LinkIt Smart 7688

Description of product


LinkIt Smart 7688

The Linklt Smart 7688 development platform offers two developments boards:

  • Linklt Smart 7688: MPU only. Powered by Media Tek MT7688.

  • Linklt Smart 7688 Duo: MPU and MCU. Powered by Media Tek MT7688 and ATmega 32U4.


LinkIt Smart 7688 is an open development board which is based on OpenWrt Linux distribution and MT7688. The board is designed especially to enable the prototyping of Rich IoT Application for Smart Home. The board offers you the memory and packet storage to enable robust video processing. The platform also offers options to create device applications in Python, Node.js and C programming language.


LinkIt Smart 7688 is a co-design product by Seeed Studio and MediaTek. It brings together the parties' knowledge in open hardware and industry leading reference designs for IoT devices to create this powerful development board.


LinkIt Smart 7688 is fully supported on the MediaTek Labs site: check out the LinkIt section and register here to download the SDK, participate in the Forums, and more.


Note (important)

In order to protect the product from improper operation, please pay attention to below notes.

  • Choose more reliable power adapter with stable output.

  • Recommended conditions of power input source for 7688:

1. Overshoot voltage of power input should not over 5.5.

2. Voltage wave should be within ±100mV of rated voltage.



  • Single input single output(1T1R) Wi-Fi 802.11 b/g/n.

  • Pin-out for GPIO, I2C, I2S, SPI, UART, PWM and Ethernet Port.

  • 580 MHz MIPS CPU.

  • 32MB flash and 128MB DDR2 RAM.

  • USB host.

  • Micro SD slot.

Technical details

Dimensions56mm x26mm x18mm
WeightG.W 13g
Clock speed580MHz
Working voltage3.3V
PCB Size
Dimensions55.7 x 26 mm
USB Power5V (USB micro-B)
VCC3.3V (Pin Breakout)
Pin Count22 (MT7688AN)
Pin Count4 (MT7688AN)
Max. Resolution7 bits (customizable)
Maximum Frequency@Resolution100kHz@1-bit50kHz@2-bit / 25kHz@3-bit 12.5kHz@4-bit / 6.25kHz@5-bit3.125kHz@6-bit / 1.5625kHz@7-bit (Standard mode)
Maximum Frequency@Resolution40MHz@1-bit20MHz@2-bit / 10MHz@3-bit 5MHz@4-bit / 2.5MHz@5-bit1.25Mhz@6-bit / 625kHz@7-bit (Fast mode)
Pin Count22 (MT7688AN)
Set count1 (MT7688AN)
Pin numbersP22, P23,P24 (Shared with on-board flash), P25
Max. Speed25 MHz
Set count1 (MT7688AN)
Pin numbersP28, P29, P30, P31
Max. Speed25 MHz
Set count1 (MT7688AN)
Pin numbersP10, P11, P12, P13
Set count1
Pin numbersP20, P21
Set count3 (MT7688AN)
Pin numbersP8, P9, P16, P17, P18, P19
Max. Speed0.5Mbps
Set count1 (MT7688AN)
Pin numbersP6, P7
Wi-Fi1T1R 802.11 b/g/n (2.4G)
Ethernet1-port 10/100 FE PHY
Pin numbersP2, P3, P4, P5

Part List

LinkIt Smart 76881