CH554TR — WCH
Enhanced E8051 MCU, USB, 16KB flash, TSSOP20, tape & reel, 2500 pcs

Category: MCU

Pricing
  LCSC         $0.52
  Mouser       $0.60
  DigiKey      $0.67
  Farnell      $0.70

Manufacturer: https://www.wch.cn