# USB\-C Device Sequencer

## Description

Production\-intent USB\-C device power and USB 2\.0 data sequencer for Raspberry Pi retail audio systems, with independent data/VBUS control and prioritized external 5 V power\.

## Project Details

- **Owner:** jacobgush
- **Created:** 9/23/2026
- **Last Updated:** 9/27/2026
- **Visibility:** Public

## Key Components

### D1 — [TPD2EUSB30DRTR](https://flux.ai/vasy_skral/tpd2eusb30drtr~pc.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: TPD2EUSB30DRTR
- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftpd2eusb30
- Functional Group: IO J1 Control USB\-C
- Role Details: Low\-capacitance protection for J1 D\+/D\-
- Role: USB data ESD
- Manufacturer Name: Texas Instruments
- Part Type: Protection

**Pins:**
- D\- [pin 2]
- D\+ [pin 1]
- GND [pin 3]

### D10 — [SMAJ5\.0A\-Q](https://flux.ai/lcsc/smaj5p0a-q~a86n.md)

- Functional Group: IO J3 External Power USB\-C
- Package or Case Code: SMA\_L4\.4\-W2\.8\-LS5\.1\-RD
- Role Details: External VBUS transient clamp after input PTC
- Manufacturer Part Number: SMAJ5\.0A\-Q
- Manufacturer Name: BOURNS
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: TVS
- LCSC Part Number: C1869355
- Datasheet URL: https://www\.lcsc\.com/datasheet/C1869355\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNeR1VeUVFRTlBbUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D
- Role: VBUS TVS

**Pins:**
- A [pin 2]
- C [pin 1]

### D11 — [SMAJ5\.0A\-Q](https://flux.ai/lcsc/smaj5p0a-q~a86n.md)

- Package or Case Code: SMA\_L4\.4\-W2\.8\-LS5\.1\-RD
- Manufacturer Part Number: SMAJ5\.0A\-Q
- Manufacturer Name: BOURNS
- Functional Group: IO J4 Device USB\-C
- Role Details: Downstream VBUS transient clamp at J4
- Role: VBUS TVS
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: TVS
- LCSC Part Number: C1869355
- Datasheet URL: https://www\.lcsc\.com/datasheet/C1869355\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNeR1VeUVFRTlBbUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D

**Pins:**
- A [pin 2]
- C [pin 1]

### D2 — [TPD2EUSB30DRTR](https://flux.ai/vasy_skral/tpd2eusb30drtr~pc.md)

- Role Details: Low\-capacitance protection for J2 D\+/D\-
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: TPD2EUSB30DRTR
- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftpd2eusb30
- Role: USB data ESD
- Functional Group: IO J2 Host USB\-C
- Manufacturer Name: Texas Instruments
- Part Type: Protection

**Pins:**
- D\- [pin 2]
- D\+ [pin 1]
- GND [pin 3]

### D3 — [TPD2EUSB30DRTR](https://flux.ai/vasy_skral/tpd2eusb30drtr~pc.md)

- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: TPD2EUSB30DRTR
- Role Details: Low\-capacitance protection for J4 D\+/D\-
- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftpd2eusb30
- Role: USB data ESD
- Functional Group: IO J4 Device USB\-C
- Manufacturer Name: Texas Instruments
- Part Type: Protection

**Pins:**
- D\- [pin 2]
- D\+ [pin 1]
- GND [pin 3]

### D4 — [TPD4E05U06DQAR](https://flux.ai/lcsc/tpd4e05u06dqar~l929.md)

- Manufacturer Part Number: TPD4E05U06DQAR
- Role Details: Low\-capacitance ESD protection for J1 CC1 and CC2
- Package or Case Code: DFN2510\-10\_L2\.5\-W1\.0\-P0\.50\-BL
- Datasheet URL: https://www\.lcsc\.com/datasheet/C138714\.pdf?spm=wm\.sxq\.inf\.ggs&utm\_source=octopart&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRT1FdVFBSRFVdVDsOAxUeFF5JWA4NEwsWFhMaSQcJGk4%3D
- JLCPCB Part Class: Extended Part
- Role: CC ESD
- Functional Group: IO J1 Control USB\-C
- Manufacturer Name: TI
- Operating Temperature: \-40℃\~\+125℃@\(Ta\)
- LCSC Part Number: C138714
- Part Type: ESD Protection Devices

