Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Attn:	Filing Desk

Gentlemen:

By means of this letter, I authorize Thomas R. Melendrez and
J. Scott Kamsler, or either of them individually, to sign on
my behalf all forms required under Section 16(a) of the
Securities Exchange Act of 1934, as amended, relating to
transactions involving the stock or derivative securities of
Exar Corporation (the "Company").  Either such individual
is accordingly authorized to sign any Form 3, Form 4,
Form 5 or amendment thereto which I am required to file
with the same effect as if I had signed them myself.

This authorization shall remain in effect until revoked in
writing by me.

Very truly yours,

Signed:		Trong Vu

Typed Name:	Trong Vu
Date Signed:		October 12, 2007