Guides

Reference material for identifying a device from its part number and understanding what a manufacturer's ordering code does — and does not — tell you.

• Are Virtex-5 and Virtex-6 discontinued?Every AMD notice that withdrew Virtex-5 or Virtex-6 parts: which device-packages, the last-order dates, and the stated replacements (mostly none).
• Stratix V -2 vs -3: why swapping speed grades changes the core voltageC1, C2 and I2 parts run at 0.90 V; C3, C4, I3, I4 and the L parts at 0.85 V. What each swap means for the board.
• Cyclone IV E: what the L in C8L meansThe L suffix marks a 1.0 V core device. Which grades and packages offer it, and why C8L is not a drop-in for C8.
• Is Spartan-6 obsolete?What AMD discontinued in the Spartan-6 family (only the LXT -4 commercial grade, in 2011), the -3 parts it named as direct replacements, and what you can still order.
• How to read a Xilinx part numberEvery field of an AMD Xilinx ordering code, the full package-designator table, and the speed-grade boundary rule that makes 1LFGG676 read correctly.
• How to read an Intel (Altera) FPGA part numberFamily signature, variant, hard-IP option, member code, package, temperature and speed — and why F23 means 484 pins on a Cyclone V but F484 on a Cyclone II.
• How to read a Lattice FPGA part numberMachXO2 capacity, power and supply-voltage codes, the split speed-grade ranges, package codes, plus ECP5 and iCE40.
• How to read a Microchip (Microsemi) FPGA part numberPolarFire feature letters, speed grades, flip-chip pitch codes and temperature grades, and the older ProASIC3 flash scheme.