**Pins:**
- D1\- [pin 2]
- D1\+ [pin 1]
- D2\- [pin 5]
- D2\+ [pin 4]
- GND [pin 3]
- GND [pin 8]
- NC [pin 9]
- NC [pin 10]
- NC [pin 7]
- NC [pin 6]

### D5 — [TPD4E05U06DQAR](https://flux.ai/lcsc/tpd4e05u06dqar~l929.md)

- Role Details: Low\-capacitance ESD protection for J2 CC1 and CC2
- Manufacturer Part Number: TPD4E05U06DQAR
- Package or Case Code: DFN2510\-10\_L2\.5\-W1\.0\-P0\.50\-BL
- Datasheet URL: https://www\.lcsc\.com/datasheet/C138714\.pdf?spm=wm\.sxq\.inf\.ggs&utm\_source=octopart&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRT1FdVFBSRFVdVDsOAxUeFF5JWA4NEwsWFhMaSQcJGk4%3D
- Functional Group: IO J2 Host USB\-C
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TI
- Operating Temperature: \-40℃\~\+125℃@\(Ta\)
- LCSC Part Number: C138714
- Part Type: ESD Protection Devices
- Role: CC ESD

**Pins:**
- D1\- [pin 2]
- D1\+ [pin 1]
- D2\- [pin 5]
- D2\+ [pin 4]
- GND [pin 3]
- GND [pin 8]
- NC [pin 9]
- NC [pin 10]
- NC [pin 7]
- NC [pin 6]

### D6 — [TPD4E05U06DQAR](https://flux.ai/lcsc/tpd4e05u06dqar~l929.md)

- Manufacturer Part Number: TPD4E05U06DQAR
- Functional Group: IO J3 External Power USB\-C
- Package or Case Code: DFN2510\-10\_L2\.5\-W1\.0\-P0\.50\-BL
- Datasheet URL: https://www\.lcsc\.com/datasheet/C138714\.pdf?spm=wm\.sxq\.inf\.ggs&utm\_source=octopart&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRT1FdVFBSRFVdVDsOAxUeFF5JWA4NEwsWFhMaSQcJGk4%3D
- Role Details: Low\-capacitance ESD protection for J3 CC1 and CC2
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TI
- Role: CC ESD
- Operating Temperature: \-40℃\~\+125℃@\(Ta\)
- LCSC Part Number: C138714
- Part Type: ESD Protection Devices

**Pins:**
- D1\- [pin 2]
- D1\+ [pin 1]
- D2\- [pin 5]
- D2\+ [pin 4]
- GND [pin 3]
- GND [pin 8]
- NC [pin 9]
- NC [pin 10]
- NC [pin 7]
- NC [pin 6]

### D7 — [TPD4E05U06DQAR](https://flux.ai/lcsc/tpd4e05u06dqar~l929.md)

- Role Details: Low\-capacitance ESD protection for J4 CC1 and CC2
- Manufacturer Part Number: TPD4E05U06DQAR
- Package or Case Code: DFN2510\-10\_L2\.5\-W1\.0\-P0\.50\-BL
- Datasheet URL: https://www\.lcsc\.com/datasheet/C138714\.pdf?spm=wm\.sxq\.inf\.ggs&utm\_source=octopart&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRT1FdVFBSRFVdVDsOAxUeFF5JWA4NEwsWFhMaSQcJGk4%3D
- JLCPCB Part Class: Extended Part
- Manufacturer Name: TI
- Operating Temperature: \-40℃\~\+125℃@\(Ta\)
- LCSC Part Number: C138714
- Part Type: ESD Protection Devices
- Functional Group: IO J4 Device USB\-C
- Role: CC ESD

