component
ULN2074B
Public Made by Adomby adom
STMicroelectronics Darlington Transistor Arrays, DIP-16. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownULN2074B
STMicroelectronics · Darlington Transistor Arrays · DIP-16
ULN2074B from STMicroelectronics, in a DIP-16. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | C | passive | Collector (open output) of Darlington driver, rated 50 V minimum breakdown and up to 1.5 A. |
| 2 | E | passive | Emitter of Darlington driver, isolated from the other emitters on the ULN2074B. |
| 3 | B | input | Base (input) of Darlington driver, compatible with 5 V logic families, absolute maximum input voltage 30 V. |
| 4 | SUB | passive | Substrate pin, the reference for input voltage on the ULN2074B, to be connected to the most negative potential and used as heat-sink pin. |
| 5 | SUB | passive | Substrate pin, the reference for input voltage on the ULN2074B, to be connected to the most negative potential and used as heat-sink pin. |
| 6 | B | input | Base (input) of Darlington driver, compatible with 5 V logic families, absolute maximum input voltage 30 V. |
| 7 | E | passive | Emitter of Darlington driver, isolated from the other emitters on the ULN2074B. |
| 8 | C | passive | Collector (open output) of Darlington driver, rated 50 V minimum breakdown and up to 1.5 A. |
| 9 | C | passive | Collector (open output) of Darlington driver, rated 50 V minimum breakdown and up to 1.5 A. |
| 10 | E | passive | Emitter of Darlington driver, isolated from the other emitters on the ULN2074B. |
| 11 | B | input | Base (input) of Darlington driver, compatible with 5 V logic families, absolute maximum input voltage 30 V. |
| 12 | SUB | passive | Substrate pin, the reference for input voltage on the ULN2074B, to be connected to the most negative potential and used as heat-sink pin. |
| 13 | SUB | passive | Substrate pin, the reference for input voltage on the ULN2074B, to be connected to the most negative potential and used as heat-sink pin. |
| 14 | B | input | Base (input) of Darlington driver, compatible with 5 V logic families, absolute maximum input voltage 30 V. |
| 15 | E | passive | Emitter of Darlington driver, isolated from the other emitters on the ULN2074B. |
| 16 | C | passive | Collector (open output) of Darlington driver, rated 50 V minimum breakdown and up to 1.5 A. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | STMicroelectronics |
| Package | DIP-16 |
| Category | Transistors/Thyristors |
| Pins | 16 |
CAD (KiCad official)
- Symbol:
ULN2074B - Footprint:
Package_DIP:DIP-16_W7.62mm - 3D model: DIP-16 (KiCad packages3D, STEP)
- 3D model files:
uln2074b-etched.step/uln2074b-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);uln2074b.step/uln2074b.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: STMicroelectronics datasheet (14 pp, sha256
23625f675e9a4592, retrieved 2026-10-11, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).