MAX14830ETM+G3U

Overview

The MAX14830ETM+G3U is a quad universal asynchronous receiver-transmitter (UART) featuring four independent channels, each equipped with 128-word transmit and receive FIFOs. It bridges SPI or I²C microprocessor buses to asynchronous interfaces like RS-485, RS-232, or IrDA. The device supports data rates up to 24 Mbaud in 2x/4x rate modes and includes logic-level translation down to 1.61V for controller and transceiver interfaces. It operates on supply voltages ranging from 2.35V to 3.6V and functions within an extended temperature range of -40°C to +85°C.

Feature Summary

• Integrates four UART channels with deep 128-word FIFOs to offload host processor data flow management.
• Supports flexible baud-rate generation using internal PLL and fractional generators without external oscillators.
• Provides automated half-duplex control features including auto transceiver direction control and echo suppression.
• Enables synchronized transmission start across multiple UARTs via SPI-based triggering commands.

Applications

• Industrial Control Systems
• Programmable Logic Controllers (PLC)
• IO-Link Master Controllers
• Medical Systems
• Airplane Communication Buses

Procurement Notes

Verify the specific G3U suffix against the manufacturer's current ordering guide to confirm compliance details. Ensure the component matches the 48-pin TQFN package dimensions specified in the datasheet. Confirm that the voltage levels align with your system's VL, VA, and VEXT requirements before finalizing procurement.

Selection Notes

Select this component when a single chip must expand multiple serial ports from a limited MCU interface. It is suitable for designs requiring high-speed asynchronous communication up to 24 Mbaud. Consider its integrated logic translation if interfacing with peripherals operating at different voltage domains than the main controller.

Part Context

This part belongs to the MAX14830 series of advanced quad serial UARTs manufactured by Analog Devices/Maxim Integrated. It is designed to replace discrete UART solutions, offering register compatibility with older models like the MAX3107, MAX3108, and MAX3109 while providing enhanced buffering and synchronization capabilities.

Replacement Considerations

Direct pin-compatible replacements include the MAX3109 for dual-channel applications or the MAX3107/MAX3108 for single/dual configurations. Verify that the substitute device supports the required 128-word FIFO depth and 24 Mbaud data rate specifications.