These SOIC PSRAM chips can add 16 Megabytes of RAM (2X 8 Megabytes) to a Teensy 4.1 microcontroller.
One IC can be installed to add 8 MByte RAM, or both ICs can be installed for 16 MByte.
For more details and installation instructions, see PJRC's PSRAM Chip for Teensy 4.1 web page.
Note: The Teensy 4.1 microcontroller board is NOT included. The Teensy 4.1 board with these ICs can be purchased here: Teensy 4.1 iMXRT1062 Microcontroller Development Board with 2X 8MB PSRAM ICs.
2x 8 MBytes PSRAM SOIC ICs
Envistia Mall is an authorized PJRC Teensy distributor.