PTMUX1574DYYR Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The PTMUX1574DYYR is a low-capacitance 4-channel 2:1 SPDT analog multiplexer with powered-off protection, controlled by 1.8 V logic. It features a maximum on-state resistance of 4.5 Ω, 75 dB off-state isolation, and 0.07 Ω resistance matching across channels. Designed for portable and wearable applications, it protects downstream circuits when supply power is removed.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- PTMUX1574DYYR Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of PTMUX1574DYYR?
- 4-channel 2:1 SPDT analog switch with powered-off protection
- Maximum on-state resistance of 4.5 Ω with 0.07 Ω channel matching
- 75 dB off-state isolation for minimal signal crosstalk
- 1.8 V logic control compatible with low-power MCUs
- Low capacitance design for high-frequency signal routing
- Powered-off protection prevents back-drive damage when VCC is removed
- 16-pin TSSOP package for compact PCB footprint
What is PTMUX1574DYYR used for?
The PTMUX1574DYYR is designed for smartphone, tablet, and wearable device signal routing applications where multiple audio, sensor, or data interfaces must share signal paths with minimal insertion loss and crosstalk at 1.8 V logic levels. Its powered-off protection feature prevents back-drive current from damaging upstream circuits during hot-swap or battery-disconnect events, making it suitable for USB and headset accessory detection switches. Industrial handheld instruments and portable medical monitoring devices also use this device to multiplex analog measurement channels while ensuring safe operation during power sequencing.
What are the specifications of PTMUX1574DYYR?
| Date Of Intro | 2019-08-31 |
| YTEOL | 0 |
| Analog IC - Other Type | SPDT |
| JESD-30 Code | R-PDSO-G16 |
| Normal Position | NO/NC |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Off-state Isolation-Nom | 75dB |
| On-state Resistance Match-Nom | 0.07Ω |
| On-state Resistance-Max (Ron) | 4.5Ω |
| Output | COMMON OUTPUT |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Switch-off Time-Max | 95ns |
| Switch-on Time-Max | 35000ns |
| Switching | BREAK-BEFORE-MAKE |
| Technology | CMOS |
| Temperature Grade | AUTOMOTIVE |
| Terminal Form | GULL WING |
| Terminal Position | DUAL |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| HTS Code | 8542.39.00.60 |
Where can I find the PTMUX1574DYYR datasheet?
PTMUX1574DYYR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for PTMUX1574DYYR?
Compatible alternatives and drop-in replacements for PTMUX1574DYYR:
Frequently Asked Questions
What on-resistance does PTMUX1574DYYR offer and how does it affect analog signal quality?
The PTMUX1574DYYR provides a maximum on-state resistance of 4.5 Ω with a typical channel-to-channel matching of 0.07 Ω. In audio signal path applications, this low resistance introduces minimal resistive loading and voltage drop across the switch, preserving signal integrity for analog audio, sensor, or ADC input signals. The tight 0.07 Ω matching across 4 channels also ensures consistent gain across multiplexed measurement channels in precision data acquisition designs.
How does the powered-off protection feature of PTMUX1574DYYR benefit hot-swap designs?
When the supply voltage VCC drops to 0 V, the PTMUX1574DYYR's powered-off protection circuitry prevents any external signal voltage present on switch terminals from back-driving current into the device or connected downstream components. This behavior is critical in battery-powered portable devices where accessories such as headsets or USB peripherals may be connected before the system fully powers on, and it eliminates the need for external protection diodes in the signal path, reducing component count.
Is PTMUX1574DYYR compatible with 1.8 V microcontroller GPIO logic for direct control?
Yes, the PTMUX1574DYYR accepts 1.8 V logic control signals directly from modern low-voltage MCU GPIO pins without level translation. Input high threshold is compatible with 1.8 V CMOS logic levels, making it a natural companion for ARM Cortex-M0+ and application processors in smartphones and IoT devices operating from 1.8 V I/O rails. This avoids additional level-shifting circuitry and reduces overall BOM complexity and board area.
What off-state isolation does PTMUX1574DYYR provide and why does it matter for multi-channel sensor designs?
The PTMUX1574DYYR achieves 75 dB off-state isolation at 1 MHz, which means signals on unselected channels are attenuated by a factor exceeding 5000, preventing crosstalk between simultaneously active sensor channels. In wearable health monitors with multiple analog sensor inputs sharing a single ADC, 75 dB isolation ensures that a strong photoplethysmography signal does not contaminate a weak ECG measurement path, maintaining the signal-to-noise performance needed for medical-grade measurements.
How does PTMUX1574DYYR compare to a standard TS3A5018 for a 4-channel SPDT multiplexer application?
Compared to the TS3A5018, the PTMUX1574DYYR adds powered-off protection and targets lower-capacitance signal paths suited for high-frequency audio and RF-adjacent applications. The TS3A5018 offers lower on-resistance around 1 Ω at 3.3 V supply but lacks integrated powered-off protection, requiring external blocking diodes in hot-swap scenarios. For a 1.8 V system with hot-swap requirements and moderate bandwidth signals up to 10 MHz, PTMUX1574DYYR provides a more integrated and robust solution.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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