ULN2075B STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
ULN2075B is a 4-channel Darlington transistor array from STMicroelectronics in a 16-pin DIP package, featuring open-collector outputs with built-in transient suppression diodes. It drives inductive loads such as relays and solenoids from logic-level inputs. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- ULN2075B Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.3870(MOQ 1)
- Temp Range
- -20.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ULN2075B?
- 4-channel open-collector Darlington array capable of driving inductive loads such as relays, solenoids, and stepper motors directly from logic-level signals
- Integrated transient-suppression diodes on every output channel protecting both the driver IC and upstream logic from inductive kickback voltage spikes
- 16-pin PDIP through-hole package compatible with standard DIP sockets for fast prototyping and easy field replacement in industrial control panels
What is ULN2075B used for?
The ULN2075B is used to interface microcontroller or PLC outputs to medium-power inductive loads including relays, solenoids, and DC motors in factory automation equipment. Its 4 independent Darlington channels allow a single IC to control multiple actuators simultaneously, reducing BOM complexity in conveyor controllers, valve drivers, and stepper-motor sequencers. The built-in flyback diodes eliminate the need for external protection components, simplifying PCB layout in relay-driver circuits.
What are the specifications of ULN2075B?
| Reach Compliance Code | Not Compliant |
| YTEOL | 0 |
| Built-in Protections | TRANSIENT |
| Driver Number of Bits | 4 |
| Input Characteristics | STANDARD |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Current Flow Direction | SINK |
| Output Current-Max | 1.5A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Surface Mount | NO |
| Terminal Finish | Tin (Sn) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Turn-off Time | 1.5 µs |
| Turn-on Time | 1 µs |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Malaysia |
Where can I find the ULN2075B datasheet?
ULN2075B Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ULN2075B?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many output channels does ULN2075B provide, and what load types can each channel drive?
The ULN2075B provides 4 independent open-collector Darlington output channels. Each channel handles inductive loads such as 5 V to 50 V relays, solenoids, and small DC motors driven from standard TTL or CMOS logic inputs. The built-in transient-suppression diodes on each output protect against inductive kickback without requiring external flyback diodes.
Which industrial control designs benefit from using ULN2075B as a relay driver?
Programmable logic controllers (PLCs), industrial sequencers, and motor-drive controllers that switch 24 V or 48 V relay coils from 5 V logic rails benefit from the ULN2075B. Its 4-channel Darlington topology allows one IC to control a 4-coil relay bank, reducing wiring density and component count in DIN-rail-mounted control modules and conveyor automation panels.
What package does ULN2075B use, and how does its through-hole form factor support field maintenance?
The ULN2075B comes in a 16-pin PDIP (R-PDIP-T16) through-hole package with 2.54 mm lead pitch, compatible with standard DIP-16 sockets. Socket mounting allows technicians to replace a failed driver array without soldering tools during field maintenance of relay panels, significantly reducing mean-time-to-repair in industrial and building-automation installations.
How does ULN2075B's open-collector output architecture enable wired-OR bus configurations?
Because each ULN2075B output is open-collector, multiple channels or multiple ICs can connect their outputs to a shared bus node. When any channel pulls the node low, the bus reads low, implementing a wired-OR logic function across 4 or more channels without additional gate ICs. A single pull-up resistor on the common bus node completes the circuit, useful in shared-alarm and fault-indication wiring.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $1.3870 | $1.39 |
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