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Product Detailed Parameters
- Description：TRANS 7NPN DARL 50V 0.5A 16DIP
- Series：ULx200xA
- Mfr：Texas Instruments
- Package：Tube
- Transistor Type：-
- Current - Collector (Ic) (Max)：-
- Voltage - Collector Emitter Breakdown (Max)：-
- Vce Saturation (Max) @ Ib, Ic：-
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Power - Max：-
- Frequency - Transition：-
- Operating Temperature：-40°C ~ 70°C (TA)
- Mounting Type：Through Hole
- Package / Case：16-DIP (0.300", 7.62mm)
- Supplier Device Package：16-PDIP
- Grade：-
- Qualification：-
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Overview
The ULN2004AN is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It integrates seven independent NPN Darlington pairs within a single 16-pin PDIP package. Each channel provides a maximum continuous collector current of 500 mA and supports a collector-emitter voltage rating of 50 V. The device features built-in internal clamping flyback diodes across each output to suppress inductive kickback from load switching. Designed for through-hole mounting, it operates reliably within an ambient temperature range of -20 °C to +70 °C.
Feature Summary
- Integrates seven independent NPN Darlington pairs for multi-channel control
- Includes internal clamping flyback diodes for inductive load protection
- Supports high-voltage operation with 50 V collector-emitter breakdown
- Provides high-current drive capability up to 500 mA per channel
Applications
- Driving stepper motors and solenoids
- Relay driver circuits
- Lamp and lighting control systems
- Logic-to-high-power interface buffering
Procurement Notes
Verify the specific manufacturer part number against official Texas Instruments documentation to confirm pinout compatibility and electrical ratings. Ensure the selected component matches the required DIP-16 through-hole package configuration. Cross-reference datasheet specifications for thermal management requirements under expected load conditions before finalizing procurement decisions.
Selection Notes
Select this component when multiple high-side switching channels are required in a compact form factor. The integrated flyback diodes simplify circuit design for inductive loads by eliminating external components. Verify that the 500 mA per-channel current limit meets the specific load requirements. Consider thermal dissipation capabilities if operating near maximum current limits or elevated temperatures.
Part Context
This component belongs to the ULN2003A series family of Darlington arrays. While functionally similar to the ULN2003AN, the ULN2004AN variant typically differs in internal resistor configurations or specific pin assignments for certain inputs. Both share the same 16-pin PDIP footprint and general high-voltage switching characteristics suitable for interfacing low-power logic with higher-power devices.
Replacement Considerations
ULN2003AN: Verify pinout compatibility as differences may exist between variants. ULN2004ADR: Surface-mount alternative requiring PCB layout changes. STMicroelectronics ULN2004A: Pin-compatible option from alternate manufacturer.
