ALLEGRO MICROSYSTEMS 6277 8-BIT SERIAL-INPUT CONSTANTCURRENT LATCHED LED DRIVER
The A6277x 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. Two package styles and two operating temperature ranges are available. 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 deter- mined by the user’s 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 first character of the part number suffix determines the device operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and suffix ‘S–’ is -20°C to +85°C. Two package styles are provided for through-hole DIP (suffix ‘–A’) or surface-mount SOIC (suffix ‘–LW’) applications. The copper lead frame and low logic-power dissipation allow the dual in-line package to sink 122 mA through all outputs continuously over the operating temperature range (1.0 V drop, +85°C). Note that the A6277EA (DIP) and the A6277ELW (SOIC) are electrically identical.
Brand: ALLEGRO
File format: PDF
Size: 635 KB
MD5 Checksum: 3447F16BE6C236F965F6C6E5B6D6260B
Publication date: 04 May, 2012
Downloads: -
PDF Link: ALLEGRO MICROSYSTEMS 6277 8-BIT SERIAL-INPUT CONSTANTCURRENT LATCHED LED DRIVER PDF