Combined Module Panel
esl-epfl·X-MODs·Module_Panels/Combined_Module_Panel/Combined_Module_Panel.kicad_pcb
About the Combined Module Panel
Combined Module Panel is an open source PCB design by esl-epfl, published on GitHub. It is a 6-layer board measuring 93.2 × 113 mm, with 628 components from 44 distinct parts.
Other key parts include the MAX77654MENV+T, MX25U12832FZNI02-TR, MX25U25643GZ4I00-T, MAX17262REWL+T and TPS22916CYFPR. By type, the board carries 290 capacitors, 231 resistors, 76 ICs, 16 connectors and 11 inductors.
It belongs with the wearables designs in this gallery.
From the project
Modular hardware platform based on the RISC-V X-HEEP family architecture developed at ESL, targeting ultra-low-power consumption and miniaturization, facilitating the creation of wearable devices for clinical trials
A collection of compact, power-efficient PCB modules designed for rapid prototyping and development of wearable healthcare devices, with a focus on biosignal acquisition.
X-MODs provides a modular hardware approach that bridges the gap between fully custom designs and off-the-shelf solutions. The system consists of four specialized modules and their corresponding debug boards, enabling quick prototyping while maintaining the small form factor required for wearable applications.

Main components on the Combined Module Panel
Combined Module Panel bill of materials (BOM)
628 components, 44 distinct parts — part numbers from the project's BOM.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 7 | MAX77654MENV+T | WLCSP-30_2.788x2.338mm_P0.4mm | U1, U14, U19, U33, U38, U51, U59 |
| 7 | MX25U12832FZNI02-TR | 8-WSON_DUAL_(6x5mm)_8x6mn | U2, U15, U20, U34, U40, U52, U61 |
| 7 | MX25U25643GZ4I00-T | 8-WSON_DUAL_6x5mm_(8x6mn) | U3, U16, U21, U35, U41, U53, U62 |
| 7 | MAX17262REWL+T | WLCSP-9_1.468x1.448mm_P0.4mm | U4, U18, U24, U36, U44, U54, U65 |
| 4 | TPS22916CYFPR | DSBGA-4_0.74x0.74mm | U6, U23, U39, U56 |
| 4 | OPA310SIDBVR | SOT_23_5_SHDN | U7, U25, U42, U57 |
| 4 | TPS7A9401DSCR | WSON-10-3.15x3.15mm | U8, U26, U43, U58 |
| 4 | REF35250YBHR | DSBGA-4_1.085x0.870mm | U9, U27, U47, U66 |
| 4 | OPA333AIDBVR | SOT_23_5_SHDN | U10, U29, U48, U68 |
| 4 | SN74AUP1G14DSFR ~ | X2SON-6 | U11, U28, U45, U60 |
| 4 | W25Q128JWYIQ | WLCSP-21 | U12, U30, U46, U63 |
| 8 | SN74AUP2G08DQER ~ | X2SON-8 | U13, U17, U31, U32, U49, U50, U64, U67 |
| 4 | TMUX1104DQAR | USON-10_1x2.5mm | U69, U72, U75, U78 |
| 4 | LTC6255CS6#TRMPBF LTC6255IDC#TRMPBF | SOT_23_6 | U70, U73, U76, U79 |
| 4 | ADS8860IDRCT | VSON-10_3x3mm_P0.5 | U71, U74, U77, U80 |
| 16 | 212134-0003 | 2121340003 | J1, J2, J9, J10, J17, J18, J25, J26 +8 |
| 4 | SIT1532AC-J5-DCC-32.768D | SIT1532AC | OSC1, OSC2, OSC3, OSC4 |
| 4 | LI0402B301R-10 300R | L0402 | FB1, FB2, FB3, FB4 |
| 7 | DFE201612E-1R5M=P2 1u50 | L0806 | L1, L2, L3, L4, L5, L6, L7 |
| 121 | GRM155R71A104JA01D 100n 10V | C0402 | C1, C2, C8, C9, C10, C15, C17, C20 +113 |
