| PartNumber | L6521 | L6520TR | L6520 |
| Description | Display Drivers & Controllers LV Smart Ballast CTR Half Bridge BJT FET | Display Drivers & Controllers Ballast Controller BJT and Mosfet 1.5 s | IC BALLAST CTRL TL/CFL 8-SOIC |
| Manufacturer | STMicroelectronics | STMicroelectronics | - |
| Product Category | IC Chips | PMIC - Lighting, Ballast Controllers | - |
| Series | L6521 | L6520 | - |
| Product | Controller | Driver | - |
| Type | CFL/TL Controller | CFL/TL Controller | - |
| Packaging | Tube | Digi-ReelR Alternate Packaging | - |
| Unit Weight | 0.017870 oz | 0.017870 oz | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package Case | SO-8 | SO-8 | - |
| Frequency | 46kHz ~ 47.2kHz | 46kHz ~ 47.2kHz | - |
| Operating Temperature | -25°C ~ 85°C | -25°C ~ 85°C | - |
| Mounting Type | Surface Mount | Surface Mount | - |
| Voltage Supply | 10.5 V ~ 18.5 V | 10.5 V ~ 18.5 V | - |
| Current Supply | 8mA | 8mA | - |
| Current Output Source Sink | - | - | - |
| Dimming | No | No | - |
| Maximum Operating Temperature | + 150 C | - | - |
| Operating Supply Voltage | 10.5 V to 18.5 V | 10.5 V | - |
| Operating Supply Current | - | 8 mA | - |