Overview
The ULN2004AINSR, 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 designed for switching inductive loads. The ULN2004A is compatible with CMOS devices that use supply voltages ranging from 6V to 15V, making it versatile for various applications. It is particularly useful for driving high-current loads such as relays, solenoids, and LED displays.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector Current per Darlington Pair | 500 mA | mA |
| Peak Collector Current | 600 mA | mA |
| Output Voltage | 50 V | V |
| Series Base Resistor | 10.5 kΩ | kΩ |
| Input Capacitance | 15 - 25 pF | pF |
| Package Types | SOIC, PDIP, SOP, TSSOP | |
| Operating Temperature Range | -20°C to 85°C | °C |
Key Features
- Seven Darlington pairs per package
- Output current of 500 mA per driver (600 mA peak)
- Output voltage of 50 V
- Integrated suppression diodes for inductive loads
- Outputs can be paralleled for higher current capability
- TTL/CMOS/PMOS/DTL compatible inputs
- Input pins placed opposite to output pins to simplify board layout
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
- Solenoids and DC motors
- Thermal printheads
- High-power buffers
Q & A
- What is the ULN2004AINSR?
The ULN2004AINSR is a high-voltage, high-current Darlington transistor array produced by Texas Instruments.
- What is the collector current rating of a single Darlington pair in the ULN2004A?
The collector current rating of a single Darlington pair is 500 mA, with a peak current of 600 mA.
- What is the output voltage capability of the ULN2004A?
The output voltage capability is 50 V.
- What type of inputs are compatible with the ULN2004A?
The ULN2004A is compatible with TTL, CMOS, PMOS, and DTL inputs.
- What is the purpose of the integrated suppression diodes in the ULN2004A?
The integrated suppression diodes are designed for switching inductive loads.
- Can the outputs of the ULN2004A be paralleled for higher current capability?
- What are some common applications of the ULN2004A?
Common applications include relay drivers, hammer drivers, lamp drivers, display drivers, line drivers, and logic buffers.
- What are the available package types for the ULN2004A?
The ULN2004A is available in SOIC, PDIP, SOP, and TSSOP packages.
- What is the operating temperature range of the ULN2004A?
The operating temperature range is -20°C to 85°C.
- How does the ULN2004A differ from the ULN2003A?
The main difference is in the series base resistor value, with the ULN2004A having a 10.5 kΩ resistor for operation with CMOS devices using supply voltages of 6V to 15V, whereas the ULN2003A has a 2.7 kΩ resistor for operation with TTL or 5V CMOS devices.
