ULN2003ADRG3 Equivalent & Substitute Parts

Part Overview

The ULN2003ADRG3 is a 7-channel NPN Darlington power switch/driver manufactured by Texas Instruments, designed for relay and solenoid driving applications. This part operates at a maximum load voltage of 50V with 500mA output current per channel and features a 1:1 input-to-output ratio with low-side output configuration. The ULN2003ADRG3 is currently in Last Time Buy status, indicating production discontinuation. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain supply chain reliability for new production runs and long-term support.

Key Parameters

Parameter	Value
Manufacturer Part Number	ULN2003ADRG3
Manufacturer	Texas Instruments
Base Product Number	ULN2003
Number of Outputs	7
Output Type	Darlington
Voltage - Load (Max)	50V
Current - Output (Max)	500mA
Ratio - Input:Output	1:1
Output Configuration	Low Side
Input Type	Inverting
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Operating Temperature	-40°C ~ 70°C (TA)
RoHS Status	ROHS3 Compliant
Product Status	Last Time Buy

Substitute Part Grouping Explanation

Substitution eligibility for the ULN2003ADRG3 is determined by the following critical parameters:

Number of Outputs: Must be 7 channels
Output Type: Darlington or NPN configuration
Voltage - Load (Max): Minimum 50V rating
Current - Output (Max): Minimum 500mA per channel
Ratio - Input:Output: 1:1 configuration
Output Configuration: Low Side
Input Type: Inverting
Package / Case: 16-SOIC form factor (0.154", 3.90mm Width)
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Substitute parts are grouped into two categories: direct equivalents (same base product number ULN2003 with different packaging or manufacturer) and functional upgrades (ULN2004 series and ULQ variants that meet or exceed all electrical specifications while maintaining pin compatibility and package form factor).

Parameter Comparison

Parameter	ULN2003ADRG3 (Main)	ULN2003ADR	ULN2003D1013TR	ULN2004AS16-13	ULN2004D1013TR	ULQ2003ADR2G	ULQ2003D1013TR	ULQ2003D1013TRY	ULQ2004D1013TR
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	Diodes Incorporated	STMicroelectronics	onsemi	STMicroelectronics	STMicroelectronics	STMicroelectronics
Number of Outputs	7	7	7	7	7	7	7	7	7
Output Type	Darlington	Darlington	Darlington	NPN	NPN	Darlington	Darlington	Darlington	Darlington
Voltage - Load (Max)	50V	50V	50V	50V	50V	50V	50V	50V	50V
Current - Output (Max)	500mA	500mA	500mA	500mA	500mA	500mA	500mA	500mA	500mA
Ratio - Input:Output	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1
Output Configuration	Low Side	Low Side	Low Side	Low Side	Low Side	Low Side	Low Side	Low Side	Low Side
Input Type	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting	Inverting
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature (TA)	-40°C ~ 70°C	-40°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 85°C	150°C (TJ)	150°C (TJ)	150°C (TJ)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Last Time Buy	Active	Active	Active	Active	Active	Active	Active	Active
Packaging	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®	Cut Tape (CT) & Digi-Reel®
Inventory Status	25,503 Pcs	1,005,200 Pcs	1,787,200 Pcs	10,300 Pcs	54,590 Pcs	32,800 Pcs	50,987 Pcs	106,770 Pcs	5,316 Pcs

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

ULN2003ADR (Texas Instruments) is the primary recommended substitute. This part maintains identical electrical specifications, Darlington output type, and 16-SOIC package form factor as the ULN2003ADRG3. The only difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect functional compatibility. Product status is Active with significantly higher inventory availability (1,005,200 units), ensuring long-term supply continuity.

Secondary Equivalent (Same Base Product, Alternative Manufacturer):

ULN2003D1013TR (STMicroelectronics) provides functional equivalence with extended operating temperature range (-40°C to 85°C versus -40°C to 70°C). This part is suitable for applications requiring higher temperature tolerance. Inventory availability is excellent (1,787,200 units), and product status is Active.

Functional Upgrade Options:

ULQ2003ADR2G (onsemi) and ULQ2003D1013TR (STMicroelectronics) are functionally compatible upgrades maintaining Darlington output type with extended operating temperature ranges. These parts are categorized as Transistors, Bipolar (BJT) and support identical electrical load specifications.

ULN2004 series parts (ULN2004AS16-13 and ULN2004D1013TR) feature NPN output type instead of Darlington configuration. These parts meet all voltage and current specifications and support extended operating temperature ranges (-40°C to 105°C and -40°C to 85°C respectively). Selection of NPN variants requires circuit-level verification to confirm compatibility with existing input drive requirements.

ULQ2003D1013TRY (STMicroelectronics) includes automotive qualification (AEC-Q100) and is suitable for automotive applications requiring enhanced reliability certification.

All substitute parts maintain ROHS3 compliance and are suitable for direct PCB layout substitution without modification.

Frequently Asked Questions (FAQ)

Q: Can I use ULN2004 series parts as substitutes for ULN2003ADRG3?

A: ULN2004 series parts (ULN2004AS16-13 and ULN2004D1013TR) meet all electrical specifications and package requirements. The primary difference is output type: ULN2004 uses NPN configuration while ULN2003 uses Darlington. Both configurations support 50V load voltage and 500mA output current. Circuit compatibility depends on input drive voltage and impedance requirements specific to your application.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® packaging provides smaller quantities on tape segments. Both formats contain identical components and are functionally equivalent. Selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts pin-compatible with ULN2003ADRG3?

A: All listed substitute parts maintain 16-SOIC package form factor with identical pin assignments. Direct PCB substitution is supported without layout modification.

Q: Which substitute offers the best long-term availability?

A: ULN2003ADR (Texas Instruments) and ULN2003D1013TR (STMicroelectronics) offer the highest inventory levels (1,005,200 and 1,787,200 units respectively) with Active product status, ensuring sustained supply chain support.

Q: Can I use ULQ2003D1013TRY in non-automotive applications?

A: ULQ2003D1013TRY includes AEC-Q100 automotive qualification and MSL-3 moisture sensitivity rating. This part is functionally suitable for non-automotive applications; however, the automotive qualification and enhanced reliability specifications represent design margin beyond standard requirements.

Q: What operating temperature range should I select?

A: The ULN2003ADRG3 operates at -40°C to 70°C. Substitute parts offer extended ranges: ULN2003D1013TR and ULQ2003ADR2G support -40°C to 85°C, while ULN2004AS16-13 supports -40°C to 105°C. Select based on your application's thermal environment requirements.

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