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Product Detailed Parameters
- Description：TRANS 4NPN DARL 50V 1.8A 16DIP
- Series：-
- Mfr：STMicroelectronics
- Package：Tube
- Transistor Type：4 NPN Darlington (Quad)
- Current - Collector (Ic) (Max)：1.8A
- Voltage - Collector Emitter Breakdown (Max)：50V
- Vce Saturation (Max) @ Ib, Ic：1.6V @ 1.8A
- Current - Collector Cutoff (Max)：-
- DC Current Gain (hFE) (Min) @ Ic, Vce：-
- Power - Max：1W
- Frequency - Transition：-
- Operating Temperature：-40°C ~ 150°C (TJ)
- Mounting Type：Through Hole
- Package / Case：-
- Supplier Device Package：16-PowerDIP
- Grade：-
- Qualification：-
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Overview
The L6221AS is a monolithic quad Darlington switch manufactured by STMicroelectronics in a Power DIP package. It features four non-inverting outputs with a common enable input, designed for high current and voltage switching applications. The device supports an output voltage up to 50 V and delivers a continuous collector current of 1.8 A per channel. It includes integral fast recirculation diodes for inductive loads and operates within a junction temperature range of -40°C to +150°C.
Feature Summary
- Four non-inverting inputs controlled by a single common enable signal
- TTL-compatible logic inputs for direct connection to standard logic circuits
- Integral fast recirculation diodes integrated for inductive load protection
Applications
- High current and high voltage switching applications
- Solenoid driver circuits
- Inductive load control systems
Procurement Notes
Verify the specific ordering code E-L6221AS against official documentation to confirm the Power DIP package configuration. Ensure that environmental compliance requirements match ECOPACK specifications if applicable. Confirm availability status as older revisions may indicate obsolete product codes within the same family series.
Selection Notes
Select this component when a quad Darlington array with a common enable feature is required. Verify that the 1.8 A continuous current rating and 50 V output voltage meet the load requirements. Consider thermal resistance values and PCB copper area sizing for adequate heat dissipation during operation.
Part Context
This part belongs to the L6221 family of quad Darlington switches. Other variants include the SO16+2+2 package versions (E-L6221AD) and obsolete DIP/CN types. The L6221AS specifically denotes the Power DIP package variant, offering distinct thermal characteristics compared to surface mount alternatives.
Replacement Considerations
Direct replacements must maintain the quad Darlington architecture and similar electrical ratings. Check for equivalent packages such as the SO16+2+2 version if pinout compatibility allows. Verify that any substitute meets the 1.8 A current and 50 V voltage specifications.
