I2C
IC serial bus protocol speed grades; standard mode: 0.1 / 0.4, fast mode: 1.0 / 3.4 / 5.0 Mbit/s are maximum ratings. Also known as: Inter-Integrated Circuit
See Also: Serial, Serial Communications, LIN, Can bus, ExpressCard, Fieldbus, FireWire, RS-232, RS-485, PCI Express, Serial ATA, Serial Peripheral Interface, SMBus
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Product
Proximity, Light, RGB, and Gesture Sensor
APDS9960
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Add basic gesture sensing, RGB color sensing, proximity sensing, or ambient light sensing to your project with the Adafruit APDS9960 Proximity, Light, RGB and Gesture Sensor. When connected to your microcontroller (running our library code) it can detect simple gestures (left to right, right to left, up to down, down to up are currently supported), return the amount of red, blue, green, and clear light, or return how close an object is to the front of the sensor. This device uses an I2C interface so it's easy to wire up and use.
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Product
SIMRC - 16 x Uncommitted Reed Relay, SPST Screened
1010-R-16-1RF-5/1D
Reed Relay
Our small format embedded switching (SIM relay) cards offer a choice of switching configurations using low cost industry standard SIM connectors. They free the designer from the detail of routing complex switching circuits, you may select from a wide range of cards using the built in RS-232 and I2C interfaces. These low-cost embedded switching cards are intended to be mounted on to a simple motherboard. They may be used to construct very high density switching networks. SIM based switching cards also allow for very simple in-field maintenance.
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Product
Voltage Output D/A Converters
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Analog Devices offers a large family of resistor string and R-2R voltage output (VOUT) D/A converters (DACs). From 8 bits up to 20 bits of resolution, single to 40 channels, integrated or external reference, parallel, LVDS, serial SPI or I2C interface, with high temperature operation, we have a D/A converter to suit your application. We provide precision, buffered, and unbuffered rail-to-rail VOUT D/A converters with up to ±1 LSB INL and DNL specifications and excellent offset and gain error. Our D/A converters work well in a wide variety of open-loop or closed-loop systems—adjusting gain, offset, and many other signals.
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Product
SIMRC - 8 x 4 Matrix 2-Pole
1030-R-8-4-2-5/1D
Matrix Switch Module
Our small format embedded switching (SIM relay) cards offer a choice of switching configurations using low cost industry standard SIM connectors. They free the designer from the detail of routing complex switching circuits, you may select from a wide range of cards using the built in RS-232 and I2C interfaces. These low-cost embedded switching cards are intended to be mounted on to a simple motherboard. They may be used to construct very high density switching networks. SIM based switching cards also allow for very simple in-field maintenance.
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Product
Open Standard Module (OSM)
ROM-2620
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Advantech ROM-2620 OSM 1.1 Computer-on-Module is powered by NXP i.MX 8ULP SoC which includes up to 2 Arm Cortex-A35 cores in combination with one Cortex-M33 real timeprocessor and Vivante GC7000 nanoULTRA/GC328 graphics engine. It provides USB2.0, Fast Ethernet, MIPI-CSI, I2C, SPI, GPIO, PWM and MIPI DSI display for embedded applications
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Product
USB-8451, 250 kHz I2C, 12 MHz SPI I2C/SPI Interface Device
779553-50
Interface Module
The NI USB‑8451 is a master interface for connecting to and communicating with inter-integrated circuit (I2C), System Management Bus (SMBus), and serial peripheral interface (SPI) devices. With plug‑and‑play USB connectivity, the USB‑8451 is a portable solution to communicate with consumer electronics and integrated circuits. It also includes eight general-purpose digital I/O lines for a variety of applications, such as configuring the address of I2C devices or toggling LEDs. The USB‑8451 can be physically located more closely to I2C/SPI devices than PCI interfaces, reducing I2C bus length and minimizing noise problems. Additionally, the interface provides +5 V and GND to power circuits with no external power supply.
