ULQ2001A STMicroelectronics Integrated Circuit (Dual-In-Line Packages) In Stock
The ULQ2001A is a 7-channel NPN Darlington transistor array rated at 50 V and 500 mA per channel with built-in transient suppression diodes. Packaged in a 16-pin PDIP, it is RoHS-compliant and available from stock worldwide for industrial and consumer applications.
- Manufacturer
- STMicroelectronics
- Package
- Dual-In-Line Packages
- Pin Count
- 16
- Lifecycle
- ACTIVE
- Datasheet
- ULQ2001A Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.2787(MOQ 10)
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ULQ2001A?
- 7 NPN Darlington transistor channels in a single 16-pin PDIP package, each rated at 50 V / 500 mA for driving high-current loads
- Built-in transient suppression (flyback) diodes on each output protecting against inductive load switching spikes up to 50 V
- Standard-input compatible interface accepting TTL and CMOS logic signals for direct microcontroller or PLC output driving without external circuitry
What is ULQ2001A used for?
The ULQ2001A is widely used to drive inductive loads such as relays, solenoids, and stepper motor coils from low-current logic signals in industrial automation and control systems. Its 7 Darlington channels make it ideal for LED matrix driving, lamp drivers, and printer head control circuits where multiple high-current outputs are required from a compact 16-pin PDIP package.
What are the specifications of ULQ2001A?
| Reach Compliance Code | Compliant |
| Factory Lead Time | 10Weeks |
| YTEOL | 5.62 |
| Built-in Protections | TRANSIENT |
| Driver Number of Bits | 7 |
| Input Characteristics | STANDARD |
| Interface IC Type | BUFFER OR INVERTER BASED PERIPHERAL DRIVER |
| JESD-30 Code | R-PDIP-T16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Characteristics | OPEN-COLLECTOR |
| Output Current Flow Direction | SINK |
| Output Peak Current Limit-Nom | 0.5A |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | DIP16,.3 |
| Package Shape | RECTANGULAR |
| Package Style | IN-LINE |
| Peak Reflow Temperature (Cel) | NOT SPECIFIED |
| Surface Mount | YES |
| Technology | BIPOLAR |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | THROUGH-HOLE |
| Terminal Pitch | 2.54mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | NOT SPECIFIED |
| 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 |
Where can I find the ULQ2001A datasheet?
ULQ2001A Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for ULQ2001A?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the maximum voltage and current rating per channel for the ULQ2001A?
Each of the 7 Darlington channels in the ULQ2001A is rated for a maximum collector voltage of 50 V and a continuous collector current of 500 mA. This allows direct switching of relays, solenoids, and other inductive loads from standard TTL or CMOS logic outputs without additional driver transistors.
Does the ULQ2001A require external flyback diodes when driving relay coils?
No, the ULQ2001A includes built-in transient suppression diodes on every output channel, eliminating the need for external flyback diodes when switching inductive loads up to 50 V. This simplifies PCB design and reduces component count in relay-driving and solenoid-driving applications.
How does the ULQ2001A compare with the ULN2003A for driving 7 relays simultaneously?
Both the ULQ2001A and ULN2003A are 7-channel Darlington arrays rated at 50 V / 500 mA per channel with built-in flyback diodes. The ULQ2001A from STMicroelectronics is pin-compatible with the ULN2003A, making it a direct drop-in alternative; selection between them typically depends on supplier availability and pricing rather than electrical performance.
Can the ULQ2001A interface directly to a 3.3 V microcontroller GPIO to drive 12 V relays?
Yes, the ULQ2001A accepts standard TTL and CMOS input levels. A GPIO outputting 3.3 V logic high provides sufficient base drive to saturate each Darlington channel, allowing it to switch 12 V relay coils drawing up to 500 mA while the microcontroller I/O remains isolated from the high-side load voltage.
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Why Buy from FindMyChip
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 |
|---|---|---|
| 10+ | $0.4970 | $4.97 |
| 100+ | $0.3900 | $39.00 |
| 500+ | $0.3500 | $175.00 |
| 1000+ | $0.3270 | $327.00 |
| 12000+ | $0.2838 | $3405.96 |
| 24000+ | $0.2787 | $6688.08 |
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