Check the listing for details. PJRC Teensy 4.1 iMXRT1062 Microcontroller Development Board w/ 2X 8MB PSRAM ICs. Condition: New. Listed at 39.50 USD. Teensy 4.1 iMXRT1062 Microcontroller Development Board by PJRC with 2 Pieces 8MB PSRAM Teensy 4.1 is the latest Teensy microcontroller development board from PJRC. It features an ARM Cortex-M7 IMXRT1062 processor at 600 MHz. The actual size is 2.4 by 0.7 inch, the same form-factor as Teensy 3.6.This kit includes the Teensy 4.1 Microcontroller board with two 8 MByte PSRAM SOIC ICs. It has all the parts needed to add 16 Megabytes of RAM to the Teensy 4.1. Teensy 4.1 uses the same processor as Teensy 4.0, but provides greater I/O capability, including an ethernet PHY, SD card socket, and USB host port. Teensy 4.1 also comes with 4X larger flash memory, and has 2 locations to optionally add more memory. Technical Specifications compared to Teensy 4.1 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. Note: The Teensy 4.1 does not include headers and, if needed in your application, will need to be purchased separately and soldered on yourself. Package Includes: 1x PJRC Teensy 4.1 Microcontroller Development Board without pins 2x (2 Pieces) 8 Megabyte PSRAM SOIC Chips Printed pinout and usage reference cardNOTE: The SOIC PSRAM chips are not soldered onto the Teensy 4.1 board. The user will need to solder the chips to the Teensy board in order to use them. See the PJRC Teensy 4.1 website for detailed instructions. Envistia Mall is an authorized PJRC Teensy distributor. Get it faster! Ships from our Colorado office in 1 day for quick US delivery. We provide FREE USPS First Class Shipping with Tracking - Not Economy Shipping