A2003, A2004, A2023, and A2024
High Voltage High Current Darlington Arrays Discontinued Product
These parts are no longer in production The device should not be
purchased for new design applications. Samples are no longer available. Date of status change: October 31, 2005 Recommended Substitutions: NOTE: For detailed information on purchasing options, contact your
local Allegro field applications engineer or sales representative.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a
product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information
included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor
for any infringements of patents or other rights of third parties which may result from its use. Data Sheet
29304F 2003 THRU
2024 HIGH-VOLTAGE, HIGH-CURRENT
DARLINGTON ARRAYS
1 16 2 15 3 14 4 13 5 12 6 11 7 10 8 9 Ideally suited for interfacing between low-level logic circuitry and
multiple peripheral power loads, the Series ULN20xxA/L high-voltage,
high-current Darlington arrays feature continuous load current ratings
to 500 mA for each of the seven drivers. At an appropriate duty cycle
depending on ambient temperature and number of drivers turned ON
simultaneously, typical power loads totaling over 230 W (350 mA x 7,
95 V) can be controlled. Typical loads include relays, solenoids,
stepping motors, magnetic print hammers, multiplexed LED and
incandescent displays, and heaters. All devices feature open-collector
outputs with integral clamp diodes.
The ULN2003A/L and ULN2023A/L have series input resistors …