Overview
The ULN2003ADRG4, produced by Texas Instruments, is a high-voltage, high-current Darlington transistor array. This device consists of seven NPN Darlington pairs, each capable of sinking up to 500 mA of collector current. It is designed for a wide range of applications, including relay drivers, solenoids, lamps, small motors, and LEDs. The ULN2003A is versatile and can operate directly with TTL or 5V CMOS devices due to its integrated series base resistors.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Collector Current (single output) | 500 | mA |
| High-Voltage Output | 50 | V |
| Operating Temperature Range | -40 to 70 | °C |
| Input Compatibility | TTL, 5V CMOS | |
| Propagation Delay Time (low- to high-level output) | 1 - 10 | μs |
| Propagation Delay Time (high- to low-level output) | 1 - 10 | μs |
| Collector-Emitter Saturation Voltage (VCE(sat)) | 0.9 - 1.7 | V |
| Package Type | SOIC (D), PDIP, SOP, TSSOP |
Key Features
- High-voltage outputs: 50V
- High-current capability: 500mA per Darlington pair
- Output clamp diodes for inductive loads
- Inputs compatible with TTL and 5V CMOS logic
- Integrated series base resistors for direct operation with logic devices
- High-current gain (β2) up to 10,000 A/A
Applications
- Relay drivers
- Solenoids
- Lamps
- Small motors
- LEDs
- Other high-current, high-voltage switching applications
Q & A
- What is the collector current rating of the ULN2003A?
The collector current rating of a single Darlington pair is 500 mA. The pairs can be paralleled for higher current capability.
- What is the operating voltage range for the ULN2003A?
The ULN2003A can operate with high-voltage outputs up to 50V.
- Is the ULN2003A compatible with TTL and CMOS logic?
- What type of loads can the ULN2003A handle?
The ULN2003A can handle inductive loads thanks to its output clamp diodes.
- What is the propagation delay time for the ULN2003A?
The propagation delay time for both low- to high-level and high- to low-level outputs is between 1 and 10 μs.
- What is the collector-emitter saturation voltage (VCE(sat)) of the ULN2003A?
The VCE(sat) ranges from 0.9 to 1.7 V.
- What are the package options for the ULN2003A?
The ULN2003A is available in SOIC (D), PDIP, SOP, and TSSOP packages.
- Is the ULN2003ADRG4 still in production?
No, the ULN2003ADRG4 is obsolete and no longer in production. New designs should consider an alternate product.
- What is the operating temperature range for the ULN2003A?
The operating temperature range is -40°C to 70°C.
- What is the high-current gain (β2) of the ULN2003A?
The high-current gain (β2) can be as high as 10,000 A/A at certain currents.
