MAX3100EEE

The MAX3100EEE is a Universal Asynchronous Receiver Transmitter (UART) controller optimized for small microcontroller-based systems. It utilizes an SPI/MICROWIRE interface for communication with the host microcontroller and is housed in a compact 16-pin QSOP package.

This UART controller supports asynchronous I/O suitable for RS-232, RS-485, IR, and opto-isolated data links, including an IrDA timing mode. It includes a crystal oscillator and a baud-rate generator capable of software-programmable rates from 300 baud to 230k baud. The device operates with a supply voltage range of 2.7V to 5.5V and consumes a typical operating current of 150µA, with a low quiescent current of 10µA in shutdown mode.

Key features include an 8-word FIFO buffer to minimize processor overhead, a flexible interrupt system with four maskable sources, and support for 9-bit address recognition on networks. It also provides two hardware-handshaking control lines. The MAX3100EEE is designed for applications such as handheld instruments, intelligent instrumentation, small networks in HVAC or building control, and low-cost IR data links.