# USB4 NVMe SSD Enclosure ## Description USB4 external NVMe SSD enclosure PCB targeting an ASM2464PDX-class USB4 40 Gbps device controller with PCIe Gen4 x4 downstream M.2 NVMe interface, USB-C upstream port, power management, ESD protection, and controlled-impedance layout constraints. ## Project Details - **Owner:** jonathanmckinney - **Created:** 6/20/2026 - **Last Updated:** 7/8/2026 - **Visibility:** Public - **Domain:** Consumer Electronics - **Implementation Details:** USB4 40 Gbps NVMe enclosure with USB-C PD input, protected VBUS, 3.3 V SSD rail, 1.05 V/1.9 V controller rails, and controlled-impedance layout requirements. - **Power Requirements:** USB - **Connectivity:** USB - **Operating Voltage:** 5V - **Connectivity:** Bluetooth ## Key Components ### D1 — [SS14](https://www.flux.ai/jecstronic/ss14~ri4.md) - Role: Bootstrapping - Manufacturer Name: Slkor(SLKORMICRO Elec.) - Part Type: Diode - Manufacturer Part Number: SS14 - Datasheet URL: https://datasheet.lcsc.com/lcsc/1912111437_Slkor-SLKORMICRO-Elec--SS14_C444721.pdf **Pins:** - Anode - Cathode ### D10 — [ESD224DQA](https://www.flux.ai/kicad-part-library/esd224dqa~nw.md) - Role: Protection - Datasheet URL: https://www.ti.com/lit/ds/symlink/esd224.pdf - Manufacturer Part Number: ESD224DQA - Package or Case Code: Diodes_UDFN-10_1.0x2.5mm_P0.5mm - Manufacturer Name: Texas Instruments Inc. **Pins:** - ~ [pin 7] - ~ [pin 9] - ~ [pin 4] - ~ [pin 2] - ~ [pin 5] - ~ [pin 6] - ~ [pin 1] - ~ [pin 10] - VSS [pin 8] - VSS [pin 3] ### D11 — [USBLC6-2SC6](https://www.flux.ai/lcsc/usblc6-2sc6~2e9x.md) - Peak Pulse Current: 5A - Power: 150W - Operating Temperature: -55°C ~ 125°C (TJ) - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.8-BL - LCSC Part Number: C2687116 - Role: Protection - JLCPCB Part Class: Extended Part - Symbol Style: parametric-v1 - Manufacturer Part Number: USBLC6-2SC6 - Maximum Clamping Voltage: 17V - Manufacturer Name: UMW(友台半导体) - Breakdown Voltage: 6V - Part Type: ESD Protection Devices - Datasheet URL: https://www.lcsc.com/datasheet/C2687116.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=FlkNBAIDRQULVABfFAVZBgZVFVZYBgZSQ1NeBVIFQlExVlNRTlhdUVdURFlXXzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D **Pins:** - GND [pin 2] - I/O1 [pin 1] - I/O1 [pin 6] - I/O2 [pin 3] - I/O2 [pin 4] - VBUS [pin 5] ### D2 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Role: Protection - LCSC Part Number: C1976014 - Part Type: TVS - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TPD1E0B04DPYT - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - Manufacturer Name: TI(德州仪器) **Pins:** - 1 [pin 1] - 2 [pin 2] ### D3 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Role: Protection - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: TPD1E0B04DPYT - Part Type: TVS - JLCPCB Part Class: Extended Part - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - LCSC Part Number: C1976014 **Pins:** - 1 [pin 1] - 2 [pin 2] ### D4 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - LCSC Part Number: C1976014 - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Role: Protection - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TPD1E0B04DPYT - Part