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The CAT4016 LED driver devices address large LED video displays and have a 16-channel, constant-current sink operation. They are designed for billboard, marquee, instrument and other larger, general-purpose LED displays in both indoor and outdoor applications. The devices can operate with an output voltage as low as 0.4V (for up to 100mA LED current), to enable more power-efficient designs. The maximum LED current is set by an external resistor. A high-speed, four-wire serial interface with up to 25MHz clock frequency controls each individual channel using a shift register and latch configuration. A serial-output data pin allows multiple devices to be cascaded and programmed via one serial interface. They also feature a thermal-shutdown-protection function to disable the LED outputs if the die temperature exceeds a set limit. These products are available in a wide range of package options, including 24-lead SOIC, TSSOP, QSOP and TQFN (4x4mm).