4 layers55 × 73.5 mm
2 layers73.8 × 31.1 mm
Ch375serial
ChartreuseK/ch375serial4CH375-Serial Adapter
- Size
- 73.8 × 31.1 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 37
- Nets
- 52
- Pads
- 123
- Tracks, vias
- 186, 58
- Pours
- 94
- Routed
- Yes
- KiCad
- KiCad 8.0 (file 20240108)
- Created
- 17 Jul 2024
- Updated
- 17 Jul 2024
Overview
Ch375serial is an open-source printed circuit board by ChartreuseK, from the ChartreuseK/ch375serial repository on GitHub, published under the CERN-OHL-W-2.0 licence. It is a 2-layer board of 73.8 × 31.1 mm with 37 parts on 52 nets, routed with 186 tracks and 58 vias.
It is built around the MAX3232ID and IP4234CZ6. Its parts include 13 capacitors, 3 ICs, 3 connectors, 2 resistors and 1 diode. It belongs with the interfaces and adapters boards of this library.
Main components
2
MAX3232ID
SOIC-16-40℃~+85℃ 2 2 250Kbps 300uA 3V~5.5V Short-Circuit Protection Transceiver Yes ±15kV SOIC-16 RS232 ICs ROHSTexas InstrumentsRS232 ICs
IP4234CZ6
TSOP-6-40℃~+85℃@(Ta) 100W 100nA 3.1pF 5.5V 6V ESD Four channels IEC 61000-4-2、IEC 61000-4-5 TSOP-6 ESD and Surge Protection (TVS/ESD) ROHSNexperiaESD And Surge Protection (TVS/ESD)
README
README.mdCH375 to RS-232 Adapter
This adapter is designed to allow usb mass storage media to be accessible to a computer over standard RS232. As such it contains a CH375 to do the heavy lifting along with a MAX3232 rs-232 level shifter to drive full serial levels. An external regulated 5v source is required to power the device as well as any attached USB storage devices. This could be provided by a USB to barrel jack adapter with a cell phone charger, a stand alone switching wall supply, or possibly even by a ps/2 keyboard port tap that borrows some power from such a port.
This is still in the testing stage and has not yet been constructed, however the circuitry is heavilly based on the original datasheet examples so likely will work.
Parts
37| Qty | Value | Footprint | References |
|---|---|---|---|
| 8 | 0.1µF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C2, C3, C4, C5, C6, C7, C13 |
| 6 | TestPoint | TestPoint:TestPoint_Pad_D1.0mm | TP5, TP6, TP7, TP8, TP9, TP10 |
| 2 | 100µF | Capacitor_SMD:CP_Elec_6.3x5.9 | C11, C12 |
| 2 | 20pF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C8, C9 |
| 2 | SolderJumper_2_Bridged | Jumper:SolderJumper-2_P1.3mm_Bridged_RoundedPad1.0x1.5mm | JP3, JP4 |
| 2 | SolderJumper_2_Open | Jumper:SolderJumper-2_P1.3mm_Open_RoundedPad1.0x1.5mm | JP1, JP2 |
| 1 | 0.47µF | Capacitor_SMD:C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C10 |
| 1 | 12MHz | Crystal:Crystal_HC49-4H_Vertical | Y1 |
| 1 | 1k | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1 |
| 1 | 4k7 | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R3 |
| 1 | Barrel_Jack_MountingPin | Connector_BarrelJack:BarrelJack_Horizontal | J3 |
| 1 | CH375 | Package_SO:SOP-28_8.4x18.16mm_P1.27mm | U1 |
| 1 | DE9_Receptacle_MountingHoles | Connector_Dsub:DSUB-9_Female_Horizontal_P2.77x2.84mm_EdgePinOffset7.70mm_Housed_MountingHolesOffset9.12mm | J2 |
| 1 | FerriteBead_Small | Inductor_SMD:L_0805_2012Metric_Pad1.15x1.40mm_HandSolder | FB1 |
| 1 | IP4234CZ6 | Package_TO_SOT_SMD:SC-74-6_1.55x2.9mm_P0.95mm | U3 |
| 1 | LED | LED_THT:LED_D3.0mm | D1 |
| 1 | LOGO | custom:kitlogo | G*** |
| 1 | MAX3232 | Package_SO:SOIC-16_3.9x9.9mm_P1.27mm | U2 |
| 1 | MountingHole | MountingHole:MountingHole_2.2mm_M2 | H1 |
| 1 | Polyfuse 500mA | Resistor_SMD:R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | F1 |
| 1 | USB_A | Connector_USB:USB_A_Molex_67643_Horizontal | J1 |
Questions
How big is the Ch375serial PCB?
It measures 73.8 × 31.1 mm and has 2 copper layers, 1.6 mm thick.
What parts does the Ch375serial use?
37 parts, built around the MAX3232ID and IP4234CZ6. 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 Ch375serial KiCad files?
From the ChartreuseK/ch375serial repository on GitHub, at the commit this page was made from: the board is CH375_Serial.kicad_pcb and its schematic CH375_Serial.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the Ch375serial design in my own project?
Its repository publishes it under the CERN-OHL-W-2.0 licence: you may reuse it on that licence's terms (keep the author's notice, and for a copyleft licence share your changes alike).
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