**Pins:**
- D1\- [pin 2]
- D1\+ [pin 1]
- D2\- [pin 5]
- D2\+ [pin 4]
- GND [pin 3]
- GND [pin 8]
- NC [pin 9]
- NC [pin 10]
- NC [pin 7]
- NC [pin 6]

### D8 — [SMAJ5\.0A\-Q](https://flux.ai/lcsc/smaj5p0a-q~a86n.md)

- Package or Case Code: SMA\_L4\.4\-W2\.8\-LS5\.1\-RD
- Manufacturer Part Number: SMAJ5\.0A\-Q
- Manufacturer Name: BOURNS
- Role: VBUS TVS
- Functional Group: IO J1 Control USB\-C
- Role Details: Control VBUS transient clamp after input PTC
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: TVS
- LCSC Part Number: C1869355
- Datasheet URL: https://www\.lcsc\.com/datasheet/C1869355\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNeR1VeUVFRTlBbUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D

**Pins:**
- A [pin 2]
- C [pin 1]

### D9 — [SMAJ5\.0A\-Q](https://flux.ai/lcsc/smaj5p0a-q~a86n.md)

- Package or Case Code: SMA\_L4\.4\-W2\.8\-LS5\.1\-RD
- Role Details: Host VBUS transient clamp after input PTC
- Manufacturer Part Number: SMAJ5\.0A\-Q
- Role: VBUS TVS
- Manufacturer Name: BOURNS
- License: https://creativecommons\.org/licenses/by/4\.0/
- Functional Group: IO J2 Host USB\-C
- Part Type: TVS
- LCSC Part Number: C1869355
- Datasheet URL: https://www\.lcsc\.com/datasheet/C1869355\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNeR1VeUVFRTlBbUzsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D

**Pins:**
- A [pin 2]
- C [pin 1]

### F1 — [1206L050/15YR](https://flux.ai/jecstronic/1206l05015yr~ad2.md)

- Functional Group: IO J1 Control USB\-C
- Manufacturer Name: Littelfuse Inc\.
- Manufacturer Part Number: 1206L050/15YR
- Datasheet URL: https://www\.littelfuse\.com/media?resourcetype=datasheets&itemid=2b6a1515\-d4ee\-4c83\-8bd4\-152b4901b8f5&filename=littelfuse\_ptc\_1206l\_datasheet\.pdf
- Role: Input overcurrent protection
- Part Type: Fuse
- Role Details: 500 mA hold control\-port resettable protection
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### F2 — [1206L110/16WR](https://flux.ai/adrian95/1206l11016wr~ne.md)

- Functional Group: IO J2 Host USB\-C
- Manufacturer Name: Littelfuse Inc\.
- Role: Input overcurrent protection
- Manufacturer Part Number: 1206L110/16WR
- Datasheet URL: https://www\.littelfuse\.com/assetdocs/littelfuse\-ptc\-1206l\-datasheet?assetguid=2b6a1515\-d4ee\-4c83\-8bd4\-152b4901b8f5
- Role Details: 1\.1 A hold host\-fallback limit prevents treating J2 as guaranteed 3 A source
- Part Type: Fuse
- License: https://creativecommons\.org/licenses/by/4\.0/

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### F3 — [ASMD2920\-400](https://flux.ai/lcsc/asmd2920-400~3g5a.md)

- Manufacturer Name: JDTfuse\(集电通\)
- Package or Case Code: FUSE\-SMD\_L8\.0\-W5\.4
- Manufacturer Part Number: ASMD2920\-400
- LCSC Part Number: C135383
- Role: Input overcurrent protection
- JLCPCB Part Class: Extended Part
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2305151204\_Shenzhen\-JDT\-Fuse\-ASMD2920\-400\_C135383\.pdf
- Part Type: Resettable Fuses
- Product Info Url: https://lcsc\.com/product\-detail/Surface\-Mount\-Fuses\_4A\-Self\-recovery\_C135383\.html
- Functional Group: IO J3 External Power USB\-C
- Role Details: 4 A hold external\-input PTC selected for 3 A path with thermal derating margin

