A6276

The A6276 is specifically designed for LED-display applications. Each BiCMOS device includes a 16-bit CMOS shift register, accompanying data latches, and 16 NPN constant-current sink drivers. Except for package style and allowable package power dissipation, the device options are identical.

The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With a 5 V logic supply, typical serial data-input rates are up to 20 MHz. The LED drive current is determined by the user selection of a single resistor. A CMOS serial data output permits cascaded connections in applications requiring additional drive lines. For inter-digit blanking, all output drivers can be disabled with an ENABLE input high. Similar 8-bit devices are available as the A6275.

Three package styles are provided: through-hole DIP (suffix A), surface-mount SOIC (suffix LW), and TSSOP with exposed thermal pad (suffix LP). In normal applications, the copper leadframe and low logic-power dissipation of the DIP allow it to sink maximum rated current through all outputs continuously over the operating temperature range (90 mA, 0.75 V drop, 85°C). All packages are lead (Pb) free, with 100% matte tin leadframe plating.