CH32V307WBU6R — WCH
RISC-V RV32IMAC MCU, 144MHz, 256KB flash, 64KB SRAM, QFN68, tape & reel, 2500 pcs

Category: MCU

Pricing
  LCSC         $1.57
  Mouser       $2.05
  DigiKey      $2.10
  Farnell      $2.15

Manufacturer: https://www.wch.cn