The ST16C1450IJ28 from Exar Corporation is a universal asynchronous receiver and transmitter (UART) that is pin and functionally compatible with the SSI 73M1550 and SSI 73M2550 UARTs. It features a 1-byte transmit FIFO, a 1-byte receive FIFO with error tags, four levels of prioritized interrupts, modem control signals, programmable character lengths, and a crystal or external clock input. It can operate at up to 1.5 Mbps transmit/receive speed with a 24 MHz clock and has a power-down mode that consumes only 50 uA at 3.3 V or 200 uA at 5 V.

The ST16C1450IJ28 is a versatile UART that can be used in a wide variety of applications, including battery-operated electronics, internet appliances, handheld terminals, personal digital assistants, and cellular phones. It is also well-suited for use in embedded systems and other applications where space and power consumption are critical considerations.

Here is a more detailed description of some of the key features of the ST16C1450IJ28:

1-byte transmit FIFO: The transmit FIFO allows the UART to continue transmitting data even if the CPU is busy with other tasks. This can improve the overall performance of the system by reducing the number of times the CPU needs to be interrupted to service the UART. 1-byte receive FIFO with error tags: The receive FIFO allows the UART to store incoming data even if the CPU is not ready to read it. This can prevent data loss in high-traffic environments. The error tags allow the CPU to quickly identify any errors in the received data. Four levels of prioritized interrupts: The ST16C1450IJ28 can generate four different interrupts, which can be prioritized by the user. This allows the system to respond to different UART events in a timely manner. Modem control signals: The ST16C1450IJ28 supports a variety of modem control signals, including CTS#, RTS#, DSR#, DTR#, RI#, and CD#. This allows the UART to be used to control modems and other serial devices. Programmable character lengths: The ST16C1450IJ28 can be programmed to support character lengths of 5, 6, 7, or 8 bits. This makes it compatible with a wide variety of serial devices. Crystal or external clock input: The ST16C1450IJ28 can use a crystal or an external clock source. This gives the user flexibility in choosing a clock source that meets the needs of their application. 1.5 Mbps transmit/receive operation: The ST16C1450IJ28 can transmit and receive data at speeds up to 1.5 Mbps with a 24 MHz clock. This makes it suitable for use in high-speed applications. Power-down mode: The ST16C1450IJ28 has a power-down mode that consumes only 50 uA at 3.3 V or 200 uA at 5 V. This makes it ideal for use in battery-powered applications. Software controllable reset output: The ST16C1450IJ28 has a software controllable reset output that can be used to reset other devices in the system. 2.97 to 5.5 Volt operation: The ST16C1450IJ28 can operate with supply voltages from 2.97 to 5.5 V. This makes it compatible with a wide variety of systems. The ST16C1450IJ28 is a powerful and versatile UART that is well-suited for a wide variety of applications. It is pin and functionally compatible with the SSI 73M1550 and SSI 73M2550 UARTs, making it easy to upgrade existing designs. It also features a number of enhancements, such as a 1-byte transmit FIFO, a 1-byte receive FIFO with error tags, four levels of prioritized interrupts, modem control signals, programmable character lengths, and a power-down mode.

If you are looking for a UART that is reliable, versatile, and easy to use, the ST16C1450IJ28 from Exar Corporation is a great choice.