SPI/I²C UART with 128-Word FIFOs

The MAX3107 is an advanced universal asynchronous receiver-transmitter (UART) with 128 words each of receive and transmit first-in/first-out (FIFO) that can be controlled through I²C or high-speed SPI™. The 2x and 4x rate modes allow a maximum of 24Mbps data rates. A phase-locked loop (PLL), prescaler, and fractional baud-rate generator allow for high-resolution baud-rate programming and minimize the dependency of baud rate on reference clock frequency.

Autosleep and shutdown modes help reduce power consumption during periods of inactivity. A low 640µA (typ) supply current and tiny 24-pin TQFN (3.5mm x 3.5mm) package make the MAX3107 ideal for low-power portable devices.

Integrated logic-level translation on the controller and transceiver (RX/TX and active-low RTS/active-low CTS) interfaces enable use with a wide selection of RS-232/RS-485 transceivers.

Automatic hardware and software flow control with selectable FIFO interrupt triggering offloads low-level activity from the host controller. Automatic half-duplex transceiver control with programmable setup and hold times allow the MAX3107 to be used in high-speed applications, for example Profibus-DP.

The MAX3107 is ideal for use in portable devices, industrial, and automotive applications. The MAX3107 is available in a 24-pin SSOP package and a 24-pin TQFN package. It is specified over the -40°C to +85°C extended ambient temperature range.

Applications

* Automotive Infotainment Systems * Fieldbus Networks * HVAC or Building Control * Industrial Control Systems * Medical Systems * Point-of-Sale Systems * Portable Devices

* Bridges an SPI/MICROWIRE or I2C Microprocessor Bus to an Asynchronous Interface Such as RS-485, RS-232, or IrDASM

* SIR- and MIR-Compliant IrDA Encoder/Decoder

* Line Noise Indication Ensures Data Link Integrity

* Saves Up to 23% Board Space

* 24-Pin TQFN (3.5mm x 3.5mm) and SSOP Packages

* Integrated Internal Oscillator Eliminates the Need for an External Oscillator and Reduces the BOM Cost

* Integrated PLL and Divider

* Fast Data Rates Allow Maximum System Flexibility Across Interface Standards

* 24Mbps (max) Data Rate

* Fractional Baud-Rate Generator

* SPI Up to 26MHz Clock Rate

* Deep, 128-Word Buffer and Automated Control Features Help Offload Activity on the Microcontroller

* Auto Transceiver Direction Control

* Half-Duplex Echo Suppression

* Auto RTS/CTS and XON/XOFF Flow Control

* 9-Bit Multidrop-Mode Data Filtering

* Special Character Detection

* GPIO-Based Character Detection

* Four Flexible GPIOs

* Power Management Control Features Minimize Power Consumption for Portable Applications

* +2.35V to +3.6V Supply Range

* Low 640µA (typ) Supply Current at 1Mbaud and 20MHz Clock

* Shutdown and Autosleep Modes

* Low 20µA (typ) Shutdown Power

* Logic-Level Translation on the Controller and Transceiver Interfaces (Down to 1.7V) Ensure System Compatibility

* Register Compatible with MAX3108, MAX3109, MAX14830