ULQ2004AD Equivalent & Substitute Parts

Part Overview

The ULQ2004AD is a power management integrated circuit (PMIC) manufactured by Texas Instruments, classified as a power switch/driver with 7 NPN outputs. This device is designed for relay and solenoid driving applications, featuring a 1:1 input-to-output ratio with low-side output configuration. The ULQ2004AD operates at a maximum load voltage of 50V with 500mA output current per channel and supports an operating temperature range of -40°C to 85°C in a 16-SOIC surface mount package.

The ULQ2004AD carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this part. Identifying equivalent and substitute components is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for applications currently utilizing this device.

Substiute Parts

ULQ2004AD

Texas InstrumentsIn Stock: 1411ULQ2004AD Datasheet

Current PartRFQ

ULN2004ADR

Texas InstrumentsIn Stock: 80279ULN2004ADR Datasheet

MFR RecommendedRFQ

MC1413BDR2G

onsemiIn Stock: 150344MC1413BDR2G Datasheet

DirectRFQ

ULN2001D1013TR

STMicroelectronicsIn Stock: 24841ULN2001D1013TR Datasheet

DirectRFQ

ULN2002D1013TR

STMicroelectronicsIn Stock: 72112ULN2002D1013TR Datasheet

DirectRFQ

ULN2003D1013TR

STMicroelectronicsIn Stock: 1787225ULN2003D1013TR Datasheet

DirectRFQ

ULN2004D1013TR

STMicroelectronicsIn Stock: 54649ULN2004D1013TR Datasheet

DirectRFQ

ULQ2003ADR2G

onsemiIn Stock: 32887ULQ2003ADR2G Datasheet

DirectRFQ

ULQ2003D1013TR

STMicroelectronicsIn Stock: 51093ULQ2003D1013TR Datasheet

UpgradeRFQ

ULQ2004D1013TR

STMicroelectronicsIn Stock: 5396ULQ2004D1013TR Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ULQ2004AD is determined by strict alignment with the following critical parameters:

• Number of Outputs: 7 channels (mandatory)
• Output Type: NPN configuration (mandatory)
• Ratio - Input:Output: 1:1 (mandatory)
• Output Configuration: Low Side (mandatory)
• Voltage - Load (Max): 50V (mandatory)
• Current - Output (Max): 500mA (mandatory)
• Package / Case: 16-SOIC form factor (mandatory)
• Mounting Type: Surface Mount (mandatory)
• RoHS Status: ROHS3 Compliant (mandatory)

Substitute parts are categorized into three groups based on product status and availability:

MFR Recommended Substitute: ULN2004ADR (Texas Instruments, Active status) — direct functional equivalent with identical electrical specifications and 16-SOIC packaging.

Direct Manufacturer Substitutes: Parts from onsemi and STMicroelectronics (MC1413BDR2G, ULN2001D1013TR, ULN2002D1013TR, ULN2003D1013TR, ULN2004D1013TR, ULQ2003ADR2G) — all maintain the 7-output, 50V/500mA, 16-SOIC configuration with Active product status and full RoHS3 compliance.

Upgrade Substitutes: ULQ2003D1013TR and ULQ2004D1013TR (STMicroelectronics) — enhanced Darlington output type variants with superior thermal performance (150°C junction temperature rating) while maintaining all core electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: ULN2004ADR (Texas Instruments) is the manufacturer-recommended substitute. This part maintains Active product status, identical electrical specifications, and 16-SOIC packaging. It provides direct compatibility with existing ULQ2004AD designs without circuit modification.

Secondary Recommendations: ULN2001D1013TR, ULN2002D1013TR, and ULN2004D1013TR (STMicroelectronics) are functionally equivalent alternatives with Active status and full RoHS3 compliance. These parts support the same 7-output, 50V/500mA configuration in 16-SOIC packaging.

Darlington Output Variants: ULN2003D1013TR and ULQ2004D1013TR (STMicroelectronics) offer enhanced thermal performance with 150°C junction temperature ratings compared to the standard -40°C to 85°C ambient specification. These upgrades maintain all core electrical parameters while providing superior thermal margin for high-temperature applications.

Cross-Manufacturer Option: MC1413BDR2G (onsemi) provides equivalent functionality with 7 NPN Darlington outputs, 50V/500mA ratings, and 16-SOIC packaging. This part is suitable for applications requiring multi-source qualification.

All substitute parts carry ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity, ensuring compatibility with standard manufacturing and storage practices.

Frequently Asked Questions (FAQ)

Q: Can ULN2004ADR be used as a direct replacement for ULQ2004AD?

A: Yes. ULN2004ADR is the manufacturer-recommended substitute with identical electrical specifications (7 NPN outputs, 1:1 ratio, 50V/500mA, low-side configuration) and 16-SOIC packaging. No circuit modifications are required.

Q: What is the difference between NPN and Darlington output types in these substitutes?

A: NPN output types (ULQ2004AD, ULN2004ADR, ULN2001D1013TR, ULN2002D1013TR, ULN2004D1013TR) provide standard transistor switching characteristics. Darlington output types (MC1413BDR2G, ULN2003D1013TR, ULQ2003ADR2G, ULQ2003D1013TR, ULQ2004D1013TR) use compound transistor structures with higher current gain and lower saturation voltage, suitable for low-input-current applications. Both types maintain the 50V/500mA electrical ratings and are functionally compatible in relay and solenoid driver circuits.

Q: Why does ULN2004ADR have a lower operating temperature range (-40°C to 70°C) compared to ULQ2004AD (-40°C to 85°C)?

A: The operating temperature specification reflects the ambient temperature (TA) rating for that specific part variant. If your application requires the full -40°C to 85°C ambient range, select alternatives such as ULN2001D1013TR, ULN2002D1013TR, ULN2003D1013TR, or ULN2004D1013TR from STMicroelectronics, which maintain this extended range.

Q: Are all substitute parts available in 16-SOIC packaging?

A: Yes. All listed substitute parts are available in 16-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring mechanical and electrical compatibility with existing PCB layouts designed for ULQ2004AD.

Q: What is the significance of the Last Time Buy status for ULQ2004AD?

A: Last Time Buy status indicates that Texas Instruments has discontinued this part and will no longer manufacture it after a specified date. Existing inventory may be available, but long-term supply cannot be guaranteed. Transitioning to an Active-status substitute part ensures continued availability for future production runs and design revisions.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant certification and MSL Level 1 (Unlimited) moisture sensitivity rating, meeting current environmental and regulatory requirements for electronic component manufacturing and assembly.

Q: Can I use MC1413BDR2G from onsemi as a substitute?

A: Yes. MC1413BDR2G provides equivalent functionality with 7 NPN Darlington outputs, 50V/500mA ratings, and 16-SOIC packaging. This part is suitable for applications requiring multi-source qualification or when onsemi components are preferred in your supply chain.