Type: TVS - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - Manufacturer Name: TI(德州仪器) **Pins:** - 1 [pin 1] - 2 [pin 2] ### D5 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - LCSC Part Number: C1976014 - Role: Protection - JLCPCB Part Class: Extended Part - Manufacturer Part Number: TPD1E0B04DPYT - Part Type: TVS - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - Manufacturer Name: TI(德州仪器) **Pins:** - 1 [pin 1] - 2 [pin 2] ### D6 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Manufacturer Name: TI(德州仪器) - Role: Protection - Part Type: TVS - Manufacturer Part Number: TPD1E0B04DPYT - JLCPCB Part Class: Extended Part - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - LCSC Part Number: C1976014 **Pins:** - 1 [pin 1] - 2 [pin 2] ### D7 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - Manufacturer Name: TI(德州仪器) - Role: Protection - Part Type: TVS - JLCPCB Part Class: Extended Part - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Manufacturer Part Number: TPD1E0B04DPYT - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - LCSC Part Number: C1976014 **Pins:** - 1 [pin 1] - 2 [pin 2] ### D8 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - LCSC Part Number: C1976014 - Role: Protection - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Part Type: TVS - Manufacturer Part Number: TPD1E0B04DPYT - JLCPCB Part Class: Extended Part - Manufacturer Name: TI(德州仪器) **Pins:** - 1 [pin 1] - 2 [pin 2] ### D9 — [TPD1E0B04DPYT](https://www.flux.ai/lcsc/tpd1e0b04dpyt~hw4.md) - Role: Protection - Package or Case Code: X1SON-2_L1.0-W0.6-P0.65-BI - Manufacturer Part Number: TPD1E0B04DPYT - JLCPCB Part Class: Extended Part - Part Type: TVS - LCSC Part Number: C1976014 - Role Details: One per USB4 high-speed conductor; S-parameter/channel validation required. - Manufacturer Name: TI(德州仪器) **Pins:** - 1 [pin 1] - 2 [pin 2] ### J2 — [MDT420M01501](https://www.flux.ai/adrian95/mdt420m01501~m5m.md) - Manufacturer Name: Amphenol Communications Solutions - Mount: Standard - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connectors - Connector Type: Card Edge Connectors - Manufacturer Part Number: MDT420M01501 - Datasheet URL: https://cdn.amphenol-cs.com/media/wysiwyg/files/drawing/cmdt420x01501.pdf **Pins:** - GND_1 [pin 3] - GND_10 [pin 57] - GND_2 [pin 9] - GND_3 [pin 15] - GND_4 [pin 21] - GND_5 [pin 27] - GND_6 [pin 33] - GND_7 [pin 39] - GND_8 [pin 45] - GND_9 [pin 51] - MP1 [pin 76] - MP2 [pin 77] - SIGNAL_1 [pin 5] - SIGNAL_10 [pin 31] - SIGNAL_11 [pin 35] - SIGNAL_12 [pin 37] - SIGNAL_13 [pin 41] - SIGNAL_14 [pin 43] - SIGNAL_15 [pin 47] - SIGNAL_16 [pin 49] - SIGNAL_17 [pin 53] - SIGNAL_18 [pin 55] - SIGNAL_2 [pin 7] - SIGNAL_3 [pin 11] - SIGNAL_4 [pin 13] - SIGNAL_5 [pin 17] - SIGNAL_6 [pin 19] - SIGNAL_7 [pin 23] - SIGNAL_8 [pin 25] - SIGNAL_9 [pin 29] - SIGNAL/GND_1 [pin 1] - SIGNAL/GND_10 [pin 18] - SIGNAL/GND_11 [pin 20] - SIGNAL/GND_12 [pin 22] - SIGNAL/GND_13 [pin 24] - SIGNAL/GND_14 [pin 26] - SIGNAL/GND_15 [pin 28] - SIGNAL/GND_16 [pin 30] - SIGNAL/GND_17 [pin 32] - SIGNAL/GND_18 [pin 34] - SIGNAL/GND_19 [pin 36] - SIGNAL/GND_2 [pin 2] - SIGNAL/GND_20 [pin 38] - SIGNAL/GND_21 [pin 