2 layers33 × 32.5 mm
2 layers75.7 × 53.7 mm
TSSI v2.1
SDM-EV/EV-PCB-Dev3- Size
- 75.7 × 53.7 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 49
- Nets
- 59
- Pads
- 192
- Tracks, vias
- 483, 97
- Pours
- 1
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 4 Oct 2025
- Updated
- 24 Oct 2026
Overview
TSSI v2.1 is an open-source printed circuit board by SDM-EV, from the SDM-EV/EV-PCB-Dev repository on GitHub. It is a 2-layer board of 75.7 × 53.7 mm with 49 parts on 59 nets, routed with 483 tracks and 97 vias.
It is built around the ESP32-S3-WROOM-1-N8R8, AO3400A and MIC37100-3.3WS, with the USBLC6-2SC6, LTV-817S-TA1 and SMCJ28CA among its other parts. Its parts include 14 capacitors, 12 resistors, 7 ICs, 3 diodes and 3 transistors. It belongs with the ESP32 boards of this library.
Main components
8
ESP32-S3-WROOM-1-N8R8
SMD,25.5x18mm-104.5dBm -40℃~+65℃ 2.4GHz 20.5dBm 330mA 3V~3.6V 97mA Bluetooth5.0 ESP32-S3R8 On-board PCB Antenna UART、SPI、I2C、GPIO、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
AO3400A
SOT-23-55℃~+150℃ 1 N-channel 1.45V 1.4W 30V 48mΩ@2.5V 5.7A 50pF 630pF 75pF 7nC@10V N-Channel SOT-23 MOSFETs ROHSAlpha & Omega SemiconductorMOSFETs
MIC37100-3.3WS
SOT-223-40℃~+125℃@(Tj) 1 11mA 1A 3.3V 500mV@(1A) 6V Fixed Over Current Protection、Over Temperature Protection Positive SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSMicrochip TechnologyVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
USBLC6-2SC6
SOT-23-60.35pF、0.8pF 100nA 150W@8/20us 15V 2 5V 6A@8/20us 6V ESD SOT-23-6 ESD and Surge Protection (TVS/ESD) ROHSUMWESD And Surge Protection (TVS/ESD)
LTV-817S-TA1
SMD-4P-55℃~+110℃ 1 1.2V 100mV@20mA,1mA 200mW 35V 3us 4us 50% 50mA 50mA 5kV 600% 6V DC Phototransistor SMD-4P Transistor, Photovoltaic Output Optoisolators ROHSLite-OnTransistor, Photovoltaic Output Optoisolators
SMCJ28CA
SMC(DO-214AB)ESD And Surge Protection (TVS/ESD)hongjiacheng
SS14
SMA(DO-214AC)-55℃~+150℃ 1A 25A 300uA@40V 40V 550mV@1A Independent SMA(DO-214AC) Schottky Diodes ROHSMDDSchottky Diodes
SSQ-103-03-G-D
插件,P=2.54mm-55℃~+125℃ 2 2.54mm 2.54mm 6P 8.51mm Gold Through Hole 插件,P=2.54mm Female Headers ROHSSamtecFemale Headers
Parts
49| Qty | Value | Footprint | References |
|---|---|---|---|
| 7 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C3, C5, C6, C7, C12, C13, C14 |
| 5 | 10k | Resistor_SMD:R_0603_1608Metric | R3, R4, R9, R10, R12 |
| 4 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1, H2, H3, H4 |
| 3 | LTV-817S-TA1 | TSSIFootprintLibrary:LTV-817S_LTO | Q1, Q2, Q3 |
| 2 | 100K | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R5, R6 |
| 2 | 100R | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R7, R8 |
| 2 | 10uF | Capacitor_SMD:C_0603_1608Metric | C10, C11 |
| 2 | 2425753-1 | TSSIFootprintLibrary:24257531 | S1, S2 |
| 2 | 27 | Resistor_SMD:R_0603_1608Metric | R1, R2 |
| 2 | AO3400A | TSSIFootprintLibrary:SOT-23-3L_AOS | U5, U6 |
| 2 | C | Capacitor_SMD:C_0603_1608Metric | C1, C2 |
| 1 | 100uF | TSSIFootprintLibrary:WCAP-ASLI_6.3X7.7_DXL_ | C8 |
| 1 | 220 | Resistor_SMD:R_0603_1608Metric | R11 |
| 1 | 22uF | Capacitor_SMD:C_0603_1608Metric | C4 |
| 1 | 330uF | Capacitor_SMD:CP_Elec_10x10 | C9 |
| 1 | 330uH | TSSIFootprintLibrary:IND_SPD127R_API | L1 |
| 1 | 776267-1 | TSSIFootprintLibrary:CONN14_776267_TEC | J1 |
| 1 | ESP32-S3-WROOM-1-N8R8 | TSSIFootprintLibrary:XCVR_ESP32S3WROOM1N8R8 | IC2 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D2 |
| 1 | LM2575HVS-5.0_NOPB | TSSIFootprintLibrary:VREG_LM2575HVS-5.0_NOPB | U1 |
| 1 | MIC37100-3.3WS | Package_TO_SOT_SMD:SOT-223 | IC1 |
| 1 | SMCJ28CA | TSSIFootprintLibrary:SMCJSeries_LTF | D3 |
| 1 | SS14 | Diode_SMD:D_SMA | D1 |
| 1 | SSQ-103-03-G-D | TSSIFootprintLibrary:SSQ-103-XX-YYY-D | J4 |
| 1 | TPS3702 | Package_TO_SOT_SMD:SOT-23-6 | U4 |
| 1 | USBLC6-2SC6 | Package_TO_SOT_SMD:SOT-23-6 | U3 |
| 1 | USB_B_Micro | Connector_USB:USB_Micro-B_Molex-105017-0001 | J3 |
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Questions
How big is the TSSI v2.1 PCB?
It measures 75.7 × 53.7 mm and has 2 copper layers, 1.6 mm thick.
What parts does the TSSI v2.1 use?
49 parts, built around the ESP32-S3-WROOM-1-N8R8, AO3400A, MIC37100-3.3WS and USBLC6-2SC6. 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 TSSI v2.1 KiCad files?
From the SDM-EV/EV-PCB-Dev repository on GitHub, at the commit this page was made from: the board is sdm27ev/sdm27ev-tssi/TSSI_v2.1.kicad_pcb and its schematic sdm27ev/sdm27ev-bms-temp-board/BMS_Temp_Board_V1.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the TSSI v2.1 design in my own project?
Its repository states no licence, so its author keeps all rights: ask SDM-EV before reusing the design.