5 V, 3.3 V and 2.5 V UART with 64-byte FIFOs

The SC16C751B is a Universal Asynchronous Receiver and Transmitter (UART) used for serial data communications. Its principal function is to convert parallel data into serial data, and vice versa. The UART can handle serial data rates up to 5 Mbit/s.

The SC16C751B is functionally equivalent to the SC16C750B, and requires a special software initialization sequence to configure the device to operate (see Section 6.6). Programming of control registers enables the added features of the SC16C751B. Some of these added features are the 64-byte receive and transmit FIFOs, automatic hardware flow control. The selectable auto-flow control feature significantly reduces software overload and increases system efficiency while in FIFO mode by automatically controlling serial data flow using RTS output and CTS input signals. On-board status registers provide the user with error indications, operational status, and modem interface control. System interrupts may be tailored to meet user requirements. An internal loopback capability allows on-board diagnostics.

The SC16C751B operates at 5 V, 3.3 V and 2.5 V, the industrial temperature range and is available in the plastic HVQFN24 package.