40] - SIGNAL/GND_22 [pin 42] - SIGNAL/GND_23 [pin 44] - SIGNAL/GND_24 [pin 46] - SIGNAL/GND_25 [pin 48] - SIGNAL/GND_26 [pin 50] - SIGNAL/GND_27 [pin 52] - SIGNAL/GND_28 [pin 54] - SIGNAL/GND_29 [pin 56] - SIGNAL/GND_3 [pin 4] - SIGNAL/GND_30 [pin 58] - SIGNAL/GND_31 [pin 67] - SIGNAL/GND_32 [pin 68] - SIGNAL/GND_33 [pin 69] - SIGNAL/GND_34 [pin 70] - SIGNAL/GND_35 [pin 71] - SIGNAL/GND_36 [pin 72] - SIGNAL/GND_37 [pin 73] - SIGNAL/GND_38 [pin 74] - SIGNAL/GND_39 [pin 75] - SIGNAL/GND_4 [pin 6] - SIGNAL/GND_5 [pin 8] - SIGNAL/GND_6 [pin 10] - SIGNAL/GND_7 [pin 12] - SIGNAL/GND_8 [pin 14] - SIGNAL/GND_9 [pin 16] ### J4 — [CX90BW1-24P1](https://www.flux.ai/adrian95/cx90bw1-24p1.md) - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.hirose.com/en/product/document?clcode=CL0480-1039-0-00&productname=CX90BW1-24P1&series=CX&documenttype=2DDrawing&lang=en&documentid=CX90BW1-24P_4801038000_4801039000_2D_Eng - Manufacturer Name: Hirose - Part Type: Connectors - Manufacturer Part Number: CX90BW1-24P1 **Pins:** - CC1 [pin A5] - CC2 [pin B5] - D-_1 [pin A7] - D-_2 [pin B7] - D+_1 [pin A6] - D+_2 [pin B6] - GND_1 [pin A1] - GND_2 [pin A12] - GND_3 [pin B1] - GND_4 [pin B12] - MH1 [pin 1] - MH2 [pin 2] - MH3 [pin 3] - MH4 [pin 4] - RX1- [pin B10] - RX1+ [pin B11] - RX2- [pin A10] - RX2+ [pin A11] - SBU1 [pin A8] - SBU2 [pin B8] - TX1- [pin A3] - TX1+ [pin A2] - TX2- [pin B3] - TX2+ [pin B2] - VBUS_1 [pin A4] - VBUS_2 [pin A9] - VBUS_3 [pin B4] - VBUS_4 [pin B9] ### Q1 — [CSD17578Q5A](https://www.flux.ai/kicad-part-library/csd17578q5a~hs8.md) - Package or Case Code: TDSON-8-1 - Role Details: First-pass same MOSFET for high-side and low-side; validate switching/thermal loss. - Manufacturer Name: Texas Instruments Inc. - Role: Switching - Datasheet URL: {"text":"http://www.ti.com/lit/gpn/csd17578q5a","value":"http://www.ti.com/lit/gpn/csd17578q5a","type":"link"} - Manufacturer Part Number: CSD17578Q5A **Pins:** - D [pin 5] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### Q2 — [CSD17578Q5A](https://www.flux.ai/kicad-part-library/csd17578q5a~hs8.md) - Manufacturer Part Number: CSD17578Q5A - Package or Case Code: TDSON-8-1 - Role Details: First-pass same MOSFET for high-side and low-side; validate switching/thermal loss. - Datasheet URL: {"value":"http://www.ti.com/lit/gpn/csd17578q5a","text":"http://www.ti.com/lit/gpn/csd17578q5a","type":"link"} - Role: Switching - Manufacturer Name: Texas Instruments Inc. **Pins:** - D [pin 5] - G [pin 4] - S [pin 3] - S [pin 1] - S [pin 2] ### U1 — ASM2464PDX - Package: 10x10mm BGA273/FCCSP - Manufacturer Part Number: ASM2464PDX - Package or Case Code: TO - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/user-uploaded/b559ae236bf9cdf3a5b8c0c9b66ff1b82509ff251ad34f49e657e1821f2d8a09.pdf - Manufacturer Name: ASMedia **Pins:** - CC1 [pin AA6] - CC2 [pin Y6] - GND [pin L2] - GND [pin R2] - GND [pin E5] - GND [pin D17] - GND [pin N9] - GND [pin E17] - GND [pin H8] - GND [pin K2] - GND [pin V17] - GND [pin W1] - GND [pin Y3] - GND [pin V13] - GND [pin U2] - GND [pin AA5] - GND [pin AA16] - GND [pin T20] - GND [pin V14] - GND [pin P9] - GND [pin N11] - GND [pin U17] - GND [pin Y12] - GND [pin P5] - GND [pin