Mechanical Dimensions & Land Pattern (LQFP-128(14x14))
Extracted from Datasheet & IPC-7351B NormalizedPackage Body (D × E)Nominal
14.00 × 14.00 mm
Height (A) & Pitch (e)IPC-7351B
A=1.60mm · e=0.40mm
Pad Size (W × L)Level B
0.24 × 1.25 mm
Pins / Total PadsTopology
128P / 128Pad (QUAD_ROW)
Recommended 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 LQFP-128(14x14) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — CH395P (LQFP-128(14x14))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of CH395P (LQFP-128(14x14))?
Manufactured by WCH, the CH395P is housed in a LQFP-128(14x14) package with 128 pins and a 0.40 mm lead pitch. Key pins include: 1 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 2 (GND: Ground Reference Pin (GND)), 3 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 4 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 5 (NC: Multiplexed I/O & Peripheral Pin NC (General)), 6 (NC: Multiplexed I/O & Peripheral Pin NC (General)).
What are the IPC-7351B PCB Footprint dimensions for CH395P?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), CH395P (LQFP-128(14x14)) has a nominal body envelope of 14.00 × 14.00 mm, pitch e = 0.40 mm, and 128 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for CH395P?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for CH395P (WCH, LQFP-128(14x14)) 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 (128 pins) & CH395 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic 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 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 4 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 5 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 6 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 7 | VCC33 | Power_In | Primary positive power supply input (VCC33) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 8 | IO0 | Digital_IO | GPIO0 / RTC_GPIO0 (Chip Boot Mode Strapping Pin) |
| 9 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 10 | RXP | Digital_IO | Signal terminal RXP (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXP. Supported peripheral buses: General. |
| 11 | RXN | Digital_IO | Signal terminal RXN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXN. Supported peripheral buses: General. |
| 12 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 13 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 14 | TXP | Digital_IO | Signal terminal TXP (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXP. Supported peripheral buses: General. |
| 15 | TXN | Digital_IO | Signal terminal TXN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXN. Supported peripheral buses: General. |
| 16 | IO18 | Digital_IO | GPIO18 / RTC_GPIO18 / U1RXD / ADC2_CH7 / CLK_OUT3 |
| 17 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 18 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 19 | XI | Digital_IO | Signal terminal XI (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XI. Supported peripheral buses: RTC/CLK. |
| 20 | XO | Digital_IO | Signal terminal XO (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XO. Supported peripheral buses: RTC/CLK. |
| 21 | IO10 | Digital_IO | GPIO10 / RTC_GPIO10 / TOUCH10 / ADC1_CH9 / FSPICS0 |
| 22 | IO11 | Digital_IO | GPIO11 / RTC_GPIO11 / TOUCH11 / ADC2_CH0 / FSPID |
| 23 | IO12 | Digital_IO | GPIO12 / RTC_GPIO12 / TOUCH12 / ADC2_CH1 / FSPICLK |
| 24 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 25 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 26 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 27 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 28 | VDDK | Power_In | Primary positive power supply input (VDDK) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 29 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 30 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 31 | SDI/D6 SDO/RTS/D7 | Digital_IO | Signal terminal SDI/D6 SDO/RTS/D7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: SDI/D6 SDO/RTS/D7. Supported peripheral buses: UART. |
| 32 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 33 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 34 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 35 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 36 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 37 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 38 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 39 | VCCIO | Power_In | Primary positive power supply input (VCCIO) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 40 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 41 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 42 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 43 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 44 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 45 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 46 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 47 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 48 | GPIO0 | Digital_IO | Signal terminal GPIO0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO0. Supported peripheral buses: General. |
| 49 | GPIO1 | Digital_IO | Signal terminal GPIO1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO1. Supported peripheral buses: General. |
| 50 | GPIO2 | Digital_IO | Signal terminal GPIO2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO2. Supported peripheral buses: General. |
| 51 | GPIO3/RDY# | Digital_IO | Signal terminal GPIO3/RDY# (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO3/RDY#. Supported peripheral buses: General. |
| 52 | RST | Digital_IO | Signal terminal RST (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RST. Supported peripheral buses: General. |
| 53 | SEL | Digital_IO | Signal terminal SEL (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: SEL. Supported peripheral buses: General. |
| 54 | VDDK | Power_In | Primary positive power supply input (VDDK) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 55 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 56 | VCCIO | Power_In | Primary positive power supply input (VCCIO) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 57 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 58 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 59 | GPIO4 | Digital_IO | Signal terminal GPIO4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO4. Supported peripheral buses: General. |
| 60 | GPIO5 | Digital_IO | Signal terminal GPIO5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO5. Supported peripheral buses: General. |
| 61 | GPIO6 | Digital_IO | Signal terminal GPIO6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO6. Supported peripheral buses: General. |
| 62 | GPIO7 | Digital_IO | Signal terminal GPIO7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GPIO7. Supported peripheral buses: General. |
| 63 | RSTI | Digital_IO | Signal terminal RSTI (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RSTI. Supported peripheral buses: General. |
| 64 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |