# E303 Main Controller o9BP ## Project Details - **Owner:** ryanf - **Created:** 6/29/2026 - **Last Updated:** 6/29/2026 - **Visibility:** Public ## Key Components ### J3 — [5-520315-8](https://www.flux.ai/lcsc/5-520315-8~82m0.md) - Value: 5-520315-8 - Package or Case Code: FPC-TH_8P-P2.54_L4.8-W25.2 - Footprint: Library_base:5-520315-8 - LCSC Part Number: C305931 - Manufacturer Name: TE Connectivity(泰科电子) - Manufacturer Part Number: 5-520315-8 - JLCPCB Part Class: Extended Part - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/1811132034_TE-Connectivity-5-520315-8_C305931.pdf - Product Info Url: https://lcsc.com/product-detail/Others_TE-Connectivity_5-520315-8_TE-Connectivity-5-520315-8_C305931.html - Part Type: FFC/FPC Connectors - Reference: J3 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] - 7 [pin 7] - 8 [pin 8] ### J5 — [XH-2AW](https://www.flux.ai/lcsc/xh-2aw~22hl.md) - Reference: J5 - Value: S2B-XH-A-1 - Manufacturer Name: 韩国韩荣 - JLCPCB Part Class: Extended Part - Manufacturer Part Number: XH-2AW - Package or Case Code: CONN-TH_2P-P2.50_XH-2AW - Part Type: Wire To Board / Wire To Wire Connector - Datasheet: XH-2AW - LCSC Part Number: C2910520 - Footprint: Connector_JST:JST_XH_S2B-XH-A-1_1x02_P2.50mm_Horizontal **Pins:** - 1 [pin 1] - 2 [pin 2] ### U13 — [IP4220CZ6](https://www.flux.ai/lcsc/ip4220cz6~nj5t.md) - Footprint: Library_base:IP4220CZ6 - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.7-BL - Manufacturer Name: UMW(友台半导体) - LCSC Part Number: C2687127 - Reference: U13 - Value: IP4220CZ6 - Manufacturer Part Number: IP4220CZ6 - Part Type: TVS - JLCPCB Part Class: Extended Part **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### U14 — [AP331AWG-7](https://www.flux.ai/lcsc/ap331awg-7~4s6v.md) - Reference: U14 - Manufacturer Name: DIODES(美台) - Product Info Url: https://lcsc.com/product-detail/Analog-Comparators_DIODES_AP331AWG-7_AP331AWG-7_C151034.html - Footprint: Library_base:AP331AWG-7 - LCSC Part Number: C151034 - Manufacturer Part Number: AP331AWG-7 - Part Type: Comparators - Datasheet URL: https://www.lcsc.com/datasheet/lcsc_datasheet_2304140030_Diodes-Incorporated-AP331AWG-7_C151034.pdf - JLCPCB Part Class: Extended Part - Value: AP331AWG-7 - Package or Case Code: SOT-25-5_L3.0-W1.8-P0.95-LS3.0-BR **Pins:** - OUT [pin 4] - VDD [pin 5] - VIN- [pin 1] - VIN+ [pin 3] - VSS [pin 2] ### U15 — [AP22653AW6-7](https://www.flux.ai/lcsc/ap22653aw6-7~wt5p.md) - Manufacturer Name: DIODES(美台) - Manufacturer Part Number: AP22653AW6-7 - Part Type: Power Distribution Switches - Package or Case Code: SOT-26_L3.0-W1.6-P0.95-LS2.8-BL - JLCPCB Part Class: Extended Part - LCSC Part Number: C1511768 - Reference: U15 - Footprint: Library_base:IC6_AP22653AW6-7_DIO - Value: AP22653AW6-7 - Datasheet: AP22653AW6-7 **Pins:** - ~{FAULT} [pin 4] - EN [pin 3] - GND [pin 2] - ILIM [pin 5] - IN [pin 1] - OUT [pin 6] ### U16 — [MC34063AD](https://www.flux.ai/lcsc/mc34063ad~1pjo.md) - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_HTC-Korea-TAEJIN-Tech-MC34063AD_C118241.pdf - Product Info Url: https://lcsc.com/product-detail/DC-DC-Converters_HTC_MC34063AD_MC34063AGD_C118241.html - Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - Manufacturer Name: HTC - Manufacturer Part Number: MC34063AD - Datasheet: http://www.onsemi.com/pub_link/Collateral/MC34063A-D.PDF - JLCPCB Part Class: Extended Part - Part Type: DC-DC Converters - Value: MC34063AD - Reference: U16 - Package or Case Code: SOP-8_L4.9-W3.9-P1.27-LS6.0-BL - LCSC Part Number: C118241 **Pins:** - ComparatorInvertingInput [pin 5] - DriverCollector [pin 8] - GND [pin 4] - IPKSense [pin 7] - SwitchCollector [pin 1] - SwitchEmitter [pin 2] - TimingCapacitor [pin 3] - VCC [pin 6] ### U17 — Interface:AM26LS31CD 782Q - Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - Reference: U17 - Value: AM26LS31CD - Manufacturer Part Number: AM26LS31CD - Package or Case Code: 16-SOIC - Description: 32Mbps 3.3V RS485 Quad Line Drivers, SOIC-16 - Part Type: Integrated Circuits - Manufacturer Name: Texas Instruments - Datasheet: https://www.ti.com/lit/ds/symlink/am26ls31.pdf - Datasheet URL: https://www.ti.com/lit/ds/symlink/am26ls31.pdf **Pins:** - ~{G} [pin 12] - 1A [pin 1] - 1Y [pin 2] - 1Z [pin 3] - 2A [pin 7] - 2Y [pin 6] - 2Z [pin 5] - 3A [pin 9] - 3Y [pin 10] - 3Z [pin 11] - 4A [pin 15] - 4Y [pin 14] - 4Z [pin 13] - G [pin 4] - GND [pin 8] - VDD [pin 16] ### U18 — Interface:AM26LS31CD 782Q - Datasheet: https://www.ti.com/lit/ds/symlink/am26ls31.pdf - Package or Case Code: 16-SOIC - Value: AM26LS31CD - Datasheet URL: https://www.ti.com/lit/ds/symlink/am26ls31.pdf - Reference: U18 - Part Type: Integrated Circuits - Footprint: Package_SO:SOIC-16_3.9x9.9mm_P1.27mm - Manufacturer Name: Texas Instruments - Description: 32Mbps 3.3V RS485 Quad Line Drivers, SOIC-16 - Manufacturer Part Number: AM26LS31CD **Pins:** - ~{G} [pin 12] - 1A [pin 1] - 1Y [pin 2] - 1Z [pin 3] - 2A [pin 7] - 2Y [pin 6] - 2Z [pin 5] - 3A [pin 9] - 3Y [pin 10] - 3Z [pin 11] - 4A [pin 15] - 4Y [pin 14] - 4Z [pin 13] - G [pin 4] - GND [pin 8] - VDD [pin 16] ### U19 — 26LS32:26LS32 cCJk - SnapEDA_Link: https://www.snapeda.com/parts/26LS32/Texas+Instruments/view-part/?ref=snap - Package: None - Check_prices: https://www.snapeda.com/parts/26LS32/Texas+Instruments/view-part/?ref=eda - Price: None - Footprint: Package_SO:SO-16_3.9x9.9mm_P1.27mm - Manufacturer Part Number: 26LS32 - Reference: U19 - MP: 26LS32 - Availability: Not in stock - Value: 26LS32 - MF: National Semiconductor **Pins:** - A [pin 3] - A- [pin 1] - A+ [pin 2] - B [pin 5] - B- [pin 7] - B+ [pin 6] - C [pin 11] - C- [pin 9] - C+ [pin 10] - D [pin 13] - D- [pin 15] - D+ [pin 14] - ENA [pin 4] - ENA- [pin 12] - GND [pin 8] - VCC [pin 16] ### U2 — [IP4220CZ6](https://www.flux.ai/lcsc/ip4220cz6~nj5t.md) - Footprint: Library_base:IP4220CZ6 - Reference: U2 - Manufacturer Name: UMW(友台半导体) - Package or Case Code: SOT-23-6_L2.9-W1.6-P0.95-LS2.7-BL - Part Type: TVS - JLCPCB Part Class: Extended Part - Value: IP4220CZ6 - LCSC Part Number: C2687127 - Manufacturer Part Number: IP4220CZ6 **Pins:** - 1 [pin 1] - 2 [pin 2] - 3 [pin 3] - 4 [pin 4] - 5 [pin 5] - 6 [pin 6] ### U20 — 26LS32:26LS32 cCJk - Reference: U20 - MP: 26LS32 - Availability: Not in stock - Manufacturer Part Number: 26LS32 - Value: 26LS32 - Package: None - Price: None - SnapEDA_Link: https://www.snapeda.com/parts/26LS32/Texas+Instruments/view-part/?ref=snap - MF: National Semiconductor - Check_prices: https://www.snapeda.com/parts/26LS32/Texas+Instruments/view-part/?ref=eda - Footprint: Package_SO:SO-16_3.9x9.9mm_P1.27mm **Pins:** - A [pin 3] - A- [pin 1] - A+ [pin 2] - B [pin 5] - B- [pin 7] - B+ [pin 6] - C [pin 11] - C- [pin 9] - C+ [pin 10] - D [pin 13] - D- [pin 15] - D+ [pin 14] - ENA [pin 4] - ENA- [pin 12] - GND [pin 8] - VCC [pin 16] ### U3 — [M24C08-RMN6TP](https://www.flux.ai/lcsc/m24c08-rmn6tp~no7t.md) - Reference: U3 - Footprint: Library_base:M24C08-RMN6TP - Manufacturer Part Number: M24C08-RMN6TP - JLCPCB Part Class: Extended Part - Part Type: EEPROM - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - LCSC Part Number: C141777 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_STMicroelectronics-M24C08-RMN6TP_C141777.pdf - Value: M24C08-RMN6TP - Manufacturer Name: ST(意法半导体) - Product Info Url: https://lcsc.com/product-detail/EEPROM_STMicroelectronics_M24C08-RMN6TP_M24C08-RMN6TP_C141777.html **Pins:** - ~{WC} [pin 7] - E2 [pin 3] - NC [pin 1] - NC [pin 2] - SCL [pin 6] - SDA [pin 5] - VCC [pin 8] - VSS [pin 4] ### U4 — [SP485EEN-L](https://www.flux.ai/lcsc/sp485een-l~l844.md) - Manufacturer Part Number: SP485EEN-L - OC_FARNELL: 9387170 - Price: None - SUPPLIER: Exar - MPN: SP485EEN-L - MF: MaxLinear, Inc. - SnapEDA_Link: https://www.snapeda.com/parts/SP485EEN-L/TR/MaxLinear/view-part/?ref=snap - Description_1: SP485E Series 10Mbps 5V Enhanced Low EMI Half Duplex RS-485 Transceiver -NSOIC-8 - OC_NEWARK: 24R0576 - PACKAGE: NSOIC-8 - Package: SOIC-8 Exar - MP: SP485EEN-L/TR - LCSC Part Number: C1543939 - Availability: In Stock - Value: SP485EEN-L - Manufacturer Name: MaxLinear(迈凌) - JLCPCB Part Class: Extended Part - Package or Case Code: SOIC-8_L4.9-W3.9-P1.27-LS6.0-BL - Check_prices: https://www.snapeda.com/parts/SP485EEN-L/TR/MaxLinear/view-part/?ref=eda - Reference: U4 - Footprint: Library_base:SOIC127P600X175-8N - Part Type: Buffers / Drivers **Pins:** - #RE [pin 2] - A [pin 6] - B [pin 7] - DE [pin 3] - DI [pin 4] - GND [pin 5] - RO [pin 1] - VCC [pin 8] ### U5 — [AP22653AW6-7](https://www.flux.ai/lcsc/ap22653aw6-7~wt5p.md) - Package or Case Code: SOT-26_L3.0-W1.6-P0.95-LS2.8-BL - JLCPCB Part