Teensy 4.1 Development Board

	TEENSY41_PINS	Teensy USB Board, Version 4.1, With Ethernet Chip, With Pins Soldered (Ethernet connector kit sold separately)	$35.50
	TEENSY41_NE_PINS	Teensy USB Board, Version 4.1, Without Ethernet Chip, With Pins Soldered	$33.60

Recommended Accessories: USB Cable, 8MB PSRAM, USB Host Cable, Ethernet Kit

Inventory Status:	In Stock, Low
Last physical count:	Dec 3, 2024

Teensy 4.1 features the fastest micocontroller and an expanded set of powerful peripherals in a 2.4 by 0.7 inch form factor.

Teensy 4.0 can be programmed using the Arduino IDE with Teensyduino add-on.

Technical Specifications Compared 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.

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 Ethenet connection.

1   Ethernet Magjack            RB1-125BAG1A, Mouser 950-RB1-125BAG1A, Digikey 1278-1011-ND
2   Header, 3x2, 2mm pitch      Digikey 1849-1000-ND
2   Socket, 3x2, 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   Resistor, 1M                optional
1   Circuit Board               OSH Park Shared PCB

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.

USB Host

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.