ULQ2004ADG4 Equivalent & Substitute Parts

Part Overview

The ULQ2004ADG4 is a power switch/driver IC manufactured by Texas Instruments, designed for relay and solenoid driving applications. This 16-SOIC surface mount device features a 1:1 input-to-output ratio with 7 NPN outputs, each capable of handling 500mA at up to 50V load voltage. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and ensure long-term component availability.

Key Parameters

Parameter	Value
Manufacturer Part Number	ULQ2004ADG4
Manufacturer	Texas Instruments
Category	Power Management (PMIC)
Number of Outputs	7
Output Type	NPN
Ratio - Input:Output	1:1
Output Configuration	Low Side
Voltage - Load (Max)	50V
Current - Output (Max)	500mA
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the ULQ2004ADG4 is determined by strict alignment with the following electrical and mechanical parameters:

Number of outputs: 7 channels
Output type: NPN configuration
Input-to-output ratio: 1:1
Maximum load voltage: 50V
Maximum output current: 500mA per channel
Package: 16-SOIC form factor
Operating temperature range: -40°C to 85°C
Interface: Parallel
Output configuration: Low side switching

Substitute parts are grouped into three categories based on product status and availability: manufacturer-recommended alternatives (active status), direct functional equivalents (active status), and upgrade options (enhanced specifications or alternative manufacturers).

Parameter Comparison

Part Number	Manufacturer	Output Type	Number of Outputs	Current - Output (Max)	Voltage - Load (Max)	Package	Operating Temperature	Product Status
ULQ2004ADG4	Texas Instruments	NPN	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Discontinued
ULQ2004AD	Texas Instruments	NPN	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Last Time Buy
MC1413BDR2G	onsemi	7 NPN Darlington	7	500mA	50V	16-SOIC	-40°C ~ 150°C	Active
ULN2001D1013TR	STMicroelectronics	NPN	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Active
ULN2002D1013TR	STMicroelectronics	NPN	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Active
ULN2003D1013TR	STMicroelectronics	Darlington	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Active
ULN2004D1013TR	STMicroelectronics	NPN	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Active
ULQ2003ADR2G	onsemi	Darlington	7	500mA	50V	16-SOIC	-40°C ~ 85°C	Active
ULQ2003D1013TR	STMicroelectronics	7 NPN Darlington	7	500mA	50V	16-SOIC	-40°C ~ 150°C	Active
ULQ2004D1013TR	STMicroelectronics	7 NPN Darlington	7	500mA	50V	16-SOIC	-40°C ~ 150°C	Active

Engineering Selection Recommendations

Manufacturer-Recommended Alternative: ULQ2004AD (Texas Instruments) is the direct manufacturer recommendation, maintaining identical electrical specifications and package form factor. This part carries Last Time Buy status, indicating limited availability but confirmed compatibility with existing designs.

Primary Active Substitutes: ULN2001D1013TR, ULN2002D1013TR, and ULN2004D1013TR (STMicroelectronics) are functionally equivalent NPN driver ICs with active product status and high inventory levels. These parts maintain all critical electrical parameters and 16-SOIC packaging, ensuring direct PCB compatibility.

Darlington Configuration Alternatives: ULN2003D1013TR (STMicroelectronics), ULQ2003ADR2G (onsemi), and MC1413BDR2G (onsemi) employ Darlington output stages instead of standard NPN. These parts meet all electrical and mechanical requirements while offering extended operating temperature ranges (up to 150°C junction temperature). Darlington configurations exhibit higher saturation voltage but provide superior current gain characteristics.

Compliance Status: All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status, ensuring regulatory alignment with the original component.

Frequently Asked Questions (FAQ)

Q: Can ULN2003D1013TR replace ULQ2004ADG4 directly? A: Yes. Both parts share identical electrical specifications (7 outputs, 500mA, 50V maximum), 16-SOIC packaging, and operating temperature range. The Darlington output configuration in ULN2003D1013TR provides equivalent functionality with higher current gain.

Q: What is the difference between NPN and Darlington output types in these drivers? A: NPN outputs (ULQ2004ADG4, ULN2001D1013TR, ULN2004D1013TR) provide direct transistor switching. Darlington outputs (ULN2003D1013TR, ULQ2003ADR2G, MC1413BDR2G) use cascaded transistor pairs, resulting in higher current gain but increased saturation voltage. Both configurations handle identical load currents and voltages.

Q: Are there packaging differences between substitutes? A: All listed substitutes use 16-SOIC surface mount packaging with 0.154" width and 3.90mm pitch, ensuring PCB footprint compatibility. Supplier device packages may vary (16-SOIC vs. 16-SO), but physical dimensions remain equivalent.

Q: Which substitute has the highest inventory availability? A: ULN2003D1013TR (STMicroelectronics) maintains the largest inventory at 1,787,200 units, followed by ULN2002D1013TR at 72,090 units. Both ensure long-term supply continuity.

Q: Do all substitutes meet the same compliance requirements? A: Yes. All substitute parts are ROHS3 compliant, MSL Level 1, and REACH unaffected, matching the original ULQ2004ADG4 regulatory status.

Q: Can I use MC1413BDR2G as a substitute despite the different manufacturer? A: Yes. MC1413BDR2G (onsemi) meets all electrical and mechanical requirements with identical output current, load voltage, and package specifications. The extended operating temperature range (up to 150°C) provides additional thermal margin.

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