LoTI Board
About the LoTI Board
LoTI Board is an open source STM32 PCB design by devtank-ltd, published on GitHub under the CERN-OHL-W-2.0 license. It is a 4-layer board measuring 159.1 × 99.9 mm, with 330 components from 76 distinct parts.
Its main chip is the STM32F072RBTx, from the STM32 family. Other key parts include the INA250A4, LD1117S33TR_SOT223, AT25DN512CSSHF-B, AD8646 and 93LCxxA. By type, the board carries 152 resistors, 82 capacitors, 33 diodes, 23 ICs, 13 transistors and 11 inductors.
From the project
KiCAD files for Loti card for HILTOP
This documentation describes Open Hardware and is Licensed under CERN-OHL-W v2.
You may redistribute and modify this documentation under the terms of the CERN-OHL-W v2 (https://cern.ch/cern-ohl). This documentation is distributed WITHOUT ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING OF MERCHANTABILITY, SATISFACTORY QUALITY AND FITNESS FOR A PARTICULAR PURPOSE. Please see the CERN-OHL-W v2 for applicable conditions
Main components on the LoTI Board
LoTI Board bill of materials (BOM)
330 components, 76 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | INA250A4 | TSSOP-16_4.4x5mm_P0.65mm | U1 |
| 1 | LD1117S33TR_SOT223 | SOT-223-3_TabPin2 | U2 |
| 1 | AT25DN512CSSHF-B | SOIC-8_3.9x4.9mm_P1.27mm | U3 |
| 5 | AD8646 | SOIC-8_3.9x4.9mm_P1.27mm | U4, U5, U6, U7, U8 |
| 1 | 93LCxxA | SOIC-8_3.9x4.9mm_P1.27mm | U9 |
| 1 | LAN9513 | QFN-64-1EP_9x9mm_P0.5mm_EP7.3x7.3mm_ThermalVias | U10 |
| 1 | MIC2026-1YM | SOIC-8_3.9x4.9mm_P1.27mm | U11 |
| 1 | SP3003-02XJ | SC70-5 | U12 |
| 1 | CP2102N-A01-GQFN24 | QFN-24-1EP_4x4mm_P0.5mm_EP2.6x2.6mm_ThermalVias | U13 |
| 8 | BTS4140N | SOT-223 | U14, U15, U16, U17, U18, U19, U20, U21 |
| 1 | STM32F072RBTx | LQFP-64_10x10mm_P0.5mm | U22 |
| 1 | M74VHC1GT14DFT2G | SOT-353_SC-70-5 | U23 |
| 13 | ZXMN6A07F | SOT-23 | Q2, Q3, Q4, Q5, Q6, Q7, Q8, Q9 +5 |
| 1 | 25MHz Crystal | Crystal_SMD_SeikoEpson_FA238V-4Pin_3.2x2.5mm | Y1 |
| 1 | 8MHZ | Crystal_SMD_Abracon_ABM3C-4Pin_5.0x3.2mm | Y2 |
| 1 | ABS25-32.768KHZ-6-T | Crystal_SMD_7050-4Pin_7.0x5.0mm | Y3 |
| 1 | Conn_02x10_Odd_Even | IDC-Header_2x10_P2.54mm_Vertical | J1 |
| 1 | Conn_03x32_DIN41612 | Socket_DIN41612-CaseC1-full-Male-96Pin-3rows_correct | J3 |
| 1 | RJ45-TRANS_VALCON | RJ45_TRANSFO_VALCON | J4 |
| 1 | USB_A | USB_A_Vertical_Lumberg_2410_01 | J5 |
Show 56 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | Conn_02x08_Odd_Even | IDC-Header_2x08_P2.54mm_Vertical | J6 |
| 1 | Polyfuse | R_1206_3216Metric | F1 |
| 1 | Jumper_NC_Dual | PinHeader_1x03_P2.54mm_Vertical | JP1 |
| 5 | HRS1KH-S | Relay_SPDT_HRS1KH-S | K1, K2, K3, K4, K5 |
| 1 | SW_Push | SW_SPST_B3U-1000P | SW1 |
| 7 | GRN | LED_0603_1608Metric | D1, D2, D3, D6, D7, D10, D13 |
| 5 | BAT54T1G | D_SOD-123 | D4, D5, D8, D9, D11 |
| 1 | RED | LED_0402_1005Metric | D12 |
| 18 | BAV99 | SOT-23 | D14, D15, D16, D17, D18, D19, D20, D21 +10 |
| 1 | MBR230LSFT1G | D_SOD-123 | D32 |
| 1 | BAT42W | D_SOD-123 | D33 |
| 11 | 2A/0.05DCR | L_0805_2012Metric | L1, L2, L3, L4, L5, L6, L7, L8 +3 |
| 27 | 100nF | C_0603_1608Metric | C1, C9, C12, C14, C15, C16, C17, C18 +19 |
| 4 | 15pF | C_0402_1005Metric | C2, C3, C4, C5 |
| 1 | 22nF | R_0603_1608Metric | C6 |
