8-Bit 8051 USB Controller, 48MHz, 16KB RAM, SSOP
USB 2.0 Peripheral Controller, 48MHz, 8051, 16KB RAM, SSOP
Full Speed/High Speed USB Peripheral Controller USB 2.0 3.3V 56-Pin SSOP
8051 Microcontroller, 24MHz, 16KB RAM, SSOP-56