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Product Detailed Parameters
- Description：IC PWR RELAY 7NPN 1:1 16SO
- 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 ~ 105°C (TA)
- Mounting Type：Surface Mount
- Package / Case：16-SOIC (0.209", 5.30mm Width)
- Supplier Device Package：16-SO
- Grade：-
- Qualification：-
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Overview
The ULN2004AINS is a high-voltage, high-current Darlington transistor array manufactured by Texas Instruments. It contains seven NPN Darlington pairs with common-cathode clamp diodes for switching inductive loads. Each channel supports a collector current of 500 mA and withstands peak currents up to 600 mA. The device features a 10.5-kΩ series base resistor per pair, enabling direct interface with TTL or 5-V CMOS logic. It operates within an ambient temperature range of -40°C to 105°C and is housed in a 16-pin Small Outline Package (SOP).
Feature Summary
- Integrated suppression diodes for driving inductive loads.
- Inputs compatible with various logic families including TTL and CMOS.
- Input pins placed opposite output pins to simplify board layout.
Applications
- Relay drivers
- Hammer drivers
- Lamp drivers
- Display drivers (LED and gas discharge)
- Line drivers and logic buffers
Procurement Notes
Verify the exact ordering suffix against the manufacturer's latest documentation to confirm package type and material specifications. Ensure the component status is active before finalizing procurement plans. Cross-reference the datasheet revision date to validate all electrical characteristics and absolute maximum ratings.
Selection Notes
Select this component when interfacing 5-V CMOS or TTL logic with high-voltage loads requiring up to 50 V and 500 mA per channel. The integrated 10.5-kΩ base resistors eliminate the need for external current-limiting components. Consider thermal management requirements if paralleling multiple channels for higher current capacity.
Part Context
This part belongs to the ULx200xA family of high-voltage Darlington arrays. While other variants like ULN2003A target 5-V TTL directly, the ULN2004A variant includes specific base resistors optimized for 6-V to 15-V CMOS operation. The 'AINS' designation indicates the SOP surface-mount package variant.
Replacement Considerations
ULN2004AIN (PDIP package), ULN2004AID (SOIC package), ULN2004AIDR (SOIC tape-and-reel). Verify pinout compatibility and thermal resistance differences between packages.
FAQ
What is the function of the internal base resistors?
Each Darlington pair has a 10.5-kΩ series base resistor, allowing the device to operate directly from logic outputs without external current-limiting resistors.
Can the outputs be used for higher current applications?
Yes, the Darlington pairs can be paralleled to achieve higher current capability beyond the single-channel 500 mA rating.
How does the device handle inductive load flyback?
Common-cathode clamp diodes are included internally to suppress voltage spikes generated by inductive loads during switching.
