ULN2803ADWRIn StockTexas Instruments
ULN2803ADWR is an 8-channel Darlington transistor array driver in SOIC-18 package, featuring open-collector outputs with 500mA sink current capacity and built-in flyback diode protection for inductive loads. From $2.50, in stock worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 18
- Lifecycle
- OBSOLETE
- Datasheet
- ULN2803ADWR Datasheet PDF
- Category
- Transistor
- Price
- From $2.5000(MOQ 1)
- 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 Darlington transistor array with 500mA open-collector sink current output per channel
- Built-in transient suppression diodes for protection against inductive load flyback voltage spikes
- Wide input voltage compatibility suitable for direct interface with TTL and CMOS logic levels
- SOIC-18 compact surface-mount package ideal for space-constrained PCB designs
Applications
The ULN2803ADWR is widely used in relay driver circuits, stepper motor control, solenoid drivers, and LED array driving applications where high-current switching from low-power logic signals is required. Its 8-channel configuration makes it ideal for driving multiple loads simultaneously in industrial automation, home appliance controls, and printer head drivers. The integrated flyback diodes simplify design when driving inductive loads such as motors and solenoids.
Specifications
| 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 |
| Output Current-Max | 0.5A |
| Output Peak Current Limit-Nom | 0.5A |
| 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 |
| ## ULN2803ADWR 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 ULN2803ADWR:
Frequently Asked Questions
What is the maximum output current per channel of the ULN2803ADWR?
Each channel of the ULN2803ADWR can sink up to 500mA (0.5A) of output current. The peak output current limit is also rated at 500mA, making it suitable for driving relays, solenoids, and stepper motors that require moderate current switching.
What types of loads can the ULN2803ADWR drive?
The ULN2803ADWR is designed to drive inductive loads such as relays, stepper motors, solenoids, and DC motors, as well as resistive and LED loads. Its built-in transient suppression (flyback) diodes provide protection against voltage spikes generated by inductive loads, eliminating the need for external protection diodes.
Is the ULN2803ADWR compatible with TTL and CMOS logic inputs?
Yes, the ULN2803ADWR is compatible with both TTL and CMOS logic levels. It functions as a buffer or inverter-based peripheral driver, allowing direct interface from 3.3V or 5V microcontrollers and logic circuits to drive higher-current peripheral devices without additional level-shifting components.
What package does the ULN2803ADWR use and what is its footprint?
The ULN2803ADWR comes in a SOIC-18 (Small Outline IC, 18-pin) surface-mount package, also identified by JESD-30 code R-PDSO-G18. This compact package is suitable for automated PCB assembly and is ideal for high-density board designs compared to through-hole DIP alternatives.
Related Guides
BOM Optimization: How to Reduce Electronic Component Costs Without Sacrificing Quality
Practical strategies for reducing BOM costs by 15-30% through smart component selection, supplier diversification, and procurement optimization.
Apr 9, 2026
Top 10 Microcontrollers in 2025: A Comprehensive Comparison Guide
Detailed comparison of the most popular MCUs in 2025 — STM32, ESP32, RP2040, nRF52, and more. Specs, pricing, ecosystem, and use-case recommendations.
Apr 9, 2026
How to Read an IC Datasheet: A Practical Guide for Engineers
Master the art of reading IC datasheets. Learn what every section means, which specs matter most, and how to extract the information you need for your design.
Apr 9, 2026
Understanding the 2025 Chip Shortage: Which Components Are Affected and What to Do
Analysis of the current semiconductor supply landscape, which components face extended lead times, and strategies for engineers and procurement teams.
Apr 9, 2026
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 |
|---|---|---|
| 1+ | $3.8500 | $3.85 |
| 60+ | $3.3497 | $200.98 |
| 78+ | $3.2238 | $251.46 |
| 97+ | $3.0978 | $300.49 |
| 100+ | $2.8800 | $288.00 |
| 1000+ | $2.5000 | $2500.00 |
In Stock · 24h Response · Worldwide Shipping
Response within 24 hours · Worldwide shipping
“FindMyChip sourced our entire STM32 BOM in 48 hours when our usual distributor had 16-week lead times.”