Overview
The ULN2004AIDR, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device consists of seven NPN Darlington pairs, each rated at 500 mA, with a peak current capability of 600 mA. It is designed to interface with various logic families, specifically CMOS and PMOS devices operating within the 6V to 15V range. The ULN2004AIDR includes integrated suppression diodes for driving inductive loads, such as solenoids, relays, and DC motors, and its input pins are placed opposite the output pins to simplify board layout.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Darlington Pairs | 7 |
| Output Current per Driver | 500 mA (600 mA peak) |
| Output Voltage | 50 V |
| Input Compatibility | CMOS, PMOS (6V to 15V) |
| Series Base Resistor | 10.5 kΩ |
| Operating Temperature Range | -20°C to 70°C |
| Package Types | SOIC (D), PDIP 16 |
Key Features
- Seven Darlington pairs per package
- Output current 500 mA per driver (600 mA peak)
- Output voltage 50 V
- Integrated suppression diodes for inductive loads
- Outputs can be paralleled for higher current
- TTL/CMOS/PMOS compatible inputs
- Input pins placed opposite to output pins to simplify layout
- High-voltage outputs with common-cathode clamp diodes
Applications
The ULN2004AIDR is versatile and can drive a wide range of loads, including:
- Solenoids
- Relays
- DC motors
- LED displays
- Filament lamps
- Thermal print-heads
- High-power buffers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers and logic buffers
Q & A
- What is the output current rating of the ULN2004AIDR?
The output current rating is 500 mA per driver, with a peak current of 600 mA.
- What is the output voltage capability of the ULN2004AIDR?
The output voltage capability is 50 V.
- Which logic families is the ULN2004AIDR compatible with?
The ULN2004AIDR is compatible with CMOS and PMOS devices operating within the 6V to 15V range.
- What type of loads can the ULN2004AIDR drive?
The ULN2004AIDR can drive solenoids, relays, DC motors, LED displays, filament lamps, thermal print-heads, and high-power buffers.
- What is the purpose of the integrated suppression diodes?
The integrated suppression diodes are for driving inductive loads.
- Can the outputs of the ULN2004AIDR be paralleled?
Yes, the outputs can be paralleled for higher current capability.
- What is the operating temperature range of the ULN2004AIDR?
The operating temperature range is -20°C to 70°C.
- What package types are available for the ULN2004AIDR?
The device is available in SOIC (D) and PDIP 16 packages.
- Why are the input pins placed opposite the output pins?
The input pins are placed opposite the output pins to simplify board layout.
- What is the series base resistor value in the ULN2004AIDR?
The series base resistor value is 10.5 kΩ.
