4 layers20.3 × 45.5 mm
SX1257-PMOD
xil-se/SX1257-PMOD
This is a PMOD built around the SX1257 transceiver. It uses an I2C-SPI bridge (SC18IS602B) since only 8 io pins are used.
48 parts21
2 layers30 × 40.1 mm
I2CSPI01
mlab-modules/I2CSPI01Allows connection of SPI devices to I2C bus and is capable co handle up to four SPI slaves. Not used chip-select pins can be used as GPIO pins.
- Size
- 30 × 40.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 22
- Nets
- 17
- Pads
- 82
- Tracks, vias
- 135, 1
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 5 Apr 2022
- Updated
- 30 Nov 2025
Overview
I2CSPI01 is an open-source printed circuit board by mlab-modules, from the mlab-modules/I2CSPI01 repository on GitHub. It is a 2-layer board of 30 × 40.1 mm with 22 parts on 17 nets, routed with 135 tracks and 1 via.
It is built around the SC18IS602B. Its parts include 11 connectors, 7 resistors, 2 capacitors, 1 IC and 1 diode.
Main components
1README
README.mdI2CSPI01 - I2C to SPI bridge
The I2CSPI01 module is designed for systems where a microcontroller with only an I2C interface needs to communicate with one or more SPI peripherals. It acts as a bridge that translates I2C commands into SPI signals, allowing integration of SPI devices such as ADCs, DACs, memory chips, or sensors into an I2C-based architecture. This simplifies wiring and reduces the number of required signals.
Features
- I2C to SPI bridge based on SC18IS602B
- Supports up to four SPI slave devices
- Unused chip-select pins configurable as GPIO
- SPI clock modes: 0, 1, 2, 3
- SPI speed configurable: 58 kHz to 1.843 MHz
- GPIOs support multiple modes: quasi-bidirectional, push-pull, input-only, open-drain
- 200-byte internal buffer
- Operates as I2C slave and SPI master
- 3.3V supply voltage
Specifications
| Parameter | Value |
|---|---|
| Power Supply | Max. 3.6 V |
| Dimensions | 40.13 x 30.00 x 16 mm |
| Interface | I2C (up to 400 kHz), SPI (up to 1.843 MHz) |
| IC Used | SC18IS602B |
Assembly Notes
- One via must be drilled due to a PCB short.
- J5 header is not functional due to PCB layout issue.
Resources
Parts
22| Qty | Value | Footprint | References |
|---|---|---|---|
| 5 | 10k | SMD_Packages:SMD-0805 | R1, R2, R4, R6, R7 |
| 4 | _ | Dira:MountingHole_3mm | P1, P2, P3, P4 |
| 3 | CONN_2 | Hrebinky:Pin_Header_Straight_1x02 | J5, J6, J7 |
| 1 | - | SMD_Packages:SMD-0805 | R5 |
| 1 | 0R | SMD_Packages:SMD-0805 | R3 |
| 1 | 100nF | SMD_Packages:SMD-0805 | C1 |
| 1 | 10uF | SMD_Packages:SMD-0805 | C2 |
| 1 | BZV55C-3,6V | MLAB_D:Diode-MiniMELF_Standard | D1 |
| 1 | JUMP_3X2 | Hrebinky:Pin_Header_Straight_2x03 | J4 |
| 1 | JUMP_3X2 | Pin_Header_Straight_1x03:Pin_Header_Straight_2x03 | J1 |
| 1 | JUMP_5X2 | Hrebinky:Pin_Header_Straight_2x05 | J2 |
| 1 | JUMP_7X2 | Hrebinky:Pin_Header_Straight_2x07 | J3 |
| 1 | SC18IS602B | SMD_Packages:TSSOP-16 | U1 |
Questions
How big is the I2CSPI01 PCB?
It measures 30 × 40.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the I2CSPI01 use?
22 parts, built around the SC18IS602B. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the I2CSPI01 KiCad files?
From the mlab-modules/I2CSPI01 repository on GitHub, at the commit this page was made from: the board is hw/sch_pcb/I2CSPI01.kicad_pcb and its schematic hw/sch_pcb/I2CSPI01.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the I2CSPI01 design in my own project?
Its repository states no licence, so its author keeps all rights: ask mlab-modules before reusing the design.
Similar boards
- 2 layers155 × 114 mm
IOExpansion
ja1umi/MUTIF09Project
Various design materials for building my 8-bit-microprocessor-based single board computer(s)
198 parts10MIT - 2 layers50 × 35 mm
Epaper
meerstern/e-Paper_I2C_Module
e-Paper I2Cモジュールは[WAVESHARE製200x200, 1.54inch E-Inkディスプレイ][0]を搭載したモジュールです。 [WAVESHARE製200x200, 1.54inch E-Inkディスプレイ][0]はSPI接続ですが、 配線の容易性を実現するために[SPI I2CプロトコルブリッジIC SC18IS602B][1]を搭載してI2C化しています。…
38 parts2 - 4 layers36.2 × 17.9 mm
- 2 layers58 × 43 mm
- 2 layers158 × 11 mm
Daylight Matchstick
VoronDesign/Voron-Hardware
Cool Hardware designed by the Voron Design group
22 parts1.1kGPL-3.0 - 2 layers57 × 65 mm
Rgb to hdmi
hoglet67/RGBtoHDMI
Bare-metal Raspberry Pi project that provides pixel-perfect sampling of Retro Computer RGB/YUV video and conversion to HDMI
22 parts1kGPL-3.0 - 2 layers81 × 57.2 mm
RP2040-Macropad
hackclub/OnBoard
💡 Join 1,000 teenagers and make your first PCB with a $100 grant!
22 parts915