Xcerra Corporation (formerly LTX-Credence Corporation) is a semiconductor Automatic Test Equipment (ATE) vendor, founded in 1976 and headquartered in Norwood, MA (Greater Boston area).

The focus of the company is the design and development of ATE for the semiconductor marketplace, but it distinguished itself in the early days as a provider of functional and parametric testers for discrete component RF products. Today, LTX offers test platforms capable of testing mixed signal (analog & digital) devices.

LTX was founded by Graham Miller, Roger Blethen, et al. All of the founders left nearby competitor, Teradyne. Although never verified, corporate lore holds that the name LTX was an abbreviation for the clarion call of its founders: "Leave Teradyne by Christmas (Xmas)" or possibly "Left Teradyne at Christmas." Others believe that LTX stands for "Linear Test eXcellence", "Linear Test eXperts", or is simply an abbreviation of the word "Electronics". Customers often thought it stood for "Later Than eXpected"