LED Driver features staggered output delay.

Press Release Summary:

Suited for LED display applications, Model A6279 includes 16-bit CMOS shift register, data latches, and 16 channels constant-current sink drivers. Opened LED connections can be detected and fed back to host microprocessor through serial data out pin. With 3.3 or 5 V logic supply, serial data-input rates are 25 MHz. CMOS serial data output permits cascade connections. Package styles include through-hole DIP, surface-mount SOIC, and exposed pad TSSOP.

Original Press Release:

Allegro Microsystem, Inc. Announces a New 16-Bit Serial-Input Constant-Current Latched LED Driver with Open LED Detection

Staggered Output Delay improves noise immunity

Worcester, MA, January 11, 2006 - Allegro MicroSystems, Inc. announces a new LED driver specifically designed for LED-display applications. Each BiCMOS device includes a 16-bit CMOS shift register, accompanying data latches, and 16 channels constant-current sink drivers. Allegro's A6279 provides the user with an open LED feature that allows the user to quickly identify system problems. The A6279 is the only industry-integrated solution with a staggered output delay to improve noise immunity performance.

The CMOS shift register and latches allow direct interfacing with microprocessor-based systems. With a 3.3V or 5V logic supply, typical serial data-input rates are up to 25 MHz. The LED drive current is determined by the user's selection of a single resistor.
A CMOS serial data output permits cascade connections in applications requiring additional drivelines. Opened LED connections can be detected and fed back to the host microprocessor through the serial data out pin. Three package styles are provided, including through-hole DIP (suffix A), surface-mount SOIC (suffix LW) and exposed pad TSSOP (suffix LP) applications. Compliant with RoHS.

The A6279 is priced at $0.95 in quantities of 10,000 and has an 8-week lead-time to market.

About Allegro
Allegro MicroSystems, Inc. is a supplier of advanced mixed-signal power semiconductors and Hall-effect sensors targeted toward the automotive, communications, computer/office automation, consumer and industrial markets. Allegro maintains a leadership position in the integrated magnetic sensor and integrated motor driver product segments. With more than 2,000 employees, Allegro is headquartered in Worcester, MA. Further information about Allegro, including free samples of our products, can be found at www.allegromicro.com.

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