ULN2003BPWR Equivalent & Substitute Parts

Part Overview

The ULN2003BPWR is a Power Switch/Driver integrated circuit manufactured by Texas Instruments, designed for relay and solenoid driving applications. This 16-TSSOP surface mount device features seven Darlington output stages with a 1:1 input-to-output ratio and a maximum output current of 500mA per channel. The device operates across a temperature range of -40°C to 105°C and is ROHS3 compliant.

The ULN2003BPWR carries a Last Time Buy product status, indicating that Texas Instruments has discontinued this specific variant. Identifying equivalent and substitute parts is necessary to ensure continued availability for new designs and ongoing production requirements.

Substiute Parts

ULN2003BPWR

Texas InstrumentsIn Stock: 3428ULN2003BPWR Datasheet

Current PartRFQ

ULN2003AIPWR

Texas InstrumentsIn Stock: 35133ULN2003AIPWR Datasheet

MFR RecommendedRFQ

TBD62003AFNG,EL

Toshiba Semiconductor and StorageIn Stock: 24045TBD62003AFNG,EL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ULN2003BPWR are identified based on the following critical parameters that determine functional compatibility:

Primary Matching Criteria:

• Number of Outputs: 7 channels
• Ratio - Input:Output: 1:1
• Output Configuration: Low Side
• Voltage - Load (Max): 50V
• Current - Output (Max): 500mA
• Input Type: Inverting
• Mounting Type: Surface Mount
• Package Width: 4.40mm

Acceptable Variations:

• Output Type: Darlington or N-Channel (both suitable for switching applications)
• Operating Temperature Range: Minimum -40°C to maximum 85°C or higher
• Package Designation: 16-TSSOP or 16-SSOP/16-LSSOP (equivalent pinout and footprint)
• Product Status: Active preferred over Last Time Buy

The substitute parts listed below maintain electrical and mechanical compatibility within these parameters.

Parameter Comparison

Engineering Selection Recommendations

ULN2003AIPWR (Texas Instruments): This part is the primary recommended substitute for the ULN2003BPWR. Both devices are manufactured by Texas Instruments and share identical electrical specifications, including Darlington output stages, 1:1 ratio, 50V maximum load voltage, and 500mA output current. The ULN2003AIPWR maintains the same 16-TSSOP package and operating temperature range (-40°C to 105°C). Critically, the ULN2003AIPWR carries Active product status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant with MSL 1 rating.

TBD62003AFNG,EL (Toshiba Semiconductor and Storage): This part provides an alternative substitute with equivalent electrical performance. The TBD62003AFNG,EL maintains the same 7-output configuration, 1:1 ratio, 50V load voltage, and 500mA output current. The primary difference is the output stage type: N-Channel versus Darlington. Both output types are suitable for low-side switching applications with identical voltage and current ratings. The TBD62003AFNG,EL is packaged in 16-LSSOP (equivalent footprint to 16-TSSOP with 4.40mm width) and carries Active product status. The operating temperature range is -40°C to 85°C, which is narrower than the ULN2003BPWR but remains suitable for most industrial applications. The TBD62003AFNG,EL is ROHS3 compliant with MSL 1 rating.

Selection between ULN2003AIPWR and TBD62003AFNG,EL depends on application-specific requirements: choose ULN2003AIPWR for designs requiring the extended 105°C upper temperature limit or Darlington-specific characteristics; choose TBD62003AFNG,EL for cost optimization or when N-Channel switching performance is acceptable.

Frequently Asked Questions (FAQ)

Q: Can the ULN2003AIPWR directly replace the ULN2003BPWR?

A: Yes. Both parts share identical electrical specifications, package type (16-TSSOP), pinout, and operating characteristics. The ULN2003AIPWR is the direct successor with Active product status.

Q: What is the difference between Darlington and N-Channel output types?

A: Both are switching output stages suitable for low-side driver applications. Darlington stages (ULN2003BPWR, ULN2003AIPWR) provide higher input impedance and lower saturation voltage. N-Channel stages (TBD62003AFNG,EL) provide lower on-resistance. For the specified 500mA output current and 50V load voltage, both are functionally equivalent.

Q: Is the TBD62003AFNG,EL package compatible with the ULN2003BPWR footprint?

A: The TBD62003AFNG,EL uses 16-LSSOP packaging versus 16-TSSOP for the ULN2003BPWR. Both packages have identical 4.40mm width and 16-pin configuration. Pinout compatibility must be verified against the specific application schematic, as package designations may indicate minor pitch or lead form differences.

Q: Why is the ULN2003BPWR marked as Last Time Buy?

A: Last Time Buy status indicates Texas Instruments has discontinued this specific part variant. The ULN2003AIPWR is the active replacement, offering identical functionality with continued manufacturer support.

Q: Are all three parts ROHS3 compliant?

A: Yes. The ULN2003BPWR, ULN2003AIPWR, and TBD62003AFNG,EL are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the maximum operating temperature difference between these parts?

A: The ULN2003BPWR and ULN2003AIPWR operate to 105°C, while the TBD62003AFNG,EL operates to 85°C. For applications requiring operation above 85°C, select a Texas Instruments part.