4 layers46.1 × 45.6 mm
Avionics mainboard
AFS-pt/PROMETHEUS-1
Documentation lives here: https://afs-pt.github.io/PROMETHEUS-1
202 parts15
Overview
The MR25H40DF is a random Access Memory made by Everspin Tech in a DFN-8-EP(5x6) package with 9 pins. 0℃~+70℃ 4Mbit 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:W-PDFN-8_L6.0-W5.0-P1.27-TL-EP3.0, from EasyEDA), ready for a KiCad board. JLCPCB lists it (part C17228426). 10 open-source boards in 5 repositories on GitHub use it.
Symbol
Footprint
Parameters
4- Features
- Software write protection function, Block protection function, Write protection function, Write enable latch function, Hardware write protection function, Power-up/power-down/under-voltage data protection function
- Interface
- SPI
- Memory Size
- 4Mbit
- Operating Temperature
- 0℃~+70℃
Order codes
1- MR25H40DFLCSC C17228426
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 |
Open-source boards using it
All 10- 4 layers92 × 92 mm
- 4 layers92 × 88.9 mm
Cubesat obc
ephemeridis/cubesat_obc
A small CubeSat On-Board Computer with lots of processing headroom, utilizing a low power ARM Cortex M33 processor at its core.
311 parts2MIT - 6 layers111.8 × 111.8 mm
- 2 layers94 × 51 mm
- 4 layers92 × 92 mm
- 4 layers72.5 × 104.5 mm
- 4 layers72.5 × 104.5 mm
Show this part on your page
<iframe src="https://pcbkit.io/embed/parts/everspin-tech/MR25H40DF" title="MR25H40DF in PCBKit" width="100%" height="480" style="border:0;border-radius:12px" allow="fullscreen" loading="lazy"></iframe><img src="https://pcbkit.io/embed/parts/everspin-tech/MR25H40DF.jpg" alt="MR25H40DF" width="1200" height="900">[](https://pcbkit.io/parts/everspin-tech/MR25H40DF)Questions
Is there a KiCad symbol and footprint for the MR25H40DF?
Yes. The symbol is Memory_NVRAM:MR25H40 and the footprint EasyEDA_Cloud:W-PDFN-8_L6.0-W5.0-P1.27-TL-EP3.0, both drawn on this page. PCBKit places them on a board for you when you design with it.
What package is the MR25H40DF?
DFN-8-EP(5x6), with 9 pins. Its footprint is drawn on this page.
Where is the MR25H40DF datasheet?
Everspin Tech publishes it: the Datasheet link on this page opens it.
Where can I order the MR25H40DF?
JLCPCB lists it as part C17228426, with 0 in stock; the sellers' links on this page open their listings.
What can replace the MR25H40DF?
Parts like it in the library: the MR25H10MDF by Everspin Tech, the MR20H40CDFR by Everspin Tech, the MR25H128ACDF by Everspin Tech and the MR25H128ACDFR by Everspin Tech. Check their datasheets: a part that fits the footprint may still differ in its ratings.
Which open-source boards use the MR25H40DF?
10 boards in 5 repositories on GitHub; the most starred are listed on this page, with their KiCad files.
Parts like it
8
MR25H10MDF
DFN-8-EP(5x6)1Mbit MRAM SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR20H40CDFR
DFN-8-EP(5x6)4Mbit MRAM SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR25H128ACDF
DFN-8-EP(5x6)-40℃~+85℃ 128Kbit SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR25H128ACDFR
DFN-8-EP(5x6)-40℃~+85℃ 128Kbit SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR25H128AMDF
DFN-8-EP(5x6)-40℃~+125℃ 128Kbit SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR25H256AMDFR
DFN-8-EP(5x6)-40℃~+125℃ 256Kbit MRAM SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR25H256APDFR
DFN-8-EP(5x6)-40℃~+85℃ 256Kbit SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)MR25H40DFR
DFN-8-EP(5x6)0℃~+70℃ 4Mbit SPI DFN-8-EP(5x6) Random Access Memory (RAM) ROHSEverspin TechRandom Access Memory (RAM)