USB (Universal Serial Bus) Tutorial What is USB? Universal Serial Bus is a high speed connectivity standard enabling simple plug and play connections to devices such as printers, digital cameras, camcorders, keyboards and mice. The standard is supported by many leading suppliers of computers and peripherals. An attractive advantage of USB is that the devices are hot pluggable meaning a live connection/disconnection without data loss or interruption. Currently there are two relevant revisions of USB, 2.0 and 3.0. USB 3.0 is an emerging standard that allows large amounts of data or video to be transferred up to 10 times faster than USB 2.0. However, USB 2.0 is still much more common in the marketplace and is expected to remain relevant for applications that do not require large amounts of data to be moved. It is important to note that in order to take advantage of the increased bandwidth USB 3.0 provides all components must be 3.0 compliant – host, cables and peripherals. Otherwise the bandwidth will perform to the lowest rated component. Applications for USB Initially USB products were used mainly to link computers and their associated peripherals. Today USB is used in nearly every market including communications, entertainment, medical and automotive. USB ConnectorsThe USB specification requires a host system to be equipped with an A type jack. The B/mini B type jack is typically found on peripheral devices requiring detachable cables. Therefore, detachable USB cables are configured as an A to B/mini B male combination which prevents improper bus configurations and topology miswiring. For a complete listing of USB Connectors, see the Connector Chart at L-com.com/ConnectorChart USB Cable Construction L-com’s CSMUAA, CSMUAB, CSMUAX and CSUZAB cable series use 20 AWG power conductors. All CSMUAMB (Mini B) cable series use 28 AWG power conductors. ECUSB series uses 26 AWG power conductors, WPUSB series uses 24 AWG power conductors. USB TopologyUSB is a serial, bi-directional bus that can be layered in tiers or star shaped with the use of a hub. USB does not require terminators or manual addressing. USB Tier Topology USB Star Topology Technical Data: USB Limitations USB Revision Max. Transmission Rate Max. Cable Length 3.0 4.8 Gbps 5 meters 2.0 480 Mbps 5 meters 1.1 12 Mbps 5 meters Selecting the right USB cable assembly for your application L-com takes pride in having a large variety of USB cables. The following selection guide is intended to assist you in selecting the right cable for your need. Cable Series Connector Types Photo Color Power Lead Wire AWG Distinguishing Characteristics CSMUAB Male Type A - Male Type B Light Gray 20 Superior electrical performance compared to industry standard cables - 20 AWG power leads provide maximum current/power transfer. CSMUAA Male Type A - Male Type A Light Gray 20 Superior electrical performance compared to industry standard cables - 20 AWG power leads provide maximum current/power transfer. ECUSBAB Male Type A - Male Type B Gray 26 Industry standard USB cable suitable in most applications and comparable to competitors cables. CSMUAX Male Type A - Female Type A Light Gray 20 Extension cable. Superior electrical performance compared to industry standard cables - 20 AWG power leads provide maximum current/power transfer. CSUZAB Male Type A - Male Type B Black 20 Low Smoke Zero Halogen (LSZH) jacket and backshell material significantly reduce the amount of toxic and corrosive gases emitted during combustion. 20 AWG power leads provide maximum current/power transfer. CSMUAMB4 Male Type A - Male Mini-Type B 4 Position Black 28 Typically used with digital cameras, MP3 players and other small portable devices. CSMUAMB5 Male Type A - Male Mini-Type B 5 Position Black 28 Most common mini USB connector. Used with digital cameras, MP3 players, cell phones and other small portable devices as well as some GPS units. ECF504-XXAAS Female Type A Panel Mount - Male Type A Light Gray 20 Efficiently allows USB cables to be passed through a panel or enclosure. Utilizes metalized plastic housing. 20 AWG power leads provide maximum current/power transfer. ECF504-5M Female Type A Panel Mount - Cut End Light Gray 20 Efficiently allows USB cables to be passed through a panel or enclosure. Utilizes metalized plastic housing. Cut end allows user to configure their own assembly or hard wire. 20 AWG power leads provide maximum current/power transfer. UPMAA Female Type A Panel Mount - Male Type A Light Gray 20 Efficiently allows USB cables to be passed through a panel or enclosure. Utilizes molded PVC housing. 20 AWG power leads provide maximum current/power transfer. UPMA5 Female Type A Panel Mount - 5 Pin Female Header Connector Gray 26 Efficiently allows USB cables to be passed through a panel or enclosure. Utilizes molded PVC housing. 5 pin connector mates to standard 0.100" centerline headers. CSMUAXMT-2M Female Type A Mounting - Male Type A Light Gray 20 Extends USB computer port for easy mounting via screws or double sided foam tape. 20 AWG power leads provide maximum current/power transfer. COILUAB Latching Male Type A - Male Type B Black 28 Latching A connector provides secure connection. Retractable polyurethane cord provides longer life and saves space when compared to standard cables. WPUSBAB Waterproof Male Type A - Male Type B Black 24 Waterproof A male mates with waterproof A female connectors to protect against dust, moisture and temporary immersion under water. IP67 rated. WPUSBAX Waterproof Female Type A - Male Type A Black 24 Waterproof A female is panel mountable. When mated with waterproof A male or capped with WPUSB-CVR, provides protection against dust, moisture, and temporary immersion under water. IP67 rated. WPUSBBA Waterproof Female Type B - Male Type A Black 24 Waterproof B female is panel mountable. When mated with waterproof B male or capped with WPUSB-CVR, provides protection against dust, moisture, and temporary immersion under water. IP67 rated. WPUSBBB Waterproof Male Type B - Male Type B Black 24 Waterproof B male mates with waterproof B female connectors to protect against dust, moisture and temporary immersion under water. IP67 rated. WPUSBAF Waterproof Female Type A - Wire Leads Various 24 Waterproof A female is panel mountable. When mated with waterproof A male or capped with WPUSB-CVR, provides protection against dust, moisture and temporary immersion under water. IP67 rated. Wire leads allow user to configure their own assembly or hard wire. WPUSBBF Waterproof Female Type B - Wire Leads Various 24 Waterproof B female is panel mountable. When mated with waterproof B male or capped with WPUSB-CVR, provides protection against dust, moisture and temporary immersion under water. IP67 rated. Wire leads allow user to configure their own assembly or hard wire. CAU3AA Male Type A - Male Type A Blue 24 High speed USB 3.0 cables used for data storage/backup and applications where large volumes of data require fast transfer. Includes HD movie and other multimedia applications. CAU3AB Male Type A - male Type B Blue 24 Used to connect high speed USB 3.0 host to peripheral devices such as media players, data storage devices and other USB 3.0 systems. CAU3AMICB Male Type A - Male Micro B Blue 24 Used to connect high speed USB 3.0 devices including mobile devices such as cell phones, GPS units, PDAs and digital cameras. Used for high speed voice, video, and data downloads of up to 4.8 Gbps. CAU3AX Male Type A - Female Type A Blue 24 Used to extend high speed USB 3.0 Type A cables. Can be used with host or peripheral devices such as a USB 3.0 hub. ECF504-30 Male Type A - Female Type A Blue 24 Used in ECF panel mount applications where a USB Type A male to female extension connection is required. Can be used in enclosure and panel mount designs.

ΠΗΓΗ