Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Qualification | AEC-Q100 automotive, Grade 1 −40°C to +125°C |
| Configuration | 1-channel 8:1 bidirectional mux |
| Supply | 1.62 V to 5.5 V |
| Protection | Injection-current control and no ESD-diode back-power path to VDD |
| Logic | 1.8 V compatible, fail-safe |
| Switching | Rail-to-rail, break-before-make |
| Compatibility | Pin-compatible target with industry-standard 4051/4851 |
| Exact Package / Packing | WQFN (BQB), 16 pins; 3000-piece large tape and reel |
Product Overview
TMUX1308QBQBRQ1 is the automotive-qualified TMUX1308-Q1 8:1 multiplexer, not the generic commercial TMUX1308 identity. It is designed for diagnostics/monitoring nodes where analog inputs may be driven before the mux supply is valid or may experience injection current.
The injection-current-control/back-power architecture helps prevent an overdriven channel from corrupting other channels or powering VDD through a conventional ESD diode. This is particularly useful in automotive sensor diagnostics and multi-rail systems with independent sequencing.
The exact QBQBRQ1 order code is active AEC-Q100 Grade-1, WQFN(BQB)-16, −40°C to +125°C and 3000-piece large-reel packaging. The Q1 suffix is an automotive qualification identity, not packing decoration.
For related devices, see HKEQGOO’s Analog Switches & Multiplexers category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TMUX1308QBQBRQ1 |
| Qualification | AEC-Q100 automotive, Grade 1 −40°C to +125°C |
| Configuration | 1-channel 8:1 bidirectional mux |
| Supply | 1.62 V to 5.5 V |
| Protection | Injection-current control and no ESD-diode back-power path to VDD |
| Logic | 1.8 V compatible, fail-safe |
| Switching | Rail-to-rail, break-before-make |
| Compatibility | Pin-compatible target with industry-standard 4051/4851 |
| Exact Package / Packing | WQFN (BQB), 16 pins; 3000-piece large tape and reel |
| Manufacturer Status | Active / Production |
| Part Marking | TMUX1308-Q1 family BQB marking per TI part data |
Functional Highlights
Injection current control improves faulted-channel behavior
A sensor pin outside the normal powered state can otherwise inject current into supply/other channels. The protection architecture reduces that interaction, but external series/protection networks are still required for system-level transient energy.
No VDD ESD-diode path helps power sequencing
Inputs can be present before VDD without simply back-powering the mux rail. Logic/signal voltages still must respect the exact powered-off protection limits.
Design Considerations
- Use the Q1 family limits for automotive fault/transient design rather than the commercial TMUX1308 page.
- Add board-level protection sized for expected ISO/load-dump/ESD environment; the mux feature is not a surge suppressor.
- Keep mux source impedance/ADC settling within the acquisition budget after any protective series resistance.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TMUX1308QBQBRQ1 as Active automotive orderable part; WQFN (BQB), 16 pins; 3000-piece large tape and reel; AEC-Q100 Grade 1, −40°C to +125°C.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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