Overview
The ULN2004ANG4, 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 for switching inductive loads. The ULN2004A is designed to operate directly with CMOS devices that use supply voltages of 6V to 15V, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | 50 | V |
| Continuous Collector Current | 500 | mA |
| Peak Collector Current | 600 | mA |
| Input Voltage (for ULN2004A) | 6 - 15 | V |
| Operating Ambient Temperature Range | -40 to 85 | °C |
| Storage Temperature Range | -55 to 150 | °C |
| Junction Temperature | 150 | °C |
| Package Type | PDIP (16-pin) | |
| Thermal Resistance Junction-Ambient (DIP-16) | 70 | °C/W |
Key Features
- Seven Darlington pairs per package with high-voltage outputs up to 50V
- Output current rating of 500 mA per driver (600 mA peak)
- Integrated suppression diodes for inductive load driving
- Outputs can be paralleled for higher current capability
- Inputs compatible with TTL, CMOS, PMOS, and DTL logic families
- Input pins placed opposite to output pins to simplify board layout
- 10.5kΩ series base resistor for each Darlington pair to allow operation directly from CMOS devices with supply voltages of 6V to 15V
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers (LED and gas discharge)
- Display drivers
- Line drivers
- Logic buffers
- Solenoids and DC motors
- Thermal printheads
- High-power buffers
Q & A
- What is the maximum output voltage of the ULN2004A?
The maximum output voltage of the ULN2004A is 50V.
- What is the continuous collector current rating of the ULN2004A?
The continuous collector current rating is 500 mA per driver.
- Can the outputs of the ULN2004A be paralleled for higher current?
- What types of logic families are compatible with the ULN2004A inputs?
The inputs are compatible with TTL, CMOS, PMOS, and DTL logic families.
- What is the operating ambient temperature range of the ULN2004A?
The operating ambient temperature range is -40 to 85°C.
- What is the purpose of the integrated suppression diodes in the ULN2004A?
The integrated suppression diodes are for driving inductive loads.
- What is the package type of the ULN2004ANG4?
The package type is PDIP (16-pin).
- What is the thermal resistance junction-ambient for the DIP-16 package?
The thermal resistance junction-ambient is 70°C/W.
- Can the ULN2004A be used with CMOS devices?
- What are some common applications of the ULN2004A?
Common applications include relay drivers, lamp drivers, display drivers, line drivers, and logic buffers.
