TS3A5018PWR - 10-Ohm Quad SPDT Analog Switch | Texas Instruments
MPN: TS3A5018PWR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.55 | $0.55 |
| 10 | $0.49 | $4.90 |
| 100 | $0.4 | $40.00 |
| 500 | $0.32 | $160.00 |
| 1,000 | $0.24 | $240.00 |
TS3A5018PWR Overview
An analog switch is a semiconductor device that selectively connects or disconnects an analog signal path under digital control. It is a fundamental signal-routing building block in the broader family of multiplexers, demultiplexers, and interface ICs. Analog switches provide a low-resistance path when ON and a high-impedance path when OFF, replacing bulky mechanical relays in audio/video routing, data acquisition, and communication systems.
Key features include the wide 1.8V to 3.6V operating range (ideal for battery-powered and 3.3V systems), low 10-ohm ON-state resistance with excellent channel-to-channel matching, and low charge injection that minimizes glitches during switch transitions. All four SPDT switches share a common enable function so the entire device can be disabled to reduce power consumption.
The TS3A5018 is built on TI CMOS process technology, providing low quiescent power dissipation and high reliability. Bidirectional signal flow means either of the two throw terminals can serve as the port, essential for multiplexing and demultiplexing on the same hardware. Turn-on and turn-off times are fast, supporting high-speed signal routing in data converters and communication interfaces.
Typical applications include audio signal routing in portable devices, battery-powered data acquisition front ends, communication interface switching, and test equipment signal multiplexing. The low power consumption and wide supply range make it well suited for portable and industrial designs.
Design consideration: the 10-ohm ON resistance introduces series attenuation in high-impedance circuits, so prefer low-impedance loads or buffer the switched node. Place a 0.1uF decoupling capacitor close to the V+ pin, and use the enable pin in battery designs to cut standby current when switching is idle.
Drop-in alternatives for TS3A5018PWR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TS3A5018PWR (same form factor and footprint) — differing in Signal Range.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TS3A5018QPWRQ1
✅ Drop-In✓ In Stock
$0.45 / Unit
View Datasheet →TS3A5018PWG4
✅ Drop-In📋 Reference alternative (not in catalog)
TS3A5018PWRE4
✅ Drop-In📋 Reference alternative (not in catalog)
TS5V330PW
⚡ Same Package📋 Reference alternative (not in catalog)
MAX4535
⚡ Same Package ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TS3A5018PWR Maximum Ratings & Electrical Characteristics
| Function | Quad SPDT (2:1) analog switch |
| Number of Channels | 4 |
| Supply Voltage Range | 1.8 V to 3.6 V |
| ON-State Resistance | 10 ohm |
| Signal Range | Up to V+ (bidirectional) |
| Signal Type | Analog and digital |
| Configuration | SPDT 2:1 multiplexer/demultiplexer |
| Charge Injection | Low |
| Operating Temperature | -40C to +85C |
| Package | TSSOP-16 (PW) |
| Mounting Type | Surface Mount |
| Common Enable | Yes |
| Quiescent Power Dissipation | Low (CMOS) |
| RoHS Status | Compliant |
| On-Resistance Matching | Excellent (channel-to-channel) |
TS3A5018PWR Pin Configuration
| Pin 1 | 1NO — Channel 1 normally-open terminal |
| Pin 2 | 1COM — Channel 1 common terminal |
| Pin 3 | 1NC — Channel 1 normally-closed terminal |
| Pin 4 | 2NO — Channel 2 normally-open terminal |
| Pin 5 | 2COM — Channel 2 common terminal |
| Pin 6 | 2NC — Channel 2 normally-closed terminal |
| Pin 7 | GND — Ground |
| Pin 8 | 3NO — Channel 3 normally-open terminal |
| Pin 9 | 3COM — Channel 3 common terminal |
| Pin 10 | 3NC — Channel 3 normally-closed terminal |
| Pin 11 | 4NO — Channel 4 normally-open terminal |
| Pin 12 | 4COM — Channel 4 common terminal |
| Pin 13 | 4NC — Channel 4 normally-closed terminal |
| Pin 14 | IN — Select control input |
| Pin 15 | EN — Enable (device disable when inactive) |
| Pin 16 | V+ — Power supply, 1.8V to 3.6V |
Typical Applications
TS3A5018PWR is suitable for 6 applications: Portable Audio Signal Routing, Battery-Powered Data Acquisition Front End, Communication Interface Switching, Test and Measurement Signal Multiplexing, Industrial Control Signal Selection, Automotive Body and Infotainment Switching.
Portable Audio Signal Routing
The TS3A5018PWR's 10-ohm ON resistance and low charge injection make it ideal for switching headphone, line-level, and microphone signals in portable audio products. Because signals up to V+ pass bidirectionally, one device can multiplex between two sources (line-in vs mic) with minimal insertion loss and no audible switching clicks. Placed between the codec output and the headphone jack with short traces and a 0.1uF V+ decoupling cap, the 1.8V to 3.6V supply range matches single-cell Li-ion and 3.3V rails directly. The shared enable pin mutes all four channels for power savings when audio is idle.
