MAX3109_15 Datasheet, PDF (1/66 Pages) Maxim Integrated Products – Dual Serial UART with 128-Word FIFOs

MAX3109
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 refer-
ence clock selection.
Independent logic-level translation on the transceiver and
controller interfaces allows ease of interfacing to micro-
controllers, FPGAs, and transceivers that are powered
by differing supply voltages. Automatic hardware and
software flow control with selectable FIFO interrupt trig-
gering offloads low-level activity from the host controller.
Automatic half-duplex transceiver control with program-
mable setup and hold times allow the MAX3109 to be
used in high-speed applications such as PROFIBUSDP.
The 128-word FIFOs have advanced FIFO control, reduc-
ing 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
●● Automotive Infotainment
●● Power Meters
Systems
●● Programmable Logic
●● Controllers (PLCs)
●● Medical Systems
●● Point-of-Sales Systems
●● HVAC or Building Control
Functional Diagram
Features
●● 24Mbps (max) Baud Rate
●● Integrated PLL and Divider
●● 1.71V to 3.6V Supply Range
●● High-Resolution Programmable Baud Rate
●● SPI Up to 26MHz Clock Rate
●● Fast Mode Plus I²C Up to 1MHz
●● Automatic RTS_ and CTS_ Flow Control
●● Automatic XON/XOFF Software Flow Control
●● Special Character Detection
●● 9-Bit Multidrop Mode Data Filtering
●● SIR- and MIR-Compliant IrDA^SM Encoder/Decoder
●● Flexible Logic Levels on the Controller and
Transceiver Interfaces
●● Line Noise Indication
●● 1FA Shutdown Current
●● Two Timers Routed to GPIOs
●● 8 Flexible GPIOs with 20mA Drive Capability
●● Register Compatible with MAX3107, MAX3108,
MAX14830
●● Small TQFN (5mm x 5mm) Package
Ordering Information
PART
MAX3109ETJ+
TEMP RANGE
-40ºC to +85ºC
PIN-PACKAGE
32 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
VL
VCC
V18
VEXT
LDOEN
SPI/I2C
MOSI/A1
MISO/SDA
CS/A0
SCLK/SCL
RST
IRQ
XIN
XOUT
LOGIC-LEVEL
TRANSLATION
LDO
SPI
AND
I²C
INTERFACE
TRANSMITTER
SYNC
2
UART0
REGISTERS
AND
CONTROL
MAX3109
CRYSTAL
OSCILLATOR
FRACTIONAL ₂
DIVIDER
PLL
BAUD-RATE
GENERATOR
AGND
UART1
DGND
LOGIC-LEVEL
TRANSLATION
TX0
RX0
CTS0
RTS0
GPIO0
GPIO1
GPIO2
GPIO3
TX1
RX1
CTS1
RTS1
GPIO4
GPIO5
GPIO6
GPIO7
IrDA is a service mark of Infrared Data Association Corporation.
19-5806; Rev 3; 2/15