TL16C554IFNR

The Texas Instruments TL16C554IFNR is a Quad Universal Asynchronous Receiver Transmitter (UART) integrated circuit designed for efficient serial communication. It incorporates four improved TL16C550 ACEs with steering logic, and in FIFO mode, each transmitter and receiver is buffered with 16-byte FIFOs to minimize CPU interrupt frequency.

This device supports a maximum clock rate of 16 MHz, enabling operation up to 1 Mbps. It features programmable baud rate generators, allowing division of any input reference clock by 1 to (2^16 - 1) and generating an internal 16x clock. The TL16C554IFNR can add or delete standard asynchronous communication bits such as start, stop, and parity bits to or from the serial data stream. It offers independently controlled transmit, receive, line status, and data set interrupts.

Key serial interface characteristics include support for 5-, 6-, 7-, or 8-bit characters, even, odd, or no-parity bit options, and 1-, 1 1/2-, or 2-stop bit generation. It also includes false start bit detection, complete status reporting, line break generation and detection, and internal diagnostic capabilities like loopback controls for communications link fault isolation. The UART includes modem control functions (CTS, RTS, DSR, DTR, RI, DCD) and 3-state outputs for bidirectional data and control bus capabilities.

The TL16C554IFNR is available in a 68-PLCC package and is suitable for surface mount applications. It operates within a temperature range of -40°C to 85°C.