Product category: Power Supply ICs and Controllers
News Release from: Allegro MicroSystems Europe | Subject: A6818
Edited by the Electronicstalk Editorial Team on 14 October 2002
Serial input latched source driver IC
The A6818 driver IC combines a 32bit CMOS shift register, accompanying data latches and control circuitry with bipolar sourcing outputs and PNP active pull-down devices
The new A6818 driver integrated circuit from Allegro MicroSystems uses the company's DABiC-IV (digital/analogue/bipolar fourth-generation) integrated-circuit process to combine a 32bit CMOS shift register, accompanying data latches and control circuitry with bipolar sourcing outputs and PNP active pull-down devices.
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Designed primarily to drive vacuum-fluorescent displays, the device features 60V and -40mA output ratings that allow it to be used in many other peripheral power driver applications.
The high data input rate (up to 33MHz with a 3.3 or 5V logic supply) is combined with a controlled output slew rate which reduces electromagnetic noise effects.
The CMOS shift register and latches allow direct interfacing with microprocessor-based systems, while a CMOS serial data output permits cascade connections in applications requiring additional drive lines.
Further reading
Hall switch has a finger on the pulse
General-purpose Hall-effect bipolar switch is optimised for applications where pulsing the supply line is used to conserve power
The output source drivers are NPN Darlingtons capable of sourcing up to 40mA.
For inter-digit blanking, all output drivers can be disabled and all sink drivers turned on with the blanking input high.
The PNP active pull-down circuits will sink at least 2.5mA.
Three temperature ranges are available for optimum performance in commercial, industrial or automotive (suffix K-) applications.
Package styles are provided for through-hole DIP or minimum-area surface-mount PLCC applications.
Copper lead frames, low logic-power dissipation, and low output-saturation voltages allow these devices to drive most multiplexed vacuum-fluorescent displays over the maximum operating temperature range.
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