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Product Detailed Parameters
- Description：TRANS 4NPN DARL 50V 1.75A 16DIP
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Transistor Type：4 NPN Darlington (Quad)
- Current - Collector (Ic) (Max)：1.75A
- Voltage - Collector Emitter Breakdown (Max)：50V
- Vce Saturation (Max) @ Ib, Ic：1.4V @ 2mA, 1.25A
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Power - Max：1W
- Frequency - Transition：-
- Operating Temperature：-20°C ~ 85°C (TA)
- Mounting Type：Through Hole
- Package / Case：16-PowerDIP (0.300", 7.62mm)
- Supplier Device Package：16-PowerDIP (20x7.10)
- Grade：-
- Qualification：-
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Overview
The ULN2066B is a quad NPN Darlington transistor array manufactured by STMicroelectronics, designed to interface logic circuits with high-current and high-voltage loads. Each of the four switches delivers an output current up to 1.5 A. The device features a specified minimum breakdown voltage of 50 V and a sustaining voltage of 35 V measured at 100 mA. It includes integral suppression diodes for inductive load protection and utilizes common emitters. The inputs are compatible with 6-15 V CMOS and PMOS logic families.
Feature Summary
- Contains four independent NPN Darlington switches for driving high-current loads
- Includes integral suppression diodes to protect against inductive load transients
- Inputs compatible with 6-15 V CMOS and PMOS logic families
- Features common emitter configuration for simplified circuit design
Applications
- Driving inductive loads such as relays and solenoids
- Interface between low-power logic controllers and high-voltage actuators
- General-purpose switching in industrial control systems
Procurement Notes
Verify the specific datasheet revision and package variant when sourcing. Confirm input logic compatibility requirements match the system's 6-15 V CMOS or PMOS levels. Ensure thermal management meets the 1.5 A per channel rating under actual operating conditions. Check for availability of DIP-16 packages if through-hole mounting is required.
Selection Notes
Select this component when interfacing with 6-15 V CMOS or PMOS logic rather than standard 5 V TTL. Choose over ULN2064B or ULN2068B if pre-driver stages are not needed but direct CMOS/PMOS compatibility is essential. Verify that the 50 V breakdown voltage suffices for the specific load voltage requirements.
Part Context
The ULN2066B belongs to the ULN20xx series of Darlington arrays from STMicroelectronics. It shares the same pinout and electrical characteristics as the ULN2064B and ULN2068B, differing primarily in input logic compatibility. While ULN2064B and ULN2068B support 5 V logic, the ULN2066B is optimized for 6-15 V CMOS and PMOS inputs.
Replacement Considerations
ULN2064B and ULN2068B are functionally identical regarding switching capabilities and pinout. Substitution requires verifying that the system logic levels align with the 5 V compatibility of these alternatives, as they differ from the ULN2066B's 6-15 V CMOS/PMOS specification.
