2 layers100 × 100 mm
4 layers72 × 47 mm
YMZ771
Tert2/YMZ771- Size
- 72 × 47 mm
- Copper layers
- 4
- Thickness
- 1.6 mm
- Parts
- 126
- Nets
- 233
- Pads
- 818
- Tracks, vias
- 590, 143
- Pours
- 3
- Routed
- Yes
- KiCad
- KiCad 10.0 (file 20260206)
- Created
- 12 Apr 2025
- Updated
- 28 May 2026
Overview
YMZ771 is an open-source printed circuit board by Tert2, from the Tert2/YMZ771 repository on GitHub. It is a 4-layer board of 72 × 47 mm with 126 parts on 233 nets, routed with 590 tracks and 143 vias.
It is built around the ATMEGA4809-AF, 74AHC541D and ESP32-S3-WROOM-1-N8, with the CH340K, TXS0104EPW and 74HC595 among its other parts. Its parts include 33 capacitors, 25 resistors, 19 diodes, 15 ICs and 8 connectors. It belongs with the ESP32 and AVR (ATmega, ATtiny) boards of this library.
Main components
8
ATMEGA4809-AF
TQFP-48(7x7)-40℃~+125℃ 1.8V~5.5V 10bit 20MHz 256Byte 41 48KB 6KB 8 Bit AVR Built-in FLASH TQFP-48(7x7) Microcontrollers (MCU/MPU/SOC) ROHSMicrochip TechnologyMicrocontrollers (MCU/MPU/SOC)
74AHC541D
SO-20-300mil-40℃~+125℃ 1 2V~5.5V 74AHC 8 80uA 8mA 8mA 9ns@5.5V,50pF Schmitt trigger Tri-State Unidirectional SO-20-300mil Buffers, Drivers, Receivers, Transceivers ROHSNexperiaBuffer/Driver/Transceiver
ESP32-S3-WROOM-1-N8
SMD,25.5x18mm-40℃~+85℃ -98.2dBm 2.4GHz 20.5dBm 355mA 3V~3.6V 95mA Bluetooth5.0 ESP32-S3 Chip On-board PCB Antenna UART、SPI、I2C、I2S、USB SMD,25.5x18mm WiFi Modules ROHSEspressif SystemsWiFi Modules
CH340K
ESSOP-10-150mil-1mm-20℃~+70℃ 2Mbps 3.3V、5V USB 2.0 USB to serial ESSOP-10-150mil-1mm USB Converters ROHSWCH (Nanjing Qinheng Microelectronics)USB Converters
TXS0104EPW
TSSOP-14-40℃~+85℃ 1 1.65V~3.6V 2.3V~5.5V 24Mbps 4 Automatic direction detection、Output enable high-impedance、Integrated pull-up resistor Bidirectional Level translator Push-Pull、Open-drain TSSOP-14 Translators, Level Shifters ROHSTexas InstrumentsTranslators, Level Shifters
74HC595
SOP-16-40℃~+85℃ 1 100ns@5V,50pF 10MHz 2V~6V 74HC 8 Serial-to-Serial or Parallel Tri-State SOP-16 Shift Registers ROHSGRShift Registers
PCM5102APW
TSSOP-20-25℃~+85℃ 1.8V~3.3V 2 32 384kHz 500uA 50MHz Audio Decoder Digital filtering、Power-down mode I2S TSSOP-20 ADCs/DACs - Special Purpose ROHSTexas InstrumentsADCs/DACs - Special Purpose
TS5A23159DGSR
VSSOP-10-0.5mm-40℃~+85℃ 1.1Ω 1.65V~5.5V 100MHz 15ns 2 20ns 2:1 VSSOP-10-0.5mm Analog Switches, Multiplexers ROHSTexas InstrumentsAnalog Switches, Multiplexers
Parts
126| Qty | Value | Footprint | References |
|---|---|---|---|
| 18 | LED_Small | LED_SMD:LED_0603_1608Metric_Pad1.05x0.95mm_HandSolder | D2, D3, D4, D5, D6, D7, D10, D11, D12, D13, D14, D15, D16, D17, D18, D19 +2 |
| 14 | R_Pack04 | Yamaha:MNR04M0ABJ | RN1, RN2, RN3, RN4, RN5, RN6, RN7, RN8, RN9, RN10, RN11, RN12, RN13, RN14 |
| 8 | 10k | Resistor_SMD:R_0603_1608Metric | R5, R11, R17, R18, R19, R20, R55, R56 |
| 8 | C_Small | Capacitor_SMD:C_0603_1608Metric | C23, C24, C25, C27, C28, C31, C32, C35 |
| 8 | R_Small | Resistor_SMD:R_0603_1608Metric | R6, R7, R8, R10, R13, R14, R15, R16 |
| 6 | 0.1uF | Capacitor_SMD:C_0603_1608Metric | C2, C3, C10, C11, C12, C13 |
| 4 | 0.1u | Capacitor_SMD:C_0603_1608Metric | C5, C6, C18, C21 |
| 4 | 47u | Capacitor_SMD:C_0603_1608Metric | C8, C9, C19, C22 |
