ULQ2804A STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
ULQ2804A is an 8-channel Darlington transistor array driver IC in DIP-18 package, featuring open-collector outputs rated at 50V and 500mA sink current. Provides buffered peripheral driving for inductive loads. Available from stock worldwide.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 18
- Lifecycle
- ACTIVE
- Datasheet
- ULQ2804A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6840(MOQ 100)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8-channel open-collector Darlington array with 50V, 500mA per-channel output rating
- Built-in transient voltage suppression diodes for inductive load protection
- Compatible with TTL, CMOS, and PMOS logic inputs for flexible interfacing
Applications
The ULQ2804A is widely used for driving relays, solenoids, motors, and LED displays in industrial automation and consumer electronics. Its 8 buffered channels allow direct control of multiple inductive loads from a single MCU port. It is also suitable for printer head drivers and lamp drivers operating up to 50V.
Specifications
| Factory Lead Time | 10Weeks |
| YTEOL | 6 |
| Built-in Protections | TRANSIENT |
| Driver Number of Bits | 8 |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PDIP-T18 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Current Flow Direction | SINK |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP18,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Surface Mount | NO |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Turn-off Time | 1 µs |
| Turn-on Time | 1 µs |
| Package | Dual-In-Line Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Mainland China, Malaysia |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ULQ2804A:
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Frequently Asked Questions
What is the maximum output voltage and sink current per channel for the ULQ2804A?
Each of the 8 channels in the ULQ2804A can sustain up to 50V at the output and sink up to 500mA of continuous collector current, making it well-suited for driving medium-power inductive loads such as relays and solenoids.
Which logic families are compatible with the ULQ2804A inputs?
The ULQ2804A accepts inputs from TTL, CMOS, and PMOS logic families operating at standard voltage levels. The device can be directly driven by 3.3V or 5V microcontrollers without additional level-shifting circuitry, simplifying system design.
How does the ULQ2804A protect against inductive kickback when driving relays?
The ULQ2804A integrates built-in transient suppression diodes (flyback diodes) across each output channel. When driving inductive loads such as relay coils or solenoids, these diodes clamp voltage spikes to protect both the driver IC and connected circuitry, eliminating the need for 8 external protection diodes.
What DIP-18 package dimensions should be considered when routing the ULQ2804A on a PCB?
The ULQ2804A comes in an 18-pin DIP package with 2.54mm (100 mil) pin pitch, occupying a board footprint of approximately 22.86mm x 7.62mm. This through-hole package simplifies hand-soldering and prototyping, though it requires more board area than surface-mount alternatives.
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About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 100+ | $2.6000 | $260.00 |
| 260+ | $2.4700 | $642.20 |
| 500+ | $2.0400 | $1020.00 |
| 1000+ | $1.7300 | $1730.00 |
| 2000+ | $1.7100 | $3420.00 |
| 4000+ | $1.6840 | $6735.80 |
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