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Product Detailed Parameters
- Description：TRANS 7NPN DARL 50V 0.5A 16SOIC
- Series：ULx200xA
- Mfr：Texas Instruments
- Package：Tape & Reel (TR),Cut Tape (CT)
- 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 ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.154", 3.90mm Width)
- Supplier Device Package：16-SOIC
- Grade：-
- Qualification：-
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Overview
The ULN2004AIDR is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It consists of seven NPN Darlington pairs with common emitters and integrated clamp diodes for switching inductive loads. Each channel supports a collector current of 500 mA and withstands up to 50 V. The device features a 10.5-kΩ series base resistor per pair, enabling direct interface with TTL or 5-V CMOS logic. Packaged in a 16-pin SOIC (D) format, it operates within a temperature range of -40°C to 105°C.
Feature Summary
- Seven independent NPN Darlington pairs with common-emitter configuration
- Integrated common-cathode clamp diodes for inductive load protection
- 10.5-kΩ series base resistors for direct TTL and 5-V CMOS compatibility
- Outputs capable of paralleling for increased current handling
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers and logic buffers
Procurement Notes
Verify the active status and RoHS compliance through official Texas Instruments documentation before procurement. Confirm that the SOIC-16 package dimensions and thermal characteristics align with the target PCB layout requirements. Ensure the operating temperature range meets the specific environmental conditions of the intended application.
Selection Notes
Select this component when driving inductive loads such as relays or solenoids directly from low-voltage logic sources. The internal base resistors simplify circuit design by eliminating external components. Consider parallel connection of outputs if higher single-channel current capacity than 500 mA is required.
Part Context
This part belongs to the ULx200xA family of high-voltage Darlington arrays. While other variants like ULN2003A are optimized for 5-V TTL/CMOS and ULN2002A for PMOS, the ULN2004A variant specifically targets applications requiring operation with 6-V to 15-V CMOS or PMOS devices due to its unique base resistance values.
Replacement Considerations
ULN2004AID: Identical electrical specifications and functionality; differs only in tube packaging instead of tape-and-reel.
FAQ
What is the function of the integrated clamp diodes?
The common-cathode clamp diodes protect the Darlington transistors from voltage spikes generated by inductive loads during switching.
How does the ULN2004A differ from the ULN2003A regarding logic compatibility?
The ULN2004A includes a 10.5-kΩ base resistor suitable for 6-V to 15-V CMOS/PMOS, whereas the ULN2003A uses a 2.7-kΩ resistor designed for 5-V TTL/CMOS.
Can multiple channels be used simultaneously?
Yes, the device contains seven independent channels that can operate concurrently or be paralleled to increase total current capability.
