# ESP32-S2-MINI-1U Reference Design ## Description This project is a reference design for an ESP32-S2-MINI-1U based device. It features USB-C for power and data transfer, onboard voltage regulation, and multiple peripheral connections. It also includes a CH340C for USB to serial conversion #referenceDesign #project #ESP32 #ESP32S2 #RF #WIFI #MCU #referenceDesign #simple-embedded #espressif #template #reference-design ## Project Details - **Owner:** abhishek04 - **Created:** 7/19/2024 - **Last Updated:** 7/29/2024 - **Visibility:** Public - **License:** https://creativecommons.org/licenses/by/4.0/ - **Copies:** 1 ## Key Components ### BATT1 — [1070TR](https://www.flux.ai/jharwinbarrozo/1070tr~eit.md) - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/userAssets/file/M65p5.pdf - Manufacturer Part Number: 1070TR - Voltage: 3V **Pins:** - - - + ### BATT2 — [1070TR](https://www.flux.ai/jharwinbarrozo/1070tr~eit.md) - Manufacturer Part Number: 1070TR - Voltage: 3V - Manufacturer Name: Keystone Electronics - Datasheet URL: https://www.keyelco.com/userAssets/file/M65p5.pdf **Pins:** - - - + ### BOOT — [PTS815](https://www.flux.ai/vasy_skral/pts815~6b.md) - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Manufacturer Name: C&K - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### D1 — [1N5819HW-7-F](https://www.flux.ai/jecstronic/1n5819hw-7-f~x5v.md) - Datasheet URL: https://www.diodes.com/assets/Datasheets/ds30217.pdf - Manufacturer Name: Diodes Incorporated - Manufacturer Part Number: 1N5819HW-7-F - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Diode **Pins:** - A [pin 2] - K [pin 1] ### D2 — [WE-TVS-82400102](https://www.flux.ai/vasy_skral/we-tvs-82400102~xt.md) - Manufacturer Name: Würth Elektronik - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://katalog.we-online.de/pbs/datasheet/82400102.pdf - Manufacturer Part Number: 82400102 - Part Type: Protection **Pins:** - GND [pin 2] - IO1 [pin 6] - IO1 [pin 1] - IO2 [pin 4] - IO2 [pin 3] - VDD [pin 5] ### D4 — [1A Rectifier Diode](https://www.flux.ai/corynrobinson/1a-rectifier-diode~j2.md) - Max Reverse Voltage: 600V - Package or Case Code: D_SMA - Current: 1A - Manufacturer Name: Vishay - Purchase Url: https://octopart.com/s1j-e3%2F61t-vishay-39552151#CadModels - Capacitance: 12pF - Forward Voltage: 1.1V - Datasheet URL: https://datasheet.octopart.com/S1J-E3-61T-Vishay-datasheet-10950683.pdf - Part Type: Diode - Manufacturer Part Number: S1J-E3_61T **Pins:** - ANODE [pin 2] - CATHODE [pin 1] ### D5 — [Schottky Diode](https://www.flux.ai/corynrobinson/schottky-diode~hs.md) - Manufacturer Name: onsemi - Purchase Url: https://octopart.com/mbr0520lt1g-onsemi-2933?r=sp - Datasheet URL: https://www.onsemi.com/pdf/datasheet/mbr0520lt1-d.pdf - Package or Case Code: D_SOD-123 - Breakdown Voltage: 20V - Part Type: Diode - Current: 0.5A - Manufacturer Part Number: MBR0520LT1G **Pins:** - A - K ### D6 — [BZV55-C5V1,115](https://www.flux.ai/jecstronic/bzv55-c5v1115~tfb.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://rocelec.widen.net/view/pdf/mmjrjopmpw/PHGLS22257-1.pdf?t.download=true&u=5oefqw - Manufacturer Part Number: BZV55-C5V1,115 - Manufacturer Name: Nexperia USA Inc. - Part Type: Diode **Pins:** - A [pin 2] - K [pin 1] ### IC1 — [CH340C](https://www.flux.ai/vasyl/ch340c~qf3.md) - Manufacturer Name: Wah - Datasheet URL: https://datasheet.lcsc.com/szlcsc/Jiangsu-Qin-Heng-CH340C_C84681.pdf - Part Type: Integrated Circuit - Manufacturer Part Number: CH340C **Pins:** - ~CTS [pin 9] - ~DCD [pin 12] - ~DSR [pin 10] - ~DTR [pin 13] - ~RI [pin 11] - ~RTS [pin 14] - GND [pin 1] - NC [pin 7] - NC [pin 8] - R232 [pin 15] - RXD [pin 3] - TXD [pin 2] - UD- [pin 6] - UD+ [pin 5] - V3 [pin 4] - VCC [pin 16] ### J1 — [Pin Header 01x21 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x21-2p54mm-vertical~qda.