LTST-C191TGKT Lite-On LED (LED Moulded) In Stock
Lite-On LTST-C191TGKT is a single green SMD LED in a compact plastic 0402-style moulded package, emitting blue-green light with a 3.6 V maximum forward voltage and 20 mA maximum forward current. IC-compatible drive levels allow direct GPIO connection without a buffer, making it well suited for status indicators on microcontroller boards. Available RoHS-compliant with JEDEC e3 moisture classification for lead-free SMT assembly.
- Manufacturer
- Lite-On
- Package
- LED Moulded
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- LTST-C191TGKT Datasheet PDF
- Category
- LED
- Temp Range
- -20.0°C to 80.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Green (blue-green wavelength) single LED with 3.6 V max forward voltage and 20 mA max forward current for direct IC GPIO-level drive
- IC-compatible design enabling direct connection to 3.3 V and 5 V microcontroller output pins without additional buffer circuitry
- Compact moulded SMD package optimized for high-density status indicator placement on PCBs with standard reflow soldering
- RoHS-compliant, JEDEC e3 moisture-rated with Pb-free construction for lead-free SMT production compatibility
Applications
The Lite-On LTST-C191TGKT green SMD LED is used as a status indicator on microcontroller development boards, consumer electronics panels, and industrial HMI interfaces where a small footprint, low forward voltage, and IC-compatible drive are required. Its 20 mA maximum forward current and direct GPIO driveability make it a go-to choice for power-on, link, and activity indicators in networking equipment, wearables, and embedded systems. The moulded package suits high-volume automated SMT assembly on compact PCBs where through-hole LEDs would consume excessive board space.
Specifications
| Pbfree Code | Yes |
| Factory Lead Time | 16Weeks |
| YTEOL | 7 |
| Additional Feature | IC COMPATIBLE |
| Color | GREEN |
| Color@Wavelength | Blue-Green |
| Configuration | SINGLE |
| Forward Current-Max | 0.02A |
| Forward Voltage-Max | 3.6V |
| JESD-609 Code | e3 |
| Lens Type | WATER CLEAR |
| Luminous Intensity-Min | 130cd |
| Luminous Intensity-Nom | 260.5mcd |
| Mounting Feature | SURFACE MOUNT |
| Number of Functions | 1 |
| Optoelectronic Device Type | SINGLE COLOR LED |
| Overall Height | 0.55mm |
| Packing Method | TR, 7 INCH |
| Peak Wavelength | 530nm |
| Reverse Voltage-Max | 5V |
| Shape | RECTANGULAR |
| Size | 1.1mm |
| Surface Mount | YES |
| Terminal Finish | Pure Tin (Sn) |
| Terminal Pitch | 1.5mm |
| Viewing Angle | 130deg |
| Package | LED Moulded |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8541.40.20.00 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for LTST-C191TGKT:
suggested
suggested
Frequently Asked Questions
Can the LTST-C191TGKT be driven directly from a 3.3 V microcontroller GPIO pin without a transistor buffer?
Yes, the LTST-C191TGKT is IC-compatible, meaning its 20 mA maximum forward current and 3.6 V maximum forward voltage allow direct connection to 3.3 V GPIO output pins through a current-limiting resistor. A 68 ohm to 100 ohm series resistor limits current to approximately 5-10 mA, producing visible green illumination without exceeding the GPIO source current limit typical of most ARM Cortex-M and AVR microcontrollers rated at 8-16 mA per pin.
At what forward current does the LTST-C191TGKT produce its rated luminous intensity and how does dimming affect it?
The LTST-C191TGKT produces rated luminous intensity at its specified forward current up to 20 mA maximum. Pulse-width modulation (PWM) dimming at frequencies above 100 Hz with duty cycles from 5% to 100% effectively reduces perceived brightness without color shift, since blue-green LEDs maintain consistent chromaticity across a wide current range from 1 mA to 20 mA. This makes it suitable for PWM-dimmed indicators in battery-powered devices needing adjustable brightness control.
What SMD package size does the LTST-C191TGKT use and how does it compare to through-hole LED alternatives for board space?
The LTST-C191TGKT uses a compact moulded SMD package suitable for standard pick-and-place assembly, occupying significantly less PCB area than a standard 3 mm or 5 mm through-hole LED which requires a 1.0 mm to 1.5 mm hole and at least 2.54 mm lead pitch. The SMD format eliminates drilling costs and allows placement on either side of the PCB, enabling higher component density on boards where indicators must be positioned adjacent to the ICs they monitor at 3.3 V or 5 V logic levels.
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