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8MB PSRAM chip for Teensy 4.1
This 8 MB PSRAM (pseudo-static RAM) chip adds extra memory to the Teensy 4.1 microcontroller board. Solder it to the smaller pads on the bottom side of the T...
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This 8 MB PSRAM (pseudo-static RAM) chip adds extra memory to the Teensy 4.1 microcontroller board. Solder it to the smaller pads on the bottom side of the Teensy 4.1, underneath the SD card socket, between pins 31–32 and 33–34.
A second PSRAM chip can be added for a total of 16 MB. In Arduino, use the EXTMEM keyword to allocate large arrays or variables in PSRAM. Note that EXTMEM variables are not initialised at startup and will contain random data — set them to zero or fill them before use.
Key Features
- 8 MB PSRAM – Expands Teensy 4.1 memory for large buffers and data
- Stackable – Add a second chip for 16 MB total
-
Arduino Compatible – Use the
EXTMEMkeyword to allocate variables in PSRAM - Surface-Mount – Solders to dedicated pads on Teensy 4.1 bottom side
Ideal For
- Audio buffers and DSP applications
- Large data arrays and image processing
- Projects requiring more RAM than the Teensy 4.1's built-in 1 MB
Package Contents
- 1× 8 MB PSRAM Chip
Jargon buster
Plain-language definitions for the technical terms used above.
- DSP
- Digital signal processing means using software or hardware to analyse or modify signals such as audio, vibration, or sensor readings. A board suited to DSP is useful when a project needs fast maths for filtering, synthesis, or real-time signal analysis.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- RAM
- RAM (random-access memory) is fast, temporary memory a device uses for working data while it is running; in its common volatile form, its contents are lost when power is removed. Some devices offer a mode that applies settings to RAM only, which is handy for testing changes temporarily because they are not stored permanently and disappear at power-off.
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