Overview
The ULN2068B is a high-voltage, high-current quad Darlington switch array produced by STMicroelectronics. This device is designed to interface logic circuits with a wide variety of high current, high voltage loads. It contains four NPN Darlington switches, each capable of delivering up to 1.5 A with a specified minimum breakdown voltage of 50 V and a sustaining voltage of 35 V at 100 mA. The ULN2068B is particularly useful for applications requiring high current and voltage handling, such as driving LEDs, relays, and other inductive loads.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage (VCEX) | 50 | V |
| Output Sustaining Voltage (VCE(SUS)) | 35 | V |
| Output Current (IO) | 1.5 | A |
| Input Voltage (VI) | 15 | V |
| Input Current (II) | 25 | mA |
| Supply Voltage for ULN2068B | 10 | V |
| Power Dissipation at TPINS = 90 °C | 4.3 | W |
| Operating Ambient Temperature Range | -20 to 85 | °C |
| Storage Temperature | -55 to 150 | °C |
Key Features
- Four NPN Darlington switches with common emitters
- Output current up to 1.5 A per switch
- Minimum breakdown voltage of 50 V and sustaining voltage of 35 V
- Integral suppression diodes for inductive loads
- Compatible with popular 5 V logic families
- Includes a pre-driver stage to reduce loading on the control logic
- PowerDIP-16 package
Applications
The ULN2068B is suitable for a variety of applications, including:
- Driving LEDs and LED displays
- Controlling relays and solenoids
- Managing inductive loads such as motors and transformers
- Interface between logic circuits and high current/voltage devices
- Emitter follower configurations
Q & A
- What is the maximum output current of the ULN2068B?
The maximum output current of the ULN2068B is 1.5 A per switch. - What is the minimum breakdown voltage of the ULN2068B?
The minimum breakdown voltage of the ULN2068B is 50 V. - Does the ULN2068B have integral suppression diodes?
Yes, the ULN2068B has integral suppression diodes for inductive loads. - What is the operating ambient temperature range of the ULN2068B?
The operating ambient temperature range of the ULN2068B is -20 to 85 °C. - Is the ULN2068B compatible with 5 V logic families?
Yes, the ULN2068B is compatible with popular 5 V logic families. - What package type is the ULN2068B available in?
The ULN2068B is available in a PowerDIP-16 package. - What is the purpose of the pre-driver stage in the ULN2068B?
The pre-driver stage in the ULN2068B reduces loading on the control logic. - Can the ULN2068B be used for driving motors and transformers?
Yes, the ULN2068B can be used for managing inductive loads such as motors and transformers. - What is the storage temperature range for the ULN2068B?
The storage temperature range for the ULN2068B is -55 to 150 °C. - How many Darlington switches does the ULN2068B contain?
The ULN2068B contains four NPN Darlington switches.
