# Biological Harlequin Wall-E ## Description USB‑C UFP USB 3.0 to SATA Bridge Using TI TUSB9261 with W25Q80DV Firmware Flash, 25 MHz Oscillator, Ultra‑Low Capacitance USB ESD Protection, and 1 A 5V‑to‑3.3V Buck Regulator ## Project Details - **Owner:** 0xl0r3nz0 - **Created:** 12/3/2025 - **Last Updated:** 12/3/2025 - **Visibility:** Public - **Reference Design URL:** https://www.ti.com/product/TUSB9261 - **Net Type: USB 2.0 D+/D−:** High Speed - **Connectivity:** USB - **Part Type:** Portal - **Net Type: USB 3.x SuperSpeed Pairs:** High Speed - **License:** http://solderpad.org/licenses/SHL-2.1/ - **Power Rail: 5V_VBUS:** Power - **Manufacturing Quantity Target:** 10 - **Net Type: 25 MHz Clock:** Medium Speed - **Power Rail: 3V3:** Power - **Project Architecture:** USB‑C UFP → 5V→3.3V buck → TUSB9261 USB3‑to‑SATA bridge + W25Q80DV SPI flash + 25 MHz oscillator → SATA HDD; ESD protection (<1 pF) on USB2 D+/D− and USB3 SS pairs; CC1/CC2 pull‑downs for UFP role. - **Domain:** Consumer Electronics - **Operating Voltage:** 5V - **Net Type: SPI Flash Bus:** Medium Speed - **Net Type: SATA TX/RX Pairs:** High Speed - **Power Requirements:** USB ## Key Components ### D1 — [Schottky Rectifier Diode](https://www.flux.ai/corynrobinson/schottky-rectifier-diode~zu.md) - Package or Case Code: D_SMA - Current: 3A - Forward Voltage: 450mV - Manufacturer Part Number: SSA33L-E3/61T - Role Details: Reverse current protection from 5V_VBUS to U3 VIN - Breakdown Voltage: 30V - Purchase Url: https://octopart.com/ssa33l-e3%2F61t-vishay-39552932 - Datasheet URL: https://octopart.com/datasheet/ssa33l-e3%2F61t-vishay-39552932 - Part Type: Diode - Role: Reverse Polarity Protection - Manufacturer Name: Vishay **Pins:** - A [pin 2] - K [pin 1] ### D3 — [ESD321DPYR](https://www.flux.ai/corvus96/esd321dpyr~2s.md) - Datasheet URL: https://www.ti.com/lit/ds/symlink/esd321.pdf?HQS=dis-dk-null-digikeymode-dsf-pf-null-wwe&ts=1690491326127&ref_url=https%253A%252F%252Fwww.ti.com%252Fgeneral%252Fdocs%252Fsuppproductinfo.tsp%253FdistId%253D10%2526gotoUrl%253Dhttps%253A%252F%252Fwww.ti.com%252Flit%252Fgpn%252Fesd321 - Manufacturer Name: Texas Instruments - Role: Protection - Manufacturer Part Number: ESD321DPYR - Role Details: ESD protection for USB2 D+/D- pair **Pins:** - GND [pin 2] - IO [pin 1] ### D4 — [WE-TVS-82400102](https://www.flux.ai/kicad-part-library/we-tvs-82400102~vb9.md) - Role Details: ESD protection for USB3 SuperSpeed TX pair - Role: Protection - Datasheet URL: https://www.we-online.com/components/products/datasheet/82400102.pdf - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: WE-TVS-82400102 - Package or Case Code: SOT-23-6 **Pins:** - ~ [pin 1] - ~ [pin 3] - ~ [pin 4] - ~ [pin 5] - ~ [pin 6] - ~ [pin 2] ### D5 — [WE-TVS-82400102](https://www.flux.ai/kicad-part-library/we-tvs-82400102~vb9.md) - Manufacturer Name: Texas Instruments Inc. - Manufacturer Part Number: WE-TVS-82400102 - Package or Case Code: SOT-23-6 - Role: Protection - Datasheet URL: https://www.we-online.com/components/products/datasheet/82400102.pdf - Role Details: ESD protection for USB3 SuperSpeed RX pair **Pins:** - ~ [pin 1] - ~ [pin 3] - ~ [pin 4] - ~ [pin 5] - ~ [pin 6] - ~ [pin 2] ### J1 — [2024100002](https://www.flux.ai/adrian95/2024100002~atk.md) - Role: Connector - Part Type: Connector - Manufacturer Part Number: 2024100002 - Datasheet URL: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/834/202410002_Pkg_Spec.pdf - Role Details: USB-C receptacle for USB 3.0 UFP port - Manufacturer Name: Molex - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - CC1 [pin A5] - CC2 [pin B5] - DA- [pin A7] - DA+ [pin A6] - DB- [pin B7] - DB+ [pin B6] - GND1 [pin A1] - GND2 [pin A12] - GND3 [pin B1] - GND4 [pin B12] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - SHIELD1 [pin SH1] - SHIELD2 [pin SH2] - SHIELD3 [pin SH3] - SHIELD4 [pin SH4] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS1 [pin A4] - VBUS2 [pin A9] - VBUS3 [pin B4] - VBUS4 [pin B9] ### U1 — [TUSB9261IPAPRQ1](https://www.flux.ai/lcsc/tusb9261ipaprq1~gn55.md) - Manufacturer Name: TI(德州仪器) - Part Type: Interface - Specialized - Role Details: USB 3.0 to SATA Bridge - Package: HTQFP-64_L10.0-W10.0-P0.50-LS12.0-BL-EP4.7 - JLCPCB Part Class: Extended Part - LCSC Part Number: C2674187 - Manufacturer Part Number: TUSB9261IPAPRQ1 - Package or Case Code: HTQFP-64_L10.0-W10.0-P0.50-LS12.0-BL-EP4.7 **Pins:** - EP [pin 65] - FREQSEL0 [pin 30] - FREQSEL1 [pin 31] - GPIO0 [pin 8] - GPIO1 [pin 9] - GPIO2 [pin 10] - GPIO3 [pin 11] - GPIO4 [pin 13] - GPIO5 [pin 14] - GPIO6 [pin 15] - GPIO7 [pin 16] - GPIO8/UART_RX [pin 5] - GPIO9/UART_TX [pin 6] - GRSTZ [pin 4] - JTAG_TCK [pin 25] - JTAG_TDI [pin 26] - JTAG_TDO [pin 27] - JTAG_TMS [pin 28] - JTAG_TRSTZ [pin 29] - PWM0 [pin 2] - PWM1 [pin 3] - SATA_RXM [pin 59] - SATA_RXP [pin 60] - SATA_TXM [pin 56] - SATA_TXP [pin 57] - SPI_CS0 [pin 21] - SPI_CS1/GPIO10 [pin 22] - SPI_CS2/GPIO11 [pin 23] - SPI_DATA_IN [pin 20] - SPI_DATA_OUT [pin 18] - SPI_SCLK [pin 17] - USB_DM [pin 35] - USB_DP [pin 36] - USB_R1 [pin 38] - USB_R1RTN [pin 39] - USB_SSRXM [pin 45] - USB_SSRXP [pin 46] - USB_SSTXM [pin 42] - USB_SSTXP [pin 43] - USB_VBUS [pin 50] - VDD [pin 1] - VDD [pin 12] - VDD [pin 19] - VDD [pin 32] - VDD [pin 33] - VDD [pin 41] - VDD [pin 47] - VDD [pin 49] - VDD [pin 55] - VDD [pin 61] - VDD [pin 63] - VDD33 [pin 7] - VDD33 [pin 24] - VDD33 [pin 51] - VDDA33 [pin 34] - VDDA33 [pin 40] - VDDA33 [pin 48] - VDDA33 [pin 62] - VSS [pin 37] - VSS [pin 44] - VSS [pin 58] - VSS [pin 64] - VSSOSC [pin 53] - XI [pin 52] - XO [pin 54] ### U2 — [W25Q80DVSNIG](https://www.flux.ai/lcsc/w25q80dvsnig~8cyd.md) - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Manufacturer Name: WINBOND(华邦) - JLCPCB Part Class: Extended Part - Package: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Part Type: NOR FLASH - Manufacturer Part Number: W25Q80DVSNIG - Role: Firmware Flash - Role Details: SPI Flash for firmware storage. - Product Info Url: https://lcsc.com/product-detail/Others_Winbond-Elec-W25Q80DVSNIG_C115408.html - LCSC Part Number: C115408 - Datasheet URL: https://lcsc.com/product-detail/Others_Winbond-Elec-W25Q80DVSNIG_C115408.html **Pins:** - /CS [pin 1] - /HOLD(IO3) [pin 7] - /WP(IO2) [pin 3] - CLK [pin 6] - DI(IO0) [pin 5] - DO(IO1) [pin 2] - GND [pin 4] - VCC [pin 8] ### U3 — [TPS62840DLCR](https://www.flux.ai/lcsc/tps62840dlcr~fpxf.md) - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TPS62840DLCR - Package or Case Code: VSON-8_L2.0-W1.5-P0.50-BL - Role: Power Conversion - Role Details: 5 V to 3.3 V buck regulator, 1 A output - LCSC Part Number: C2071859 - Part Type: DC-DC Converters - Package: VSON-8_L2.0-W1.5-P0.50-BL - Manufacturer Name: TI(德州仪器) **Pins:** - EN [pin 4] - GND [pin 1] - MODE [pin 3] - STOP [pin 6] - SW [pin 7] - VIN [pin 2] - VOS [pin 8] - VSET [pin 5] ### X1 — [OVETGLJANF-25MHZ](https://www.flux.ai/lcsc/ovetgljanf-25mhz~r03q.md) - Part Type: Oscillators - Manufacturer Part Number: OVETGLJANF-25MHZ - Manufacturer Name: TAITIEN(泰艺电子) - Role Details: Reference clock for TI TUSB9261 - JLCPCB Part Class: Extended Part - Package or Case Code: OSC-SMD_4P-L5.0-W3.2-BL_SIT1602AI - Role: Oscillator - Product Info Url: https://lcsc.com/product-detail/Others_TAITIEN-Elec-SMD-5032-4P_C242213.html - Frequency: 25000000Hz - LCSC Part Number: C242213 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811052140_TAITIEN-Elec-OVETGLJANF-25MHZ_C242213.pdf **Pins:** - GND [pin 2] - OUT [pin 3] - TS [pin 1] - VCC [pin 4] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/0xl0r3nz0/biological-harlequin-wall-e~dl](https://www.flux.ai/0xl0r3nz0/biological-harlequin-wall-e~dl).* --- *Generated from [https://www.flux.ai/0xl0r3nz0/biological-harlequin-wall-e~dl](https://www.flux.ai/0xl0r3nz0/biological-harlequin-wall-e~dl)*