Bus switches in UQTN packages slim down tablets and comms equipment
Quad- and dual-channel 4:1 and 2:1 bus switches from Diodes are available in an ultra-thin QFN (UQFN) package which is designed to make it easier for OEMs to increase PCB density and reduce product dimensions for PC notebooks and tablets as well as networking and telecommunications equipment.
The PI3B3253ZHD and PI3B3257ZHD (dual, 4:1) and the PI3CH480ZHD and PI5C3257ZHD (quad, 2:1) bus switches have previously only been available in the QSOP and TSSOP packages, offering pin-compatibility with industry standard 74 series logic devices. The ZHD suffix on the part number denotes the UQFN package.
The UQFN package measures 3.0 x 3.0 x 0.65mm high, which is significantly smaller than comparable devices in standard packages, says Diodes. This smaller size allows the bus switches to be added to almost any design, even those with a high level of component density.
Each channel in the bus switches can multiplex/demultiplex a single output from between two or four inputs. While the path for all channels is selected through common inputs, the channels benefit from a dedicated active-low enable control, allowing each channel to be operated independently. All devices offer tri-state operation, presenting high-impedance outputs when the enable pin is held high.
The UQFN package used by the devices includes a thermal pad for more efficient heat dissipation. In addition, all of the devices in the four variants feature a very low on-resistance of just 5Ohm, a near-zero propagation delay and low quiescent current.
The PI3B3253ZHD, PI3B3257ZHD, PI3CH480ZHD and PI5C3257ZHD are available now.
Diodes is a global manufacturer and supplier of application specific standard products within the broad discrete, logic, analogue and mixed-signal semiconductor markets. Diodes serves the consumer electronics, computing, communications, industrial, and automotive markets. Its product portfolio includes diodes, rectifiers, transistors, MOSFETs, protection devices, function-specific arrays, single gate logic, amplifiers and comparators, Hall-effect and temperature sensors, power management devices, including LED drivers, AC/DC converters and controllers, DC/DC switching and linear voltage regulators and voltage references. The company also supplies special function devices, such as USB power switches, load switches, voltage supervisors, and motor controllers. Diodes also has timing, connectivity, switching, and signal integrity solutions for high-speed signals.
The corporate headquarters and Americas’ sales office are located in Plano, Texas and Milpitas, California. Design, marketing, and engineering centres are located in Plano, Milpitas, Taipei, Taiwan, Taoyuan City, Taiwan, Zhubei City, Taiwan, Manchester, UK and Neuhaus, Germany. Wafer fabrication facilities are located in Manchester and Greenock, UK, and Shanghai, China. Diodes has assembly and test facilities located in Shanghai, Jinan, Chengdu, and Yangzhou, China, as well as in Hong Kong, Neuhaus, and Taipei. Additional engineering, sales, warehouse, and logistics offices are located in Taipei, Hong Kong, Manchester, UK, Shanghai, Shenzhen, China, Seongnam-si, South Korea, Munich, Germany and Tokyo, Japan, with support offices throughout the world.
