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High-Density, High-Pin-Count Flexible SMD Connector for High-Speed Data Bus
Shinichi SASAKI Tohru KISHIMOTO
IEICE TRANSACTIONS on Electronics
Publication Date: 1994/10/25
Print ISSN: 0916-8516
Type of Manuscript: PAPER
components, connector, surface mount device (SMD), FPC cable, MCM,
Full Text: PDF(786.6KB)>>
This paper describes a high-density, high-pin-count flexible SMD connector used for high-speed data buses between MCMs or daughter boards. This connector consists of a flexible film cable interconnection with accurately controlled characteristic impedance, and a contact housing composed of double-line contacts and SMD type leads. It has 98 contacts each with a pitch of 0.4 mm. The connector mounting area is 6 mm wide and 23 mm long. The flexible cable has a double-sided triple-parallel micro stripline structure with an insertion force of less than 2.9 kgf and characteristic impedance of 48 to 50 Ω. Insertion loss is -0.5 dB at 600 MHz and crosstalk noise is less than 110 mV at 250 ps rising time. This connector can be used for high-speed data transmission of up to 300 ps rising time.