We can supply S640B , send us a request quote to request S640B pirce and lead time.Chipdigger.com a professional electronic components distributor. With 10+ Million line items of available electronic components can ship in short lead-time, over 250 thousand part numbers of electronic components in stock for immediately delivery, which may include part number S640B.The price and lead time for S640B depending on the quantity required, availability and warehouse location.Contact us today and our sales representative will provide you price and delivery on Part S640B.We look forward to working with you to establish long-term relations of cooperation