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_14 [pin 14] - Pin_15 [pin 15] - Pin_16 [pin 16] - Pin_17 [pin 17] - Pin_18 [pin 18] - Pin_19 [pin 19] - Pin_2 [pin 2] - Pin_20 [pin 20] - Pin_21 [pin 21] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### J2 — [Pin Header 01x21 2.54mm Vertical](https://www.flux.ai/vasy_skral/pin-header-01x21-2p54mm-vertical~qda.md) - Part Type: Connector - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - Pin_1 [pin 1] - Pin_10 [pin 10] - Pin_11 [pin 11] - Pin_12 [pin 12] - Pin_13 [pin 13] - Pin_14 [pin 14] - Pin_15 [pin 15] - Pin_16 [pin 16] - Pin_17 [pin 17] - Pin_18 [pin 18] - Pin_19 [pin 19] - Pin_2 [pin 2] - Pin_20 [pin 20] - Pin_21 [pin 21] - Pin_3 [pin 3] - Pin_4 [pin 4] - Pin_5 [pin 5] - Pin_6 [pin 6] - Pin_7 [pin 7] - Pin_8 [pin 8] - Pin_9 [pin 9] ### LED2 — [0603 Orange LED](https://www.flux.ai/corynrobinson/0603-orange-led~sq.md) - Manufacturer Part Number: APT1608SECK - Part Type: LED - Current: 20mA - Forward Voltage: 2.1V - Manufacturer Name: Kingbright - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/APT1608SECK.pdf **Pins:** - A [pin 2] - K [pin 1] ### LED3 — [WP7113SYD](https://www.flux.ai/jecstronic/wp7113syd~1kv.md) - Forward Voltage: 2V - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Kingbright - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP7113SYD.pdf - Part Type: LED - Manufacturer Part Number: WP7113SYD **Pins:** - A [pin 2] - K [pin 1] ### LED4 — [WP710A10SGD](https://www.flux.ai/jecstronic/wp710a10sgd~ljj.md) - Part Type: LED - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Kingbright - Manufacturer Part Number: WP710A10SGD - Datasheet URL: https://www.kingbrightusa.com/images/catalog/SPEC/WP710A10SGD.pdf **Pins:** - A [pin 2] - K [pin 1] ### LED5 — [Red Right Angle LED](https://www.flux.ai/corynrobinson/red-right-angle-led~68.md) - Forward Voltage: 2V - Part Type: LED - Manufacturer Part Number: 155301RS73100 - Datasheet URL: https://www.we-online.com/catalog/datasheet/155301RS73100.pdf - Manufacturer Name: Wurth Electronics - Current: 20mA **Pins:** - A - K ### PWR — [LED-0805-Template-2](https://www.flux.ai/vasy_skral/led-0805-template-2~uu0.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: LED **Pins:** - A [pin 2] - K [pin 1] ### Q1 — BSS138 - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Part Type: Transistor - Manufacturer Name: onsemi - Manufacturer Part Number: BSS138 **Pins:** - D - G - S ### Q2 — BSS138 - Part Type: Transistor - Manufacturer Name: onsemi - Datasheet URL: https://www.onsemi.com/pdf/datasheet/bss138-d.pdf - Manufacturer Part Number: BSS138 **Pins:** - D - G - S ### Q3 — [2N3904](https://www.flux.ai/adrian95/2n3904~a6d.md) - Manufacturer Name: NTE Electronics, Inc - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 2N3904 - Datasheet URL: https://www.nteinc.com/specs/original/2N3904.pdf **Pins:** - B [pin 2] - C [pin 3] - E [pin 1] ### Q4 — [IRFZ44NPBF](https://www.flux.ai/adrian95/irfz44npbf~v2h.md) - Manufacturer Part Number: IRFZ44NPBF - Part Type: Transistor - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Infineon Technologies - Datasheet URL: https://www.infineon.com/dgdl/irfz44npbf.pdf?fileId=5546d462533600a40153563b3a9f220d **Pins:** - D [pin 2] - G [pin 1] - S [pin 3] ### RST — [PTS815](https://www.flux.ai/vasy_skral/pts815~6b.md) - Manufacturer Part Number: PTS815 SJM 250 SMTR LFS - Manufacturer Name: C&K - Part Type: Switch - Datasheet URL: https://www.ckswitches.com/media/2728/pts815.pdf **Pins:** - ~1 [pin 1] - ~2 [pin 2] - ~3 [pin 3] - ~4 [pin 4] ### SW1 — [TS-1088R-02026](https://www.flux.ai/jecstronic/ts-1088r-02026~fo.