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J1 — [UJ20\-C\-H\-C\-4\-SMT\-TR](https://flux.ai/adrian95/uj20-c-h-c-4-smt-tr~hms.md)

- Manufacturer Name: Same Sky \(Formerly CUI Devices\)
- Datasheet URL: https://www\.sameskydevices\.com/product/resource/uj20\-c\-h\-c\-4\-smt\-tr\.pdf
- Part Type: USB C
- Symbol Style: parametric\-v1
- Manufacturer Part Number: UJ20\-C\-H\-C\-4\-SMT\-TR
- Role: Control USB\-C port
- Role Details: UFP control input, CH340C USB data and control\-side 5 V
- Connector Gender: Receptacle
- License: https://creativecommons\.org/licenses/by/4\.0/
- Functional Group: IO J1 Control USB\-C
- Connector Type: USB Connectors

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin A1\_B12]
- GND\_\_1 [pin A12\_B1]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD\_\_1 [pin SH2]
- SHIELD\_\_2 [pin SH3]
- SHIELD\_\_3 [pin SH4]
- VBUS [pin A4\_B9]
- VBUS\_\_1 [pin A9\_B4]

### J2 — [UJ20\-C\-H\-C\-4\-SMT\-TR](https://flux.ai/adrian95/uj20-c-h-c-4-smt-tr~hms.md)

- Manufacturer Name: Same Sky \(Formerly CUI Devices\)
- Datasheet URL: https://www\.sameskydevices\.com/product/resource/uj20\-c\-h\-c\-4\-smt\-tr\.pdf
- Role: Host USB\-C port
- Part Type: USB C
- Symbol Style: parametric\-v1
- Manufacturer Part Number: UJ20\-C\-H\-C\-4\-SMT\-TR
- Connector Gender: Receptacle
- License: https://creativecommons\.org/licenses/by/4\.0/
- Connector Type: USB Connectors
- Functional Group: IO J2 Host USB\-C
- Role Details: Upstream USB 2\.0 data input and protected fallback VBUS

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin A1\_B12]
- GND\_\_1 [pin A12\_B1]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD\_\_1 [pin SH2]
- SHIELD\_\_2 [pin SH3]
- SHIELD\_\_3 [pin SH4]
- VBUS [pin A4\_B9]
- VBUS\_\_1 [pin A9\_B4]

### J3 — [UJ20\-C\-H\-C\-4\-SMT\-TR](https://flux.ai/adrian95/uj20-c-h-c-4-smt-tr~hms.md)

- Manufacturer Name: Same Sky \(Formerly CUI Devices\)
- Datasheet URL: https://www\.sameskydevices\.com/product/resource/uj20\-c\-h\-c\-4\-smt\-tr\.pdf
- Role Details: Known regulated 5 V external supply input
- Part Type: USB C
- Symbol Style: parametric\-v1
- Manufacturer Part Number: UJ20\-C\-H\-C\-4\-SMT\-TR
- Role: External power USB\-C port
- Connector Gender: Receptacle
- License: https://creativecommons\.org/licenses/by/4\.0/
- Connector Type: USB Connectors
- Functional Group: IO J3 External Power USB\-C

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin A1\_B12]
- GND\_\_1 [pin A12\_B1]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD\_\_1 [pin SH2]
- SHIELD\_\_2 [pin SH3]
- SHIELD\_\_3 [pin SH4]
- VBUS [pin A4\_B9]
- VBUS\_\_1 [pin A9\_B4]

