ULN2002A STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
The ULN2002A is a 7-channel Darlington transistor array peripheral driver with open-collector outputs and built-in flyback diodes in a 16-pin DIP package. Each channel sinks current to drive relays, motors, and solenoids. Available from stock with worldwide shipping.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- ULN2002A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2160(MOQ 20)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ULN2002A?
- 7 independent Darlington driver channels with open-collector sink outputs, each capable of driving inductive loads up to 50 V
- Integrated transient suppression (flyback) diodes on every output channel, eliminating the need for external protection diodes on relay and solenoid drivers
- DIP-16 through-hole package allowing direct breadboard insertion for rapid prototyping of motor, relay, and LED driving circuits
What is ULN2002A used for?
The ULN2002A is used to interface low-power microcontroller or logic outputs to high-current inductive loads such as relays, stepper motor windings, solenoids, and LED arrays in industrial and consumer electronics. Its 7-channel architecture allows a single IC to drive an entire relay bank or a full stepper motor phase set from standard 5 V TTL or CMOS logic signals. It is also common in home automation controllers, PLC output modules, and printer head drivers where multiple loads must be independently switched.
What are the specifications of ULN2002A?
| Factory Lead Time | 10Weeks |
| YTEOL | 5.62 |
| Built-in Protections | TRANSIENT |
| Driver Number of Bits | 7 |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Current Flow Direction | SINK |
| Output Peak Current Limit-Nom | 0.5A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Supply Voltage-Max | 13V |
| Surface Mount | NO |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| Turn-off Time | 1 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 | Mainland China |
Where can I find the ULN2002A datasheet?
ULN2002A Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ULN2002A?
Compatible alternatives and drop-in replacements for ULN2002A:
suggested
suggested
suggested
Buffer/Inverter Based Peripheral Driver, 7 Driver, 0.5A, BIPolar, PDIP16
Frequently Asked Questions
How many channels does the ULN2002A provide and what types of loads can each channel drive?
The ULN2002A contains 7 independent Darlington driver channels, each with an open-collector output that can sink current to drive relays, solenoids, stepper motor coils, and LED strings operating at up to 50 V. Each channel handles up to 500 mA continuous sink current, sufficient for most small relays and illumination loads in industrial control panels.
Why does the ULN2002A include built-in flyback diodes and when are external diodes still needed?
Inductive loads like relay coils generate voltage spikes when switched off due to stored magnetic energy. The ULN2002A has integrated transient suppression diodes on every output channel, clamping these spikes and protecting both the driver and the controlling MCU. External diodes are generally not required for loads operating below the 50 V clamp voltage, but may still be added for very high-energy solenoids above 50 V.
How does a designer connect the ULN2002A between a 3.3 V MCU and a 12 V relay coil?
The ULN2002A input pins are driven directly from 3.3 V or 5 V logic outputs; the open-collector outputs then connect to one end of the 12 V relay coil, with the coil's other end tied to the 12 V rail. The COM pin is connected to the 12 V supply for the internal flyback diodes to clamp inductive kickback. No additional components are required for standard 12 V relay coils drawing under 500 mA.
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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 |
|---|---|---|
| 20+ | $0.4900 | $9.80 |
| 100+ | $0.2737 | $27.37 |
| 500+ | $0.2485 | $124.25 |
| 1000+ | $0.2161 | $216.10 |
| 10000+ | $0.2160 | $2160.00 |
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