2 layers38 × 66.1 mm
4 layers15 × 35.1 mm
STEP
OlinSTEP/2023-EEFirmware and EE documentation for 2023 STEP
- Size
- 15 × 35.1 mm
- Copper layers
- 4
- Thickness
- 4.69 mm
- Parts
- 59
- Nets
- 58
- Pads
- 218
- Tracks, vias
- 419, 119
- Pours
- 12
- Routed
- Yes
- KiCad
- KiCad 6 (file 20211014)
- Created
- 3 Mar 2023
- Updated
- 18 Apr 2023
Overview
STEP is an open-source printed circuit board by OlinSTEP, from the OlinSTEP/2023-EE repository on GitHub. It is a 4-layer board of 15 × 35.1 mm with 59 parts on 58 nets, routed with 419 tracks and 119 vias.
It is built around the MLPF-WB55-01E3, PKMCS0909E4000-R1 and CL21A475KAQNNNE, with the DFE201612E-2R2M=P2, SSM3K35CTC and AOCA32116E among its other parts. Its parts include 20 capacitors, 18 resistors, 8 ICs, 3 transistors and 2 connectors. It belongs with the STM32 boards of this library.
Main components
7
MLPF-WB55-01E3
SMD-6P,1.6x1mm-40℃~+105℃ 1.1dB 2.4GHz~2.5GHz 50Ω Low Pass SMD-6P,1.6x1mm RF Filters ROHSSTMicroelectronicsRF Filters
PKMCS0909E4000-R1
SMD,9x9mm-40℃~+85℃ 1.9mm 12.5V 4kHz 65dB 9mm 9mm Passive (Externally Driven) Piezoelectric SMD,9x9mm Buzzers ROHSMurataBuzzers
CL21A475KAQNNNE
080525V 4.7uF X5R ±10% 0805 Multilayer Ceramic Capacitors MLCC - SMD/SMT ROHSSamsung Electro-MechanicsMultilayer Ceramic Capacitors MLCC - SMD/SMT
DFE201612E-2R2M=P2
08061.8A 116mΩ 2.2uH 2.4A ±20% 0806 Power Inductors ROHSMurataPower Inductors
SSM3K35CTC
DFN1006-3LMOSFETsTECH PUBLICAOCA32116E
AlphaDFN-4(1.2x1.2)-55℃~+150℃ 1.3V 1.7W 2 N-Channel 20V 36mΩ@4.5V 5.5nC@4.5V 6A Common Drain AlphaDFN-4(1.2x1.2) MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
NX1612SA-32.000MHZ-CHP-CIS-3
SMD1612-4P-40℃~+85℃ 100Ω 32MHz 6pF ±10ppm ±20ppm SMD1612-4P Crystals ROHSNDKCrystals
README
README.md2023-EE
Firmware and EE documents for 2023 STEP
Parts
59| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | C_100nF | Capacitor_SMD:C_0402_1005Metric | C3, C4, C9, C10, C12, C14 |
| 6 | R_10K | Resistor_SMD:R_0402_1005Metric | R7, R8, R9, R10, R11, R12 |
| 3 | C_100pF | Capacitor_SMD:C_0201_0603Metric | C6, C8, C11 |
| 3 | C_XF | Capacitor_SMD:C_0402_1005Metric | C17, C19, C20 |
| 2 | C_10uF | Capacitor_SMD:C_0402_1005Metric | C5, C18 |
| 2 | C_4.7uF | Capacitor_SMD:C_0402_1005Metric | C1, C15 |
| 2 | L_2.2uH | Inductor_SMD:L_0805_2012Metric_Pad1.05x1.20mm_HandSolder | L1, L2 |
| 2 | PKMCS0909E4000-R1 | step_footprints:SPKR_PKMCS0909E4000-R1 | U6, U8 |
| 2 | R_100k | Resistor_SMD:R_0402_1005Metric | R14, R16 |
| 2 | R_200k | Resistor_SMD:R_0402_1005Metric | R13, R15 |
| 2 | SSM3K35CTC | Package_TO_SOT_SMD:SOT-883 | Q2, Q3 |
| 2 | Test_Point_SMD | TestPoint:TestPoint_Pad_1.5x1.5mm | TP1, TP2 |
| 1 | AOCA32116E | step_footprints:AOCA32116E | Q1 |
| 1 | BQ297xy | Package_SON:WSON-6_1.5x1.5mm_P0.5mm | U2 |
| 1 | C_0.1uF | Capacitor_SMD:C_0402_1005Metric | C2 |
| 1 | C_100nF | Capacitor_SMD:C_0201_0603Metric | C13 |
| 1 | C_10nF | Capacitor_SMD:C_0402_1005Metric | C7 |
| 1 | C_YF | Capacitor_SMD:C_0402_1005Metric | C16 |
| 1 | LED_Amber | LED_SMD:LED_0402_1005Metric | D1 |
| 1 | LM3671TL-1V8/NOPB | step_footprints:SOT-23-5 | U3 |
| 1 | LM3671TL-ADJ/NOPB | step_footprints:SOT-23-5 | U7 |
| 1 | LSM6DSO32TR | step_footprints:LSM6DSO32TR | U1 |
| 1 | MLPF-WB55-01E3 | step_footprints:MLPF-WB55-01E3 | AE1 |
| 1 | Molex_Conn_uFL_0734120110 | Connector_Coaxial:U.FL_Molex_MCRF_73412-0110_Vertical | U5 |
| 1 | Molex_FFC_FPC_VERT_8POS_0.5MM_SMD_0525590853 | step_footprints:tbf | J1 |
| 1 | NX1612SA-32.000MHZ-CHP-CIS-3 | step_footprints:OSCSC105P160X120X35-4N | Y1 |
| 1 | R_0 | Jumper:SolderJumper-2_P1.3mm_Open_TrianglePad1.0x1.5mm | R6 |
| 1 | R_100K | Resistor_SMD:R_0402_1005Metric | R4 |
| 1 | R_1K | Resistor_SMD:R_0402_1005Metric | R5 |
| 1 | R_2.2K | Resistor_SMD:R_0402_1005Metric | R2 |
| 1 | R_200K | Resistor_SMD:R_0402_1005Metric | R3 |
| 1 | R_330 | Resistor_SMD:R_0402_1005Metric | R1 |
| 1 | R_X | Resistor_SMD:R_0402_1005Metric | R18 |
| 1 | R_Y | Resistor_SMD:R_0402_1005Metric | R17 |
| 1 | STM32WB55CEU6TR | step_footprints:QFN50P700X700X60-49N | U4 |
| 1 | TC2030-IDC-TAGCONNECT | step_footprints:TAG_TC2030-IDC-NL | J2 |
| 1 | Test_Point_SMD | TestPoint:TestPoint_Pad_D1.0mm | TP3 |
Questions
How big is the STEP PCB?
It measures 15 × 35.1 mm and has 4 copper layers, 4.69 mm thick.
What parts does the STEP use?
59 parts, built around the MLPF-WB55-01E3, PKMCS0909E4000-R1, CL21A475KAQNNNE and DFE201612E-2R2M=P2. 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 STEP KiCad files?
From the OlinSTEP/2023-EE repository on GitHub, at the commit this page was made from: the board is kicad_files/STEP.kicad_pcb and its schematic board_rev2/espboard/espboard.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the STEP design in my own project?
Its repository states no licence, so its author keeps all rights: ask OlinSTEP before reusing the design.
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