Instant Quote

Home > Integrated Circuits ICs > MAX3109ETJ+T

MAX3109ETJ+T

Dual UART, 24Mbps, 128-word FIFO, SPI/I2C, TQFN-32, IrDA

3679

Effective Inventory
Go to Inquiry

Image for reference only

Manufacturer Part：

MAX3109ETJ+T

Package：

TQFN-32 (5.0 x 5.0 x 0.75 mm)

Brand：
Product Categories：
Quality Commitment
Shipping & Payment
Service & Packaging
Product Manual
Other recommendations you may be interested in.

STM32L072RBT6

TPS65217CRSLR

SN74HC273NSR

ADE7953ACPZ-RL

SN74HC138N

ATMEGA328-AU

AD826ARZ-REEL7

TPA0211DGNR

Description

Product Overview

The MAX3109ETJ+T from Analog Devices (formerly Maxim Integrated) is an advanced dual-channel UART with 128-word FIFOs in a 32-pin TQFN (5 x 5 mm) package. It bridges SPI/I2C microcontroller buses to asynchronous serial interfaces (RS-485, RS-232, IrDA) with data rates up to 24 Mbps, integrated PLL, and flexible logic-level translation.

Key Specifications

Channels 2 (dual UART)
Max Data Rate 24 Mbps
FIFO Depth 128 words (TX and RX)
Controller Interface SPI (up to 26 MHz) / I2C (up to 1 MHz)
Supply Voltage 1.71V to 3.6V
Shutdown Current 1 µA
GPIOs 8 flexible with 20 mA drive
Operating Temperature -40°C to +85°C
Package TQFN-32 (5 x 5 x 0.75 mm)

Features

  • Dual UART in a single 5 x 5 mm TQFN package
  • 128-word TX and RX FIFOs for each channel
  • SPI up to 26 MHz and I2C Fast Mode Plus up to 1 MHz
  • Integrated PLL and fractional baud-rate generator
  • Automatic RTS/CTS hardware flow control
  • Automatic XON/XOFF software flow control
  • IrDA SIR and MIR encoder/decoder
  • 9-bit multidrop mode and special character detection
  • Logic-level translation on controller and transceiver interfaces
  • Shutdown and auto-sleep power management modes

Applications

  • Automotive infotainment systems
  • Industrial PLCs and PROFIBUS-DP
  • Power meters and smart grid equipment
  • Medical systems and point-of-sale terminals
  • Handheld devices and building automation

The MAX3109ETJ+T from Analog Devices is an advanced dual SPI/I2C UART, designed to bridge microcontroller buses to asynchronous serial interfaces such as RS-485, RS-232, and IrDA. Each UART channel features 128-word TX and RX FIFOs that significantly offload the host processor. The integrated PLL and fractional baud-rate generator provide high-resolution programmable baud rates up to 24 Mbps. Independent logic-level translation on both controller and transceiver interfaces ensures compatibility between different voltage domains. With automatic hardware and software flow control, 9-bit multidrop mode, and special character detection, this device simplifies serial communication system design.

The MAX3109ETJ+T operates as a bridge between a host controller (via SPI or I2C) and two independent asynchronous serial channels. The host writes TX data to the TX FIFO through the SPI/I2C interface, and the UART serializer transmits the data bit-by-bit on the TX pin. Received data on the RX pin is deserialized, checked for errors, and placed in the RX FIFO for the host to read. The fractional baud-rate generator and integrated PLL allow precise baud-rate synthesis from a wide range of reference clocks. The 128-word FIFOs buffer data between the host and serial ports, reducing interrupt frequency. Automatic flow control (RTS/CTS hardware and XON/XOFF software) manages data flow without host intervention. The IrDA encoder/decoder handles SIR and MIR infrared protocols.

