The 74CBTLV3257 Quad Bus Switch is a logic IC in the LabWired part catalog. Its catalog type is 74cbtlv3257. It connects to the MCU over GPIO. The catalog gives a supply range of 2.3–3.6 V. It has 16 pins. A registered peripheral model runs in the engine: the firmware talks to it over the real bus and gets device-accurate responses.
From the catalog: Quad 1-of-2 FET bus switch (core/configs/devices/74cbtlv3257.yaml), 1 ns. ⚠️ A FET SWITCH IS NOT A BUFFER: on silicon it is four pass transistors and bidirectional through the closed path; modelled here as a one-way mux, because two pads cannot become one net. A design that drives Y and reads it back on the selected input side will not see its own data.
| Category | Logic ICs |
|---|---|
| Catalog type | 74cbtlv3257 |
| Interface | GPIO |
| Supply range | 2.3–3.6 V |
| Pins | 16 |
| Datasheet | Texas Instruments SN74CBTLV3257 datasheet |
Simulated device model
Built from the datasheet. Implemented from the part’s register documentation and exercised by automated tests. Nothing physical was ever placed next to it.
| Pin | Electrical type | Function |
|---|---|---|
A1 | Input | — |
B1 | Input | — |
Y1 | Tri-state | — |
A2 | Input | — |
B2 | Input | — |
Y2 | Tri-state | — |
A3 | Input | — |
B3 | Input | — |
Y3 | Tri-state | — |
A4 | Input | — |
B4 | Input | — |
Y4 | Tri-state | — |
S | Input | — |
OE | Input | — |
VCC | Power input | Supply |
GND | Power input | Supply |
Modelled from Texas Instruments SN74CBTLV3257 datasheet.