LM3914 Dot/Bar Display Driver IC
- Operating voltage range: +4.75 to +5.25V
- Recommended operating voltage: +5V
- Maximum supply voltage:7V
- Maximum current allowed to draw through each gate output: 8mA
- TTL outputs
- Low power consumption
- Typical Rise Time: 18ns
- Typical Fall Time: 18ns
- Operating temperature:0°C to 70°C
- Storage Temperature: -65°C to 150°C
Out of stock
₨ 75
Out of stock
The LM3914 is an analog controlled LED driver IC, meaning it can control (turn on or off) 10 LED lights based on an analog input voltage. This IC eliminates the need for microcontroller and programming and also reduces the hardware required to control 10 LEDs.
The analog input voltage can vary from 3V to 18V and the LED current can be limited by simply using a single resistor on pin 7 (Ref Out). The IC also has two operating modes DOT mode and BAR mode, also more than one IC can be cascaded to control upto 100 LEDs. Since the LEDs can be controlled without any flickering and flawlessly with equal brightness these IC’s are commonly used in visual alarms and other metering/monitoring applications. So, if you are looking for an IC to driver your bar LED lights or other sequence of 10 LED then this IC might be of interest to you.
LM3914 Pin Configuration
| Pin Number | Pin Name | Description |
| 1 and 10 to 18 | LED1, LED2, LED3…..LED10 | The 10 LEDs which has to be controlled is connected to these pins |
| 2 | V- / Ground | Ground pin of the IC |
| 3 | V+ / Vcc | Supply Voltage (3-18)V |
| 4 | RLO | Low level voltage for potential divider |
| 5 | Signal | Analog signal Input pin based on which the LED is controlled. |
| 6 | RHI | High Level voltage for potential divider |
| 7 | REF OUT | Output Reference Voltage for LED current limiting |
| 8 | REF ADJ | Adjust pin for voltage reference |
| 9 | Mode | Select between Dot/Bar Mode |
Specifications
- Analog Controlled LED Driver IC
- Number of controllable LEDs: 10
- Operating Voltage: 3V to 18V
- Input Analog voltage range: 1.2V to 12V
- LED sink current: 2mA to 30mA (programmable)
- Both Dot/Bar mode available
- Can be cascaded to control upto 100 LEDs
- Available in 18-pin DIP, PLCC package
Applications
- Crude Battery level indicators
- Low cost monitor devices
- Digital gauges
- Electronic displays
- Fade bars
