
MR25H40MDF
Everspin TechExtended
4Mbit MRAM SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHS
- Part id
- everspin-tech/MR25H40MDF
- Category
- Random Access Memory (RAM)
- Package
- DFN-8-EP(5x6)
- Pins
- 9
- In stock
- 0 at JLCPCB (C17645863)
- Used on
- 11 open-source boards
Overview
The MR25H40MDF is a random Access Memory made by Everspin Tech in a DFN-8-EP(5x6) package with 9 pins. 4Mbit MRAM SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHS.
PCBKit's library has its KiCad symbol (Memory_NVRAM:MR25H40, from KiCad's library) and its footprint (EasyEDA_Cloud:DFN-8_L5.0-W6.0-P1.27-BL-EP, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C17645863). 11 open-source boards in 7 repositories on GitHub use it.
Symbol
Footprint
Pinout
9| Pin | Name | Type |
|---|---|---|
| 1 | CS | Input |
| 2 | SO | Output |
| 3 | WP | Input |
| 4 | VSS | Power in |
| 5 | SI | Input |
| 6 | SCK | Input |
| 7 | HOLD | Input |
| 8 | VDD | Power in |
| 9 | PAD | Power in |
- 4 layers90.2 × 95.9 mm

- 4 layers90.2 × 95.9 mm

ADCS board
onionharvester/boardwalk
A little gathering place for my PCBs. This is their favourite hangout spot! 🪼⋆.ೃ࿔*:・
205 parts55 - 4 layers90.2 × 95.9 mm

- 4 layers90.2 × 95.9 mm

Mainboard v05
alxklso/ISP-cubesat
This is the repo for the Isomer Space Program (ISP) 1U CoyoteSat CubeSat mission.
255 parts1MIT - 4 layers90.2 × 95.9 mm

- 4 layers90.2 × 95.9 mm

Mainboard v06b samwise
pete4radio/SAMWISE-1-1-HW-Training
PCBs fabbed in May 2024 for SAMWISE
204 parts - 4 layers90.2 × 95.9 mm

ADCS board
pete4radio/SAMWISE-1-2-HW-Training
SAMWISE boards existing or newly ordered March 2025
197 parts - 4 layers90.2 × 95.9 mm

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Questions
Is there a KiCad symbol and footprint for the MR25H40MDF?
Yes. The symbol is Memory_NVRAM:MR25H40 and the footprint EasyEDA_Cloud:DFN-8_L5.0-W6.0-P1.27-BL-EP, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the MR25H40MDF?
DFN-8-EP(5x6), with 9 pins. Its footprint is drawn on this page.
Where is the MR25H40MDF datasheet?
Everspin Tech publishes it: the Datasheet link on this page opens it.
Where can I order the MR25H40MDF?
JLCPCB lists it as part C17645863, with 0 in stock; the sellers' links on this page open their listings.
What can replace the MR25H40MDF?
Parts like it in the library: the MR25H10CDFR by Everspin Tech, the MR20H40CDF by Everspin Tech, the MR25H256AMDF by Everspin Tech and the MR25H256CDF by Everspin Tech. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MR25H40MDF?
11 boards in 7 repositories on GitHub; the most starred are listed on this page, with their KiCad files.