MAX3100EEE

Controllers Overview

The MAX3100EEE+ is a universal asynchronous receiver/transmitter (UART) optimized for small microcontroller-based systems, operating within an extended temperature range of -40°C to +85°C. It utilizes a compact 16-pin QSOP package and interfaces with the host via SPI/MICROWIRE protocols. The device supports data rates up to 230k baud using internal crystal oscillators or external clocks. Key electrical parameters include a supply voltage range of 2.7V to 5.5V, typical operating current of 150µA at 3.3V, and shutdown current of 10µA. It features an 8-word FIFO buffer, Schmitt-trigger inputs, and dedicated TX/RTS outputs capable of sinking 25mA.

Controllers Feature Summary

• Integrated SPI/MICROWire-compatible interface for direct connection to host microcontrollers
• On-chip oscillator supporting software-programmable baud rates from 300 to 230k baud
• Low-power architecture with hardware or software shutdown modes reducing quiescent current to 10µA
• Schmitt-trigger inputs and high-drive outputs designed for direct opto-coupler interfacing

Controllers Applications

• Handheld instruments requiring low power consumption
• Isolated RS-232 or RS-485 links driving opto-couplers directly
• Small networks in HVAC or building control systems
• Low-cost infrared data links for computers and peripherals

Controllers Procurement Notes

Verify the specific ordering suffix 'EEE' corresponds to the 16-pin QSOP package and the '-E' grade indicating the -40°C to +85°C extended temperature range. Confirm RoHS compliance status as indicated by the '+' suffix in official documentation. Ensure compatibility with existing PCB footprints for the QSOP-16 form factor during procurement planning.

Controllers Selection Notes

Select this component when system constraints require a UART bridge with minimal processor overhead and strict power limitations. The 16-pin QSOP package is suitable for applications where space is limited but through-hole or standard surface-mount density is preferred over smaller TQFN options. Verify that the required baud rates align with available crystal frequencies such as 1.8432MHz or 3.6864MHz for optimal accuracy.

Controllers Part Context

The MAX3100 series represents Maxim Integrated's first UART specifically optimized for resource-constrained embedded environments. It bridges synchronous SPI buses to asynchronous serial standards like RS-232, RS-485, and IrDA. The device offloads UART protocol handling from the main CPU, allowing for efficient data transfer in industrial and consumer electronics applications.

Controllers Replacement Considerations

The MAX3100ETG+ serves as a functional alternative offering identical electrical performance in a 24-pin TQFN-EP package. Consider pinout differences and thermal pad requirements when substituting. Other variants include the MAX3100CPD+ for commercial temperature ranges in DIP packages.