Overview
The TMUX1219DBVR, produced by Texas Instruments, is a general-purpose complementary metal-oxide semiconductor (CMOS) single-pole double-throw (SPDT) switch. This device is designed to switch between two source inputs based on the state of the SEL pin. It operates over a wide supply voltage range of 1.08 V to 5.5 V, making it versatile for various applications from personal electronics to building automation. The TMUX1219 supports bidirectional analog and digital signals and features low supply current, making it suitable for portable applications.
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage (VDD) | - | 1.08 | - | 5.5 | V |
| Transition Time (tTRAN) | VDD = 5 V, VS = 3 V, RL = 200 Ω, CL = 15 pF | 12 | - | 18 | ns |
| Break Before Make Time (tOPEN) | VDD = 5 V, VS = 3 V, RL = 200 Ω, CL = 15 pF | 8 | - | 1 | ns |
| Charge Injection (QC) | VDD = 1 V, RS = 0 Ω, CL = 1 nF | -3 | - | - | pC |
| Off Isolation (OISO) | RL = 50 Ω, CL = 5 pF, f = 1 MHz | -65 | - | - | dB |
| Crosstalk (XTALK) | RL = 50 Ω, CL = 5 pF, f = 1 MHz | -65 | - | - | dB |
| Bandwidth (BW) | RL = 50 Ω, CL = 5 pF | - | - | 250 | MHz |
| Source Off Capacitance (CSOFF) | f = 1 MHz | - | - | 7 | pF |
| On Capacitance (CSON) | f = 1 MHz | - | - | 23 | pF |
| Package | - | SC70 (6), SOT-23 (6) | - | - | - |
| Body Size (Nom) | - | 2.00 mm × 1.25 mm (SC70), 2.90 mm x 1.60 mm (SOT-23) | - | - | - |
Key Features
- Bidirectional Operation: The TMUX1219 conducts equally well from source to drain or from drain to source, supporting both analog and digital signals.
- Rail to Rail Operation: The valid signal path input/output voltage ranges from GND to VDD.
- 1.8 V Logic Compatible Inputs: The device has 1.8-V logic compatible control for the logic control input (SEL), allowing it to interface with processors that have lower logic I/O rails.
- Fail-Safe Logic: The TMUX1219 supports Fail-Safe Logic on the control input pin, allowing for operation up to 5.5 V regardless of the state of the supply pin.
- Low Supply Current: A low supply current of 4 nA makes it suitable for portable applications.
- Break-Before-Make Delay: Prevents two inputs from connecting when the device is switching, ensuring safe operation.
- Charge Injection: Minimal charge injection during switching, reducing signal distortion.
Applications
- Analog and Digital Switching: Suitable for switching both analog and digital signals.
- I2C and SPI Bus Multiplexing: Can be used to multiplex I2C and SPI bus signals.
- Remote Radio Units: Applicable in remote radio unit designs.
- Barcode Scanners: Used in barcode scanner applications.
- Motor Drives: Suitable for motor drive control systems.
- Building Automation: Used in various building automation systems.
- Analog Input Modules: Can be used in analog input module designs.
- Power Delivery: Applicable in power delivery systems.
- Video Surveillance: Used in video surveillance systems.
- Electronic Point of Sale: Suitable for electronic point of sale systems.
- Appliances and Consumer Audio: Used in various consumer appliances and audio systems.
Q & A
- What is the operating supply voltage range of the TMUX1219?
The TMUX1219 operates over a wide supply voltage range of 1.08 V to 5.5 V.
- What type of signals does the TMUX1219 support?
The TMUX1219 supports both analog and digital signals and conducts equally well in both directions.
- What is the significance of 1.8 V logic compatible inputs?
The 1.8 V logic compatible inputs allow the TMUX1219 to interface with processors that have lower logic I/O rails, eliminating the need for an external translator.
- What is Fail-Safe Logic in the TMUX1219?
Fail-Safe Logic allows voltages on the control pin to be applied before the supply pin, protecting the device from potential damage and minimizing system complexity.
- What is the transition time of the TMUX1219?
The transition time varies with supply voltage; for example, at VDD = 5 V, it is typically 12 ns.
- What is the break-before-make delay in the TMUX1219?
The break-before-make delay is a safety feature that prevents two inputs from connecting when the device is switching, typically around 8 ns at VDD = 5 V.
- How does the TMUX1219 handle charge injection?
The TMUX1219 has minimal charge injection during switching, which is denoted by the symbol QC and is typically around -3 pC.
- What are the package options for the TMUX1219?
The TMUX1219 is available in SC70 (6) and SOT-23 (6) packages.
- What are some common applications of the TMUX1219?
The TMUX1219 is used in various applications including analog and digital switching, I2C and SPI bus multiplexing, remote radio units, barcode scanners, motor drives, and more.
- How should the power supply be decoupled for the TMUX1219?
Good power-supply decoupling is important; use a supply decoupling capacitor ranging from 0.1 μF to 10 μF from VDD to ground, placed close to the power supply pins.
