Texas Instruments ULN2004AI datasheet
Summary
The ULN2004AI is a high-voltage, high-current Darlington transistor array designed specifically for switching demanding inductive loads. Featuring seven npn pairs and built-in clamp diodes, it provides robust output capability compatible with common TTL or 5V CMOS logic. This manual serves as a comprehensive technical datasheet, covering absolute maximum ratings, operational characteristics, various package options (PDIP, SOIC), application schematics, and essential ordering information. It is the ideal component for electronics designers creating reliable systems such as relay drivers, display controllers, line interfaces, and general logic buffer solutions.
Page 1 Text Content
SLRS055 − APRIL 2004
500-m A-Rated Collector Current D, N, OR NS PACKAGE (TOP VIEW)
(Single Output) High-Voltage Outputs 50 V
Output Clamp Diodes 2B 2C
Inputs Compatible With Various Types of 3B 3C Logic 4B 4C 5B 5C
Relay-Driver Applications
6B 6C description/ordering information 7B 7C COM
The ULN2004AI is a high-voltage, high-current Darlington transistor array. This device consists of seven npn Darlington pairs that feature high-voltage outputs with common-cathode clamp diodes for switching inductive loads. The collector-current rating of a single Darlington pair is 500 m A. The Darlington pairs can be paralleled for higher-current capability. Applications include relay drivers, hammer drivers, lamp drivers, display drivers (LED and gas discharge), line drivers, and logic buffers. The ULN2004AI has a 10.5-kΩ series base resistor for each Darlington pair for operation directly with TTL or 5-V CMOS devices.
ORDERING INFORMATION
ORDERABLE TOP-SIDE
TA PACKAGE†
PART NUMBER MARKING
PDIP (N) Tube of 25 ULN2004AIN ULN2004AIN
Tube of 40 ULN2004AID
−40°C to 105°C SOIC (D) ULN2004AI
Reel of 2500 ULN2004AIDR
SOP (NS) Reel of 2000 ULN2004AINSR ULN2004AI
Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
!" #!$% & "' Copyright 2004, Texas Instruments Incorporated
1POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
Page Summary Contents For Texas Instruments ULN2004AI datasheet
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 13 |
| File Size | 421.93 KB |
| Published | May 29, 2026 |
Enter the captcha to get the download link:
Frequently Asked Questions
What types of loads can the ULN2004AI drive?
This device is designed for switching inductive loads in applications such as relay drivers, hammer drivers, lamp drivers, and display drivers.
Is this component compatible with TTL or 5-V CMOS circuits?
Yes, it includes a 10.5-kΩ series base resistor for operation directly with both TTL and 5-V CMOS devices.
What is the maximum current rating of one Darlington pair?
The collector-current rating for a single Darlington pair is specified as 500 mA.
How do I determine the maximum permissible power dissipation (P)?
Power dissipation P should be calculated using the formula: P = (T(max) − T)/θ, where θ is the package thermal impedance.