TS5A3159DBVT Equivalent & Substitute Parts

Part Overview

The TS5A3159DBVT is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Texas Instruments, packaged in SOT-23-6 surface mount configuration. This device functions as a 2:1 multiplexer/demultiplexer with 1.1Ohm on-state resistance and operates across a supply voltage range of 1.65V to 5.5V. The part is classified as Last Time Buy, indicating discontinued production status. Equivalent and substitute parts are necessary to maintain design continuity and ensure long-term component availability for new production runs and legacy system support.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	1
On-State Resistance (Max)	1.1Ohm
Channel-to-Channel Matching (ΔRon)	100mOhm
Supply Voltage Range (V+)	1.65V ~ 5.5V
Switch Time (Ton/Toff Max)	35ns / 20ns
-3dB Bandwidth	100MHz
Charge Injection	36pC
Channel Capacitance (CS(off), CD(off))	23pF
Leakage Current (IS(off) Max)	2nA
Operating Temperature Range	-40°C ~ 85°C
Package Type	SOT-23-6
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the TS5A3159DBVT is determined by the following critical parameters:

Primary Substitution Criteria:

Switch circuit configuration (SPDT)
Multiplexer/demultiplexer circuit (2:1)
Single circuit count
Supply voltage compatibility (minimum 1.65V ~ 5.5V overlap required)
Surface mount packaging capability
RoHS3 compliance

Secondary Compatibility Factors:

On-state resistance tolerance (lower values provide improved performance)
Operating temperature range (must encompass or exceed -40°C ~ 85°C)
Switching speed and bandwidth characteristics
Leakage current specifications

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications with different packaging) and manufacturer-recommended alternatives (functionally compatible with performance trade-offs).

Parameter Comparison

Parameter	TS5A3159DBVT (Main)	TS5A3159DBVR (Equivalent)	74LVC1G3157GV,125 (Alternative)	STG3157CTR (Alternative)
Manufacturer	Texas Instruments	Texas Instruments	Nexperia USA Inc.	STMicroelectronics
Switch Circuit	SPDT	SPDT	SPDT	SPDT
Multiplexer Configuration	2:1	2:1	2:1	2:1
On-State Resistance (Max)	1.1Ohm	1.1Ohm	10Ohm	15Ohm
Channel-to-Channel Matching	100mOhm	100mOhm	Not specified	100mOhm
Supply Voltage (V+)	1.65V ~ 5.5V	1.65V ~ 5.5V	1.65V ~ 5.5V	1.65V ~ 4.3V
Switch Time Ton (Max)	35ns	35ns	4ns	15ns
Switch Time Toff (Max)	20ns	20ns	4.6ns	10ns
-3dB Bandwidth	100MHz	100MHz	300MHz	250MHz
Charge Injection	36pC	36pC	7.5pC	23pC
Channel Capacitance	23pF	23pF	6pF	5pF
Leakage Current (Max)	2nA	2nA	5µA	100nA
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-55°C ~ 125°C
Package / Case	SOT-23-6	SOT-23-6	SC-74, SOT-457 (6-TSOP)	6-TSSOP, SC-88, SOT-363 (SOT-323-6L)
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

TS5A3159DBVR (Parametric Equivalent)

The TS5A3159DBVR is the direct parametric equivalent to the TS5A3159DBVT. Both parts share identical electrical specifications, including 1.1Ohm on-state resistance, 100mOhm channel matching, and 100MHz bandwidth. The sole difference is packaging format: TS5A3159DBVR is supplied in Cut Tape (CT) & Digi-Reel® format versus Tape & Reel (TR) for the main part. Both maintain ROHS3 compliance and Active product status. This substitute is suitable for direct replacement in all applications where the TS5A3159DBVT was originally specified, with no circuit redesign required.

74LVC1G3157GV,125 (Manufacturer-Recommended Alternative)

The 74LVC1G3157GV,125 from Nexperia USA Inc. is a functionally compatible SPDT 2:1 switch with superior performance characteristics. This part offers faster switching times (4ns/4.6ns versus 35ns/20ns), higher bandwidth (300MHz versus 100MHz), and lower charge injection (7.5pC versus 36pC). However, on-state resistance is significantly higher at 10Ohm compared to 1.1Ohm. The supply voltage range remains compatible (1.65V ~ 5.5V), and operating temperature extends to 125°C. Package format differs (6-TSOP versus SOT-23-6), requiring PCB layout modification. This substitute is appropriate for applications prioritizing switching speed and bandwidth over low on-state resistance, with extended temperature operation capability.

STG3157CTR (Manufacturer-Recommended Alternative)

The STG3157CTR from STMicroelectronics is a SPDT 2:1 switch with moderate performance trade-offs. On-state resistance is 15Ohm, representing the highest among available substitutes. Supply voltage range is restricted to 1.65V ~ 4.3V, which may limit applicability in designs requiring 5.5V operation. Operating temperature range extends to 125°C with lower temperature floor at -55°C. Switching times (15ns/10ns) and bandwidth (250MHz) fall between the TS5A3159DBVT and 74LVC1G3157GV,125. Package format is SOT-323-6L (6-TSSOP), requiring PCB redesign. This substitute is suitable only for applications where supply voltage does not exceed 4.3V and where higher on-state resistance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can TS5A3159DBVR be used as a direct drop-in replacement for TS5A3159DBVT?

A: Yes. The TS5A3159DBVR is electrically identical to the TS5A3159DBVT with matching specifications across all critical parameters. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel). No circuit modifications are required for substitution.

Q: What are the key differences between TS5A3159DBVT and 74LVC1G3157GV,125?

A: The primary differences are on-state resistance (1.1Ohm versus 10Ohm), switching speed (35ns/20ns versus 4ns/4.6ns), and package type (SOT-23-6 versus 6-TSOP). The 74LVC1G3157GV,125 provides superior high-frequency performance but higher insertion loss. PCB layout changes are necessary due to different package footprints.

Q: Is STG3157CTR suitable for 5.5V supply applications?

A: No. The STG3157CTR maximum supply voltage is 4.3V, which is below the 5.5V upper limit of the TS5A3159DBVT. This part is not recommended for applications requiring operation at 5.5V.

Q: Do all substitute parts maintain RoHS3 compliance?

A: Yes. All listed substitute parts (TS5A3159DBVR, 74LVC1G3157GV,125, and STG3157CTR) are ROHS3 compliant, matching the compliance status of the main part.

Q: Which substitute offers the lowest on-state resistance?

A: The TS5A3159DBVR maintains the lowest on-state resistance at 1.1Ohm, identical to the main part. The 74LVC1G3157GV,125 and STG3157CTR have higher on-state resistances at 10Ohm and 15Ohm respectively.

Q: What is the operating temperature range for each substitute?

A: TS5A3159DBVT and TS5A3159DBVR operate from -40°C to 85°C. The 74LVC1G3157GV,125 and STG3157CTR extend to 125°C maximum, with STG3157CTR offering a lower minimum of -55°C.

Q: Are package changes required when substituting with 74LVC1G3157GV,125 or STG3157CTR?

A: Yes. Both alternatives use different package formats (6-TSOP and SOT-323-6L respectively) compared to the SOT-23-6 of the main part. PCB footprint redesign and layout modifications are necessary.

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