Mechanical Dimensions & Land Pattern (SOP-18-300mil)
Extracted from Datasheet & IPC-7351B NormalizedRecommended Companion BOM & Drop-In Equivalents
Passive external components per reference schematic and 1:1 pin-compatible alternatives| Designator / Replacement MPN | Value / Package | Function & PCB Layout Rule |
|---|---|---|
| N/A BOM | Per application circuit SOP-18-300mil | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — CH315H (SOP-18-300mil)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of CH315H (SOP-18-300mil)?
Manufactured by WCH, the CH315H is housed in a SOP-18-300mil package with 18 pins and a 1.27 mm lead pitch, supporting a VCC supply range of 3.3V to 5V. Key pins include: 1 (NC .: Multiplexed I/O & Peripheral Pin NC . (General)), 2 (GND: Ground Reference Pin (GND)), 3 (UP#: Multiplexed I/O & Peripheral Pin UP# (General)), 4 (LSI#: Multiplexed I/O & Peripheral Pin LSI# (USB)), 5 (LSO#: Multiplexed I/O & Peripheral Pin LSO# (USB)), 6 (VCC: Power Supply Input (VCC — 3.3V to 5V)).
What are the IPC-7351B PCB Footprint dimensions for CH315H?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), CH315H (SOP-18-300mil) has a nominal body envelope of 7.50 × 11.55 mm, pitch e = 1.27 mm, and 18 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for CH315H?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for CH315H (WCH, SOP-18-300mil) directly on this page, including KiCad 8 Footprints (.kicad_mod), Schematic Symbols (.kicad_sym), Autodesk Fusion 360 / Eagle (.lbr), and 3D STEP AP214 / WebGL GLB models.
Static Reference Appendix: Pinout Table (18 pins) & CH315 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | NC . | Digital_IO | Signal terminal NC . (I/O, 3.3V to 5V domain). Multiplexed alternate functions: NC .. Supported peripheral buses: General. |
| 2 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 3 | UP# | Digital_IO | Signal terminal UP# (I/O, 3.3V to 5V domain). Multiplexed alternate functions: UP#. Supported peripheral buses: General. |
| 4 | LSI# | Digital_IO | Signal terminal LSI# (I/O, 3.3V to 5V domain). Multiplexed alternate functions: LSI#. Supported peripheral buses: USB. |
| 5 | LSO# | Digital_IO | Signal terminal LSO# (I/O, 3.3V to 5V domain). Multiplexed alternate functions: LSO#. Supported peripheral buses: USB. |
| 6 | VCC | Power_In | Primary positive power supply input (VCC) operating in the 3.3V to 5V domain (Max rating: 5.0V). |
| 7 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 8 | V3 | Power_Out | Regulated power output rail (V3) operating in the 3.3V to 5V domain (Max rating: 5.0V). |
| 9 | REF | Digital_IO | Signal terminal REF (I/O, 3.3V to 5V domain). Multiplexed alternate functions: REF. Supported peripheral buses: General. |
| 10 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 11 | VCC | Power_In | Primary positive power supply input (VCC) operating in the 3.3V to 5V domain (Max rating: 5.0V). |
| 12 | UP# | Digital_IO | Signal terminal UP# (I/O, 3.3V to 5V domain). Multiplexed alternate functions: UP#. Supported peripheral buses: General. |
| 13 | VCC | Power_In | Primary positive power supply input (VCC) operating in the 3.3V to 5V domain (Max rating: 5.0V). |
| 14 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 15 | OPIN | Digital_IO | Signal terminal OPIN (I/O, 3.3V to 5V domain). Multiplexed alternate functions: OPIN. Supported peripheral buses: General. |
| 16 | VCC | Power_In | Primary positive power supply input (VCC) operating in the 3.3V to 5V domain (Max rating: 5.0V). |
| 17 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 18 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |