Exact device and ordering identity
TMUX131RMGR is a compact 12-pin RMG ordering option for TI’s TMUX131 high-bandwidth passive multiplexer. The device selects between signal paths for I3C/I2C and related use cases; it does not buffer an entire protocol transaction or supply a regenerated clock. Its two-channel 3:1 signal topology and 1.8 mm square mechanical footprint should be checked against the board’s specific pinout.
Alternative Parts — Engineering Review
Source-listed candidate part numbers:
- TS3USB3031RMGR
These source-listed candidates are for engineering evaluation only, not confirmed drop-in replacements. Verify voltages, current limits, pinout, footprint, qualification and relevant operating conditions before substitution.
Operating and control considerations
TI specifies a 2.5–4.3 V VDD range, 6.5 GHz typical small-signal bandwidth and 5.5 Ω typical on-resistance. Those measurements are distinct: the -3 dB bandwidth is not a promise of 6.5 Gb/s digital throughput, and typical RON/CON figures must be considered with source impedance, rise time, and bus capacitance. 1.8 V-compatible selection inputs and 5.5 V overvoltage tolerance on I/O pins expand logic compatibility but do not override absolute maximum conditions.
Package, sourcing and engineering trade-offs
An alternative device needs verification of both the 3:1 topology and the two-channel pinout, IOFF/power-down behavior, VDD requirements, and board parasitics at the intended I3C speed. Similar package dimensions are insufficient if logic polarity or passive bandwidth changes. For sourcing, specify full RMGR order code and note the target bus voltage and routing constraints.
Manufacturer-verified selection specifications
| Selection parameter | TI-verified value | Engineering condition |
|---|---|---|
| Vdd | VDD range: 2.5 V to 4.3 V | Refer to exact manufacturer operating conditions |
| Bandwidth | Bandwidth (–3 dB): 6.5 GHz | Refer to exact manufacturer operating conditions |
| Ron | RON: 5.5 Ω typical | Refer to exact manufacturer operating conditions |
| Con | CON: 1.3 pF typical | Refer to exact manufacturer operating conditions |
| Supply current | Supply current: 28 µA typical | Refer to exact manufacturer operating conditions |
| Logic | 1.8-V compatible control inputs (SEL) | Refer to exact manufacturer operating conditions |
| Ovt | Overvoltage tolerance (OVT) on all I/O pins up to 5.5 V | Refer to exact manufacturer operating conditions |
| Catalog package | WQFN-12(1.8×1.8) | Match exact TI mechanical drawing before footprint or replacement approval |
For lower-bandwidth single-channel analog routing that needs a 4-to-1 multiplexer rather than this dual-channel 3-to-1 high-speed I3C-compatible path switch, compare TMUX1204DGSR. The TMUX131 offers 6.5 GHz typical −3 dB bandwidth and a 2.5–4.3 V supply, whereas TMUX1204 is a general analog 4-to-1 mux with a different voltage range and substantially lower bandwidth. Different channel topology and packages make them unsuitable as direct replacements.
Procurement and datasheet
Request a quotation for TMUX131RMGR using the complete orderable number, target quantity and package requirement. Stock, pricing and delivery timing require a direct RFQ confirmation; no on-page availability or price is promised. Source-listed alternative candidates, where present, are for engineering evaluation and do not establish drop-in compatibility.
