Mechanical Dimensions & Land Pattern (QFN-48-EP(7x7))
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 QFN-48-EP(7x7) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — KSZ9031RNXCA-TR (QFN-48-EP(7x7))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of KSZ9031RNXCA-TR (QFN-48-EP(7x7))?
Manufactured by MICROCHIP, the KSZ9031RNXCA-TR is housed in a QFN-48-EP(7x7) package with 49 pins and a 0.50 mm lead pitch. Key pins include: 1 (AVDDH: Power Supply Input (AVDDH — 3.3V / 5.0V Standard Logic)), 2 (TXRXP_A: Multiplexed I/O & Peripheral Pin TXRXP_A (General)), 3 (TXRXM_A: Multiplexed I/O & Peripheral Pin TXRXM_A (General)), 4 (AVDDL: Power Supply Input (AVDDL — 3.3V / 5.0V Standard Logic)), 5 (TXRXP_B: Multiplexed I/O & Peripheral Pin TXRXP_B (General)), 6 (TXRXM_B: Multiplexed I/O & Peripheral Pin TXRXM_B (General)).
What are the IPC-7351B PCB Footprint dimensions for KSZ9031RNXCA-TR?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), KSZ9031RNXCA-TR (QFN-48-EP(7x7)) has a nominal body envelope of 7.00 × 7.00 mm, pitch e = 0.50 mm, and 49 copper pads plus a central exposed thermal pad (EPAD) of 5.10 × 5.10 mm with a 60% IPC-7525 windowed solder paste grid.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for KSZ9031RNXCA-TR?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for KSZ9031RNXCA-TR (MICROCHIP, QFN-48-EP(7x7)) 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 (49 pins) & KSZ9031 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | AVDDH | Power_In | Primary positive power supply input (AVDDH) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 2 | TXRXP_A | Digital_IO | Signal terminal TXRXP_A (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXP_A. Supported peripheral buses: General. |
| 3 | TXRXM_A | Digital_IO | Signal terminal TXRXM_A (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXM_A. Supported peripheral buses: General. |
| 4 | AVDDL | Power_In | Primary positive power supply input (AVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 5 | TXRXP_B | Digital_IO | Signal terminal TXRXP_B (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXP_B. Supported peripheral buses: General. |
| 6 | TXRXM_B | Digital_IO | Signal terminal TXRXM_B (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXM_B. Supported peripheral buses: General. |
| 7 | TXRXP_C | Digital_IO | Signal terminal TXRXP_C (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXP_C. Supported peripheral buses: General. |
| 8 | TXRXM_C | Digital_IO | Signal terminal TXRXM_C (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXM_C. Supported peripheral buses: General. |
| 9 | AVDDL | Power_In | Primary positive power supply input (AVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 10 | TXRXP_D | Digital_IO | Signal terminal TXRXP_D (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXP_D. Supported peripheral buses: General. |
| 11 | TXRXM_D | Digital_IO | Signal terminal TXRXM_D (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXRXM_D. Supported peripheral buses: General. |
| 12 | AVDDH | Power_In | Primary positive power supply input (AVDDH) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 13 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 14 | DVDDL | Power_In | Primary positive power supply input (DVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 15 | LED2/ PHYAD1 | Digital_IO | Signal terminal LED2/ PHYAD1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LED2/ PHYAD1. Supported peripheral buses: General. |
| 16 | DVDDH | Power_In | Primary positive power supply input (DVDDH) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 17 | LED1/ PHYAD0/ PME_N1 | Open_Drain | Signal terminal LED1/ PHYAD0/ PME_N1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LED1/ PHYAD0/ PME_N1. Supported peripheral buses: General. |
| 18 | DVDDL | Power_In | Primary positive power supply input (DVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 19 | TXD0 | Digital_IO | Signal terminal TXD0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXD0. Supported peripheral buses: UART. |
| 20 | TXD1 | Digital_IO | Signal terminal TXD1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXD1. Supported peripheral buses: UART. |
| 21 | TXD2 | Digital_IO | Signal terminal TXD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXD2. Supported peripheral buses: UART. |
| 22 | TXD3 | Digital_IO | Signal terminal TXD3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TXD3. Supported peripheral buses: UART. |
| 23 | DVDDL | Power_In | Primary positive power supply input (DVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 24 | GTX_CLK | Digital_IO | Signal terminal GTX_CLK (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GTX_CLK. Supported peripheral buses: General. |
| 25 | TX_EN | Digital_IO | Signal terminal TX_EN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: TX_EN. Supported peripheral buses: General. |
| 26 | DVDDL | Power_In | Primary positive power supply input (DVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 27 | RXD3/ MODE3 | Digital_IO | Signal terminal RXD3/ MODE3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD3/ MODE3. Supported peripheral buses: UART. |
| 28 | RXD2/ MODE2 | Digital_IO | Signal terminal RXD2/ MODE2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD2/ MODE2. Supported peripheral buses: UART. |
| 29 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 30 | DVDDL | Power_In | Primary positive power supply input (DVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 31 | RXD1/ MODE1 | Digital_IO | Signal terminal RXD1/ MODE1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD1/ MODE1. Supported peripheral buses: UART. |
| 32 | RXD0/ MODE0 | Digital_IO | Signal terminal RXD0/ MODE0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RXD0/ MODE0. Supported peripheral buses: UART. |
| 33 | CLK125_EN | Digital_IO | Signal terminal CLK125_EN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: CLK125_EN. Supported peripheral buses: General. |
| 34 | DVDDH | Power_In | Primary positive power supply input (DVDDH) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 35 | RX CLK/_ PHYAD2 | Digital_IO | Signal terminal RX CLK/_ PHYAD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: RX CLK/_ PHYAD2. Supported peripheral buses: General. |
| 36 | MDC | Digital_IO | Signal terminal MDC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: MDC. Supported peripheral buses: General. |
| 37 | MDIO | Digital_IO | Signal terminal MDIO (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: MDIO. Supported peripheral buses: General. |
| 38 | INT N/_ PME_N2 | Open_Drain | Signal terminal INT N/_ PME_N2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: INT N/_ PME_N2. Supported peripheral buses: General. |
| 39 | DVDDL | Power_In | Primary positive power supply input (DVDDL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 40 | DVDDH | Power_In | Primary positive power supply input (DVDDH) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 41 | LED_MODE | Digital_IO | Signal terminal LED_MODE (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LED_MODE. Supported peripheral buses: General. |
| 42 | RESET_N | Digital_IO | Active-low hardware reset terminal (RESET_N): pulling this pin Low resets the processor core and peripherals. |
| 43 | LDO_O | Digital_IO | Signal terminal LDO_O (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LDO_O. Supported peripheral buses: General. |
| 44 | AVDDL_PLL | Power_In | Primary positive power supply input (AVDDL_PLL) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 45 | XO | Digital_IO | Signal terminal XO (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XO. Supported peripheral buses: RTC/CLK. |
| 46 | XI | Digital_IO | Signal terminal XI (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: XI. Supported peripheral buses: RTC/CLK. |
| 47 | NC | NC | Signal terminal NC (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: NC. Supported peripheral buses: General. |
| 48 | ISET | Digital_IO | Signal terminal ISET (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: ISET. Supported peripheral buses: General. |
| 49 | EP | GND | Bottom exposed die attach pad (EP) providing primary thermal conduction path to the PCB and low-inductance 0V ground return. |












