Mechanical Dimensions & Land Pattern (MQFP-128(14x20))
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 MQFP-128(14x20) | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — SCH5127-NW (MQFP-128(14x20))
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of SCH5127-NW (MQFP-128(14x20))?
Manufactured by MICROCHIP, the SCH5127-NW is housed in a MQFP-128(14x20) package with 128 pins and a 0.50 mm lead pitch. Key pins include: 1 (V1_IN: Multiplexed I/O & Peripheral Pin V1_IN (General)), 2 (V2_IN: Multiplexed I/O & Peripheral Pin V2_IN (General)), 3 (VTRIP_IN: Multiplexed I/O & Peripheral Pin VTRIP_IN (General)), 4 (VTR: Multiplexed I/O & Peripheral Pin VTR (General)), 5 (nMTR0: Multiplexed I/O & Peripheral Pin nMTR0 (General)), 6 (nDSKCHG: Multiplexed I/O & Peripheral Pin nDSKCHG (General)).
What are the IPC-7351B PCB Footprint dimensions for SCH5127-NW?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), SCH5127-NW (MQFP-128(14x20)) has a nominal body envelope of 14.00 × 20.00 mm, pitch e = 0.50 mm, and 128 copper pads.
Where can I download KiCad (.kicad_mod, .kicad_sym), Fusion 360 (.lbr), and 3D STEP models for SCH5127-NW?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for SCH5127-NW (MICROCHIP, MQFP-128(14x20)) 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) & SCH5127 Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | V1_IN | Digital_IO | Signal terminal V1_IN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: V1_IN. Supported peripheral buses: General. |
| 2 | V2_IN | Digital_IO | Signal terminal V2_IN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: V2_IN. Supported peripheral buses: General. |
| 3 | VTRIP_IN | Digital_IO | Signal terminal VTRIP_IN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: VTRIP_IN. Supported peripheral buses: General. |
| 4 | VTR | Digital_IO | Signal terminal VTR (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: VTR. Supported peripheral buses: General. |
| 5 | nMTR0 | Digital_IO | Signal terminal nMTR0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nMTR0. Supported peripheral buses: General. |
| 6 | nDSKCHG | Digital_IO | Signal terminal nDSKCHG (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nDSKCHG. Supported peripheral buses: General. |
| 7 | nDS0 | Digital_IO | Signal terminal nDS0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nDS0. Supported peripheral buses: General. |
| 8 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 9 | nDIR | Digital_IO | Signal terminal nDIR (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nDIR. Supported peripheral buses: General. |
| 10 | nSTEP | Digital_IO | Signal terminal nSTEP (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nSTEP. Supported peripheral buses: General. |
| 11 | nWDATA | Digital_IO | Signal terminal nWDATA (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nWDATA. Supported peripheral buses: General. |
| 12 | nWGATE | Digital_IO | Signal terminal nWGATE (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nWGATE. Supported peripheral buses: General. |
| 13 | nHDSEL | Digital_IO | Signal terminal nHDSEL (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nHDSEL. Supported peripheral buses: General. |
| 14 | nINDEX | Digital_IO | Signal terminal nINDEX (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nINDEX. Supported peripheral buses: General. |
| 15 | nTRK0 | Digital_IO | Signal terminal nTRK0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nTRK0. Supported peripheral buses: General. |
| 16 | nWRTPRT | Digital_IO | Signal terminal nWRTPRT (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nWRTPRT. Supported peripheral buses: General. |
| 17 | nRDATA | Digital_IO | Signal terminal nRDATA (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nRDATA. Supported peripheral buses: General. |
| 18 | CLOCKI | Digital_IO | Signal terminal CLOCKI (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: CLOCKI. Supported peripheral buses: General. |
| 19 | LAD0 | Digital_IO | Signal terminal LAD0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LAD0. Supported peripheral buses: General. |
| 20 | LAD1 | Digital_IO | Signal terminal LAD1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LAD1. Supported peripheral buses: General. |
| 21 | LAD2 | Digital_IO | Signal terminal LAD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LAD2. Supported peripheral buses: General. |
| 22 | LAD3 | Digital_IO | Signal terminal LAD3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: LAD3. Supported peripheral buses: General. |
| 23 | nLFRAME | Digital_IO | Signal terminal nLFRAME (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nLFRAME. Supported peripheral buses: General. |
| 24 | nLDRQ | Digital_IO | Signal terminal nLDRQ (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nLDRQ. Supported peripheral buses: General. |
| 25 | nPCI_RESET | Digital_IO | Active-low hardware reset terminal (nPCI_RESET): pulling this pin Low resets the processor core and peripherals. |
| 26 | PCI_CLK | Digital_IO | Signal terminal PCI_CLK (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PCI_CLK. Supported peripheral buses: General. |
| 27 | SER_IRQ | Digital_IO | Signal terminal SER_IRQ (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: SER_IRQ. Supported peripheral buses: General. |
