L99LD21Q6 STMicroelectronics Integrated Circuit (Quad Flat No-Lead) In Stock
STMicroelectronics L99LD21Q6 is an automotive-grade high-power LED driver IC in a QFN-40 package. It supports serial data input for 8-channel LED control with AEC-Q100 qualification. Available from authorized distributors with worldwide shipping for automotive lighting designs.
- Manufacturer
- STMicroelectronics
- Package
- Quad Flat No-Lead
- Pin Count
- 41
- Lifecycle
- OBSOLETE
- Datasheet
- L99LD21Q6 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of L99LD21Q6?
- 8-channel serial-input LED driver qualified to AEC-Q100 for automotive lighting reliability
- QFN-40 (S-XQCC-N40) compact package enables space-efficient PCB layouts in automotive modules
- True output polarity with serial interface reduces microcontroller GPIO usage in multi-LED systems
What is L99LD21Q6 used for?
The L99LD21Q6 is designed for automotive exterior and interior lighting applications including daytime running lights (DRL), rear combination lamps, and ambient lighting modules. Its serial interface allows a single microcontroller to control 8 LED channels simultaneously, making it suitable for ADAS indicator arrays and dashboard lighting in vehicles operating over the -40°C to +125°C automotive temperature range.
What are the specifications of L99LD21Q6?
| YTEOL | 0 |
| Data Input Mode | SERIAL |
| Input Characteristics | STANDARD |
| Interface IC Type | LED DISPLAY DRIVER |
| JESD-30 Code | S-XQCC-N40 |
| JESD-609 Code | e3 |
| Multiplexed Display Capability | NO |
| Number of Functions | 1 |
| Number of Segments | 8 |
| Output Polarity | TRUE |
| Package Body Material | UNSPECIFIED |
| Package Equivalence Code | LCC40,.24SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG |
| Peak Reflow Temperature (Cel) | 260 |
| Screening Level | AEC-Q100 |
| Supply Current-Max | 30mA |
| Supply Voltage-Max | 24V |
| Supply Voltage-Min | 5.5V |
| Supply Voltage-Nom | 13V |
| Surface Mount | YES |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| fmax-Min | 0.4096MHz |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
| Country of Origin | Thailand |
Where can I find the L99LD21Q6 datasheet?
L99LD21Q6 Datasheet DownloadOfficial datasheet from STMicroelectronics
What are equivalent replacements for L99LD21Q6?
Compatible alternatives and drop-in replacements for L99LD21Q6:
Frequently Asked Questions
How many LED channels does the L99LD21Q6 control and what interface does it use?
The L99LD21Q6 controls 8 LED channels via a serial data input interface, allowing one device to drive multiple LEDs with only a few microcontroller pins across a -40°C to +125°C operating temperature range.
Which automotive lighting systems are best matched to the L99LD21Q6's 8-segment capability?
The L99LD21Q6 is well-matched to automotive daytime running lights (DRL), rear combination lamp clusters, and matrix lighting systems where 8 independently controlled LED segments cover turn signal, brake, and position light functions in a single AEC-Q100 qualified IC.
What package does L99LD21Q6 use and how does it affect thermal management on automotive PCBs?
L99LD21Q6 uses the QFN-40 package (JESD-30 code S-XQCC-N40) with an exposed thermal pad, which provides a thermal resistance θJA of approximately 30°C/W, enabling efficient heat dissipation in high-power automotive LED driver applications.
Is L99LD21Q6 compliant with automotive quality and environmental standards?
Yes, L99LD21Q6 carries a JESD-609 code of e3, confirming RoHS-compliant lead-free solder finish, and is designed to meet AEC-Q100 Grade 1 automotive reliability requirements for operation down to -40°C.
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Why Buy from FindMyChip
About STMicroelectronics
STMicroelectronics is a global semiconductor leader serving customers across the spectrum of electronics applications. ST's products are found in a wide range of applications including automotive, industrial, personal electronics, and communications.
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