Show 24 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 48 | C0402C105K8PACTU 1u00 10V | C0402 | C3, C4, C5, C11, C25, C32, C33, C34 +40 |
| 22 | GRM155R61C225KE44D 2u20 16V | C0402 | C6, C7, C48, C49, C79, C80, C126, C127 +14 |
| 35 | GRM188R61A226ME15D 22u0 10V | C0603 | C12, C14, C16, C18, C21, C58, C60, C64 +27 |
| 14 | GRM188R61E475KE11D 4u70 25V | C0603 | C13, C22, C59, C68, C86, C98, C132, C138 +6 |
| 16 | CL05A226MQ5CUN 22u0 6V3 | C0402 | C19, C39, C51, C88, C111, C116, C156, C183 +8 |
| 4 | MSASJ105BB5475MFNA01 4u70 6V3 | C0402 | C26, C93, C161, C222 |
| 7 | GRM15XR71C332KA86D 3n30 16V | C0402 | C27, C69, C99, C139, C176, C212, C254 |
| 7 | GRM155R60J474KE19D 470n 6V3 | C0402 | C28, C70, C100, C140, C180, C214, C257 |
| 8 | CL05B103JO5NNWC 10n0 16V | C0402 | C44, C56, C113, C121, C184, C192, C253, C262 |
| 4 | GRM155R60G106ME01D 10u0 4V | C0402 | C50, C115, C186, C258 |
| 4 | GCM1555C1H681FA16J 680p 50V | C0402 | C268, C275, C282, C289 |
| 84 | CRCW040210K0FKEDHP 10K0 | R0402 | R1, R2, R3, R4, R18, R19, R20, R21 +76 |
| 57 | RK73Z1ETTP 0R00 | R0402 | R5, R8, R9, R10, R12, R13, R15, R16 +49 |
| 30 | CRCW0402100KFKEDC 100K | R0402 | R6, R7, R24, R28, R36, R37, R44, R45 +22 |
| 4 | ERA-2ARC203X 20K0 | R0402 | R11, R68, R125, R172 |
| 4 | CRCW040220K0FKED 20K0 | R0402 | R14, R71, R128, R176 |
| 4 | CRCW04021M33FKED 1M33 | R0402 | R22, R72, R130, R188 |
| 8 | ERA-2ARC102X 1K00 | R0402 | R25, R46, R83, R98, R133, R153, R192, R206 |
| 4 | CRCW0402169KFKTD 169K | R0402 | R27, R84, R137, R195 |
| 8 | ERJ-2BQJR30X 0R30 | R0402 | R32, R43, R86, R92, R143, R151, R199, R205 |
| 8 | CRCW04021R00FKEDHP 1R00 | R0402 | R33, R47, R91, R99, R150, R154, R200, R207 |
| 8 | KDV04FR150ET 0R15 | R0402 | R212, R213, R217, R218, R222, R223, R227, R228 |
| 8 | RT0402BRD0739RL 39R0 | R0402 | R214, R216, R219, R221, R224, R226, R229, R231 |
| 4 | CRCW040222R0FKED 22R0 | R0402 | R215, R220, R225, R230 |
Combined Module Panel design files
The KiCad project lives in the esl-epfl/X-MODs repository on GitHub; these links point at the commit this page was built from.
Combined Module Panel: common questions
How big is the Combined Module Panel?
The Combined Module Panel measures 93.2 × 113 mm, has 6 copper layers and is 0.8 mm thick.
How many components are on the Combined Module Panel?
628 components, from 44 distinct parts, with part numbers taken from the project's own BOM. The full bill of materials is listed on this page.
Where can I download the Combined Module Panel design files?
From the esl-epfl/X-MODs repository on GitHub, which has the KiCad layout, the schematic and the BOM; the links under Design files point to each one.
Can I use the Combined Module Panel design in my own project?
The repository has no license, so all rights stay with esl-epfl. Use it as a reference, and ask the author before reusing the design.
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