I’m assuming you need a chart for vegetable seeds. If so, “Vegetable Garden Seed Storage and Germination Requirements” is at http://extensionpublications.unl.edu/assets/pdf/g2090.pdf.
The tabloid “Growing Your Own” may also be useful to you as it contains a general overview of growing vegetables. (https://catalog.extension.oregonstate.edu/sites/catalog/files/project/pdf/em9027.pdf) Page 7 is a chart of planting dates. (Locate your planting Zone in Oregon by using the sidebar on page 6.)
Enjoy your garden!