ULN2803ADWIn StockTexas Instruments
ULN2803ADW is an 8-channel NPN Darlington transistor array rated at 50V and 500mA per channel, featuring open-collector outputs with built-in flyback diodes. Ideal for driving relays, motors, and LEDs from logic signals. From $0.64 in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 18
- Lifecycle
- OBSOLETE
- Datasheet
- ULN2803ADW Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.6400(MOQ 60)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-channel NPN Darlington array with 500mA sink current per channel
- 50V output voltage rating with integrated transient suppression diodes
- Open-collector outputs compatible with TTL, CMOS, and PMOS logic inputs
- 18-pin SOIC package enabling compact PCB layouts
- Single supply operation simplifying drive circuit design
Applications
The ULN2803ADW is widely used in industrial automation for driving relay coils, solenoids, and stepper motor windings directly from microcontroller or PLC outputs. It is also popular in LED matrix displays, lamp drivers, and printer head control circuits where high-current sink capability is required. Consumer electronics and home appliance designs leverage its eight independent channels to control multiple loads simultaneously with minimal external components.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Built-in Protections | TRANSIENT |
| Driver Number of Bits | 8 |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PDSO-G18 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Current Flow Direction | SINK |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP18,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Supply Current-Max | 1.35mA |
| Supply Voltage-Nom | 3.3V |
| Surface Mount | YES |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| ## ULN2803ADW Alternates Showing results | Image |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ULN2803ADW:
Frequently Asked Questions
What is the maximum output current and voltage of the ULN2803ADW?
Each of the eight Darlington channels in the ULN2803ADW can sink up to 500mA of continuous output current at a maximum collector-emitter voltage of 50V, making it suitable for driving relays, solenoids, and motors in industrial and consumer applications.
What logic families are compatible with the ULN2803ADW inputs?
The ULN2803ADW inputs are compatible with TTL, CMOS, PMOS, and NMOS logic families operating at standard 3.3V or 5V supply levels. The integrated base resistors ensure proper biasing without external components, simplifying interfacing with microcontrollers and PLCs.
Does the ULN2803ADW include protection for inductive loads?
Yes, the ULN2803ADW incorporates built-in transient suppression (flyback) diodes connected from each output to a common clamp pin. These diodes protect the device from voltage spikes generated when switching inductive loads such as relay coils, solenoids, and motor windings.
What package does the ULN2803ADW use and what are suitable alternatives?
The ULN2803ADW comes in an 18-pin wide-body SOIC (Small Outline Integrated Circuit) package. Functionally equivalent alternatives include the ULN2803A in DIP-18 through-hole package and the ULN2803AFWG in a TSSOP-18 package for more compact board designs.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 60+ | $3.3497 | $200.98 |
| 78+ | $3.2238 | $251.46 |
| 97+ | $3.0978 | $300.49 |
| 600+ | $0.6400 | $383.99 |
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