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Adafruit TCA9548A 1-to-8 I2C multiplexer (#2717): 17.78 × 30.48 mm board and 2 mounting holes
What are the Adafruit TCA9548A (product 2717) breakout dimensions and mounting-hole positions? · Modern device · basis: Adafruit's EagleCAD board file for the TCA9548A I2C multiplexer breakout, including its own dimension lines.
Also called: Adafruit TCA9548A, Adafruit 2717, TCA9548A I2C multiplexer, TCA9548A 1-to-8 I2C Multiplexer Breakout, I2C mux breakout, TCA9548A breakout board
Exact dimensions. Every file is drawn at true size with no tolerance added. The holes and pins that meet another part are listed below under Mating features, with the fit each joint needs; open those by your process's clearance before making the part. Mating features
- length
- 30.48 mm
- width
- 17.78 mm
- height
- 1.6 mm
Notes
- Board 17.78 × 30.48 with square corners, centred, board bottom at 0. Board thickness 1.6 is assumed (Adafruit's board file does not state it); everything else is from the board file.
- Two plated Ø2.5 mounting holes on the long centre line at (0, ±12.70): 25.40 apart, 2.54 in from each short edge.
- No STEMMA QT connectors on this SKU (2717); Adafruit's STEMMA QT I2C mux is a different board (PCA9548, product 5626).
- Not modelled: the two loose 1×12 0.1 in headers along the long edges, the TSSOP-24 chip and passives.
- All dimensions are exact nominal millimetres, true size, with no tolerance added.
Adafruit TCA9548A 1-to-8 I2C multiplexer (#2717): 17.78 × 30.48 mm… size chart
| hole | x (mm) | y (mm) | diameter (mm) |
|---|---|---|---|
| 1 | 0 | -12.70 | 2.5 |
| 2 | 0 | +12.70 | 2.5 |
Mating features
Drawn at the exact size. Open press, slide, run and socket features by your process's clearance (tolerances by process); leave designed gaps and clamp fits as drawn.
| feature | exact | mates with | fit | files |
|---|---|---|---|---|
| Mounting holes | 2 × Ø2.5, 25.40 apart on the centre line | M2.5 or #2-56 screws and standoffs | designed | all |
| Header rows | 2 × 1×12 at 2.54 pitch along the long edges | 0.1 in female headers or breadboard | designed | all |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| Adafruit | TCA9548A I2C Multiplexer (#2717) | web | Publisher's page; dimensions are facts |
| Adafruit | Adafruit-TCA9548A-I2C-Multiplexer-PCB repository | web | Publisher's page; dimensions are facts |
| Adafruit Learning System | Adafruit TCA9548A 1-to-8 I2C Multiplexer Breakout guide | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Generated by Xem Studio from the standard; threads are plain cylinders at major diameter. CC BY 4.0. index.json
| adafruit-tca9548a-2717 | Adafruit TCA9548A 1-to-8 I2C multiplexer (#2717): 17.78 × 30.48 mm board and 2 mounting holes | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=adafruit-tca9548a-2717
Fits with
Questions
How big is the Adafruit TCA9548A breakout?
17.78 × 30.48 mm, 1.6 mm board (assumed).
Where are its mounting holes?
Two Ø2.5 holes on the long centre line, 25.40 mm apart (2.54 mm from each short edge).
Does it have STEMMA QT connectors?
No. Product 2717 has only 0.1 in header pads; the STEMMA QT mux is the PCA9548 board, product 5626.