I'm looking at this RAM: https://gr.mouser.com/ProductDetail/Ramxeed/MB85R4M2TFN-G-JAE2?qs=sGAEpiMZZMs6Aik9Fp479ij4Y1Ujk4wm%252B7sI6f6xMBM%3D
How big diameter are the pins of this RAM? Can I stick it on a breadboard?
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5 
- \$\begingroup\$ You seem to be wanting to connect a 4Mbit or 256Kbitx16 FRAM that costs about $20 to something. $20 buys you a 480 MHz MCU board with debugger and Ethernet, with the MCU having 2 MBytes flash and 1 Mbyte of RAM. Why do you want to use this FRAM and with what? Some boards can take USB sticks or SD cards for gigabytes of storage. \$\endgroup\$Justme– Justme2025-06-14 20:41:26 +00:00Commented Jun 14 at 20:41
- \$\begingroup\$ I want to do this as a project.You are correct that it doesn't have any practical value... \$\endgroup\$Whiter Fox– Whiter Fox2025-06-14 23:19:05 +00:00Commented Jun 14 at 23:19
- \$\begingroup\$ You might be better off with something like a DS1250 which is battery backed sram and comes in a DIP package (breadboard friendly). Was there a specific reason you need FRAM? Do you need non-volatile storage? \$\endgroup\$Kartman– Kartman2025-06-15 00:13:34 +00:00Commented Jun 15 at 0:13
- \$\begingroup\$ Well permanent storage devices are a lot bigger and slower and more expensive.Thats why in a computer there is memory hierarchy. \$\endgroup\$Whiter Fox– Whiter Fox2025-06-15 13:35:30 +00:00Commented Jun 15 at 13:35
- \$\begingroup\$ @WhiterFox what you’ve said isn’t necessarily correct in all cases. You’ve told us little about your application and what you have told us suggests you’ve chosen the wrong device for the wrong reasons. \$\endgroup\$Kartman– Kartman2025-06-15 14:18:47 +00:00Commented Jun 15 at 14:18
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4 The datasheet shows the MB85R4M2TFN-G-JAE2 F-RAM 4Mbit FeRAM (256k x16) parallel interface is provided in a 44-pin plastic TSOP package with:
- Lead pitch : 0.8 mm
- Lead shape : Gullwing
- Lead width : 0.25～0.40 mm
As a result, I doubt it can be directly placed in a breadboard. All the breadboards I have seen have a lead pitch of 2.5 mm.
If you are able to solder surface mount devices, one possibility is an adapter such as the TSOP-44 (II) to DIP-44 SMT Adapter (0.8 mm pitch, 10.16 mm body). Where once the TSOP device has been soldered to the adapter, the 2.54 mm pitch pins of the adapter would fit in a breadboard:
There are also ZIF socket adapters such as the Dataman DIL44/TSOP44-II ZIF 400mil which avoids the need to solder the TSOP device, but which are more expensive.
- \$\begingroup\$ I don't know soldering and I don't have a soldering device.Can you suggest me something else? \$\endgroup\$Whiter Fox– Whiter Fox2025-06-14 18:38:30 +00:00Commented Jun 14 at 18:38
- \$\begingroup\$ @WhiterFox What were you planning to use to interface with the B85R4M2TFN-G-JAE2 once it is fitted to a breadboard? The answer to that may allow a more focused selection of alternative devices. E.g. could you use a FRAM device with a SPI or SCL interface rather than a 262,144 words × 16 bits array with separate address and data buses? \$\endgroup\$Chester Gillon– Chester Gillon2025-06-14 19:07:41 +00:00Commented Jun 14 at 19:07
- \$\begingroup\$ Nah I don't want serial.And I'm planning to create a mini-data center.On a ram I can host a world wide web server or whatever.Can you propose me something else which would make the pins of this ram fit into the holes of a breadboard? \$\endgroup\$Whiter Fox– Whiter Fox2025-06-14 19:40:09 +00:00Commented Jun 14 at 19:40
- \$\begingroup\$ @WhiterFox - The ZIF adapter Chester suggested doesn't require any soldering \$\endgroup\$Wesley Lee– Wesley Lee2025-06-14 20:02:01 +00:00Commented Jun 14 at 20:02