When selecting programmable logic for a project, engineers often face the choice between FPGA and CPLD. Both technologies have their advantages and optimal application areas.
FPGAs (Field-Programmable Gate Arrays) are based on a matrix of logic blocks (CLBs) connected by programmable routing. CPLDs (Complex Programmable Logic Devices) consist of macrocells with fixed routing between functional blocks.
| Parameter | FPGA | CPLD |
|---|---|---|
| Logic Capacity | High (thousands — millions LC) | Low (tens — thousands MC) |
| Memory | Built-in BRAM, DSP | Limited Flash |
| Power | Higher | Lower |
| Configuration | External (SRAM) | Instant (Flash) |
| Cost | Higher | Lower |
FPGAs are optimal for projects requiring high logic capacity: image processing, DSP, communications protocols, cryptography. Popular series: Xilinx Spartan/Artix, Altera Cyclone, Lattice ECP5.
CPLDs are suitable for simpler tasks: address decoding, bus control, interfaces, state machines. Series: Altera MAX II/V/10, Lattice MachXO2/3.
Need to source FPGA components?
Request Quote