ULN2003AIDE4 Equivalent & Substitute Parts

Part Overview

The ULN2003AIDE4 is a 7-channel NPN Darlington power switch/driver IC manufactured by Texas Instruments, designed for relay and solenoid driving applications. This component features a 1:1 input-to-output ratio with low-side output configuration, rated for 50V maximum load voltage and 500mA maximum output current per channel in a 16-SOIC surface mount package.

The ULN2003AIDE4 carries an Obsolete product status. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	ULN2003AIDE4
Product Status	Obsolete
Number of Outputs	7
Output Type	Darlington
Voltage - Load (Max)	50V
Current - Output (Max)	500mA
Ratio - Input:Output	1:1
Output Configuration	Low Side
Package / Case	16-SOIC (0.154", 3.90mm Width)
Operating Temperature	-40°C ~ 105°C (TA)
RoHS Status	ROHS3 Compliant
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the ULN2003AIDE4 are grouped based on the following critical parameters that determine functional equivalence:

Primary Substitution Criteria:

Number of outputs: 7 channels
Output type: Darlington or NPN configuration
Voltage rating: 50V maximum load voltage
Current rating: 500mA maximum output current
Package: 16-SOIC surface mount
Input-to-output ratio: 1:1
Output configuration: Low side
Interface: Parallel

Substitution Categories:

Direct Manufacturer Equivalents (Texas Instruments ULN2003 Series) – Active or Last Time Buy status parts with identical electrical specifications and Darlington output type.
Cross-Manufacturer Darlington Equivalents (STMicroelectronics ULQ Series, onsemi MC1413 Series) – Parts meeting all electrical parameters with Darlington output configuration and equivalent package footprint.
NPN Output Variants (STMicroelectronics ULN2001, Diodes Incorporated ULN2004) – Parts with NPN output type instead of Darlington, maintaining all other critical parameters.

Parameter Comparison

Part Number	Manufacturer	Product Status	Output Type	Voltage - Load (Max)	Current - Output (Max)	Operating Temperature	Package	RoHS Status
ULN2003AIDE4	Texas Instruments	Obsolete	Darlington	50V	500mA	-40°C ~ 105°C	16-SOIC	ROHS3 Compliant
ULN2003AID	Texas Instruments	Last Time Buy	Darlington	50V	500mA	-40°C ~ 105°C	16-SOIC	ROHS3 Compliant
ULN2003AIDR	Texas Instruments	Active	Darlington	50V	500mA	-40°C ~ 105°C	16-SOIC	ROHS3 Compliant
ULQ2003D1013TR	STMicroelectronics	Active	Darlington	50V	500mA	-40°C ~ 150°C	16-SOIC	ROHS3 Compliant
ULQ2003D1013TRY	STMicroelectronics	Active	Darlington	50V	500mA	-40°C ~ 150°C	16-SOIC	ROHS3 Compliant
ULQ2004D1013TR	STMicroelectronics	Active	Darlington	50V	500mA	-40°C ~ 150°C	16-SOIC	ROHS3 Compliant
ULN2004AS16-13	Diodes Incorporated	Active	NPN	50V	500mA	-40°C ~ 105°C	16-SOIC	ROHS3 Compliant
MC1413BDR2G	onsemi	Active	Darlington	50V	500mA	-40°C ~ 150°C	16-SOIC	ROHS3 Compliant
MC1413DR2G	onsemi	Active	Darlington	50V	500mA	-40°C ~ 150°C	16-SOIC	ROHS3 Compliant
ULN2001D1013TR	STMicroelectronics	Active	NPN	50V	500mA	-40°C ~ 85°C	16-SOIC	ROHS3 Compliant
ULN2003ADR2G	onsemi	Active	Darlington	50V	500mA	-40°C ~ 70°C	16-SOIC	ROHS3 Compliant

Engineering Selection Recommendations

Tier 1 – Direct Replacement (Recommended): ULN2003AIDR (Texas Instruments) is the primary substitute. This part maintains identical electrical specifications, Darlington output configuration, and operating temperature range (-40°C ~ 105°C) as the obsolete ULN2003AIDE4. Active product status ensures long-term availability and supply chain stability.

Tier 2 – Functional Equivalents with Extended Temperature Range: ULQ2003D1013TR, ULQ2003D1013TRY, and ULQ2004D1013TR (STMicroelectronics) and MC1413BDR2G, MC1413DR2G (onsemi) meet all electrical parameters with Darlington output type. These parts feature extended maximum operating temperature (150°C junction temperature) compared to the original specification. All carry Active product status and ROHS3 compliance.

Tier 3 – NPN Output Alternatives: ULN2004AS16-13 (Diodes Incorporated) and ULN2001D1013TR (STMicroelectronics) provide functional substitution with NPN output configuration instead of Darlington. These parts maintain 50V/500mA ratings and 16-SOIC packaging. ULN2001D1013TR operates at reduced maximum temperature (-40°C ~ 85°C). Selection of NPN variants requires circuit-level verification of saturation voltage and current gain characteristics.

Tier 4 – Last Time Buy Option: ULN2003AID (Texas Instruments) carries Last Time Buy status, indicating limited future availability. This part is suitable for immediate replacement needs but not recommended for new long-term production commitments.

Frequently Asked Questions (FAQ)

Q: Can ULN2003AIDR directly replace ULN2003AIDE4 without circuit modification? A: Yes. ULN2003AIDR maintains identical electrical specifications, output type (Darlington), voltage/current ratings, operating temperature range, and 16-SOIC package footprint. No circuit modifications are required.

Q: What is the difference between Darlington and NPN output types in these parts? A: Darlington output types (ULN2003AIDR, ULQ2003D1013TR, MC1413DR2G) feature higher current gain and lower saturation voltage. NPN output types (ULN2004AS16-13, ULN2001D1013TR) provide different saturation characteristics. Selection depends on load impedance and switching speed requirements in the application circuit.

Q: Are STMicroelectronics ULQ2003 and ULQ2004 parts interchangeable? A: Both ULQ2003D1013TR and ULQ2004D1013TR meet the ULN2003AIDE4 electrical specifications. The primary difference is base part number designation. Both are functionally equivalent for relay and solenoid driver applications.

Q: Does operating temperature range affect part selection? A: Operating temperature range should match application requirements. ULN2003AIDR (-40°C ~ 105°C) matches the original specification. STMicroelectronics and onsemi Darlington variants support extended temperature to 150°C (junction). ULN2001D1013TR is limited to -40°C ~ 85°C. Verify application thermal environment before selection.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance status, matching the original ULN2003AIDE4 specification.

Q: What packaging options are available? A: All substitute parts are supplied in 16-SOIC surface mount package with identical 0.154" (3.90mm) width. Packaging formats vary (Tube, Cut Tape & Digi-Reel, Tape & Reel) based on manufacturer and part number variant. Verify packaging format availability with supplier for procurement requirements.

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