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Product
Robust RISC-based DIN-rail Fanless Embedded System With I.MX 6UL Processor, COM, SPI, I2C, 2 LANs And DIO (2-in/1-out)
IFB125
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The IFB125 is powered by the low-power Freescale i.MX6UL processor in the ARM® Cortex™-A7 micro architecture. It supports extended operating temperature ranging from -40°C to 70°C, and can withstand vibration up to 5G. Its flexible wide voltage range 9V - 48V DC power input with a lockable terminal block type connector also enhances its reliability in harsh environments. To meet most of Industrial IoT needs, the IFB125 supports multiple communication interfaces for maximum flexibility, including LAN, serial, USB, and digital I/O ports. The Industrial IoT gateway has 256MB onboard memory that features data transfer rates of DDR3-1600, as well as 4GB eMMC flash memory onboard for storage. This embedded IoT gateway platform is equipped with one PCI Express Mini Card slot and one SIM card slot. Additionally, it supports DB9 connectors with both SPI and I2C function as communication protocols to suit for specific applications
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Product
I2C/SPI Exerciser and Protocol Analyzer
PGY-I2C/SPI-EX-PD
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Prodigy Technovations Pvt. Ltd.
I2C Protocol Analyzer and SPI Protocol Analyzer (PGY-I2C/SPI-EX-PD) are the Protocol Analyzers with multiple features to capture and debug communication between host and design under test. PGY-I2C/SPI-EX-PD is the leading instrument that enables the design and test engineers to test the respective I2C or SPI designs for its specifications by configuring the PGY-I2C/SPI-EX-PD as Master/Slave, generating I2C/SPI traffic and decoding the I2C/SPI protocol decode packets
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Product
SparkFun MicroMod Environmental Function Board
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The SparkFun MicroMod Environmental Function Board adds additional sensing options to the MicroMod Processor Boards. This Function Board includes three sensors to monitor air quality (SGP40), humidity & temperature (SHTC3), and CO2 concentrations (STC31) in your indoor environment. To make it even easier to use, all communication is over the MicroMod's I2C bus!
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Product
Alchitry Au FPGA Development Board (Xilinx Artix 7)
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The Alchitry Au is the "gold" standard for FPGA development boards and it's possibly one of the strongest boards of its type on the market. FPGAs, or Field-Programmable Gate Arrays, are an advanced development board type for engineers and hobbyists alike to experience the next step in programming with electronics. The Au continues the trend of more affordable and increasingly powerful FPGA boards arriving each year. This board is a fantastic starting point into the world of FPGAs and the heart of your next project. Finally, now that this board is built by SparkFun, we added a Qwiic connector for easy I2C integration!
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Product
Logic Analyzer & Digital Pattern Generator
ScanaQuad Series
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ScanaQuad (SQ) is a series of high performance 4 channels logic analyzers and digital pattern generators. They are designed to be your best companion when working on serial protocols like UART, SPI, I2C, 1-Wire, USB, I2S, CAN, LIN, RS232, RS485, and more. With ScanaQuad Logic Analyzers, you can capture signals, you can play them back, and you can even build genuine test signals and generate them!
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Product
Interface Adapter. USB Solution
U2C-11
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Dimax USB to I2C Bridge device - U2C-11 converts USB transactions to I2C Master transactions. U2C-11 turns your PC running Windows or Linux OS into comprehensive I2C Bus master.
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Product
SparkFun GPS Breakout
XA1110 (Qwiic)
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The SparkFun XA1110 GPS Breakout is a small I2C-supported module built for easy hookup, thanks to our Qwiic Connect System. Equipped with the XA1110 GPS module from GTOP, this board utilizes the MediaTek MT3333 chipset, loaded with specialized SparkFun firmware that enables both I2C and serial ports simultaneously. Using I2C means you won’t have to tie up your serial port with GPS, leaving it open to other possibilities.
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Product
Smart Card Reader
UTC-100P-S
Card Reader
International Standard: Comply with PC/SC 1.0 standard and EMV L1. CPU Card: Comply with ISO7816-1,2,3,T=1 and T=0 protocol. Memory Card: Synchronous 2-line, 3-line and I2C interface.
