The Teensy 4.1 is the latest Teensy, offering the fastest micocontroller and an expanded set of powerful peripherals in a 2.4 by 0.7 inch form factor. In common with the Teensy 4.0, it can be programmed using the Arduino IDE with Teensyduino add-on. Teensy 4.1 is designed to bring all general purpose I/O pins to breadboard friendly pads on the outside edges.
While it shares many similarities with the Teensy 4.0 there are some important differences.
|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|
|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|
All Teensy boards are shipped assembled (without headers) and fully tested.
Teensy 4.1 & 4.0 use the same IMXRT1062, so most technical specifications are the same.
To use the Ethernet port, a magjack and capacitor need to be connected.
This is currently available only as a DIY project using this OSH Park Shared Circuit Board. PJRC is planning to offer this as a DIY kit in the near future. You can also make the connection by soldering wires.
These parts are recommended to build the Ethernet connection.
|2||Header, 3×2, 2mm pitch||Digikey 1849-1000-ND|
|2||IDC Socket, 3×2, 2mm pitch||Amphenol FCI 89361-706LF, Digikey 609-3139-ND|
|1||Ribbon Cable, 3 to 6 inch||Digikey HF06S-5-ND|
|1||Capacitor, 0.1uF, 805|
|1||Capacitor, 1uF, 805||probably not needed|
|1||Capacitor, 1nF, 805||optional, should be high voltage rated if used|
|1||Circuit Board||OSH Park Shared PCB|
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.
Teensy 4.1’s USB Host port allow 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. See the USBHost_t36 examples for details.
For additional specs and information, please also look at the manufacturer’s webpage – Teensy 4.1 Product Page at PJRC