With various standards and charging technologies at work, it is much harder than it should be to work out what a cable can do. There are a few things worth knowing when shopping. Show
USB Standards: The Universal Serial Bus (USB) standard dates to 1996 but has seen many new standards, revisions, and connector types in the years since. Instead of running through all of them here, we try to highlight what matters. Connectors: While USB-C is mercifully becoming a standard connection type, you want cables with connectors that fit your existing devices. Today, that still might mean USB-A, Lightning, or even MicroUSB. Remember that the capabilities of any cable are limited to its oldest connection type. Data: The data transfer speed is always in megabits per second (Mbps) or gigabits per second (Gbps). You'll know the speed a cable should be capable of by the standard:
Power: While cable manufacturers always list the maximum charging rate, your device will determine how much power to draw, so it's important to know what standards it supports and combine your cable with the correct power adapter. The charging rate of a cable is measured in Watts (W). Sometimes manufacturers will list specifications on the cable in tiny print. If there’s no W listed, you can calculate it by multiplying the voltage (V) and the current (A), assuming they are listed. USB-A ports are limited to 12 watts. USB-C ports can go up to 240 watts (they used to be limited to 100W), but this depends on the device. For example, USB-C typically delivers 18 watts to a phone. Apple’s Lightning ports can work with USB-A or USB-C cables. Thunderbolt was a proprietary interface developed by Intel and Apple, but it's now open for royalty-free use (still certified by Intel). With Thunderbolt 3, the standard adopted the USB-C connector and is capable of data transfer speeds up to 40 Gbps and can deliver 100 watts of power using the PD standard. Thunderbolt 4 brings various improvements mostly related to the video signal (support for two 4K displays or an 8K display). It also supports the USB 4 standard and is backward compatible with previous standards. We plan to test Thunderbolt and USB 4 cables over the next few weeks. The Power Delivery (PD) standard is as close as we have to a common standard. A few manufacturers, like OnePlus, Oppo, and Xiaomi, still have proprietary charging standards. Then there's Qualcomm’s Quick Charge (QC) standard, which was the most popular for phones for many years, although Quick Charge 4+ supports PD. Even PD has a variant called Programmable Power Supply (PPS), which is part of the USB PD 3.0 standard. PPS allows for real-time adjustments to maximize efficiency and charge phones like Samsung's Galaxy S22 range at up to 45W instead of the usual 18W. Cable Certification: There are a few different types of cable certification. When a cable is certified, that usually means it was independently tested and conforms to specific standards. It gives you, as a buyer, peace of mind that your cable performs as the manufacturer claims. Certification can be expensive, so many cable manufacturers shun it, but that doesn’t necessarily mean their cables are poor quality. The USB Implementers Forum (USB-IF) is a non-profit organization dedicated to advancing USB technology. Run by members like Apple, Google, HP, Microsoft, and Intel, it sets specifications and offers certification. If a cable is certified by the USB-IF, it has been tested to ensure it complies with its standards. Apple has its own Made for iPhone (MFi) certification for Lightning cables. Ubiquitous to modern society, USB tech can be found in at least one or more devices people use on a daily basis. However, USB cables come in a variety of connections, most of which are incompatible with the others. This makes replacing a USB cable a troublesome task, especially when the differences between each may seem trivial to the inexperienced. For instance, while micro B and mini USBs may use synonymous terms, you cannot simply use one plug to connect to the other's port. To make matters even more confusing, the USB tech industry is constantly evolving that even the same plug type can differ between each version of USB, simultaneously influencing the plug's performance. We have put together this exhaustive guide to help you untangle all the nuanced idiosyncrasies between the different types of USB cables on the market.  USB Type AUSB Type BUSB Type CUSB-C or USB Type-C connector is the newest USB interface came to the market along with the new USB 3.1 standard. Different from previously mentioned USB A type and B type connector, USB C Type connector can be used on both host controller ports and devices which use upstream sockets. In the last few years a numbers of laptops and cellphones have appeared on the market with C style USB connectors. USB Type C connector is compatible with USB 2.0, 3.0, 3.1 Gen 1 and Gen 2 signals. A full feature USB 3.1 Gen 2 C to C cable is able to transmit data at maximum 10 Gbps with enhanced power delivery of up to 20V, 5A (100W) and to support DisplayPort and HDMI alternate mode to transfer video and audio signal. Related Products:
USB Mini BUSB Micro BThe micro USB B connector essentially a scaled down form of the mini USB which allowed mobile devices to get slimmer while still maintaining the ability to connect to computers and other hubs. The micro B type connector holds 5 pins to support USB OTG, which permits smartphones and other similar mobile devices to read external drives, digital cameras, or other peripherals as a computer might. Note that to enable OTG feature, special wiring connection needs to be implemented in the cable assembly. On Oct. 22, 2009, the international Telecommunication Union (ITU) announced to include Micro-USB interface into the Universal Charging Solution (UCS) that has been adopted broadly by industry. Related Products:
USB 3.0 Type AUSB 3.0 Type BUSB 3.0 Micro BUSB 3.0 Internal Connector (20 Pin)Developed by Intel, USB 3.0 internal connector cables are usually used to connect the external USB SS ports on the front panel to the motherboard. The 20 pin internal socket contains two lines of USB 3.0 signal channels, which allows maximum two individual USB 3.0 ports without sharing one channel data bandwidth. Related Products:
USB 3.1 Internal ConnectorDeveloped by Intel, USB 3.1 internal connector cables are designed for connecting motherboard to front panel USB ports. Similar to previous USB 3.0 internal connector, the new generation internal connector also has a 20 pin header version that support single Type C port or dual Type A connections but with a reduced form factor and stronger mechanical latch design. An 40 pin header version internal connector was also introduced to support two full feature Type-C ports. What is the maximum data transfer speed USB 2.0 can handle?USB 1.0: 1.5 Mbps. USB 1.1: 12 Mbps. USB 2.0: 480 Mbps. USB 3.0 and USB 3.1: 5 Gbps.
What is the maximum data transfer speed USB 3.0 can handle?The theoretical transfer speed of USB 3.0 is 4.8 Gbit/s (600MBps) vs. 480 Mbit/s (60MBps) which is a 10X improvement. Sustained transfer speeds (real life) for external hard drives are about 85MBps for USB 3.0 and about 22MBps for USB 2.0, so about a 5X improvement but still a significant advancement in transfer speed.
What is usb2?USB 2.0 was introduced in October 2000 and is the second generation of Universal Serial Bus (USB). It was the standard version of the USB interface that was commonly used from 2000 until the release of USB 3.0 in 2008. USB is one of the most widely used external interfaces of its kind.
Which type of DVD media has a storage capacity of 7.95 GB group of answer choices?The dual layered discs (DVD+R9 and DVD-R9) can hold 7.95GB and double sided dual layer (called dvd-18) can hold 15.9GB.
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