Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Configuration | 4 independently controlled SPST channels |
| Supply | 1.5 V to 5.5 V |
| Bandwidth | 3 GHz stated feature |
| On-Capacitance | 3.3 pF stated feature |
| On-Resistance | 2 Ω stated feature |
| Powered-Off Protection | Signal path protected up to 3.6 V at VDD=0 |
| Logic | 1.8 V compatible; fail-safe with internal pulldowns |
| Exact Package / Packing | TSSOP (PW), 14 pins; 2000-piece large tape and reel |
Product Overview
TMUX1511PWR is a four-channel 1:1 switch aimed at high-speed digital/analog path isolation rather than precision sensor multiplexing. Its 3 GHz bandwidth and low capacitance suit JTAG, SPI and similar interfaces where adding a normal analog switch could degrade edge integrity.
Powered-off protection allows signal pins to tolerate up to the specified level when VDD is removed, helping isolate an unpowered module from an active bus and prevent back-powering through the switch.
Each channel is independently controlled, unlike the common-select 4-channel SPDT TMUX1574. That control difference determines whether the design needs four separate enables or one bank-wide path selector.
For related devices, see HKEQGOO’s Analog Switches & Multiplexers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TMUX1511PWR |
| Configuration | 4 independently controlled SPST channels |
| Supply | 1.5 V to 5.5 V |
| Bandwidth | 3 GHz stated feature |
| On-Capacitance | 3.3 pF stated feature |
| On-Resistance | 2 Ω stated feature |
| Powered-Off Protection | Signal path protected up to 3.6 V at VDD=0 |
| Logic | 1.8 V compatible; fail-safe with internal pulldowns |
| Exact Package / Packing | TSSOP (PW), 14 pins; 2000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | MUX1511 |
Functional Highlights
Powered-off protection enables cleaner board/module isolation
An unpowered peripheral can be disconnected while the upstream bus remains active. System pull-ups/pulldowns and external ESD paths still need to avoid alternate back-power routes.
3 GHz switch bandwidth does not guarantee signal-integrity transparency
Package/trace stubs, source/load impedance and switch capacitance still affect fast interfaces; eye/timing validation should use the actual PCB stackup.
Design Considerations
- Check powered-off signal voltage against the specified protected range, not merely normal VDD.
- Model/measure insertion loss and edge shape for the actual SPI/JTAG speed and routing.
- Use defined control defaults so channels remain in the intended isolation state during host reset.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TMUX1511PWR as Active / Production; TSSOP (PW), 14 pins; 2000-piece large tape and reel; Level-1-260C-UNLIM; −40°C to +125°C; marking MUX1511.
Related Engineering Resources
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