Product category: Power Supply ICs and Controllers
News Release from: Allegro MicroSystems Europe | Subject: A6259KA and A6259LKW
Edited by the Electronicstalk Editorial Team on 10 March 2003
DMOS power drivers take 8bit addresses
The A6259KA and A6259LKW are multifunction power driver ICs, each combining a three- to eight-line CMOS decoder circuit with accompanying data latches, control circuitry and DMOS outputs
The new A6259KA and A6259LKW integrated circuits from Allegro MicroSystems each combine a three- to eight-line CMOS decoder circuit and accompanying data latches, control circuitry and DMOS outputs in a multifunctional power driver. The new devices are capable of storing single-line data in the addressable latches, or can be used as decoders or demultiplexers.
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Driver applications include relays, solenoids, and other medium-current or high-voltage peripheral power loads.
The CMOS inputs and latches allow direct interfacing with microprocessor-based systems.
When used with TTL circuitry, they typically require appropriate pull-up resistors to ensure an input logic 'high'.
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Four modes of operation are selectable with the 'clear' and 'enable' inputs.
The devices feature a 50V minimum output clamp voltage, a 250mA output current with all outputs on simultaneously, and a typical 'on' resistance of 1.3ohm.
The addressed DMOS output inverts the data input with all unaddressed outputs remaining in their previous states.
All the output drivers are disabled (with the DMOS sink drivers turned off) when the 'clear' input is low and the 'enable' input high.
The DMOS open-drain outputs are capable of sinking up to 750mA.
The A6259KA is housed in a 20-pin dual inline plastic package.
The A6259KLW is supplied in a 20-lead wide-body, small-outline plastic package (SOIC) with gullwing leads for surface-mount applications.
Copper lead frames, reduced supply current requirements, and low on-state resistance allow both devices to sink 150mA from all outputs continuously, to ambient temperatures over 85C.
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