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Product Detailed Parameters
- Description：50V 7-CHANNEL DARLINGTON TRANSIS
- Series：-
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- Transistor Type：7 NPN Darlington
- Current - Collector (Ic) (Max)：500mA
- Voltage - Collector Emitter Breakdown (Max)：50V
- Vce Saturation (Max) @ Ib, Ic：1.6V @ 500µA, 350mA
- Current - Collector Cutoff (Max)：50µA
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Power - Max：-
- Frequency - Transition：-
- Operating Temperature：-40°C ~ 70°C (TA)
- Mounting Type：Surface Mount
- Package / Case：SOT-23-16 Thin, SOT-23 Variant
- Supplier Device Package：16-SOT-23-THIN
- Grade：-
- Qualification：-
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Overview
The ULN2004ADYYR is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven NPN Darlington pairs within a single package, designed to interface low-power logic circuits with higher-power loads. The device features a collector-emitter voltage rating of 50 V and supports continuous output currents up to 300 mA per channel. It operates reliably across an extended temperature range from -40°C to +70°C. The component is housed in a compact SOT-23-THN (DYY) surface-mount package with 16 pins, facilitating efficient PCB layout for space-constrained applications requiring multiple switching channels.
Feature Summary
- Integrates seven independent NPN Darlington transistor pairs for multi-channel load driving
- Features built-in clamping diodes on each output to suppress inductive kickback from reactive loads
- Designed with enhanced input capability allowing direct drive from 15V logic sources
Applications
- Relay driver circuits for industrial control systems
- Hammer drivers for dot matrix printers
- Lamp drivers for lighting control applications
- LED display drivers for visual indicators
Procurement Notes
Verify the specific suffix DYY corresponds to the SOT-23-THN package configuration when sourcing. Confirm that the manufacturer designation aligns with Texas Instruments specifications. Ensure the component meets the required operating temperature range of -40°C to +70°C for the intended environment. Cross-reference the part number against official distributor catalogs to confirm current availability status and authenticity.
Selection Notes
Select this component when multiple high-voltage switching channels are required in a minimal footprint. The integrated Darlington structure provides high current gain suitable for direct logic interfacing. Consider the thermal performance of the SOT-23-THN package under maximum load conditions. Verify that the 50V breakdown voltage and 300mA current capacity exceed the peak requirements of the connected loads.
Part Context
This part belongs to the ULN200xA series of high-voltage Darlington arrays. The series is widely used for driving relays, lamps, and displays. The ADYYR variant specifically denotes the surface-mount DYY package option. It complements through-hole variants like the ULN2004AN for different assembly requirements.
Replacement Considerations
Compatible substitutes include the ULN2003A for lower current applications or other ULN200x series variants with matching pinouts. Verify electrical parameters such as voltage ratings and current capabilities before substitution. Ensure the replacement package matches the physical dimensions and thermal characteristics of the original design.
