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ULN2803G-D18-T

Name: ULN2803G-D18-T
Rating: 4.7 (12 reviews)

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資料表 ULN2803G-D18-T DataSheet
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規格

Manufacturer	UTC(Unisonic Tech)
Package	DIP-18
number of channels	Eight channels

概述

Description

The ULN2803G-D18-T is an integrated circuit that houses eight NPN Darlington transistor pairs, designed for driving loads in various applications, such as relays, lamps, and motors. It features high-voltage and high-current capabilities, allowing it to switch loads up to 50V and 500mA per channel. The device accepts standard TTL or CMOS logic levels, making it compatible with microcontrollers and other digital logic devices.
The ULN2803G also includes built-in flyback diodes, which protect the circuit from voltage spikes when switching inductive loads. The IC is often packaged in a 18-pin DIP or surface mount format, facilitating easy integration into electronic projects. Its applications range from automation systems to hobbyist electronics, providing efficiency and reliability in load switching tasks.
Overall, the ULN2803G-D18-T is a versatile option for controlling high-power devices while interfacing with low-power digital signals.

Features

The ULN2803G-D18-T is an 8-channel high-voltage, high-current Darlington transistor array. Key features include:
1. Channels: Contains eight Darlington pairs, allowing control of multiple loads.
2. Voltage Rating: Supports up to 50V for output, making it suitable for various applications.
3. Current Rating: Each channel can handle up to 500mA, enabling control of larger loads.
4. Input Compatibility: Can interface directly with TTL or CMOS logic levels, simplifying integration with microcontrollers.
5. Protection: Features built-in flyback diodes for inductive load protection, enhancing reliability in motor and relay applications.
6. Package: Available in an 18-pin DIP package, facilitating easy PCB layout and integration.
7. Thermal Characteristics: Designed for high thermal dissipation, ensuring stable operation under load.
These features make the ULN2803G-D18-T ideal for driving relays, motors, and other inductive loads in automation and control systems.

Package

The ULN2803G-D18-T is packaged in a 18-pin DIP (Dual In-line Package) format. This package type is designed for through-hole mounting, making it suitable for various applications in electronics.

Pinout

The ULN2803G-D18-T is an integrated circuit that contains eight Darlington transistor pairs. It has a total of 18 pins. The pin functionalities are as follows:
1. Pins 1-8: Inputs (I1-I8) - These pins are connected to the control signals that activate the corresponding Darlington pairs.
2. Pins 9-16: Outputs (O1-O8) - These pins provide the output signals from the Darlington pairs, which can drive loads.
3. Pin 17: Common emitter (COM) - This pin is typically connected to the ground or the negative side of the load's power supply and is used for flyback diode protection when driving inductive loads.
4. Pin 18: Ground (GND) - This pin is used for the power supply ground connection.
The ULN2803G-D18-T is commonly used for driving relays, LEDs, and other high-current devices in applications such as interfacing with microcontrollers.

Manufacturer

The ULN2803G-D18-T is manufactured by Texas Instruments (TI), a prominent American technology company. Texas Instruments is well-known for designing and manufacturing semiconductors and various integrated circuits, including analog, digital signal processing, and microcontroller solutions. The company serves a wide range of industries, including automotive, industrial, communications, and consumer electronics. Texas Instruments is recognized for its innovation in electronic components and its commitment to quality and reliability in its products.

Application

The ULN2803G-D18-T is an octal high-voltage, high-current Darlington transistor array. It is commonly used in applications such as driving relays, motors, LEDs, and solenoids. It is also suitable for interfacing with microcontrollers and providing signal amplification in automation, robotics, and industrial control systems.

Equivalent

The ULN2803G-D18-T is a Darlington transistor array that can be replaced by several equivalent products, including:
1. ULN2803A
2. ULN2804A (with 4 channels)
3. ULN2003A (7-channel version, check current ratings)
Ensure that the pin configuration and electrical specifications meet your application requirements when selecting an equivalent.