Teensy 4.1 Fully Loaded (Low Profile)

Description

For the vertically challenged, the Teensy 4.1 Fully Loaded (Low Profile) is like our standard Teensy 4.1 Fully Loaded product, but built with very short low profile male headers and shipped along with the mating low profile female header sockets.   Because of the low profile nature of the product, the male Ethernet header is not installed unless it is requested to be added.  The following memory options can be selected above or down below.

• 8MB/64M-bit PSRAM & 16MB/128M-bit Flash
• 8MB/64M-bit PSRAM & 128MB/1G-bit NAND Flash
• 8MB/64M-bit PSRAM & 256MB/2G-bit NAND Flash
• 16MB/128M-bit PSRAM with no Flash

All memory is installed and tested.    This version of Teensy 4.1 is built to order and will typically ship in 1 or 2 business days.

Package Includes:

• Teensy 4.1 configured with PSRAM and Flash memory based on selection and male header pins installed
• Qty 2 – 1×24 mating low profile female header sockets
• Handy pinout diagram

Low Profile Specifics:

The female header socket is 3.5mm  (0.14″) tall and the contacts have a gold flash.

The male header pin are 2.54mm (0.1″) long with a gold flash and have a 2.5mm (0.1″) tall plastic body.

When these headers are stacked, the combined height is about 6.1mm (0.24″) compared to 11mm for the standard length header/socket combo.  This saves about 5mm (0.19″ in height as shown in the picture below.  Even with a relatively short contact area, the headers mate with a solid mechanical and electrical connection.

Low Profile Header Comparison to Standard Header

The total stack-up from the baseboard to the top of the Teensy USB connector which is the highest point on the Teensy is 10.6mm as shown below.

Low Profile Header Stack-up with Teensy

Note:   The picture shows spring-loaded POGO pins connecting to the USB pads on the bottom of the Teensy so that the USB can be routed to the edge of the board since the Teensy will be inaccessible in this particular application.  In this case, it also allowed the USB connector type to be converted to USB-C.  A good POGO pin height for use with these headers is 7.5mm.

Note:  The short male header pins prevents this version of Teensy 4.1 from plugging into a standard solderless breadboard.  These are typically used with a custom PCB or solder type proto board with the matching mating female sockets.

If you are looking for a Teensy 4.1 fully loaded for use with a breadboard or standard header sockets, head over to this link:  https://protosupplies.com/product/teensy-4-1-fully-loaded/

If you are looking for a low profile Teensy 4.1 fully loaded for use with a PCB baseboard that requires the I/O to be brought down from the bottom of the Teensy 4.1, head over to this link:  https://protosupplies.com/product/teensy-4-1-fully-loaded-for-prototyping-system-low-profile/

Please Note:  Since this item is hand-modified, we can usually configure and ship additional assemblies within one or two business days.  If you have requirements for a larger number than we show in stock or need further customization such as being built using the Lockable version of Teensy 4.1, or you want the headers left loose and just install the memory chips, Email us at support@protosupplies.com with your requirements. 

The Teensy 4.1 has locations for optional 8MB PSRAM (SPI Serial RAM) and Flash (SPI Serial Flash) memory chips that can be installed by the user.  These surface mount locations can be difficult to solder and many technical issues are eventually traced back to poor soldering on these components.  This is especially true of the WSON Flash memory packages.

For those wanting these parts without the drama, we are offering 4 versions of the fully populated Teensy 4.1 with these chips preinstalled and tested.

Select which memory configuration you want and the quantity.

DEV-24-LP has an 8MB (64M-bit) volatile PSRAM installed along with a 16MB (128M-bit) non-volatile NOR Flash memory as shown below.

The Flash chip will be a Winbond W25Q128JVSIQ.  The PSRAM will be AP 6404L-3SQR or compatible part.

When used with LittleFS file system, the 16MB/128M-bit NOR Flash chip uses the LittleFS_SPIFlash constructor.

#include “LittleFS.h”
LittleFS_QSPIFlash myfs; // NOR FLASH 128Mb

Teensy 4.1 Fully Loaded – PSRAM and 64MB NOR Flash Chips Low Profile

DEV-24-1G-LP has an 8MB (64M-bit) volatile PSRAM installed along with a 128MB (1G-bit) non-volatile NAND Flash memory as shown below for those that need a large amount of non-volatile storage such as for data logging.  The NAND Flash is the 8-pad WSON 8x6mm package.

The Flash chip will be a Winbond W25N01GVZEIG. The PSRAM will be AP 6404L-3SQR or compatible part.

When used with the LittleFS file system, the 128MB/1G-bit NAND Flash chip uses the LittleFS_QPINAND constructor.

#include “LittleFS.h”
LittleFS_QPINAND myfs; // NAND FLASH 1Gb

Teensy 4.1 Fully Loaded – PSRAM and 1Gb NAND Flash Chips Low Profile

DEV-24-2G-LP has an 8MB (64M-bit) volatile PSRAM installed along with a 256MB (2G-bit) non-volatile NAND Flash memory as shown below for those that need an even larger amount of non-volatile storage such as for data logging, image files or audio files.  The NAND Flash is the 8-pad WSON 8x6mm package.

The Flash chip will be a Winbond W25N02KVZEIR. The PSRAM will be AP 6404L-3SQR or compatible part.

When used with the LittleFS file system, the 256MB/2G-bit NAND Flash chip uses the LittleFS_QPINAND constructor.

#include “LittleFS.h”
LittleFS_QPINAND myfs; // NAND FLASH 2Gb

Teensy 4.1 Fully Loaded – PSRAM and 2Gb NAND Flash Chips Low Profile

DEV-24P-LP has two volatile PSRAM chips installed for a total of 16MB (128M-bit) as shown below.  There is no external Flash memory installed as the 2nd PSRAM chip physically occupies the Flash location.

The PSRAM will be AP 6404L-3SQR or compatible part.

Teensy 4.1 Fully Loaded – 16MB PSRAM Chips Low Profile

In addition to adding the chips, the low profile male header pins are installed and the assembly is cleaned.

Once assembly is completed, we run test software which is a combination of the PJRC PSRAM and Flash test programs that thoroughly exercises these devices.

For full details on the Teensy 4.1 as well as additional compatible parts that may be of interest, please refer to the full Teensy 4.1 Product Page.

Before they are shipped, the Teensy 4.1 has:

• 8MB PSRAM chip is installed.
• Either a 16MB, 128MB, 256MB Flash chip or 2nd 8MB PSRAM is installed depending on selection.
• 1×24 (x2) low profile flash gold-plated male header pins are installed.
• Board is cleaned of flux.
• PSRAM and Flash chip test software is downloaded and run to verify correct chip operation.
• Blink example is downloaded.
• Packaged in resealable ESD bag for safe storage along with mating 1×24 female header sockets.

FURTHER READING:

LEARN – Working with Teensy 4.1 Memory – Overview of the Teensy 4.1 memory architecture including the optional PSRAM and Flash memories.

Notes: 

1. None

Technical Specifications