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_XUNPU-TS-1088R-02026_C455280.pdf - Part Type: Switch - Manufacturer Part Number: TS-1088R-02026 - Manufacturer Name: XUNPU **Pins:** - P1 [pin 1] - P2 [pin 2] ### U1 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021917_Advanced-Monolithic-Systems-AMS1117_C6188.pdf - Manufacturer Part Number: AMS1117-3.3 - Manufacturer Name: AMS - Part Type: Integrated Circuit **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U2 — [AMS1117-3.3](https://www.flux.ai/vasy_skral/ams1117-33~34.md) - Datasheet URL: https://datasheet.lcsc.com/lcsc/1811021917_Advanced-Monolithic-Systems-AMS1117_C6188.pdf - Part Type: Integrated Circuit - Manufacturer Part Number: AMS1117-3.3 - Manufacturer Name: AMS **Pins:** - GND [pin 1] - TAB(VOUT) [pin 4] - VIN [pin 3] - VOUT [pin 2] ### U3 — [LM7805CT/NOPB](https://www.flux.ai/adrian95/lm7805ctnopb~wo3.md) - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: LM7805CT/NOPB - Datasheet URL: https://www.ti.com/lit/ds/symlink/lm340.pdf - Manufacturer Name: Texas Instruments - Part Type: Integrated Circuit **Pins:** - GND [pin 2] - VI [pin 1] - VO [pin 3] ### U4 — [L293D](https://www.flux.ai/vasy_skral/l293d~9wp.md) - Manufacturer Name: STMicroelectronics - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/04/ac/22/f9/20/5d/43/a1/CD00000059.pdf/files/CD00000059.pdf/jcr:content/translations/en.CD00000059.pdf - Manufacturer Part Number: L293D - Part Type: Integrated Circuit **Pins:** - 1A [pin 2] - 1Y [pin 3] - 2A [pin 7] - 2Y [pin 6] - 3A [pin 10] - 3Y [pin 11] - 4A [pin 15] - 4Y [pin 14] - EN1,2 [pin 1] - EN3,4 [pin 9] - GND [pin 5] - GND [pin 12] - GND [pin 4] - GND [pin 13] - VCC1 [pin 16] - VCC2 [pin 8] ### U6 — [NE555N](https://www.flux.ai/jecstronic/ne555n~37i.md) - Manufacturer Name: STMicroelectronics - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.st.com/content/ccc/resource/technical/document/datasheet/ba/0a/d7/6e/7c/db/4e/12/CD00000479.pdf/files/CD00000479.pdf/jcr:content/translations/en.CD00000479.pdf - Part Type: Integrated Circuit - Manufacturer Part Number: NE555N **Pins:** - Control_Voltage [pin 5] - Discharge [pin 7] - GND [pin 1] - Output [pin 3] - Reset [pin 4] - Threshold [pin 6] - Trigger [pin 2] - VCC [pin 8] ### USB1 — [TYPE-C-31-M-12](https://www.flux.ai/vasy_skral/type-c-31-m-12~75f.md) - Manufacturer Part Number: TYPE-C-31-M-12 - Manufacturer Name: Korean Hroparts Elec - Part Type: Connector - Datasheet URL: https://datasheet.lcsc.com/lcsc/2205251630_Korean-Hroparts-Elec-TYPE-C-31-M-12_C165948.pdf **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DN1 [pin A7] - DN2 [pin B7] - DP1 [pin A6] - DP2 [pin B6] - GND [pin B1A12] - GND [pin A1B12] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD [pin S3] - SHIELD [pin S1] - SHIELD [pin S4] - SHIELD [pin S2] - VBUS [pin A4B9] - VBUS [pin B4A9] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/abhishek04/esp32-s2-mini-1u-reference-design~ze](https://www.flux.ai/abhishek04/esp32-s2-mini-1u-reference-design~ze).* --- *Generated from [https://www.flux.ai/abhishek04/esp32-s2-mini-1u-reference-design~ze](https://www.flux.ai/abhishek04/esp32-s2-mini-1u-reference-design~ze)*