MAX3109_12 Datasheet, PDF (1/66 Pages) Maxim Integrated Products – Dual Serial UART with 128-Word FIFOs

19-5806; Rev 1; 5/12
Dual Serial UART with 128-Word FIFOs
General Description
The MAX3109 advanced dual universal asynchronous
receiver-transmitter (UART) has 128 words of receive
and transmit first-in/first-out (FIFO) and a high-speed SPI
or I²C controller interface. The 2x and 4x rate modes
allow a maximum of 24Mbps data rates. A phase-locked
loop (PLL) and the fractional baud-rate generators allow
a high degree of flexibility in baud-rate programming and
reference clock selection.
Independent logic-level translation on the transceiver
and controller interfaces allows ease of interfacing to
microcontrollers, FPGAs, and transceivers that are pow-
ered by differing supply voltages. Automatic hardware
and software flow control with selectable FIFO interrupt
triggering offloads low-level activity from the host control-
ler. Automatic half-duplex transceiver control with pro-
grammable setup and hold times allow the MAX3109 to
be used in high-speed applications such as PROFIBUS-
DP. The 128-word FIFOs have advanced FIFO control,
reducing host processor data flow management.
The MAX3109 is available in a 32-pin TQFN (5mm x
5mm) package and is specified over the -40°C to +85°C
extended temperature range.
Applications
Handheld Devices
Power Meters
Programmable Logic
Controllers (PLCs)
Medical Systems
Automotive Infotainment
Systems
Point-of-Sales Systems
HVAC or Building Control
VL
VCC
V18
Features
S 24Mbps (max) Baud Rate
S Integrated PLL and Divider
S 1.71V to 3.6V Supply Range
S High-Resolution Programmable Baud Rate
S SPI Up to 26MHz Clock Rate
S Fast Mode Plus I²C Up to 1MHz
S Automatic RTS_ and CTS_ Flow Control
S Automatic XON/XOFF Software Flow Control
S Special Character Detection
S 9-Bit Multidrop Mode Data Filtering
S SIR- and MIR-Compliant IrDA^SM Encoder/Decoder
S Flexible Logic Levels on the Controller and
Transceiver Interfaces
S Line Noise Indication
S 1FA Shutdown Current
S Two Timers Routed to GPIOs
S 8 Flexible GPIOs with 20mA Drive Capability
S Register Compatible with MAX3107, MAX3108,
MAX14830
S Small TQFN (5mm x 5mm) Package
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX3109ETJ+
-40NC to +85NC
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Functional Diagram
VEXT
LDOEN
SPI/I2C
MOSI/A1
MISO/SDA
CS/A0
SCLK/SCL
RST
IRQ
LOGIC-LEVEL
TRANSLATION
LDO
SPI
AND
I²C
INTERFACE
TRANSMITTER
SYNC
2
REGISTERS
AND
CONTROL
MAX3109
XIN
XOUT
CRYSTAL
OSCILLATOR
FRACTIONAL ₂
DIVIDER
PLL
BAUD-RATE
GENERATOR
AGND
IrDA is a service mark of Infrared Data Association Corporation.
UART0
UART1
DGND
LOGIC-LEVEL
TRANSLATION
TX0
RX0
CTS0
RTS0
GPIO0
GPIO1
GPIO2
GPIO3
TX1
RX1
CTS1
RTS1
GPIO4
GPIO5
GPIO6
GPIO7
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.