| 4 | NMOS | Package_TO_SOT_SMD:SOT-23 | Q1, Q2, Q3, Q4 |
| 3 | 20n | Capacitor_SMD:C_0603_1608Metric_Pad1.08x0.95mm_HandSolder | C26, C29, C30 |
| 3 | 5k1 | Resistor_SMD:R_0603_1608Metric | R1, R3, R4 |
| 2 | 100k | Resistor_SMD:R_0603_1608Metric_Pad0.98x0.95mm_HandSolder | R37, R57 |
| 2 | 10uF | Capacitor_SMD:C_1812_4532Metric | C33, C34 |
| 2 | 2.2nF | Capacitor_SMD:C_0603_1608Metric | C14, C15 |
| 2 | 2.2uF | Capacitor_SMD:C_0603_1608Metric | C16, C20 |
| 2 | 470 | Resistor_SMD:R_0603_1608Metric | R9, R12 |
| 2 | 74AHC541 | Package_SO:SSOP-20_5.3x7.2mm_P0.65mm | U11, U12 |
| 2 | TXS0104EPW | Package_SO:TSSOP-14_4.4x5mm_P0.65mm | U2, U5 |
| 2 | ~ | Package_DIP:DIP-8_W7.62mm | U13, U14 |
| 1 | 0u1 | Capacitor_SMD:C_0603_1608Metric | C7 |
| 1 | 16.384MHz | Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm | Y1 |
| 1 | 1M | Resistor_SMD:R_0603_1608Metric | R51 |
| 1 | 20k | Resistor_SMD:R_0603_1608Metric | R2 |
| 1 | 4u7 | Capacitor_SMD:C_0603_1608Metric | C17 |
| 1 | 74HC595 | Package_SO:TSSOP-16_4.4x5mm_P0.65mm | U7 |
| 1 | ATmega4809-A | Package_QFP:TQFP-48_7x7mm_P0.5mm | U9 |
| 1 | CH340K | Package_SO:SSOP-10-1EP_3.9x4.9mm_P1mm_EP2.1x3.3mm | U4 |
| 1 | Conn_01x02_Pin | Connector_PinHeader_2.54mm:PinHeader_1x02_P2.54mm_Vertical | J8 |
| 1 | Conn_02x06_Counter_Clockwise | Connector_PinHeader_1.27mm:PinHeader_2x06_P1.27mm_Vertical_SMD | J9 |
| 1 | Conn_02x08_Counter_Clockwise | Connector_PinHeader_1.27mm:PinHeader_2x08_P1.27mm_Vertical_SMD | J10 |
| 1 | Conn_02x12_Counter_Clockwise | Connector_PinHeader_1.27mm:PinHeader_2x12_P1.27mm_Vertical_SMD | J11 |
| 1 | ESP32-S3-WROOM-1 | RF_Module:ESP32-S3-WROOM-1 | U10 |
| 1 | LED | LED_SMD:LED_0603_1608Metric | D1 |
| 1 | MJ-8435 | YMZ771:MJ-8435 | J4 |
| 1 | Micro_SD_Card_Det2 | Connector_Card:microSD_HC_Hirose_DM3AT-SF-PEJM5 | J2 |
| 1 | PCM5102A | Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm | U8 |
| 1 | RotaryEncoder | Rotary_Encoder:RotaryEncoder_Bourns_Horizontal_PEC09-2xxxF-Nxxxx | SW2 |
| 1 | SW_MEC_5E | Yamaha:SW_SKRPABE010 | SW3 |
| 1 | SW_Push | footprints:SKRPABE010 | SW1 |
| 1 | TS5A23159DGS | Package_SO:VSSOP-10_3x3mm_P0.5mm | U1 |
| 1 | USB_C_Receptacle_USB2.0_16P | Connector_USB:USB_C_Receptacle_GCT_USB4105-xx-A_16P_TopMnt_Horizontal | J7 |
| 1 | YMZ771-F | Yamaha:QFP80P1880X2480X295-80N | J1 |
| 1 | ~ | Package_TO_SOT_SMD:TSOT-23-5_HandSoldering | U3 |
| 1 | ~ | YMZ771:OSL2051A-LR | U6 |
| 1 | ~ | YMZ771:YMZ771-F | U10 |
The 122 most common of 126 parts.
Questions
How big is the YMZ771 PCB?
It measures 72 × 47 mm and has 4 copper layers, 1.6 mm thick.
What parts does the YMZ771 use?
126 parts, built around the ATMEGA4809-AF, 74AHC541D, ESP32-S3-WROOM-1-N8 and CH340K. 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 YMZ771 KiCad files?
From the Tert2/YMZ771 repository on GitHub, at the commit this page was made from: the board is ymz771/ymz771.kicad_pcb and its schematic ymz771/ymz771.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the YMZ771 design in my own project?
Its repository states no licence, so its author keeps all rights: ask Tert2 before reusing the design.
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