Allicdata Part #: | 497-2351-5-ND |
Manufacturer Part#: |
ULN2068B |
Price: | $ 1.95 |
Product Category: | Discrete Semiconductor Products |
Manufacturer: | STMicroelectronics |
Short Description: | TRANS 4NPN DARL 50V 1.75A 16DIP |
More Detail: | Bipolar (BJT) Transistor Array 4 NPN Darlington (Q... |
DataSheet: | ULN2068B Datasheet/PDF |
Quantity: | 4085 |
1 +: | $ 1.77660 |
10 +: | $ 1.59768 |
100 +: | $ 1.28419 |
500 +: | $ 1.05510 |
1000 +: | $ 0.87422 |
Specifications
Series: | -- |
Packaging: | Tube |
Part Status: | Active |
Transistor Type: | 4 NPN Darlington (Quad) |
Current - Collector (Ic) (Max): | 1.75A |
Voltage - Collector Emitter Breakdown (Max): | 50V |
Vce Saturation (Max) @ Ib, Ic: | 1.4V @ 2mA, 1.25A |
Current - Collector Cutoff (Max): | -- |
DC Current Gain (hFE) (Min) @ Ic, Vce: | -- |
Power - Max: | 1W |
Frequency - Transition: | -- |
Operating Temperature: | -20°C ~ 85°C (TA) |
Mounting Type: | Through Hole |
Package / Case: | 16-PowerDIP (0.300", 7.62mm) |
Supplier Device Package: | 16-PowerDIP (20x7.10) |
Description
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The ULN2068B is an array of eight Darlington transistors designed to be used as high-current-gain switches. This device can be used in applications requiring high power switch control, including contact discharge ignitions, relay drives, heating elements and other applications. The device is also suitable for interfacing between digital and analog circuits.The ULN2068B is constructed by connecting eight Darlington transistors, each of which has an emitter-collector breakdown voltage of 50V and an off-state collector-emitter voltage of 100V. This chip has an improved output capability over the older ULN2060A and 2062A due to the addition of a drain isolation resistor and an integrated Schottky diode.The ULN2068B is designed for low-voltage, high-current switch control applications. The maximum allowable input voltage is 7V and the maximum conduction current is 800mA for each channel.The working principle of the ULN2068B is to allow current to flow between its two terminals, the input and the output. When the input is high, the output is held low. When the input is low, the output gets pulled up. This device operates using the same principle as a simple switch, but due to its multiple Darlington transistors, is able to handle more current than a simple switch.Each Darlington transistor consists of two transistors. The output cascades through a series of these transistors, acting as an amplifier, increasing the current gain of the device. This enables the ULN2068B to be used in applications needing high current gains such as contact discharge ignitions, relay drives and heating elements. The ULN2068B also has an input pull down resistor. This resistor allows the ULN2068B to reject a large voltage noise at the input terminal. Without this resistor, the noise at the input terminal could falsely trigger the drive circuit, causing the output to switch on or off prematurely.Due to the inclusion of the Schottky diode on the ULN2068B chip, the current flow through each transistor is protected against stray reverse voltages. This ensures that the transistors in the ULN2068B remain safe at high voltages, protecting them against damage. The Schottky diode also helps to reduce the power supply ripple, further protecting the transistors contained within the ULN2068B.The ULN2068B is a highly versatile device that can be used in a number of applications. Some of the most common applications include contact discharge ignitions, relay drives, heating element control, and digital to analog signal conversion. The device is also used in a variety of consumer electronics and automotive applications.The ULN2068B is a great option for applications requiring high current gains. The device is highly versatile and able to handle a variety of applications with its Darlington transistor configuration and Schottky diode protection. With its robust design and wide range of features, the ULN2068B is an excellent choice for many switch control applications.
The specific data is subject to PDF, and the above content is for reference
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