### J4 — [UJ20\-C\-H\-C\-4\-SMT\-TR](https://flux.ai/adrian95/uj20-c-h-c-4-smt-tr~hms.md)

- Manufacturer Name: Same Sky \(Formerly CUI Devices\)
- Datasheet URL: https://www\.sameskydevices\.com/product/resource/uj20\-c\-h\-c\-4\-smt\-tr\.pdf
- Part Type: USB C
- Symbol Style: parametric\-v1
- Manufacturer Part Number: UJ20\-C\-H\-C\-4\-SMT\-TR
- Role: Device USB\-C port
- Role Details: Downstream USB 2\.0 data and switched VBUS source
- Connector Gender: Receptacle
- Functional Group: IO J4 Device USB\-C
- License: https://creativecommons\.org/licenses/by/4\.0/
- Connector Type: USB Connectors

**Pins:**
- CC1 [pin A5]
- CC2 [pin B5]
- DN1 [pin A7]
- DN2 [pin B7]
- DP1 [pin A6]
- DP2 [pin B6]
- GND [pin A1\_B12]
- GND\_\_1 [pin A12\_B1]
- SBU1 [pin A8]
- SBU2 [pin B8]
- SHIELD [pin SH1]
- SHIELD\_\_1 [pin SH2]
- SHIELD\_\_2 [pin SH3]
- SHIELD\_\_3 [pin SH4]
- VBUS [pin A4\_B9]
- VBUS\_\_1 [pin A9\_B4]

### Q1 — [2N7002,215](https://flux.ai/adrian95/2n7002215~nwc.md)

- Datasheet URL: https://assets\.nexperia\.com/documents/data\-sheet/2N7002\.pdf
- Manufacturer Name: Nexperia USA Inc\.
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: Actively discharges J4 VBUS through R22 whenever VBUS\_EN is low
- Part Type: Transistor
- Role: Switching
- Manufacturer Part Number: 2N7002,215
- Functional Group: POWER U4 Output eFuse

**Pins:**
- D [pin 2]
- G [pin 1]
- S [pin 3]

### Q2 — [2N7002,215](https://flux.ai/adrian95/2n7002215~nwc.md)

- Datasheet URL: https://assets\.nexperia\.com/documents/data\-sheet/2N7002\.pdf
- Functional Group: POWER U4 Output eFuse
- Manufacturer Name: Nexperia USA Inc\.
- License: https://creativecommons\.org/licenses/by/4\.0/
- Part Type: Transistor
- Role: Switching
- Manufacturer Part Number: 2N7002,215
- Role Details: Pulls Q1 gate low when VBUS\_EN is asserted, disabling discharge

**Pins:**
- D [pin 2]
- G [pin 1]
- S [pin 3]

### U1 — [CH340C](https://flux.ai/vasy_skral/ch340c~xfo.md)

- Datasheet URL: https://datasheet\.lcsc\.com/szlcsc/Jiangsu\-Qin\-Heng\-CH340C\_C84681\.pdf
- Functional Group: DIGITAL U1 CH340 Control
- Role Details: DTR\# controls downstream VBUS; RTS\# controls USB data switch
- Role: USB serial control
- Part Type: Integrated Circuit
- Manufacturer Name: Wah
- 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]

### U2 — [TS3USB221AQRSERQ1](https://flux.ai/adrian95/ts3usb221aqrserq1~ox9.md)

- Role Details: 480 Mbit/s bidirectional USB 2\.0 disconnect switch
- Functional Group: DIGITAL U2 USB Data Switch
- Role: USB data switch
- Manufacturer Name: Texas Instruments Inc\.
- Datasheet URL: https://www\.ti\.com/lit/ds/scds300e/scds300e\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: TS3USB221AQRSERQ1
- Part Type: Integrated Circuit

**Pins:**
- \~OE [pin 6]
- 1D\- [pin 2]
- 1D\+ [pin 1]
- 2D\- [pin 4]
- 2D\+ [pin 3]
- D\- [pin 7]
- D\+ [pin 8]
- GND [pin 5]
- S [pin 9]
- VCC [pin 10]

