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ULN2004ADRG4 Equivalent & Substitute Parts
Part Overview
The ULN2004ADRG4 is a power relay driver IC manufactured by Texas Instruments, designed as a 7-channel NPN transistor array with 1:1 input-to-output ratio in a 16-SOIC surface mount package. This component functions as a low-side switch driver for relay and solenoid applications, rated for 50V maximum load voltage and 500mA maximum output current per channel.
The ULN2004ADRG4 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements. Substitute parts maintain electrical and mechanical compatibility while offering active product status and improved availability.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Number of Outputs | 7 |
| Ratio - Input:Output | 1:1 |
| Output Type | NPN |
| Output Configuration | Low Side |
| Voltage - Load (Max) | 50V |
| Current - Output (Max) | 500mA |
| Input Type | Inverting |
| Interface | Parallel |
| Mounting Type | Surface Mount |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Operating Temperature Range | -40°C ~ 70°C (TA) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the ULN2004ADRG4 are selected based on strict electrical and mechanical compatibility criteria. All substitute parts must maintain the following core parameters:
- 7 output channels with 1:1 input-to-output ratio
- Low-side NPN output configuration
- 50V maximum load voltage rating
- 500mA maximum output current per channel
- Inverting parallel interface
- 16-SOIC surface mount package (0.154", 3.90mm width)
- ROHS3 compliance and MSL 1 rating
Substitutes are grouped into three categories:
MFR Recommended: ULN2004ADR (Texas Instruments) - Direct equivalent with active product status and highest inventory availability.
Direct Substitutes: ULN2002D1013TR (STMicroelectronics), ULN2004AS16-13 (Diodes Incorporated), ULN2004D1013TR (STMicroelectronics) - Functionally equivalent parts from alternative manufacturers maintaining identical electrical specifications and package form factor.
Upgrade Substitutes: ULN2001D1013TR, ULN2003D1013TR, ULQ2003D1013TR, ULQ2004D1013TR (STMicroelectronics), MC1413DR2G (onsemi) - Parts with enhanced performance characteristics or extended operating temperature ranges while maintaining core electrical compatibility.
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Product Status | Number of Outputs | Output Type | Voltage - Load (Max) | Current - Output (Max) | Operating Temperature | Package | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|
| ULN2004ADRG4 | Texas Instruments | Obsolete | 7 | NPN | 50V | 500mA | -40°C ~ 70°C | 16-SOIC | 2,600 |
| ULN2004ADR | Texas Instruments | Active | 7 | NPN | 50V | 500mA | -40°C ~ 70°C | 16-SOIC | 80,213 |
| ULN2002D1013TR | STMicroelectronics | Active | 7 | NPN | 50V | 500mA | -40°C ~ 85°C | 16-SOIC | 72,090 |
| ULN2004AS16-13 | Diodes Incorporated | Active | 7 | NPN | 50V | 500mA | -40°C ~ 105°C | 16-SOIC | 10,300 |
| ULN2004D1013TR | STMicroelectronics | Active | 7 | NPN | 50V | 500mA | -40°C ~ 85°C | 16-SOIC | 54,590 |
| ULN2001D1013TR | STMicroelectronics | Active | 7 | NPN | 50V | 500mA | -40°C ~ 85°C | 16-SOIC | 24,773 |
| ULN2003D1013TR | STMicroelectronics | Active | 7 | Darlington | 50V | 500mA | -40°C ~ 85°C | 16-SOIC | 1,787,200 |
| MC1413DR2G | onsemi | Active | 7 | NPN Darlington | 50V | 500mA | -40°C ~ 150°C (TJ) | 16-SOIC | 30,400 |
| ULQ2003D1013TR | STMicroelectronics | Active | 7 | NPN Darlington | 50V | 500mA | -40°C ~ 150°C (TJ) | 16-SOIC | 50,987 |
| ULQ2004D1013TR | STMicroelectronics | Active | 7 | NPN Darlington | 50V | 500mA | -40°C ~ 150°C (TJ) | 16-SOIC | 5,316 |
Engineering Selection Recommendations
Primary Selection: ULN2004ADR (Texas Instruments) is the manufacturer-recommended equivalent. This part maintains identical electrical specifications and operating temperature range as the ULN2004ADRG4 while offering active product status and significantly higher inventory availability (80,213 units). Both parts are ROHS3 compliant with MSL 1 rating.
Extended Temperature Applications: For applications requiring operation beyond -40°C to 70°C, ULN2004AS16-13 (Diodes Incorporated) extends the upper operating limit to 105°C, and MC1413DR2G or ULQ series parts extend to 150°C junction temperature. These options maintain all core electrical parameters while providing enhanced thermal performance.
High-Volume Availability: ULN2003D1013TR (STMicroelectronics) offers the highest inventory level (1,787,200 units) with Darlington output configuration. This part is suitable for applications where the Darlington topology does not conflict with circuit design requirements.
Multi-Manufacturer Strategy: ULN2002D1013TR, ULN2004D1013TR, and ULN2001D1013TR from STMicroelectronics provide alternative sourcing options with active status and substantial inventory levels, reducing single-source dependency.
All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with standard manufacturing and storage requirements.
Frequently Asked Questions (FAQ)
Q: Can ULN2004ADR be used as a direct replacement for ULN2004ADRG4?
A: Yes. ULN2004ADR is the manufacturer-recommended equivalent with identical electrical specifications, operating temperature range (-40°C to 70°C), and 16-SOIC package. The primary difference is product status: ULN2004ADR is active with higher availability.
Q: What is the difference between NPN and Darlington output types in the substitute list?
A: NPN parts (ULN2004ADR, ULN2002D1013TR, ULN2004D1013TR, ULN2001D1013TR) provide standard transistor switching characteristics. Darlington parts (ULN2003D1013TR, MC1413DR2G, ULQ2003D1013TR, ULQ2004D1013TR) use compound transistor structures with higher current gain. Both types maintain 50V/500mA ratings and are electrically compatible for relay driver applications.
Q: Are all substitute parts in the same package?
A: Yes. All substitute parts use 16-SOIC surface mount package with 0.154" (3.90mm) width, ensuring mechanical compatibility with existing PCB layouts and assembly processes.
Q: Which substitute offers the best thermal performance?
A: MC1413DR2G and ULQ series parts (ULQ2003D1013TR, ULQ2004D1013TR) extend operating temperature to 150°C junction temperature, compared to 70-85°C for standard parts. These are suitable for high-temperature environments.
Q: Can I use ULN2003D1013TR despite its high inventory?
A: Yes. ULN2003D1013TR is functionally compatible with identical electrical ratings. The Darlington output configuration does not prevent substitution in relay driver circuits. High inventory indicates strong market availability and supply chain stability.
Q: Are all parts RoHS compliant?
A: Yes. All parts listed are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), meeting standard environmental and reliability requirements.
Q: What is the recommended substitute for new designs?
A: ULN2004ADR is recommended for new designs as the active manufacturer equivalent from Texas Instruments. For extended temperature requirements, ULN2004AS16-13 (Diodes Incorporated) or MC1413DR2G (onsemi) provide enhanced thermal performance while maintaining core specifications.
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