CH32V307WBU6-I — WCH
RISC-V RV32IMAC MCU, 144MHz, 256KB flash, 64KB SRAM, QFN68, industrial range -40..+85C

Category: MCU

Pricing
  LCSC         $1.62
  Mouser       $2.18
  DigiKey      $2.17
  Farnell      $2.45

Manufacturer: https://www.wch.cn