8051-based USB microcontroller with 16K RAM
The Infineon CY7C68013A-56PVXC is an 8051-core USB microcontroller from the EZ-USB FX2LP series, designed as a high-speed USB peripheral controller for applications such as data acquisition, test equipment, and industrial interfaces that need a USB 2.0 link with local intelligence. It integrates 16K x 8 RAM for code and data storage, but is ROMless — program memory must be supplied externally, typically via an I²C EEPROM or the USB host download. The interface set includes I²C, USB, and USART, with 24 general-purpose I/O lines in a 56-BSSOP (7.50mm width) surface-mount package.
The 16K x 8 RAM is the only on-chip memory; there is no internal Flash or ROM for program storage. Every design must include an external non-volatile memory device — typically a serial I²C EEPROM or a parallel Flash — to hold firmware, adding a line item to the BOM and a boot-time loading step. This architecture also enables in-system firmware updates via USB download without pre-programmed memory, a key advantage for field-upgradable products.
This removes the supply-chain urgency that often drives spot-market premiums on older USB controllers.
Package and footprint — 56-BSSOP
Housed in a 56-BSSOP (0.295", 7.50mm width) package, also specified as a 56-SSOP supplier device package, this is a fine-pitch surface-mount footprint.