Manufacturer

Intel (formerly Altera)

Interface

USB 2.0 (Type-A or Micro-USB, depending on model)

Target Devices

Altera/Intel FPGAs & CPLDs (e.g., Cyclone, MAX II/V, Stratix)

Supported Protocols

JTAG, AS (Active Serial), PS (Passive Serial)

Voltage Levels

3.3V (default), supports 1.8V/2.5V/5V with level shifting

Compatibility

Works with Quartus II/Prime (Windows/Linux)

Programming Speed

Up to 24 MHz (JTAG clock, depends on FPGA)

Cable Length

Typically 1m (shorter recommended for signal integrity)

Driver Support

libusb (Linux), Windows (official Intel drivers)

Clone Versions

Cheap clones available (may lack official support)

Key Features

- Hot-pluggable

- Plug-and-play in Quartus

- Debugging support (SignalTap II)