The Spartan series of low cost Field-programmable gate arrays from Xilinx, Inc. includes the Spartan 3E, Spartan 3, Spartan 3L, Spartan IIE, Spartan II, and Spartan/XL device families with gate counts from forty-thousand to five-million. All the devices use 3.3 volt logic and most have the ability to handle other levels including 1.2V, 1.5V, and 2.5V. Xilinx offers the Spartan series as a low-cost alternative to their more expensive but higher performance Virtex series.