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Teensy 4.1 with Ethernet
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Awesome Extras
Teensy 4.1 with Ethernet chip features the fastest microcontroller and an expanded set of powerful peripherals in a 2.4"x0.7" form factor and can be programmed using the Arduino IDE with Teensyduino add-on.
We also stock a version of this board without the Ethernet chip (a workaround for the pesky chip shortages!) which is slightly cheaper - handy if you have no use for the Ethernet functionality.
We also sell the Teensy 4.1 with pre-assembled headers (great for those who don't enjoy soldering!)
Comparison to Teensy 4.0
Teensy 4.1 & 4.0 use the same IMXRT1062, so most technical specifications are the same. Please refer to the Teensy 4.0 page for common specifications and features.
| Feature | Teensy 4.1 | Teensy 4.0 |
|---|---|---|
| Ethernet | 10 / 100 Mbit DP83825 PHY (6 pins) |
-none- |
| USB Host | 5 Pins with power management |
2 SMT Pads |
| SDIO (4-bit data) | Micro SD Socket | 8 SMT Pads |
| PWM Pins | 35 | 31 |
| Analog Inputs | 18 | 14 |
| Serial Ports | 8 | 7 |
| Flash Memory | 8 Mbyte | 2 Mbyte |
| QSPI Memory | 2 chips Plus Program Memory |
Program memory only |
| Breadboard Friendly I/O | 42 | 24 |
| Bottom SMT Pad Signals | 7 | 16 |
| SD Card Signals | 6 | 0 |
| Total I/O Pins | 55 | 40 |
Pinouts
Teensy 4.1 is designed to bring all general-purpose I/O pins to breadboard-friendly pads on the outside edges.
Ethernet
To use the Ethernet port, a magjack and capacitor need to be connected.
We have the PJRC Ethernet kit available here.
Memory Expansion
The bottom side of Teensy 4.1 has locations to solder 2 memory chips
The smaller location is meant for a PSRAM chip. The larger location is intended for flash memory.
The PSRAM chip is meant to be soldered to the smaller pads on the bottom side of Teensy 4.1, underneath the SD card socket, between pins 31-32 and 33-34. Do not use the larger pads. A single PSRAM chip must be soldered to the smaller pads to be detected.
USB Host
Teensy 4.1's USB Host port allows you to connect USB devices, like keyboards and MIDI musical instruments. A 5 pin header and a USB Host cable are needed to be able to plug in a USB device. USB hubs may be used if more than 1 device is needed.
Revision History
As of 03/04/2024 we are no longer including header strips with our Teensy boards.
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4.89
Based on 28 reviews
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Product Reviews
Teensy 4.1 with Ethernet
Teensy 4.1 is super powerful for my robotics projects. I am amazed by how fast and how many multiple ADCs and PWMs as well as digital IO can it monitor and control at the same time. A real “tiny” powerhouse.
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2 days ago
Teensy 4.1 with Ethernet
The Teensy is a superb little computer for the money - ethernet, 3 canbus, and plenty of speed and inputs/outputs. The backbone of agopengps !
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2 months ago
Teensy 4.1 with Ethernet
The product works great, I needed this for an M8 Tracker Headless setup, and it works a treat, easy to upload code.
it arrived quickly, and the store at the best price I could find, I will definitely shop from here again.
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3 months ago
Teensy 4.1 with Ethernet
Just as advertised, delivered quickly in very nice packaging and at the best price if I wanted it this side of Christmas.
The Teensy is ubiquitous, so no need to extol it's virtues, but it's definitely worth praising the Pi hit for the service.
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3 months ago
Teensy 4.1 with Ethernet
Needed this for another project - it's a brilliant piece of engineering packing a lot of functionality into its small footprint.
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4 months ago
Teensy 4.1 with Ethernet
Reviewer didn't leave any comments
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6 months ago
Teensy 4.1 with Ethernet
Excellent as usual. Love these processors. My default controller!
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8 months ago
Teensy 4.1 with Ethernet
I’ve definitely found my new favourite microcontroller. What a great bit of kit. Fast and small with the perfect range of ports and controllers.
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9 months ago
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