Recommended
Battery-Powered Data Acquisition Front End
In battery-powered DAQ front ends, the TS3A5018PWR multiplexes sensor outputs into a single ADC channel, saving cost and board space. The 10-ohm Ron introduces little series error relative to typical 10k sensor source impedances, and low charge injection minimizes glitches during channel changes that could disturb the ADC sampling aperture. The 1.8V to 3.6V supply range supports two-cell alkaline and single-cell Li-ion designs, while the common enable disconnects all channels during sleep, extending battery life. Pair with a precision ADC such as the ADS1220 for best accuracy.
Recommended
Communication Interface Switching
The TS3A5018PWR routes digital and analog signals in UART, SPI, and audio bus switching between redundant peripherals. Its bidirectional signal path up to V+ allows a shared bus to be steered to either of two devices with a single control line, and the CMOS process ensures low quiescent power in always-on gateways. With 1.8V to 3.6V operation, it interfaces directly with 3.3V MCU I/O banks without level-shifting. Fast turn-on and turn-off times keep switching latency negligible relative to serial interface timing.
Recommended
Test and Measurement Signal Multiplexing
Bench instruments and automated test fixtures use the TS3A5018PWR to steer four signal paths between measurement channels. The 10-ohm ON resistance with excellent channel-to-channel matching keeps calibration constants uniform across channels, reducing per-channel correction effort. Operating from 1.8V to 3.6V with -40C to +85C rating allows use in both benchtop and field-portable instruments. The shared enable disconnects all four paths between tests, protecting the downstream measurement chain from unexpected source voltages.
Recommended
Industrial Control Signal Selection
In industrial controllers, the TS3A5018PWR selects between redundant sensor inputs or drives one of two actuator setpoints under MCU control. The -40C to +85C operating range covers factory floor conditions, and the wide 1.8V to 3.6V supply tolerates regulated 3.3V rail variation. Low ON-state resistance preserves signal fidelity across the switch, and CMOS quiescent power keeps dissipation negligible in sealed enclosures. For safety-relevant designs, the automotive-qualified TS3A5018QPWRQ1 drop-in variant provides AEC-Q100 assurance on the same footprint.
Recommended
Automotive Body and Infotainment Switching
For automotive infotainment and body-electronics modules, the pin-compatible TS3A5018QPWRQ1 variant of this device provides AEC-Q100-qualified switching of audio sources and sensor signals. Its quad SPDT configuration with shared enable routes microphone arrays, audio sources, or diagnostic signals while meeting automotive temperature and quality requirements. The 1.8V to 3.6V supply matches 3.3V automotive logic rails, and low Ron of 10 ohms keeps analog signal loss minimal across channel selections.
Recommended
Recommended Products Summary
Engineering reference data for TS3A5018PWR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TS3A5018QPWRQ1 | TS3A5018PWG4 | TS3A5018PWRE4 | TS5V330PW |
|---|---|---|---|---|---|
| Package | TSSOP-16 (PW) | TSSOP-16 (PW) - same | TSSOP-16 (PW) - same | TSSOP-16 (PW) - same | TSSOP-16 (PW) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| ON-State Resistance | 10 ohm | 10 ohm | 10 ohm | 10 ohm | ~13 ohm |
| Channel Configuration | Quad SPDT (2:1) | Quad SPDT (2:1) | Quad SPDT (2:1) | Quad SPDT (2:1) | 4-bit SPDT video switch |
| Enable Pin | Yes (common) | Yes (common) | Yes (common) | Yes (common) | No (per-bit select) |
| AEC-Q100 Qualified | No | Yes | No | No | No |
Key Differentiators
- Low 10-ohm ON resistance in a low-voltage switch (vs TS5V330PW)
- Shared enable for multi-channel power saving (vs TS5V330PW)
- Automotive drop-in option (vs TS3A5018QPWRQ1)
Design Notes
Place a 0.1uF ceramic decoupling capacitor within 2-3 mm of the V+ pin (pin 16) to ground. The 1.8V to 3.6V supply should be clean and free of transients exceeding V+, since signal swing is limited to V+. In battery designs, use the shared EN pin to disable all four channels and reduce standby consumption when switching is idle.
The 10-ohm ON resistance forms a divider with the load impedance: a 10k load loses only ~0.1%, but a 100-ohm load loses nearly 10%. Prefer low-impedance loads or buffer the switched node with a rail-to-rail op-amp. Keep switched analog traces short and away from clock lines; low charge injection limits but does not eliminate transition glitches.
Signals must not exceed V+ or go below GND - adding series resistors before the switch input protects against overrange during power-off. Do not leave the select (IN) pin floating; tie it through a pull resistor to a defined state at reset. For drop-in use of the Q1 variant in the same footprint, verify temperature rating extension is compatible with adjacent components.
Compliance Information
RoHS compliant per TI product page. For AEC-Q100 applications use the TS3A5018QPWRQ1 variant.
