Overview
The ULN2004ADE4, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device consists of seven NPN Darlington pairs, each featuring high-voltage outputs with common-cathode clamp diodes. These diodes are essential for switching inductive loads, making the ULN2004ADE4 versatile for various applications. The device is packaged in a 16-pin SOIC (Small Outline Integrated Circuit) package, which is compact and suitable for a wide range of electronic systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOIC (16) | - |
| Pins | 16 | - |
| Operating Temperature Range | -40 to 85 | °C |
| Output Voltage | 50 | V |
| Continuous Collector Current | 500 | mA |
| Peak Collector Current | 600 | mA |
| Input Voltage (for ULN2004A) | 6 to 15 | V |
| Clamping Diode Continuous Current | 350 | mA |
| Clamping Diode Reverse Voltage | 50 | V |
| Junction Temperature | 150 | °C |
| Electrostatic Discharge Rating - HBM | 2 | kV |
Key Features
- Seven Darlington pairs per package with common emitters.
- High-voltage outputs: 50V.
- Output current rating: 500 mA per driver, with a peak current of 600 mA.
- Integrated suppression diodes for inductive load driving.
- Inputs compatible with TTL, CMOS, PMOS, and DTL logic families.
- Inputs placed opposite to output pins to simplify board layout.
- 10.5kΩ series base resistor for each Darlington pair, allowing operation directly from CMOS devices with supply voltages of 6V to 15V.
Applications
- Relay drivers.
- Hammer drivers.
- Lamp drivers.
- Display drivers (LED and gas discharge).
- Line drivers.
- Logic buffers.
- Solenoids and DC motor drivers.
- Thermal printheads.
- High-power buffers.
Q & A
- What is the ULN2004ADE4 used for?
The ULN2004ADE4 is used as a high-voltage, high-current Darlington transistor array for driving various loads such as relays, solenoids, DC motors, and display drivers.
- What is the package type of the ULN2004ADE4?
The ULN2004ADE4 is packaged in a 16-pin SOIC (Small Outline Integrated Circuit) package.
- What is the maximum output voltage of the ULN2004ADE4?
The maximum output voltage is 50V.
- What is the continuous collector current rating of the ULN2004ADE4?
The continuous collector current rating is 500 mA, with a peak current of 600 mA.
- Can the outputs of the ULN2004ADE4 be paralleled for higher current capability?
- What types of logic families are the inputs of the ULN2004ADE4 compatible with?
The inputs are compatible with TTL, CMOS, PMOS, and DTL logic families.
- What is the purpose of the integrated suppression diodes in the ULN2004ADE4?
The integrated suppression diodes are for driving inductive loads.
- What is the operating temperature range of the ULN2004ADE4?
The operating temperature range is -40 to 85°C.
- Is the ULN2004ADE4 RoHS compliant?
- What is the electrostatic discharge rating of the ULN2004ADE4?
The electrostatic discharge rating is 2 kV (HBM).
