ULN2003A
2003 Thru 2024 High-Voltage, High-Current Darlington Arrays
2003 thru 2024
High-Voltage, High-Current Darlington Arrays
Not for New Design
These Parts Are In Production But Have Been Determined To Be Not For New Design. This Classification
indicates that sale of this device is currently restricted to existing customer
Applications. The device should not be purchased for new design
Applications Because Obsolescence In The Near Future Is Probable. Samples Are No Longer Available.
Date of status change: November 1, 2004
Recommended Substitutions:
Note: For Detailed Information On Purchasing Options, Contact Your Local Allegro Field
Applications engineer or sales representative.
Allegro Microsystems 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 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
Dwg. No. A-9594
Note That The Uln20xxa Series (dual In-line Package) And Uln20xxl Series (small-outline Ic Package)
are electrically identical and share a common terminal number assignment.
ABSOLUTE
MAXIMUM RATINGS
HIGH-VOLTAGE, HIGH-CURRENT DARLINGTON ARRAYS
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 Selected For Operation Directly With 5 V
Ttl Or Cmos. These Devices Will Handle Numerous Interface Needs - Particularly Those Beyond The
capabilities of standard logic buffers.
The Uln2004a/l And Uln2024a/l Have Series Input Resistors For Operation Directly From 6 To 15 V Cmos
or PMOS logic outputs.
The Uln2003a/l And Uln2004a/l Are The Standard Darlington Arrays. The Outputs Are Capable Of Sinking
500 Ma And Will Withstand At Least 50 V In The Off State. Outputs May Be Paralleled For Higher Load
Current Capability. The Uln2023a/l And Uln2024a/l Will Withstand 95 V In The Off State.
These Darlington Arrays Are Furnished In 16-pin Dual In-line Plastic Packages (suffix "a") And
16-lead Surface-mountable Soics (suffix "l"). All Devices Are Pinned With Outputs Opposite Inputs To
Facilitate Ease Of Circuit Board Layout. All Devices Are Rated For Operation Over The Temperature
Range Of -20 C To +85 C. Most (see Matrix, Next Page) Are Also Available For Operation To -40 C;
to order, change the prefix from "ULN" to "ULQ".
Features I Ttl, Dtl, Pmos, Or Cmos-compatible Inputs I Output Current To 500 Ma I Output Voltage To
95 V I Transient-protected Outputs I Dual In-line Plastic Package Or Small-outline Ic Package
X = Digit To Identify Specific Device. Characteristic Shown Applies To Family Of Devices With
remaining digits as shown. See matrix on next page.
PARTIAL SCHEMATICS
ULN20x3A/L (Each Driver)
DEVICE PART NUMBER DESIGNATION
VCE(MAX) IC(MAX)
50 V 500 mA
95 V 500 mA
Part Number