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STMicroelectronics 4-Channel Darlington Transistor Array, NPN, 500 mA 50 V, 16-Pin PDIP ULN2068B
Specifications
| Country of Origin | India |
|---|---|
| Brand | STMicroelectronics |
| Height | 5.1mm |
| Length | 20mm |
| Model | ULN2068B |
| Mount Type | Through Hole |
| Series | ULN2068B |
| Maximum Operating Temperature | 85°C |
| Package Type | PDIP |
| Minimum Operating Temperature | -20°C |
| Pin Count | 16 |
| Maximum Continuous Collector Current Ic | 500mA |
| Maximum Collector Emitter Voltage Vceo | 50V |
| Number of Elements per Chip | 4 |
| Transistor Polarity | NPN |
| Maximum Emitter Base Voltage VEBO | 50V |
| Maximum Collector Emitter Saturation Voltage VceSAT | 1.1V |
| Maximum Power Dissipation Pd | 4.3W |
| Quad darlington switch,ULN2068B POWDIP16Brand | STMicroelectronics |
Key Features
- Includes four NPN Darlington transistor pairs in a single package.
- Can drive up to 500 mA per channel with a maximum voltage of 50 V.
- 16-pin PDIP package suitable for standard through-hole mounting.
- Integrated suppression diodes provide protection against inductive loads.
- Compatible with TTL and CMOS logic input signals.
- Low collector-emitter saturation voltage ensures efficient switching.
Product Description
The STMicroelectronics ULN2068B is a robust 4-channel Darlington transistor array designed to drive high-voltage and high-current loads in industrial, automation, and control applications. As an integrated solution, it consists of four NPN Darlington pairs with integral suppression diodes, allowing it to directly drive inductive loads such as relays, solenoids, and lamps with enhanced reliability and simplified board routing.
Each output channel of the ULN2068B supports a maximum continuous collector current of 500 mA and operates at collector-emitter voltages up to 50 V, ensuring suitability for demanding load-switching scenarios. The low saturation voltage of 1.1 V helps minimize power dissipation and heat generation during operation, which is crucial for consistent performance in compact designs.
Housed in a standard 16-pin PDIP package, the component is well suited for through-hole PCB assembly and offers straightforward pinout with outputs opposite the inputs. This simplifies board layout, especially when used in tandem with TTL or CMOS logic circuits for efficient signal interfacing. The ULN2068B is designed to operate reliably within a temperature range of -20°C to 85°C, supporting performance stability across a wide range of environments.
The integrated suppression diodes protect the IC from voltage spikes generated by switching inductive loads, contributing to prolonged operational lifetime and equipment safety. With a total of four elements per chip and compact dimensions, the ULN2068B is well adapted for use in relay drivers, motor controllers, lighting interfaces, and miscellaneous actuation tasks in both industrial and commercial control systems.
Whether you are developing equipment for automation, industrial process control, robotics, or general-purpose electronic switching, the ULN2068B offers a versatile and reliable solution for high-side switching and load driving. Its combination of current capacity, voltage tolerance, and integrated protection enables engineers to streamline designs and reduce component count.
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Frequently Asked Questions
The ULN2068B supports a maximum continuous collector current of 500 mA per channel.
This model can operate at a maximum collector-emitter voltage of 50 V.
The operating temperature range for this unit is from -20°C to 85°C.
It is housed in a standard 16-pin PDIP package suitable for through-hole mounting.
The ULN2068B contains four NPN Darlington pairs per chip.
The maximum power dissipation for the ULN2068B is 4.3 W.
The integrated suppression diodes provide protection against voltage spikes generated by inductive loads, enhancing reliability.
Yes, this model is compatible with both TTL and CMOS logic input signals.
The maximum collector-emitter saturation voltage is 1.1 V.
It is suitable for applications such as relay drivers, motor controllers, and lighting interfaces.
The dimensions of this unit are 20 mm in length and 5.1 mm in height.
The transistor polarity for this model is NPN.
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