TCA9554 is a digital port expander for the I2C bus. Free Technical Library News

NEWS OF SCIENCE AND TECHNOLOGY, NOVELTY IN ELECTRONICS
Free technical library / timeline

TCA9554 Digital Port Expander for I2C Bus

18.03.2015

The TCA9554PWR Digital Port Expander (I/O Expander) from Texas Instruments allows you to add 8 bidirectional GPIO lines to any product that has an I2C or SMBus interface.

The TCA9554PWR is compatible with any type of 1,5V to 5,5V microcontroller and provides a simple solution for applications that require additional lines to connect pushbuttons, switches, LEDs and relays. The output current of one port can reach 25mA. When power is applied, all ports are set to their default state without any bounce. In standby mode, the TCA9554PWR draws between 200 nA and 1,6 µA depending on the supply voltage.

A feature of the TCA9554PWR is the ability to generate an interrupt when the status of a port configured for input changes. The presence of three hardware address lines (A0, A1 and A2) allows you to combine up to 8 expander chips on the same I2C bus. TCA9554PWR can work on I2C both in standard mode (100 kHz) and in "fast" mode (400 kHz).

The pinout of the TCA9554PWR is the same as the popular PCF8574.

If you need to increase the number of I / O lines up to 16 ports, you can use the TCA9555 and TCA9535 chips. The TCA16 version of the 9535-port expander has a reduced standby current in Stand-By mode (no more than 3 μA).

<< Back: Warm nanoparticles stimulate the brain 18.03.2015

>> Forward: Robot grower 17.03.2015

Latest news of science and technology, new electronics:

The existence of an entropy rule for quantum entanglement has been proven 09.05.2024

Quantum mechanics continues to amaze us with its mysterious phenomena and unexpected discoveries. Recently, Bartosz Regula from the RIKEN Center for Quantum Computing and Ludovico Lamy from the University of Amsterdam presented a new discovery that concerns quantum entanglement and its relation to entropy. Quantum entanglement plays an important role in modern quantum information science and technology. However, the complexity of its structure makes understanding and managing it challenging. Regulus and Lamy's discovery shows that quantum entanglement follows an entropy rule similar to that for classical systems. This discovery opens new perspectives in the field of quantum information science and technology, deepening our understanding of quantum entanglement and its connection to thermodynamics. The results of the study indicate the possibility of reversibility of entanglement transformations, which could greatly simplify their use in various quantum technologies. Opening a new rule ... >>

Mini air conditioner Sony Reon Pocket 5 09.05.2024

Summer is a time for relaxation and travel, but often the heat can turn this time into an unbearable torment. Meet a new product from Sony - the Reon Pocket 5 mini-air conditioner, which promises to make summer more comfortable for its users. Sony has introduced a unique device - the Reon Pocket 5 mini-conditioner, which provides body cooling on hot days. With it, users can enjoy coolness anytime, anywhere by simply wearing it around their neck. This mini air conditioner is equipped with automatic adjustment of operating modes, as well as temperature and humidity sensors. Thanks to innovative technologies, Reon Pocket 5 adjusts its operation depending on the user's activity and environmental conditions. Users can easily adjust the temperature using a dedicated mobile app connected via Bluetooth. Additionally, specially designed T-shirts and shorts are available for convenience, to which a mini air conditioner can be attached. The device can oh ... >>

Energy from space for Starship 08.05.2024

Producing solar energy in space is becoming more feasible with the advent of new technologies and the development of space programs. The head of the startup Virtus Solis shared his vision of using SpaceX's Starship to create orbital power plants capable of powering the Earth. Startup Virtus Solis has unveiled an ambitious project to create orbital power plants using SpaceX's Starship. This idea could significantly change the field of solar energy production, making it more accessible and cheaper. The core of the startup's plan is to reduce the cost of launching satellites into space using Starship. This technological breakthrough is expected to make solar energy production in space more competitive with traditional energy sources. Virtual Solis plans to build large photovoltaic panels in orbit, using Starship to deliver the necessary equipment. However, one of the key challenges ... >>

New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

Random news from the Archive

Spectroscopy in a cave 13.11.2011

French archaeologists, in collaboration with physicists from the University of Pretoria (South Africa), are studying wall paintings in caves, created about 3000 years ago by local Bushmen tribes.

Scientists delivered a spectrometer to the caves located near the city of Durban to determine the composition of the mineral paints of ancient drawings. In the future, archaeologists hope to use a laser analyzer to find out which organic components were added to the composition of the paints for better adhesion to the stone. Presumably this is blood, fat, egg yolk and possibly snake venom.

See full Archive of science and technology news, new electronics

All languages of this page

Home page | Library | Articles | Website map | Site Reviews