### U3 — [TPS2121RUXT](https://flux.ai/lcsc/tps2121ruxt~sk8d.md)

- JLCPCB Part Class: Extended Part
- Manufacturer Name: TI\(德州仪器\)
- Package or Case Code: VQFN\-HR\-12\_L2\.5\-W2\.0\-P0\.50\-BL
- Part Type: Monitors & Reset Circuits
- Role Details: External 5 V priority over host fallback; 3 A continuous design path
- Role: Source priority mux
- LCSC Part Number: C2156025
- Manufacturer Part Number: TPS2121RUXT
- Functional Group: POWER U3 Source Priority

**Pins:**
- CP2 [pin 3]
- GND [pin 12]
- ILM [pin 10]
- IN1 [pin 7]
- IN2 [pin 2]
- OUT [pin 8]
- OUT [pin 1]
- OV1 [pin 5]
- OV2 [pin 4]
- PR1 [pin 6]
- SS [pin 11]
- ST [pin 9]

### U4 — [TPS259474LRPWR](https://flux.ai/lcsc/tps259474lrpwr~74ql.md)

- Role: Output eFuse
- Manufacturer Part Number: TPS259474LRPWR
- Package or Case Code: VQFN\-10\_L2\.0\-W2\.0\-P0\.45\-TL
- JLCPCB Part Class: Extended Part
- Part Type: Power Management
- Symbol Style: parametric\-v1
- Manufacturer Name: TI\(德州仪器\)
- Role Details: 3 A downstream current limit, reverse\-current blocking, active output discharge
- Functional Group: POWER U4 Output eFuse
- LCSC Part Number: C2864845
- Datasheet URL: https://www\.lcsc\.com/datasheet/C2864845\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=T1kIXgFeT1NaU1RXQFBbUlUHT1cKU1NXFVBeX1VSTlAxVlNRTlhdXlBVQVFWUTsOAxUeFF5JWBYZEEoKFBINSQcJGk4dAgUUFAk%3D

**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]

### U5 — [SN74LVC1G04DCKR](https://flux.ai/vasy_skral/sn74lvc1g04dckr~6e.md)

- Part Type: Integrated Circuit
- Manufacturer Name: Texas Instruments
- Role: Control inverter
- Role Details: Convert active\-low DTR\# assertion to active\-high VBUS\_EN; unpowered state held off downstream
- Functional Group: DIGITAL U1 CH340 Control
- Datasheet URL: https://www\.ti\.com/lit/ds/symlink/sn74lvc1g04\.pdf
- Manufacturer Part Number: SN74LVC1G04DCKR

**Pins:**
- A [pin 2]
- GND [pin 3]
- NC [pin 1]
- VCC [pin 5]
- Y [pin 4]

### U6 — [TLV75533PDBVR](https://flux.ai/adrian95/tlv75533pdbvr~jy8.md)

- Datasheet URL: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftlv733p
- Manufacturer Name: Texas Instruments
- License: https://www\.ti\.com/general/docs/suppproductinfo\.tsp?distId=10&gotoUrl=https%3A%2F%2Fwww\.ti\.com%2Flit%2Fgpn%2Ftlv755p
- Functional Group: DIGITAL U2 USB Data Switch
- Part Type: Integrated Circuit
- Role: 3\.3 V LDO
- Symbol Style: parametric\-v1
- Package or Case Code: SOT95P280X145\-5N
- Role Details: Power USB high\-speed switch from host\-side VBUS without external\-power budget
- Manufacturer Part Number: TLV75533PDBVR

**Pins:**
- EN [pin 3]
- GND [pin 2]
- NC [pin 4]
- VIN [pin 1]
- VOUT [pin 5]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/jacobgush/usb\-c\-device\-sequencer\~1x](https://flux.ai/jacobgush/usb-c-device-sequencer~1x).*

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*Generated from [https://flux\.ai/jacobgush/usb\-c\-device\-sequencer\~1x](https://flux.ai/jacobgush/usb-c-device-sequencer~1x)*