical specifications and package geometry, enabling direct PCB substitution. The TS5A3159ADBVR carries Active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry equivalent regulatory certifications. Selection of this substitute eliminates design rework while preserving all electrical performance characteristics.

STG3157CTR (Manufacturer-Recommended Substitute): This STMicroelectronics part offers superior electrical performance with reduced on-state resistance (15Ohm versus 900mOhm), faster switching times, and extended bandwidth (250MHz versus 100MHz). The STG3157CTR operates across a narrower supply voltage range (1.65V ~ 4.3V) and requires PCB layout modification due to SOT-323-6L package geometry. This substitute is appropriate for designs where enhanced switching performance and lower on-state resistance provide system-level benefits that justify layout redesign. The extended operating temperature range (-55°C ~ 125°C) supports broader environmental applications. STG3157CTR maintains Active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can TS5A3159ADBVR be used as a direct replacement for TS5A3159ADBVT without PCB modification?

A: Yes. The TS5A3159ADBVR is electrically and mechanically identical to the TS5A3159ADBVT. Both parts use SOT-23-6 packaging and maintain the same pin configuration, electrical specifications, and performance characteristics. Direct PCB substitution is possible without design changes.

Q: What are the key differences between TS5A3159ADBVR and STG3157CTR?

A: The primary differences are on-state resistance (900mOhm versus 15Ohm), package type (SOT-23-6 versus SOT-323-6L), supply voltage range (1.65V ~ 5.5V versus 1.65V ~ 4.3V), and switching performance. STG3157CTR offers superior electrical performance but requires PCB layout redesign.

Q: Is STG3157CTR compatible with designs specified for TS5A3159ADBVT?

A: STG3157CTR is functionally compatible as a 2:1 SPDT switch but requires verification of supply voltage requirements. If the design operates above 4.3V, STG3157CTR is not suitable. The different package geometry requires PCB layout modification. Electrical performance improvements may benefit signal integrity in high-frequency applications.

Q: What is the significance of the TS5A3159ADBVT Last Time Buy status?

A: Last Time Buy designation indicates the part is at end-of-life. Texas Instruments will discontinue production. Existing inventory remains available, but long-term supply cannot be guaranteed. Transitioning to TS5A3159ADBVR (Active status) is recommended for new designs and ongoing production requirements.

Q: Are all three parts RoHS compliant?

A: Yes. TS5A3159ADBVT, TS5A3159ADBVR, and STG3157CTR are all ROHS3 compliant and carry equivalent regulatory certifications (REACH Unaffected, ECCN EAR99).

Q: Which substitute should be selected for cost optimization?

A: Selection criteria depend on design requirements. TS5A3159ADBVR provides cost-neutral substitution with identical performance. STG3157CTR may offer cost advantages in high-volume applications where superior performance justifies layout redesign, but requires engineering validation.

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