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Product
Ambient Light Sensors
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Renesas' ambient light sensors optimize display backlighting, enhance energy efficiency, and improve user experience with ultra-low light sensitivity, low power consumption, and precise spectral response. Our offerings include light-to-digital sensors with IR blocking filters and I2C interfaces, and light-to-analog solutions integrating photodiodes and amplifiers. Designed for automotive, industrial, and medical applications, these sensors deliver reliable performance even in demanding environments.
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Product
SIMRC - 8 x 2 Matrix 1-Pole
1030-R-8-2-1-5/1D
Matrix Switch Module
Our small format embedded switching (SIM relay) cards offer a choice of switching configurations using low cost industry standard SIM connectors. They free the designer from the detail of routing complex switching circuits, you may select from a wide range of cards using the built in RS-232 and I2C interfaces. These low-cost embedded switching cards are intended to be mounted on to a simple motherboard. They may be used to construct very high density switching networks. SIM based switching cards also allow for very simple in-field maintenance.
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Product
Multi-protocol USB Type-C Analyzer
Type-C Tracker
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Protocol and Electrical Analysis Tool for Type-C Communications Standards. All-in-One: Concurrent and tightly synchronized capture of USB Power Delivery protocol, Type-C voltage tracking (Vconn, Vbus, SBU, and CC), USB 2.0, Thunderbolt 3 UART and DisplayPort auxiliary (AUX) signaling over the Type-C SBU lines, alternate (ALT) mode support for DisplayPort, HDMI, and Thunderbolt, and capture and decoding of Serial Wire Debug (SWD) protocol, UART, Serial Peripheral Interface (SPI) I2C vendor-specific protocols, and Type-C Port Controller Interface traffic over I2C.
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Product
USB-8452, 3.3 MHz I2C, 50 MHz SPI I2C/SPI Interface Device
781964-03
Interface Module
The NI USB‑8452 is a master interface for connecting to and communicating with inter-integrated circuit (I2C) and serial peripheral interface (SPI) devices. With plug‑and‑play USB connectivity, the USB‑8452 is a bus-powered, portable solution to communicate with consumer electronics and integrated circuits. It also includes eight general-purpose digital I/O lines for a variety of applications, such as configuring the address of I2C devices, toggling LEDs, or strobing convert and data ready lines common to analog converter chips. You can physically place the USB‑8452 more closely than PCI interfaces to I2C/SPI devices, which reduces I2C bus length and minimizes noise problems. Additionally, the interface provides +5 V and GND to power circuits with no external power supply.
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Product
ARM 9 System on Module
MS 1515
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- Processor: LPC3250 processor with ARM 9 core running at 266 MHz SDRAM- Memory: DDR2 256 MB (scalable to 512 MB)- Flash Memory: NAND flash 512 MB- Display & Graphics: Programmable color LCD controller supports up to a TFT interface- Touch screen: Integrated touch screen controller- Network Support: 10/100 Base-T Ethernet PHY- PC Interface: One USB 2.0 high-speed On-the-Go interface- Serial Interfaces: Up to four external UARTs- + CAN 2.0B controller- + Three I2C ports- + Three SPI ports- GPIO: Programmable I/O depending on peripheral requirements- Mechanical: 60 mm wide x 60 mm long x 5.4 mm high
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Product
MIPI I3C Sensor Controller
I3C
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The main purpose of MIPI I3C is to standardize sensor communication, reduce the number of physical pins used in sensor system integration and support low-power, high-speed and other critical features supported by I2C and SPI.
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Product
I2C Adapter MS
LAN
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*No driver necessary*Integration of communication via DLL and TCP / IP & UDP protocol possible*Open interface description enables communication without a DLL*Supports TCP / IP, UDP and DHCP
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Product
Accelerometor, Gyro, Magnetometer Breakout Board
SEN-38001
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The LSM9DS1 is a highly configurable, flexible and precise motion sensing solution from ST Microelectronics - the latest in a wide-ranging inertial product line. It integrates a 3-axis accelerometer, 3-axis gyroscope and 3-axis magnetometer into a single IC , giving you a full nine degrees of freedom (9-DOF) in a tiny 3mm x 3.5mm package. Even with support components, square mounting pattern and connection breakouts for both SPI and I2C, this board is barely the size of a quarter.
