What are the steps that are needed when migrating from 48-FBGA MRAM to 60-FBGA nvSRAM device?
Cypress offers 16-Mb nvSRAM in a 60-ball FBGA package. When you are migrating from MRAM (48-ball FBGA) to nvSRAM, you should make the following modifications based on the footprint.
- Create 12 structural Vss pads at corners of the nvSRAM package.
- Connect ball A6 (NC) of MRAM to Vcc which is ball C8 (CE2) of nvSRAM.
- Leave ball E3 (DC) of MRAM either floating or pull up to Vcc which is ball G5 (HSB#) of nvSRAM. Do not short to Vss.
- Add an additional capacitor (typ. 22 µF +/- 10%; absolute range 19.8 µF to 82 µF) on the MRAM ball G2 which is ball J4 (Vcap) on the nvSRAM package.
Package Physical Dimensions