ULN2003A Review

flux

Reviewed ULN2003AIDR against the TI datasheet. The existing Datasheet URL is already set, so I did not overwrite it; the official TI datasheet I found is https://www.ti.com/lit/ds/symlink/uln2003ai.pdf.
Key specs confirmed
  • MPN: ULN2003AIDR
  • Manufacturer: Texas Instruments
  • Function: 7-channel high-voltage/high-current NPN Darlington transistor array
  • Package: SOIC-16, TI package code D / R-PDSO-G16
  • Collector-emitter voltage: 50 V max
  • Single-channel collector current: 500 mA rated
  • Input resistors: 2.7 kΩ series base resistors for TTL / 5 V CMOS drive
  • Clamp diodes: Integrated, common cathode at COM
  • Temperature range for ULN2003AI: -40 °C to 105 °C
  • Thermal, SOIC D: RθJA ≈ 88.6 °C/W
Cross-check result
  • Pinout: Matches the datasheet.
    • Pins 1–7: 1B–7B
    • Pin 8: E
    • Pin 9: COM
    • Pins 10–16: 7C–1C
  • Footprint: Matches the SOIC-16 D package geometry: 16 pads, 1.27 mm pitch, ~3.9 mm × 9.9 mm body, compatible with TI’s D package mechanical data.
  • Description / MPN / manufacturer / pin count: All consistent.
Mismatches / quality issues flagged
  • All symbol terminals have Pin Type = Unspecified.
    • 1B–7B should be inputs.
    • 1C–7C should be open-collector / low-side outputs.
    • E should be documented as common emitter / normally ground.
    • COM should be documented as clamp-diode common cathode, not a normal supply pin.
  • Pin descriptions are missing, so the symbol does not capture important datasheet behavior for COM, E, and the open-collector outputs.
  • The stored datasheet is an uploaded PDF copy rather than the canonical TI URL, though it appears to contain the correct TI datasheet content.
Suggested next step: update the pin types and pin descriptions to make the part safer and clearer for schematic/ERC use.
Fix pins and URL
Update pin metadata
Set official datasheet
Run part review
1B
Pin Number
1
2B
Pin Number
2
3B
Pin Number
3
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ULN2003AIDR

ULN2003AIDR thumbnail
Bipolar (BJT) Transistor Array Surface Mount 16-SOIC
Darlington Transistor Array IC – High-voltage, high-current driver array containing seven NPN Darlington pairs with open-collector outputs. The ULN2003AIDR supports output voltage up to 50 V and collector current up to 500 mA per channel, with input-compatible logic levels and a 16-pin SOIC package.
#DarlingtonArray #TransistorDriver #HighVoltageDriver #HighCurrentDriver #ULN2003A #TexasInstruments

Properties

ULN2003AIDR

Texas Instruments

Transistors

ti.com/lit/ds/symlink/uln2003ai.pdf

Q

parametric-v1

creativecommons.org/licenses/by/4.0/

16-SOIC

Pricing & Availability

DPN

Stock

Qty 1

5

0

$0.00

3

0

$0.00

1

12K

$0.1904

1

16K

$1.37

1

2.5K

$1.279

3

511–2.5K

$0.3733–$1.1018

Controls