Overview
The ULN2003AIDRE4 is a high-voltage, high-current Darlington transistor array produced by Texas Instruments. This device consists of seven NPN Darlington pairs, each featuring high-voltage outputs with common-cathode clamp diodes, which are essential for switching inductive loads. The ULN2003AIDRE4 is designed to operate directly with TTL or 5V CMOS devices, making it versatile for various applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector Current (single output) | 500 | mA |
| High-Voltage Outputs | 50 | V |
| Operating Temperature Range | -40 to 105 | °C |
| Package Type | SOIC (D) | |
| Number of Pins | 16 | |
| Series Base Resistor | 2.7kΩ | |
| Collector-Emitter Saturation Voltage | 0.9 - 1.6 | V |
| Clamp Forward Voltage | 1.7 - 2.2 | V |
| Off-State Input Current | 30 - 65 | μA |
Key Features
- 500mA-rated collector current per single output
- High-voltage outputs up to 50V
- Output clamp diodes for inductive load switching
- Inputs compatible with TTL and 5V CMOS devices
- 2.7kΩ series base resistor for each Darlington pair
- Common-cathode clamp diodes
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers
- Logic buffers
Q & A
- What is the collector current rating of a single Darlington pair in the ULN2003AIDRE4?
The collector current rating of a single Darlington pair is 500mA.
- What is the maximum high-voltage output of the ULN2003AIDRE4?
The maximum high-voltage output is 50V.
- What type of logic inputs are compatible with the ULN2003AIDRE4?
The inputs are compatible with TTL and 5V CMOS devices.
- What is the purpose of the output clamp diodes in the ULN2003AIDRE4?
The output clamp diodes are for switching inductive loads.
- What is the operating temperature range of the ULN2003AIDRE4?
The operating temperature range is -40°C to 105°C.
- How many Darlington pairs are included in the ULN2003AIDRE4?
The device includes seven NPN Darlington pairs.
- Can the Darlington pairs be paralleled for higher current capability?
- What is the value of the series base resistor in each Darlington pair?
The series base resistor is 2.7kΩ for each Darlington pair.
- What are some common applications of the ULN2003AIDRE4?
Common applications include relay drivers, hammer drivers, lamp drivers, display drivers, line drivers, and logic buffers.
- What package type and pin count does the ULN2003AIDRE4 come in?
The device comes in a SOIC (D) package with 16 pins.