Class: Extended Part - Reference: U5 - Datasheet: AP22653AW6-7 - Manufacturer Name: DIODES(美台) - Manufacturer Part Number: AP22653AW6-7 - Part Type: Power Distribution Switches - Footprint: Library_base:IC6_AP22653AW6-7_DIO - LCSC Part Number: C1511768 - Value: AP22653AW6-7 **Pins:** - ~{FAULT} [pin 4] - EN [pin 3] - GND [pin 2] - ILIM [pin 5] - IN [pin 1] - OUT [pin 6] ### U6 — [MC34063AD](https://www.flux.ai/lcsc/mc34063ad~1pjo.md) - Manufacturer Part Number: MC34063AD - JLCPCB Part Class: Extended Part - LCSC Part Number: C118241 - Part Type: DC-DC Converters - Package or Case Code: SOP-8_L4.9-W3.9-P1.27-LS6.0-BL - Reference: U6 - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_HTC-Korea-TAEJIN-Tech-MC34063AD_C118241.pdf - Value: MC34063AD - Datasheet: http://www.onsemi.com/pub_link/Collateral/MC34063A-D.PDF - Manufacturer Name: HTC - Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - Product Info Url: https://lcsc.com/product-detail/DC-DC-Converters_HTC_MC34063AD_MC34063AGD_C118241.html **Pins:** - ComparatorInvertingInput [pin 5] - DriverCollector [pin 8] - GND [pin 4] - IPKSense [pin 7] - SwitchCollector [pin 1] - SwitchEmitter [pin 2] - TimingCapacitor [pin 3] - VCC [pin 6] ### U7 — [AP22653AW6-7](https://www.flux.ai/lcsc/ap22653aw6-7~wt5p.md) - Datasheet: AP22653AW6-7 - JLCPCB Part Class: Extended Part - Package or Case Code: SOT-26_L3.0-W1.6-P0.95-LS2.8-BL - Part Type: Power Distribution Switches - Manufacturer Name: DIODES(美台) - Manufacturer Part Number: AP22653AW6-7 - Footprint: Library_base:IC6_AP22653AW6-7_DIO - Reference: U7 - Value: AP22653AW6-7 - LCSC Part Number: C1511768 **Pins:** - ~{FAULT} [pin 4] - EN [pin 3] - GND [pin 2] - ILIM [pin 5] - IN [pin 1] - OUT [pin 6] ### U8 — [MC34063AD](https://www.flux.ai/lcsc/mc34063ad~1pjo.md) - Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - Datasheet: http://www.onsemi.com/pub_link/Collateral/MC34063A-D.PDF - JLCPCB Part Class: Extended Part - Value: MC34063AD - Manufacturer Part Number: MC34063AD - LCSC Part Number: C118241 - Reference: U8 - Package or Case Code: SOP-8_L4.9-W3.9-P1.27-LS6.0-BL - Part Type: DC-DC Converters - Datasheet URL: https://storage.googleapis.com/graviton-electric-symbols/document_assets/lcsc/2304140030_HTC-Korea-TAEJIN-Tech-MC34063AD_C118241.pdf - Manufacturer Name: HTC - Product Info Url: https://lcsc.com/product-detail/DC-DC-Converters_HTC_MC34063AD_MC34063AGD_C118241.html **Pins:** - ComparatorInvertingInput [pin 5] - DriverCollector [pin 8] - GND [pin 4] - IPKSense [pin 7] - SwitchCollector [pin 1] - SwitchEmitter [pin 2] - TimingCapacitor [pin 3] - VCC [pin 6] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/ryanf/e303-main-controller-o9bp](https://www.flux.ai/ryanf/e303-main-controller-o9bp).* --- *Generated from [https://www.flux.ai/ryanf/e303-main-controller-o9bp](https://www.flux.ai/ryanf/e303-main-controller-o9bp)*