BUY PA28F400BVB80 https://www.utsource.net/itm/p/11541763.html

Description: Flash Memory, 4Mb, 5V, SOP44 Features: 4Mb (512K x 8) Flash Memory Access Time: 70ns Low Power Consumption Single 5V Power Supply High Performance CMOS Process Pin Compatible with 28F400BV Package: 44-pin SOP Applications: Handheld Computers Printers Set-Top Boxes Automotive Electronics Industrial Control Networking Equipment Telecommunications Equipment (For reference only)