USB to serial converter with 1.8, 3.3 and 5 V signaling
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kicad-library @ 39b1ada


USB Cereal

USB Cereal is designed by Andrew Bradford <>.

USB Cereal is a USB to UART bridge circuit supporting target devices which
operate at 1.8 V, 3.3 V, and 5 V logic levels and using the common "FTDI cable"
6 pin cable pinout interface.

USB Cereal is Open Source Hardware, please see the LICENSE file for more

The USB Cereal project design requirements are documented in the REQUIREMENTS

The USB Cereal project design specification is documented in the SPECIFICATION

USB Cereal is designed in the KiCad EDA electronics CAD software running on the
Debian GNU/Linux operating system.  You can obtain a copy of KiCad EDA from and a copy of Debian from

In order to obtain the schematic parts library and layout footprint files,
please use the git submodule tools built into the git version control system.
In order to use git's submodule tools to obtain the library and footprint
files, follow these exact steps in your terminal emulator from the directory
where this README resides on your system:

1. git submodule init
2. git submodule update