| 28 | nIDE_RSTDRV/GP10 | Digital_IO | Signal terminal nIDE_RSTDRV/GP10 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nIDE_RSTDRV/GP10. Supported peripheral buses: General. |
| 29 | VTR | Digital_IO | Signal terminal VTR (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: VTR. Supported peripheral buses: General. |
| 30 | GP20/SPEAKER_OUT | Digital_IO | Signal terminal GP20/SPEAKER_OUT (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GP20/SPEAKER_OUT. Supported peripheral buses: General. |
| 31 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 32 | VBAT | Power_In | Primary positive power supply input (VBAT) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 33 | nINTRD_IN | Digital_IO | Signal terminal nINTRD_IN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nINTRD_IN. Supported peripheral buses: General. |
| 34 | AVSS | GND | 0V electrical ground return terminal (AVSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 35 | VCC | Power_In | Primary positive power supply input (VCC) operating in the 3.3V / 5.0V Standard Logic domain (Max rating: 5.5V). |
| 36 | GP27/nIO_SMI/P17 | Digital_IO | Signal terminal GP27/nIO_SMI/P17 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GP27/nIO_SMI/P17. Supported peripheral buses: General. |
| 37 | KDAT/GP21 | Digital_IO | Signal terminal KDAT/GP21 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: KDAT/GP21. Supported peripheral buses: General. |
| 38 | KCLK/GP22 | Digital_IO | Signal terminal KCLK/GP22 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: KCLK/GP22. Supported peripheral buses: General. |
| 39 | MDAT/GP32 | Digital_IO | Signal terminal MDAT/GP32 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: MDAT/GP32. Supported peripheral buses: General. |
| 40 | MCLK/GP33 | Digital_IO | Signal terminal MCLK/GP33 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: MCLK/GP33. Supported peripheral buses: General. |
| 41 | GP36/nKBDRST | Digital_IO | Signal terminal GP36/nKBDRST (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GP36/nKBDRST. Supported peripheral buses: General. |
| 42 | GP37/A20M | Digital_IO | Signal terminal GP37/A20M (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: GP37/A20M. Supported peripheral buses: General. |
| 43 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 44 | VTR | Digital_IO | Signal terminal VTR (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: VTR. Supported peripheral buses: General. |
| 45 | nINIT | Digital_IO | Signal terminal nINIT (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nINIT. Supported peripheral buses: General. |
| 46 | nSLCTIN | Digital_IO | Signal terminal nSLCTIN (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nSLCTIN. Supported peripheral buses: General. |
| 47 | PD0 | Digital_IO | Signal terminal PD0 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD0. Supported peripheral buses: General. |
| 48 | PD1 | Digital_IO | Signal terminal PD1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD1. Supported peripheral buses: General. |
| 49 | PD2 | Digital_IO | Signal terminal PD2 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD2. Supported peripheral buses: General. |
| 50 | PD3 | Digital_IO | Signal terminal PD3 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD3. Supported peripheral buses: General. |
| 51 | PD4 | Digital_IO | Signal terminal PD4 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD4. Supported peripheral buses: General. |
| 52 | PD5 | Digital_IO | Signal terminal PD5 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD5. Supported peripheral buses: General. |
| 53 | PD6 | Digital_IO | Signal terminal PD6 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD6. Supported peripheral buses: General. |
| 54 | PD7 | Digital_IO | Signal terminal PD7 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PD7. Supported peripheral buses: General. |
| 55 | VSS | GND | 0V electrical ground return terminal (VSS) for internal core logic, I/O drivers, and analog sub-blocks. |
| 56 | SLCT | Digital_IO | Signal terminal SLCT (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: SLCT. Supported peripheral buses: General. |
| 57 | PE | Digital_IO | Signal terminal PE (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: PE. Supported peripheral buses: General. |
| 58 | BUSY | Digital_IO | Signal terminal BUSY (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: BUSY. Supported peripheral buses: General. |
| 59 | nACK | Digital_IO | Signal terminal nACK (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nACK. Supported peripheral buses: General. |
| 60 | nERROR | Digital_IO | Signal terminal nERROR (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nERROR. Supported peripheral buses: General. |
| 61 | nALF | Digital_IO | Signal terminal nALF (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nALF. Supported peripheral buses: General. |
| 62 | nSTROBE | Digital_IO | Signal terminal nSTROBE (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nSTROBE. Supported peripheral buses: General. |
| 63 | nRI1 | Digital_IO | Signal terminal nRI1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nRI1. Supported peripheral buses: General. |
| 64 | nDCD1 | Digital_IO | Signal terminal nDCD1 (I/O, 3.3V / 5.0V Standard Logic domain). Multiplexed alternate functions: nDCD1. Supported peripheral buses: General. |




