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LM3914VX from NS,National Semiconductor

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LM3914VX

Manufacturer: NS

Dot/Bar Display Driver

Partnumber Manufacturer Quantity Availability
LM3914VX NS 77 In Stock

Description and Introduction

Dot/Bar Display Driver The LM3914VX is a monolithic integrated circuit manufactured by National Semiconductor (NS). It is designed to sense analog voltage levels and drive a 10-LED display in dot or bar mode.  

### **Specifications:**  
- **Supply Voltage Range:** 3V to 25V  
- **Output Current:** 30mA per LED (adjustable)  
- **Reference Voltage:** Adjustable (1.2V to 12V)  
- **Input Impedance:** High (typically 30MΩ)  
- **Operating Temperature Range:** 0°C to +70°C  
- **Package Type:** 18-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**  
- The LM3914VX is a **linear LED driver** that provides logarithmic (3dB/step) scaling, making it suitable for audio level meters and other applications requiring a non-linear display.  
- It includes an internal voltage reference, adjustable gain, and a mode selector for **dot or bar display**.  
- The device eliminates the need for external resistors for each LED, simplifying circuit design.  

### **Features:**  
- **10 comparators with precision reference**  
- **Bar or dot display mode selectable**  
- **Drives LEDs, LCDs, or vacuum fluorescents**  
- **Internally regulated reference voltage**  
- **Wide supply voltage range (3V–25V)**  
- **Low standby current (6mA typical)**  
- **Directly interfaces with TTL or CMOS logic**  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Dot/Bar Display Driver

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