| 3 | 100uF | CP_Elec_6.3x7.7 | C7, C8, C13 |
| 2 | 10uF | C_0805_2012Metric | C10, C11 |
| 2 | 100nF | R_1210_3225Metric | C19, C53 |
| 23 | 100nF | C_0402_1005Metric | C30, C32, C34, C39, C40, C41, C42, C43 +15 |
| 1 | 4.7uF | C_0603_1608Metric | C31 |
| 2 | 18pF | C_0402_1005Metric | C33, C37 |
| 2 | 1uF | C_0603_1608Metric | C35, C49 |
| 1 | 10nF | C_0402_1005Metric | C36 |
| 1 | DNF | C_0603_1608Metric | C52 |
| 1 | 4.7uF | C_0805_2012Metric | C55 |
| 8 | DNP | C_0805_2012Metric | C57, C58, C59, C63, C64, C65, C69, C70 |
| 2 | 18pF | C_0603_1608Metric | C75, C76 |
| 2 | 4.3pF | C_0603_1608Metric | C77, C78 |
| 13 | DNF | R_0603_1608Metric | R1, R2, R17, R25, R26, R27, R28, R29 +5 |
| 11 | 100R | R_0603_1608Metric | R3, R30, R31, R32, R33, R34, R35, R44 +3 |
| 12 | 330R | R_0603_1608Metric | R4, R5, R6, R20, R21, R22, R23, R24 +4 |
| 1 | 10R | R_0402_1005Metric | R7 |
| 2 | DNF | R_1206_3216Metric | R8, R9 |
| 2 | 0R | R_1206_3216Metric | R10, R11 |
| 15 | 0R | R_0603_1608Metric | R12, R76, R79, R80, R83, R84, R118, R119 +7 |
| 1 | 2.7K | R_0603_1608Metric | R13 |
| 13 | 10K | R_0603_1608Metric | R14, R18, R36, R38, R40, R42, R52, R53 +5 |
| 2 | 4K7 | R_0603_1608Metric | R15, R16 |
| 2 | 16K | R_0603_1608Metric | R19, R43 |
| 3 | 3K3 | R_0603_1608Metric | R37, R39, R41 |
| 5 | 2K2 | R_0603_1608Metric | R48, R49, R54, R55, R60 |
| 5 | 470R | R_0603_1608Metric | R50, R51, R56, R57, R61 |
| 1 | 1M | R_0402_1005Metric | R65 |
| 1 | 1K | R_0402_1005Metric | R66 |
| 2 | 10K | R_0402_1005Metric | R67, R68 |
| 1 | 12K | R_0402_1005Metric | R69 |
| 1 | 12.4K | R_0402_1005Metric | R70 |
| 4 | 49.9R | R_0402_1005Metric | R71, R72, R73, R74 |
| 1 | 24K | R_0603_1608Metric | R78 |
| 8 | 0R | R_0805_2012Metric | R85, R86, R87, R97, R98, R99, R109, R110 |
| 26 | 1K | R_0603_1608Metric | R88, R89, R90, R100, R101, R102, R111, R112 +18 |
| 8 | DNP | R_0805_2012Metric | R91, R92, R93, R103, R104, R105, R113, R114 |
| 8 | 100K | R_0603_1608Metric | R94, R95, R96, R106, R107, R108, R115, R116 |
| 1 | 1.25K | R_0603_1608Metric | R145 |
| 2 | 0R | R_1210_3225Metric | R150, R151 |
| 1 | 47K | R_0603_1608Metric | R152 |
LoTI Board design files
The KiCad project lives in the devtank-ltd/kicad_hiltop_loti_board repository on GitHub; these links point at the commit this page was built from.
LoTI Board: common questions
What microcontroller does the LoTI Board use?
The LoTI Board is built around the STM32F072RBTx, from the STM32 family.
How big is the LoTI Board?
The LoTI Board measures 159.1 × 99.9 mm, has 4 copper layers and is 1.6 mm thick.
How many components are on the LoTI Board?
330 components, from 76 distinct parts. The full bill of materials is listed on this page.
Where can I download the LoTI Board design files?
From the devtank-ltd/kicad_hiltop_loti_board repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the LoTI Board design in my own project?
Yes, under the terms of its CERN-OHL-W-2.0 license, which devtank-ltd chose for the repository.
Can I test firmware for the LoTI Board without the hardware?
Yes. HardLabs builds a simulation of the board from its netlist and BOM, so you can run and debug STM32 firmware against it before you order a PCB.
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