SMT connectors ensure high contact density on PCBs, says W+P
High-speed board-to-board connectors for data rates of up to 28Gbytes per second make up the 5088 series from W+P. They are designed for use whenever PCBs need to be stacked compactly in restricted spaces. Board-to-board connectors have a low component height to ensure that the PCB distance is negligible. The increase in the data rate demanded is almost in direct proportion to the decrease in the housing size, observes W+P. In response it has developed the surface mount technology (SMT) 5088 series for 28Gbyte per second operation in embedded computing or industrial applications.
The company’s 5055 SMT series has a maximum performance of 25Gbyte per second. The 5088 series allows users to select either the fully loaded 14Gbyte per second version or the 28Gbyte per second model, which is fitted in pairs. In this case, the high frequencies can be transmitted differentially. The differential transmission provided by the paired arrangement of the pins is far less sensitive to interference because the coupled pins each send out a signal with opposing polarity at the same time.
The connectors, which are arranged in the vertical direction, have a component height of 2.05mm (female) and 4.27mm (male). This results in a PCB distance of 5mm. In addition, the dense contact design in pitches of 0.5mm (5055) or 0.8mm (5088) allows developers to come up with space-saving configurations that require the PCBs to be stacked within the device.
Created as a box header on the plug side, the special housing geometry of the board to board components allows for reverse polarity-protected connection. Here, the ground bouncing is provided by a centralised, electrically conductive surface in the male contact area and by spring contacts on the socket side.
Double-row connectors with 60, 120, 180 (5055) and 40, 80, 120 (5088) contacts are available as fully fitted versions. The paired 5055 offers 40, 80 and 120 contacts, while the paired 5088 offers 28, 56 and 84 contacts.
Locating pegs take are claimed to ensure flawless alignment at specified positions on the PCB. Both series are suitable for at least 100 mechanical mating cycles without loss of stability. Depending on the configuration, the contacts can be used for a current rating of up to 2A. In the case of the ground plane, the value is 7.8A.
The taped delivery option with film pad facilitates fully automatic assembly with processing during the SMT production process. The insulator consists of thermoplastic material in accordance with UL94 V-0. Reliable functionality is guaranteed in a temperature range from -55 to +125 degrees C.
