Find the right product for your application with these fast, easy online tools.
Black Box products can be conveniently purchasedthrough a broad range of qualified distributorsand resellers located around the globe.
Black Box is a qualified GSA supplier and acceptsall government purchasing cards.
Meet government requirements with our extensiveline of TAA compliant products.
Save with discounts tailored for first-time buyers,vertical markets, resellers, and more.
Sign up to receive your favoriteBlack Box catalogs free.
Get fast answers from one of our Experts.
Helping you is our priority at Black Box.You can contact us by phone, fax, email, or chat with one of our Experts for immediate assistance.
An Expert will call you within30 seconds. It's live and it'sfree.
Get fast answersfrom one of ourExperts.
Helping you is our priority at BlackBox. You can contact us by phone,fax, or email with one of our Experts for immediate assistance.
Local Sales Calls
1300 73 44 55
International Sales Calls
+61 3 9237 8100
(03) 9764 0673
+61 3 9764 0673
0800 653 219
0800 737 837
We’ll respond in 60 seconds or less!
Answered in 15 minutes or less!
We'll answer within 60 minutes or less!
Universal Asynchronous Receiver/Transmitters (UARTs) are integrated circuits that convert bytes from the computer bus into serial bits for transmission. By providing surplus memory in a buffer, UARTs help applications overcome... more/see it nowthe factors that can hinder system performance, providing maximum throughput to high-performance peripherals without slowing down CPUs.
Early UARTs such as 8250 and 16450 did not include buffering (RAM or memory). With the advent of higher-speed devices, the need for UARTs that could handle more data became critical. The first buffered UART was the 16550, which incorporates a 16-byte First In First Out (FIFO) buffer and provides greater throughput than its predecessors.
Manufacturers have been developing enhanced UARTs that continue to increase performance standards. These faster chips provide improvements such as larger buffers and increased speeds. Here are the rates of todays common UARTs:
UART FIFO Buffer Rate Supported
16550 16-byte 115.2 kbps
16554 16-byte 115.2 kbps
16650 32-byte 460.8 kbps (burst rate)
16654 64-byte 460.8 kbps (burst rate)
16750 64-byte 460.8 kbps (burst rate)
16850 128-byte 460.8 kbps (sustained rate)
16854 128-byte 460.8 kbps (sustained rate) collapse
The 16850 Universal Asynchronous Receiver/Transmitter (UART) features a 128-byte First In First Out (FIFO) buffer. When implemented with the appropriate onboard drivers and receivers, it enables your onboard serial ports... more/see it nowto achieve sustained data rates of up to 460.8 kbps. The 16850 UART includes automatic handshaking (RTS/CTS) and automatic RS-485 line control. It also features external clocking for isochronous applications, a performance enhancement not offered by earlier UARTs. collapse
The Universal Serial Bus (USB) hardware (plug-and-play) standard makes connecting peripherals to your computer easy. USB 1.1, introduced in 1995, is the original USB standard. It has two data rates:... more/see it now12 Mbps and 1.5 Mbps.
USB 2.0, or Hi-Speed USB 2.0, was released in 2000. It increased the peripheral-to-PC speed from 12 Mbps to 480 Mbps, or 40 times faster than USB 1.1. This increase in bandwidth enabled the use of peripherals requiring higher throughput, such as CD/DVD burners, scanners, digital cameras, and video equipment. It is backward-compatible with USB 1.1.
The newest USB standard, USB 3.0 (or SuperSpeed USB), (2008) provides vast improvements over USB 2.0. It promises speeds up to
4.8 Gbps, nearly ten times that of USB 2.0.
USB 3.0 has the flat USB Type A plug, but inside there is an extra set of connectors and the edge of the plug is blue instead of white. The Type B plug looks different with an extra set of connectors.
USB 3.0 adds a physical bus running in parallel with the existing 2.0 bus. USB 3.0 cable contains nine wires, four wire pairs plus a ground. It has two more data pairs than USB 2.0, which has one pair for data and one pair for power. The extra pairs enable USB 3.0 to support bidirectional async, full-duplex data transfer instead of USB 2.0’s half-duplex polling method.
USB 3.0 provides 50% more power than USB 2.0 (150 mA vs 100 mA) to unconfigured devices and up to 80% more power (900 mA vs 500 mA) to configured devices. Also, USB 3.0 conserves more power when compared to USB 2.0, which uses power when the cable isn’t being used. collapse
• Midplane architecture—Separate front and rear cards make changing interfaces easy.• Multiple functions—Supports line drivers, interface converters, fiber modems, CSU/DSUs, and synchronous modem eliminators.• Hot swappable—MicroRACK Cards can be replaced... more/see it nowwithout powering down, so you cut your networks downtime.• Two-, four-, and eight-port MicroRACKs—available for smaller or desktop installations. Theyre just right for tight spaces that cant accommodate a full-sized (16-port) rack.• Optional dual cards—Some Mini Driver Cards have two drivers in one card. One MicroRACK chassis can hold up to 32 Mini Drivers!• All standard connections available—DB25, RJ-11, RJ-45, fiber, V.35.• Choose you own power supply—120240 VAC, 12 VDC, 24 VDC, or 48 VDC. collapse
Delivering superior technical support is our highest priority. Depending on the products or services we provide for you, please visit your appropriate support area.
Get in touch and stay in touch with Black Box Network Services:
» Contact us
» Get Catalog
» Join our Mailing List to Receive White Papers, Case Studies, and Special Offers
» Follow Us
Black Box Network Services offers comprehensive communications and infrastructure solutions. Find out what we can do for you:
Find high quality products at the right price. Search and buy from our 118,000+ product catalog:
Black Box Network Services is the world's largest independent provider of communications, infrastructure, and product solutions. Learn more about us: