Mechanical Dimensions & Land Pattern (SMD-12P)
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 SMD-12P | Size power & signal trace widths for rated load current following IPC-2221 clearance rules. |
Technical Frequently Asked Questions (FAQ) — MRF89XAM9AT-I/RM (SMD-12P)
Quick answers covering Pinout, IPC-7351B Land Pattern dimensions, and CAD export formatsWhat is the Pinout and operating voltage specification of MRF89XAM9AT-I/RM (SMD-12P)?
Manufactured by MICROCHIP, the MRF89XAM9AT-I/RM is housed in a SMD-12P package with 12 pins and a 0.50 mm lead pitch, supporting a VCC supply range of 2.1–3.6V. Key pins include: 1 (GND: Ground Reference Pin (GND)), 2 (RESET: System Enable & Hardware Reset (RESET)), 3 (CSCON: Multiplexed I/O & Peripheral Pin CSCON (General)), 4 (IRQ0: Multiplexed I/O & Peripheral Pin IRQ0 (General)), 5 (SDI: Multiplexed I/O & Peripheral Pin SDI (General)), 6 (SCK: Multiplexed I/O & Peripheral Pin SCK (SPI)).
What are the IPC-7351B PCB Footprint dimensions for MRF89XAM9AT-I/RM?
Normalized from the official datasheet mechanical drawing per IPC-7351B (Density Level B Nominal), MRF89XAM9AT-I/RM (SMD-12P) has a nominal body envelope of 17.80 × 28.00 mm, pitch e = 0.50 mm, and 12 copper pads plus a central exposed thermal pad (EPAD) of 19.78 × 14.70 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 MRF89XAM9AT-I/RM?
You can download the verified open-hardware (CERN-OHL-P-2.0) CAD library bundle for MRF89XAM9AT-I/RM (MICROCHIP, SMD-12P) 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 (12 pins) & MRF89XAM9AT Family VariantsExpand static table
| Pin # | Signal Name | Electrical Type | Functional Description & Design Notes |
|---|---|---|---|
| 1 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 2 | RESET | Digital_IO | Active-low hardware reset terminal (RESET): pulling this pin Low resets the processor core and peripherals. |
| 3 | CSCON | Digital_IO | Signal terminal CSCON (I/O, 2.1–3.6V domain). Multiplexed alternate functions: CSCON. Supported peripheral buses: General. |
| 4 | IRQ0 | Digital_IO | Signal terminal IRQ0 (I/O, 2.1–3.6V domain). Multiplexed alternate functions: IRQ0. Supported peripheral buses: General. |
| 5 | SDI | Digital_IO | Signal terminal SDI (I/O, 2.1–3.6V domain). Multiplexed alternate functions: SDI. Supported peripheral buses: General. |
| 6 | SCK | Digital_IO | Signal terminal SCK (I/O, 2.1–3.6V domain). Multiplexed alternate functions: SCK. Supported peripheral buses: SPI. |
| 7 | SDO | Digital_IO | Signal terminal SDO (I/O, 2.1–3.6V domain). Multiplexed alternate functions: SDO. Supported peripheral buses: General. |
| 8 | CSDATA | Digital_IO | Signal terminal CSDATA (I/O, 2.1–3.6V domain). Multiplexed alternate functions: CSDATA. Supported peripheral buses: General. |
| 9 | IRQ1 | Digital_IO | Signal terminal IRQ1 (I/O, 2.1–3.6V domain). Multiplexed alternate functions: IRQ1. Supported peripheral buses: General. |
| 10 | Vin | Power_In | Primary positive power supply input (Vin) operating in the 2.1–3.6V domain (Max rating: 3.6V). |
| 11 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |
| 12 | GND | GND | 0V electrical ground return terminal (GND) for internal core logic, I/O drivers, and analog sub-blocks. |