U4] - GND [pin Y14] - GND [pin V16] - GND [pin Y16] - GND [pin P18] - GND [pin V8] - GND [pin AA18] - GND [pin R1] - GND [pin T21] - GND [pin E4] - GND [pin L1] - GND [pin V5] - GND [pin P20] - GND [pin AA20] - GND [pin J6] - GND [pin D11] - GND [pin H17] - GND [pin V18] - GND [pin V11] - GND [pin L5] - GND [pin V20] - GND [pin T17] - GND [pin V4] - GND [pin H18] - GND [pin AA14] - GND [pin F8] - GND [pin J5] - GND [pin H4] - GND [pin P4] - GND [pin AA21] - GND [pin N17] - GND [pin N13] - GND [pin T18] - GND [pin V9] - GND [pin V6] - GND [pin Y18] - GND [pin J4] - GND [pin D4] - GND [pin L4] - GND [pin N1] - GND [pin U18] - GND [pin AA1] - GND [pin W2] - GND [pin U5] - GND [pin N2] - GND [pin F17] - GND [pin F4] - GND [pin E18] - GND [pin L9] - GND [pin Y21] - GND [pin F18] - GND [pin N18] - GND [pin Y9] - GND [pin AA9] - GND [pin P21] - GND [pin D18] - GND [pin T5] - GND [pin F5] - GND [pin P17] - GND [pin P11] - GND [pin D5] - GND [pin L13] - GND [pin M20] - GND [pin N5] - GND [pin Y20] - GND [pin J11] - GND [pin N4] - GND [pin Y5] - GND [pin AA12] - GND [pin V21] - GND [pin M21] - GND [pin AA2] - GND [pin U1] - GND [pin T4] - GPIO0 [pin D1] - GPIO1 [pin C1] - GPIO14 [pin A20] - GPIO15 [pin A6] - GPIO16 [pin A7] - GPIO17 [pin A8] - GPIO18 [pin A9] - GPIO19 [pin A10] - GPIO2 [pin B1] - GPIO20 [pin A11] - GPIO21 [pin A12] - GPIO22 [pin A13] - GPIO23 [pin A14] - GPIO24 [pin A15] - GPIO25 [pin A16] - GPIO26 [pin A17] - GPIO27 [pin A18] - GPIO3 [pin A1] - GPIO8 [pin A19] - HDDPC [pin C21] - I2C_CLK_P [pin E1] - I2C_DATA_P [pin F1] - NC0 [pin J2] - NC1 [pin H2] - NC10 [pin B5] - NC11 [pin B6] - NC12 [pin B7] - NC13 [pin B8] - NC14 [pin B9] - NC15 [pin B10] - NC16 [pin B11] - NC17 [pin B12] - NC18 [pin B13] - NC19 [pin B14] - NC2 [pin G2] - NC20 [pin B15] - NC21 [pin B16] - NC22 [pin B17] - NC23 [pin B18] - NC24 [pin B19] - NC25 [pin B20] - NC26 [pin C20] - NC27 [pin D20] - NC28 [pin E20] - NC29 [pin F20] - NC3 [pin F2] - NC30 [pin G20] - NC31 [pin H20] - NC4 [pin E2] - NC5 [pin D2] - NC6 [pin C2] - NC7 [pin B2] - NC8 [pin B3] - NC9 [pin B4] - PERST#0 [pin G21] - PERST#1 [pin F21] - PERST#2 [pin E21] - PERST#3 [pin D21] - PRXN0 [pin N20] - PRXN1 [pin W20] - PRXN2 [pin AA19] - PRXN3 [pin Y13] - PRXP0 [pin N21] - PRXP1 [pin W21] - PRXP2 [pin Y19] - PRXP3 [pin AA13] - PTXN0 [pin R21] - PTXN1 [pin U21] - PTXN2 [pin AA17] - PTXN3 [pin AA15] - PTXP0 [pin R20] - PTXP1 [pin U20] - PTXP2 [pin Y17] - PTXP3 [pin Y15] - REFCLKN0 [pin Y8] - REFCLKN1 [pin Y11] - REFCLKN2 [pin Y10] - REFCLKN3 [pin Y7] - REFCLKP0 [pin AA8] - REFCLKP1 [pin AA11] - REFCLKP2 [pin AA10] - REFCLKP3 [pin AA7] - RST# [pin H1] - SBU1 [pin K1] - SBU2 [pin J1] - SPI_CLK [pin A5] - SPI_CS# [pin A2] - SPI_DI [pin A4] - SPI_DO [pin A3] - TEST_EN [pin H21] - UART_RX [pin A21] - UART_TX [pin B21] - UDM [pin M2] - UDP [pin M1] - UREXT [pin AA3] - URXN0 [pin P2] - URXN1 [pin Y1] - URXP0 [pin P1] - URXP1 [pin Y2] - UTXN0 [pin T2] - UTXN1 [pin V1] - UTXP0 [pin T1] - UTXP1 [pin V2] - VBUS [pin G1] - VCCA33 [pin H5] - VCCH [pin E6] - VCCH [pin H6] - VCCH [pin D13] - VCCH [pin E13] - VCCH [pin E9] - VCCH [pin E8] - VCCH [pin D9] - VCCH [pin D6] - VCCH [pin F6] - VCCH [pin D8] - VCCH [pin F13] - VCCL [pin U6] - VCCL [pin T16] - VCCL [pin U16] - VCCL [pin L21] - VCCL [pin N6] - VCCL [pin U11] - VCCL [pin L16] - VCCL [pin P16] - VCCL [pin T6] - VCCL [pin L20] - VCCL [pin U14] - VCCL [pin P6] - VCCL [pin U13] - VCCL [pin L18] - VCCL [pin N16] - VCCL [pin L6] - VCCL [pin L17] - VDD [pin D14] - VDD [pin H13] - VDD [pin J16] - VDD [pin P8] - VDD [pin H16] - VDD [pin P13] - VDD [pin H11] - VDD [pin T11] - VDD [pin T13] - VDD [pin T9] - VDD [pin E16] - VDD [pin L11] - VDD [pin N8] - VDD [pin D16] - VDD [pin E11] - VDD [pin J8] - VDD [pin J13] - VDD [pin T8] - VDD [pin J21] - VDD [pin F11] - VDD [pin K20] - VDD [pin N14] - VDD [pin L14] - VDD [pin U8] - VDD [pin J14] - VDD [pin E14] - VDD [pin U9] - VDD [pin L8] - VDD [pin T14] - VDD [pin F14] - VDD [pin J18] - VDD [pin P14] - VDD [pin J17] - VDD [pin F16] - VDD [pin H9] - VDD [pin F9] - VDD [pin H14] - VDD [pin K21] - VDD [pin J20] - VDD [pin J9] - XI [pin AA4] - XO [pin Y4] ### U3 — [TPS259474LRPWR](https://www.flux.ai/lcsc/tps259474lrpwr~74ql.md) - Role: Protection - Package or Case Code: VQFN-10_L2.0-W2.0-P0.45-TL - Manufacturer Part Number: TPS259474LRPWR - Role Details: Input eFuse on USB-C VBUS_RAW bus-powered path; IN and EN/UVLO tied to VBUS_RAW for fixed 5 V Option A pending final ASMedia/TI threshold audit. - LCSC Part Number: C2864845 - Symbol Style: parametric-v1 - Part Type: Power Management - Manufacturer Name: TI(德州仪器) - Datasheet URL: https://www.lcsc.com/datasheet/C2864845.pdf?spm=wm.sxq.inf.ggs&lcsc_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRTlhdXlBVQVFWUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D - JLCPCB Part Class: Extended Part **Pins:** - DVDT [pin 7] - EN/UVLO [pin 1] - GND [pin 8] - ILM [pin 9] - IN [pin 5] - ITIMER [pin 10] - OUT [pin 6] - OVLO/OVCSEL [pin 2] - PG/AUXOFF [pin 3] - PGTH/~{FLT} [pin 4] ### U4 — [LM5143RHAR](https://www.flux.ai/adrian95/lm5143rhar~85v.md) - Datasheet URL: https://www.mouser.in/ProductDetail/Texas-Instruments/LM5143RHAR?qs=Znm5pLBrcALnKKCAKA%252Bg0Q%3D%3D - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Name: Texas Instruments - Package or Case Code: QFN50P600X600X100-41N-D - Role Details: 400 kHz first-pass, 3.3uH inductor, 10mΩ sense, UVLO 54.9k/20.0k startup gate. - Manufacturer Part Number: LM5143RHAR - Role: Power Conversion **Pins:** - AGND [pin 35] - COMP1 [pin 29] - COMP2 [pin 2] - CS1 [pin 27] - CS2 [pin 4] - DEMB [pin 33] - DITH [pin 38] - EN1 [pin 31] - EN2 [pin 40] - FB1 [pin 28] - FB2 [pin 3] - GND [pin 41] - HB1 [pin 20] - HB2 [pin 11] - HO1 [pin 22] - HO2 [pin 9] - HOL1 [pin 23] - HOL2 [pin 8] - LO1 [pin 18] - LO2 [pin 13] - LOL1 [pin 19] - LOL2 [pin 12] - MODE [pin 34] - PG1 [pin 24] - PG2 [pin 7] - PGND1 [pin 17] - PGND2 [pin 14] - RES [pin 32] - RT [pin 37] - SS1 [pin 30] - SS2 [pin 1] - SW1 [pin 21] - SW2 [pin 10] - SYNCOUT [pin 39] - VCC_1 [pin 15] - VCC_2 [pin 16] - VCCX [pin 6] - VDDA [pin 36] - VIN [pin 25] - VOUT1 [pin 26] - VOUT2 [pin 5] ### U5 — [LMR33630BDDAR](https://www.flux.ai/lcsc/lmr33630bddar~o51d.md) - Part Type: DC-DC Converters - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL-EP2.8-1 - Role Details: Target 1.05 V rail for ASM2464PD core; validate feedback network and current margin. - Role: Power Conversion - JLCPCB Part Class: Extended Part - Datasheet URL: https://www.ti.com/lit/ds/symlink/lmr33630.pdf - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: LMR33630BDDAR - LCSC Part Number: C544370 **Pins:** - BOOT [pin 7] - EN [pin 3] - EP [pin 9] - FB [pin 5] - PG [pin 4] - PGND [pin 1] - SW [pin 8] - VCC [pin 6] - VIN [pin 2] ### U6 — [TPS62901QRYTRQ1](https://www.flux.ai/adrian95/tps62901qrytrq1~84l.md) - Role Details: Target 1.9 V rail for ASM2464PD PHY/low-voltage rail; validate feedback network. - Manufacturer Name: Texas Instruments - Manufacturer Part Number: TPS62901QRYTRQ1 - Package or Case Code: TPS62901QRYTRQ1 - Part Type: Integrated Circuit - Datasheet URL: https://www.ti.com/lit/gpn/tps62901-q1 - Role: Power Conversion - License: https://creativecommons.org/licenses/by/4.0/ **Pins:** - EN [pin 5] - FB/VSET_1 [pin 9] - FB/VSET_2 [pin 13] - GND_1 [pin 4] - GND_2 [pin 11] - MODE/_S-CONF_1 [pin 7] - MODE/_S-CONF_2 [pin 12] - PG [pin 1] - SS/TR [pin 8] - SW [pin 2] - VIN [pin 6] - VOS_1 [pin 3] - VOS_2 [pin 10] ### U7 — [TPS22995RZGR](https://www.flux.ai/adrian95/tps22995rzgr.md) - Manufacturer Name: Texas Instruments - Manufacturer Part Number: TPS22995RZGR - Role Details: Switches 3.3 V rail to M.2 SSD; enable from ASM2464PD HDDPC/power-control path when full component exposes pin. - Part Type: Integrated Circuit - License: https://creativecommons.org/licenses/by/4.0/ - Datasheet URL: https://www.ti.com/lit/ds/symlink/tps22995.pdf - Role: Switching **Pins:** - CT [pin 6] - GND [pin 4] - ON [pin 3] - VBIAS [pin 1] - VIN [pin 2] - VOUT [pin 5] ### U8 — [W25Q64JVSSIQ-TRAY](https://www.flux.ai/jecstronic/w25q64jvssiq-tray~9xp.md) - Role: Memory - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: W25Q64JVSSIQ-TRAY - Part Type: Integrated Circuit - Manufacturer Name: Winbond Electronics - Role Details: SPI flash candidate; density/support must be confirmed against ASMedia reference design. - Datasheet URL: https://www.winbond.com/resource-files/w25q64jv%20revj%2003272018%20plus.pdf **Pins:** - /CS [pin 1] - /HOLD_OR_/RESETIO3 [pin 7] - /WPIO2 [pin 3] - CLK [pin 6] - DIIO0 [pin 5] - DOIO1 [pin 2] - GND [pin 4] - VCC [pin 8] ### U9 — [TPS3839G33DBZT](https://www.flux.ai/lcsc/tps3839g33dbzt~dxu.md) - LCSC Part Number: C2877913 - Part Type: Monitors & Reset Circuits - Package or Case Code: SOT-23-3_L2.9-W1.3-P0.95-LS2.4-BR - Role Details: Active-low reset supervisor for ASM2464PD RST# path; timing must be validated. - Datasheet URL: https://www.ti.com/general/docs/suppproductinfo.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww.ti.com%2Flit%2Fgpn%2Ftps3839 - Role: Voltage Reference - Symbol Style: parametric-v1 - Manufacturer Name: TI(德州仪器) - Manufacturer Part Number: TPS3839G33DBZT **Pins:** - ~{RESET} [pin 2] - GND [pin 1] - VDD [pin 3] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/jonathanmckinney/usb4-nvme-ssd-enclosure~xo](https://www.flux.ai/jonathanmckinney/usb4-nvme-ssd-enclosure~xo).* --- *Generated from [https://www.flux.ai/jonathanmckinney/usb4-nvme-ssd-enclosure~xo](https://www.flux.ai/jonathanmckinney/usb4-nvme-ssd-enclosure~xo)*