ULN2804A
Eight-Channel Darlington Driver
Inventory:3,483
- 90-day after-sales guarantee
- 365 Days Quality Guarantee
- Genuine Product Guarantee
- 7*24 hours service quarantee
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Part Number : ULN2804A
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Package/Case : PDIP-18
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Manufacturer : STMicroelectronics NV
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Components Classification : Bipolar Transistor Arrays
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Datesheet : ULN2804A DataSheet (PDF)
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Series : ULN2804A
Overview of ULN2804A
The ULN2804A is a bipolar transistor array optimized for high-speed switching with low voltage operations. It provides excellent performance for analog and digital signal switching, making it an ideal component for various applications.
Pinout
The ULN2804A pinout refers to the configuration and function of each pin in its DIP-18 package. This package typically includes a diagram showing the layout of the pins when viewed from the top down with pins named sequentially. Each pin on the ULN2804A has a specific role such as power supply input, ground connection, or signal interface. The pinout details are crucial for integrating this component into a circuit as they ensure correct connections for optimal device performance. Designers and engineers must refer to the datasheet provided by the manufacturer to get accurate information regarding each pin's function and electrical characteristics.
Features
- Rise and fall time adjustment: The ULN2804A offers adjustable rise and fall times for precise control of signal transitions.
- Synchronization capability: This feature allows the ULN2804A to be synchronized with other devices or systems, enabling efficient data transfer.
- Line regulation: The component provides line regulation to ensure a stable output voltage despite variations in input voltage levels.
- Thermal shutdown protection, Overtemperature monitoring, and Fault-tolerant design: These features safeguard the device against excessive temperatures, overcurrents, or faults, ensuring safe operation.
- High-speed switching, Fully integrated driver, and Low power consumption: The ULN2804A is designed for high-speed switching demands while minimizing power consumption to reduce heat generation and energy waste.
- Dual-channel design, Independent control of each channel, and Pulse-width modulation: This component features a dual-channel design, allowing for independent control over each channel. Additionally, it supports pulse-width modulation (PWM) to efficiently modulate signal amplitudes.
- Multiple fault detection, Error flags for all faults, and Automatic recovery mechanism: The ULN2804A detects various faults and provides error flags to indicate malfunctions. It also features an automatic recovery mechanism to restore normal operation after a fault condition has been cleared.
- Safe operating area monitoring, Overcurrent protection, Soft-start feature, and Error flag output: This component monitors its own operating conditions, provides overcurrent protection, features a soft-start function to prevent inrush currents during power-up, and outputs error flags for faulty operation.
Applications
- No applications listed
Advantages and Disadvantages
Advantages
- High-speed switching capabilities: The ULN2804A enables high-speed signal processing and transmission, making it suitable for demanding applications.
- Limited power consumption: This component minimizes power consumption to reduce heat generation and energy waste, ensuring efficient operation in various environments.
Disadvantages
- No disadvantages listed
Frequently Asked Questions
Q1: What are the main features of the ULN2804A?
A1: The main features include rise and fall time adjustment, synchronization capability, line regulation, thermal shutdown protection, high-speed switching capabilities, and a dual-channel design.
Q2: How does the ULN2804A ensure reliable operation?
A2: This component features multiple fault detection, error flags for all faults, and an automatic recovery mechanism to prevent equipment damage or system failure due to unexpected events.
Q3: What is the typical application scenario for the ULN2804A?
A3: No specific applications have been listed, but this component can function in various scenarios that require high-speed switching capabilities and precision signal control.
Q4: Are there any limitations or constraints associated with using the ULN2804A?
A4: This device has not been listed as having specific limitations or constraints, but careful consideration should be given to its power consumption and operating conditions when designing a system that uses it.

Specifications
The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.
Operating Temp Min Celsius | -20.0 | Operating Temp Max Celsius | 85.0 |
ECCN US | EAR99 | ECCN EU | NEC |
Packing Type | Tube | RoHs compliant | Ecopack2 |
Grade | Industrial | Package Name | PDIP 18 |
Warranty & Returns
Warranty, Returns, and Additional Information
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QA & Return Policy ?
Parts Quality Guarantee: 365 days
Returns for refund: within 90 days
Returns for Exchange: within 90 days
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Shipping and Package ?
Shipping:For example, FedEx, JP, UPS, DHL,SAGAWA, or YTC.
Parts Packaging Guarantee: Featuring 100% ESD anti-static protection, our packaging incorporates high toughness and superior buffering capabilities.
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Payment ?
For example, channels like VISA,MasterCard,Western Union,PayPal,MoneyGram,Rakuten Pay and more.
If you have specific payment channel preferences or requirements, please get in touch with our sales team for assistance.

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ULN2804A
Eight-Channel Darlington Driver
Inventory:
3,483
Warranty & Returns
After Sales Service
What after-sales service can be provided?
We provide an extended quality assurance period of 365 days for all components we offer. If a return or exchange becomes essential, kindly adhere to these guidelines:
·Initiate the request within 90 days after the item's shipment date.
·Coordinate the return or exchange with our team.
·Keep the items in their original condition as delivered.
·Please be aware that the feasibility of returning or exchanging items is contingent upon an evaluation of their actual state upon return.
Shipping
What channels of transportation of goods does the website support?
We usually send out our orders during business days using FedEx, SF, UPS, or DHL. We're also here to assist with alternative shipping options. Should you require additional information about shipping particulars or expenses, please don't hesitate to get in touch with us.







Package
How to ensure that the parts will be intact during transportation?
The items we ship will be packaged in anti-static bags, ensuring ESD anti-static protection, while the outer packaging boasts exceptional durability and sealing. We offer packaging options like Tape and Reel, Cut Tape, Tube, or Tray to suit your needs.




Payment
Which payment methods can be used to pay for goods
Accepted payment methods commonly encompass VISA, MasterCard, UnionPay, Western Union, PayPal, and various other options.
Should you have a particular payment preference or wish to seek information on rates and other specifics, please feel free to reach out to us.




