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High-Performance Power ICs and Hall-Effect Sensors
Serial-Input, Latched Source Drivers with Slew-Rate Limiting
June 26, 1998 - A new line of latched source drivers, the A6800 series, has been announced by Allegro MicroSystems, Inc. Designed primarily to drive vacuum-fluorescent displays, the A6800 series features slew-rate limiting that keeps electrical noise and harmonic generation to a minimum.
The A6800 series features serial inputs with CMOS shift registers and latches that can be directly interfaced to a microprocessor. These ICs can achieve data rates of 33 MHz with either a 3.3 V or 5 V logic supply. For inter-digit blanking, all output drivers can be disabled and the sink drivers turned on with the BLANKING input.
Also featured in the new A6800 series are npn Darlington outputs with a 40 mA source capability and output structures that include active pull-downs for fast discharge of capacitive loads.
The A6800 series ICs are offered in DIP and PLCC packages. Use of copper lead frames, low logic-power dissipation and low output-saturation voltages allow these devices to drive most vacuum-fluorescent displays over the extended temperature range of -40°C to +125°C for automotive applications. Commercial temperature range drivers are also available. The A6800 series is available in 10, 12, 20, and 32-bit versions.
Allegro MicroSystems, Inc. serves major customers in the automotive, office automation, industrial, consumer, communications, and computer markets with its growing line of mixed-signal (analog/digital) products. Allegro specializes in developing system-level solutions that integrate proprietary combinations of bipolar, CMOS and DMOS structures into a single monolithic integrated circuit. Allegro's web site is located at www.allegromicro.com.