The MAX3100 universal asynchronous receiver transmitter (UART) is the first UART specifically optimized for small microcontroller-based systems. Using an SPI™/MICROWIRE™ interface for communication with the host microcontroller (µC), the MAX3100 comes in a compact 16-pin QSOP. The asynchronous I/O is suitable for use in RS-232, RS-485, IR, and opto-isolated data links. IR-link communication is easy with the MAX3100's infrared data association (IrDA) timing mode.
The MAX3100 includes a crystal oscillator and a baud-rate generator with software-programmable divider ratios for all common baud rates from 300 baud to 230k baud. A software- or hardware-invoked shutdown lowers quiescent current to 10µA, while allowing the MAX3100 to detect receiver activity.
An 8-word-deep first-in/first-out (FIFO) buffer minimizes processor overhead. This device also includes a flexible interrupt with four maskable sources, including address recognition on 9-bit networks. Two hardware-handshaking control lines are included (one input and one output).
The MAX3100 is available in 14-pin plastic DIP and small, 16-pin QSOP packages in the commercial and extended temperature ranges.
Key Features
Applications/Uses
16-Pin QSOP Package (8-pin SO footprint): Smallest UART Available
Full-Featured UART:
IrDA SIR Timing Compatible
8-Word FIFO Minimizes Processor Overhead at High Data Rates
Up to 230k Baud with a 3.6864MHz Crystal
9-Bit Address-Recognition Interrupt
Receive Activity Interrupt in Shutdown
SPI/MICROWIRE-Compatible µC Interface
Lowest Power:
150µA Operating Current at 3.3V
10µA in Shutdown with Receive Interrupt
+2.7V to +5.5V Supply Voltage in Operating Mode
Schmitt-Trigger Inputs for Opto-Couplers
TX and RTS-bar Outputs Sink 25mA for Opto-Couplers
Notes: **This pricing is BUDGETARY, for comparing similar parts. Prices are in
U.S. dollars and subject to change. Quantity pricing may vary
substantially and international prices may differ due to local
duties, taxes, fees, and exchange rates. For volume-specific prices
and delivery, please see the price and availability page
or contact an authorized distributor.
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