NEC NL6448AC20-02 | Robust 6.5" VGA TFT LCD for Legacy Industrial Systems
The NEC NL6448AC20-02 is an industrial-grade 6.5-inch color TFT-LCD module engineered for applications demanding uncompromising reliability and long-term availability. As a cornerstone for legacy Human-Machine Interfaces (HMIs) and embedded systems, this display delivers the proven performance and optical clarity that defined NEC's reputation in the industrial sector. It is specifically designed as a form, fit, and function replacement for systems built around the VGA standard, ensuring continuity for critical manufacturing lines, medical devices, and control systems.
Key Engineering Parameters
This table provides a snapshot of the critical performance metrics for the NEC NL6448AC20-02. These specifications are tailored for deterministic performance in demanding industrial environments.
| Parameter | Specification |
|---|---|
| Screen Size | 6.5 inches (16 cm) diagonal |
| Resolution | 640(H) x 480(V) - VGA |
| Pixel Pitch | 0.207(H) x 0.207(V) mm |
| Display Technology | a-Si TFT (Amorphous Silicon) Active Matrix |
| Interface | 31-pin CMOS (Parallel RGB, 6-bit) |
| Luminance | 200 cd/m² (Typical) |
| Contrast Ratio | 300:1 (Typical) |
| Backlight System | 1x CCFL with integrated inverter |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -20°C to +60°C |
For complete electrical and mechanical specifications, you can Download the Datasheet for the closely related NL6448AC20-06 model.
Technical Deep Dive: Interface and Backlight
The NL6448AC20-02's design choices reflect a focus on stability and compatibility. Its CMOS parallel interface, while requiring a higher pin count than modern serial interfaces like LVDS, offers direct and straightforward integration with a wide range of legacy microcontrollers and graphics processors. This eliminates the need for additional serializer/deserializer components, simplifying the BOM and validation process for repair or replacement scenarios.
The use of a Cold Cathode Fluorescent Lamp (CCFL) backlight was the industry standard for high-reliability displays of its generation. CCFL technology is known for its stable color spectrum and consistent brightness over its operational life. While modern systems have largely transitioned to LED backlights, understanding the characteristics of CCFL is critical for maintaining existing equipment. This system requires an inverter to generate the high voltage needed for operation, a factor engineers must account for during system diagnostics and repair. For a comparison of backlight technologies, explore this deep dive into the energy efficiency of LED backlights.
Application Scenarios & Value Proposition
The true value of the NEC NL6448AC20-02 lies in its ability to extend the life of high-value capital equipment. Its specific feature set makes it indispensable in several key areas:
- CNC and PLC Control Panels: The 640x480 resolution is perfectly matched to the graphical requirements of many machine tool and factory automation interfaces. Its robust construction withstands the typical vibrations and temperature fluctuations of a shop floor environment.
- Medical Diagnostic Instruments: Equipment such as patient monitors and analysis machines often have long validation and certification cycles. The NL6448AC20-02 provides a reliable display component that doesn't force a costly and time-consuming system redesign.
- Test and Measurement Equipment: From oscilloscopes to spectrum analyzers, these instruments are built for longevity. This display serves as an essential service part, ensuring these critical tools remain operational for decades.
Frequently Asked Engineering Questions (FAQ)
Is the NEC NL6448AC20-02 a good choice for brand-new product designs?
For new designs, we typically recommend exploring our portfolio of industrial LCD displays featuring LED backlights and LVDS or eDP interfaces for higher efficiency, thinner profiles, and simpler connectivity. However, if your new design is an extension of an existing product line standardized on a CMOS interface, this display remains a top-tier option for its proven reliability and consistent supply chain.
What is the typical lifespan of the CCFL backlight?
CCFL backlights are typically rated for a lifetime to half-brightness, often in the range of 20,000 to 50,000 hours, depending on operating conditions. For mission-critical applications, it's advisable to factor in backlight replacement as part of the long-term maintenance schedule. When servicing a system with this display, it is often prudent to inspect or replace the high-voltage inverter along with the backlight itself.
If you are managing the lifecycle of equipment that relies on this specific display or similar legacy components, contact our technical team to discuss your requirements and explore strategies for long-term support.
