Clock Drivers Operate In CCD Cameras

The EL7457C quad driver for charge-coupled device (CCD) applications can drive storage and vertical clocks with built-in level shifting functionality. This device is designed to drive high capacitance loads with very fast switching times. The 4 ohm on-resistance of each output FET enables the EL7457C to switch a ±5V signal in 14 ns when driving a 1000 pF load. Propagation delays are matched to within 1 ns, with typical values in the 20 ns range. With level shifting capability, the device can operate on a single supply from 10V to 16.5V or on differential supplies from ±5V to ±8V while being controlled from a single 3V or 5V logic signal. A delay pin is provided to offset the propagation delays, if required, and the enable pin can shut down the device.