A6277 Datasheet | Allegro MicroSystems

Features and Benefits - Up to 150 m A 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 Bi CMOS device includes an 8-bit CMOS shift register, acpanying 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 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 Rating Supply Voltage Output Voltage Range Input Voltage Voltage Output Current Operating Ambient Temperature Maximum Junction Temperature Storage Temperature VDD VO VI IO TA TJ(max) Tstg Range E - 0.5 to 24 - 0.4 to VDD + 0.4 - 40 to 85 - 55 to 150 - Caution: These CMOS devices have input static protection (Class 2) but are still susceptible to damage if exposed to extremely high static electrical charges. Units V V V m A ºC ºC ºC Thermal Characteristics may require derating at maximum conditions, see application information Characteristic...