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Product
SparkFun Altitude/Pressure Sensor Breakout
MPL3115A2
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Life has its ups and downs, so why not measure them? The MPL3115A2 is a MEMS pressure sensor that provides Altitude data to within 30cm (with oversampling enabled). The sensor outputs are digitized by a high resolution 24-bit ADC and transmitted over I2C, meaning it's easy to interface with most controllers. Pressure output can be resolved with output in fractions of a Pascal, and Altitude can be resolved in fractions of a meter. The device also provides 12-bit temperature measurements in degrees Celsius.
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Product
Qwiic Connect System
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An ecosystem of I2C sensors, actuators, shields, and cables that make prototyping faster and less prone to error.
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Product
SparkFun Environmental Combo Breakout
CCS811/BME280 (Qwiic)
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The SparkFun CCS811/BME280 Environmental Combo Breakout takes care of all your atmospheric-quality sensing needs with the popular CCS811 and BME280 ICs. This unique breakout provides a variety of environmental data, including barometric pressure, humidity, temperature, TVOCs and equivalent CO2 (or eCO2) levels. To make it even easier to use this breakout, all communication is enacted exclusively via I2C, utilizing our handy Qwiic system. However, we still have broken out 0.1" spaced pins in case you prefer to use a breadboard.
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Product
Power Monitors
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Analog Devices’ power monitoring amplifiers provide an integrated solution for digital current and voltage measurement via an on-chip, 12-bit analog-to-digital converter (ADC), communicated through an I2C interface. Leveraging ADI’s precision analog design techniques, ADI’s products are twice as precise as competing devices, offering best-in-class accuracy (<±0.8%). The power monitors complete the industry’s only monitor and sequencer family to deliver <±1% accuracy for 2 to 12 supplies.
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Product
Serial EEPROM
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STMicroelectronics is the world's #1 supplier of Serial EEPROM thanks to development of leading-edge technology, recognized product robustness and high manufacturing capacity. ST focuses on the availability of the complete portfolio with short lead times, high flexibility in volume and worldwide distribution through selected partners. ST's comprehensive portfolio offers reliable SPI, I2C and Microwire products in SO8N, TSSOP8, DFN2X3, DFN5, WLCSP and bare die packages.
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Product
QSeven
ROM-7510
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*TI Sitara AM5728 Dual core cortex-A15 1.5GHz high performance processor*Onboard DDR3 memory 2 GB and eMMC Flash 8 GB*Support 1 LVDS, 1 HDMI, 1 USB2.0 OTG, 4 USB2.0 HOST, 1 USB3.0,2 UART, 1 CAN, 1 SATA, 2 I2C, 1 I2S, 2 PCIE 1 lane,*Operating temperature 0 ~ 60 °C / -40 ~ 85 °C*Supports Linux Yocto
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Product
SparkFun LiPo Fuel Gauge
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LiPo batteries are a great way to power your projects. They're small, lightweight, and pack a pretty good punch for their size. Unfortunately, even the best batteries eventually run low on power and when they do it's often unexpected (and at the worst time). Don't be caught by surprise next time your board suddenly powers-down! The SparkFun LiPo Fuel Gauge connects your battery to your project and uses a sophisticated algorithm to detect relative state of charge and direct A/D measurement of battery voltage. In other words, it tells your microcontroller how much 'fuel' is left in the tank. The LiPo Fuel Gauge communicates with your project over I2C and an alert pin also tells you when the charge has dropped below a certain percentage.
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Product
Electrical Interface
QSFP-DD 200G
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Eoptolink Technology Inc., Ltd.
QSFP-DD 200G Eoptolink’s EOLD-162HG-E-10-1 QSFP-DD CWDM4, 8x25G Optical transceiver module are designed for use in 200 Gigabit links over 10km singlemode fiber. They are compliant with the QSFP-DD MSA. Digital diagnostics functions are available via the I2C interface, as specified by the QSFP-DD MSA.





























