Product category:
Power Supply ICs and Controllers
News Release from: Allegro MicroSystems Europe | Subject: A6821 and A6841
Edited by the Electronicstalk Editorial
Team on 03 October 2005
Sink driver ICs feature flexible
interfacing
The A6821 and A6841 are cost-competitive medium-power serial-input latched sink driver ICs using Allegro's DABiC-5 merged bipolar/CMOS/DMOS process.
The A6821 and A6841 from Allegro MicroSystems Europe are cost-competitive medium-power serial-input latched sink driver ICs using Allegro's DABiC-5 merged bipolar/CMOS/DMOS process The merging of low-power CMOS logic inputs and bipolar output power drivers permits these devices to be used in a wide variety of peripheral power driver applications with an interface flexibility beyond the reach of standard logic buffers and power driver arrays
This article was originally published on Electronicstalk on 30 Aug 2000 at 8.00am (UK)
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The A6821 and A6841 are pin-compatible replacements for Allegro's earlier UCN5821 and UCN5841 drivers, but with performance improvements including new 3.3V logic capability, power-on reset and higher data rates (up to 10MHz) and switching speeds.
Other benefits include lower cost and the availability of a lead-free RoHS-compliant option.
Each device incorporates an 8bit CMOS shift register and CMOS control circuitry, eight CMOS data latches, and eight bipolar 500mA current-sinking Darlington NPN output drivers.
The CMOS inputs are compatible with standard CMOS logic levels.
By using the serial data output, the drivers can be cascaded for interface applications requiring additional drive lines.
Integral transient-suppression diodes are added to the 500mA NPN Darlington outputs on the A6841, making this device suitable for use with relays, solenoids, and other inductive loads.
All package variations of the A6841 offer premium performance, with a minimum output-breakdown voltage rating of 50V (35V sustaining).
The A6841 can be operated with a split supply where the negative supply is up to -20V.
Package options include 16- and 18-pin DIP and 16-, 18- and 20-pin SOIC packages.
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