A6277

A6277 8-Bit Serial Input Constant-Current Latched LED Driver Features and Benefits ▪ Up to 150 mA constant-current outputs ▪ Undervoltage lockout ▪ Low-power CMOS logic and latches ▪ High data input rate ▪ Similar to Toshiba® TD62715FN ▪ High/low output current function ▪ Digital dimming control Package: 20-pin SOICW (suffix LW) Description The A6277 is specifically designed for LED display applications. Each BiCMOS device includes an 8-bit CMOS shift register, accompanying data latches, and eight NPN constant-current sink drivers. 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 cascade connections in applications requiring additional drive lines. For inter-digit blanking, all output drivers can be disabled with an ENABLE input high. In addition, a HIGH/LOW function enables full selected current with the application of a logic low, or 50% selected current with the application of a logic high. The surface-mount wide SOIC (LW) is lead (Pb) free, with 100% matte-tin leadframe plating. Not to scale Functional Block Diagram 26185.202G A6277 8-Bit Serial Input Constant-Current Latched LED Driver Selection Guide Part Number A6277ELWTR-T Packing 20-pin SOICW Package 1000 per reel Absolute Maximum Ratings* Characteristic Symbol Notes Rat...