Pin Name Type Function
1 TX0 Output UART0 transmit data
2 RX0 Input UART0 receive data
3 CTS0 Input UART0 clear-to-send input
4 RTS0 Output UART0 request-to-send output
5 GPIO0 I/O General purpose I/O
6 GPIO1 I/O General purpose I/O
7 GPIO2 I/O General purpose I/O
8 GPIO3 I/O General purpose I/O
9 TX1 Output UART1 transmit data
10 RX1 Input UART1 receive data
11 CTS1 Input UART1 clear-to-send input
12 RTS1 Output UART1 request-to-send output
13-16 GPIO4-GPIO7 I/O General purpose I/O
17 IRQ Output Interrupt request output
18 RST Input Reset input (active low)
19 CS/A0 Input SPI chip select / I2C address bit 0
20 MOSI/A1 Input SPI data in / I2C address bit 1
21 MISO/SDA I/O SPI data out / I2C data
22 SCLK/SCL Input SPI clock / I2C clock
23 XIN Input Crystal oscillator input
24 XOUT Output Crystal oscillator output
25-28 VCC/VL/GND Power Supply and ground pins
29 LDOEN Input Internal LDO enable
30-32 VCC/EP Power Supply / exposed pad (GND)
  • Industrial PLCs and PROFIBUS-DP communication systems
  • Automotive infotainment requiring multiple serial channels
  • Smart grid power meters with RS-485 metering interfaces
  • Medical systems needing isolated serial communication
  • Point-of-sale terminals with multi-port serial connectivity
Manufacturer Part Number Package Notes
Analog Devices MAX3107ETI+T TQFN-28 Single UART, similar feature set
Analog Devices MAX14830ETI+T TQFN-28 Quad UART, register compatible
NXP SC16IS752IPW TSSOP-28 Dual UART, SPI/I2C, 64-byte FIFO
TI TL16C752CIFN PLCC-44 Dual UART, 64-byte FIFO, parallel interface
Exar XR20M1172IL24 QFN-24 Dual UART, 64-byte FIFO, smaller
Recommend Parts

ADE7953ACPZ-RL

Single-phase energy metering IC, <0.1% error, SPI, shunt/CT, LFCSP-28

Brand:

Package:

LFCSP-28 (5×5 mm)
In stock:
5098pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD826ARZ-REEL7

Dual high-speed op amp, 50MHz, 350V/µs, drives unlimited Cload, 8-SOIC

Brand:

Package:

8-SOIC (3.9×5.0×1.5 mm)
In stock:
7183pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD5231BRUZ10-REEL7

1024-position nonvolatile digital potentiometer, 10kΩ, SPI, EEMEM, 16-TSSOP, REEL7 packaging

Brand:

Package:

16-TSSOP (5.0×4.4mm)
In stock:
9739pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD202JN

Transformer-coupled isolation amplifier, 750Vrms isolation, 2kHz bandwidth, 10-DIP, with integrated isolated power

Brand:

Package:

10-Pin DIP
In stock:
14100pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD7891AS1

8-ch 12-bit 454kSPS ADC DAS, bipolar inputs, parallel/serial, 44-MQFP, 5V supply

Brand:

Package:

MQFP-44 (10 x 10 mm)
In stock:
9131pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry

AD7226KRZ

Quad 8-bit voltage output DAC, 4-channel, MPU-compatible, 20-SOIC, no external trims

Brand:

Package:

SOIC-20 (Wide) (7.5 x 12.8 mm)
In stock:
5393pcs

Cargo cycle: 3~7 Days
The minimum order is 1

Go to Inquiry
Quality Assurance

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Shipping & Payment

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Service & Packaging

All electronic components we source from our partnered supply chains go through strict incoming inspections.Through careful testing, we ensure everything delivered to customers is genuine original parts and meets quality requirements.In addition, we keep complete inspection records to make the entire supply chain process clear and traceable.

Certification
We have obtained a number of professional certifications and built our own professional testing laboratory.This ensures that every product we deliver to our customers meets the highest quality requirements.We conduct tests in strict accordance with procedures to ensure stable product quality and accurate parameters.To guarantee genuine original parts, we also cooperate with reliable third-party testing institutions for strict quality inspection.We always attach great importance to quality and fully comply with industry standards, relevant regulations, and ISO 9001:2015 requirements.

Company
insights
Industries
All Products
Integrated Circuits
C&I Devices
Discrete
Memory Chips
MPUs & MCUs