High-Density, High-Pin-Count Flexible SMD Connector for High-Speed Data Bus

Shinichi SASAKI  Tohru KISHIMOTO  

Publication
IEICE TRANSACTIONS on Electronics   Vol.E77-C   No.10   pp.1694-1701
Publication Date: 1994/10/25
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Components
Keyword: 
components,  connector,  surface mount device (SMD),  FPC cable,  MCM,  

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Summary: 
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.