IC LM3916, LM3915, and LM3914 Pinout Diagram, Specification

IC LM3916, LM3915, and LM3914 are LED Driver ICs. They are mainly used to drive the dot or bar displays. IC LM3914 was founded by National Semiconductor in 1980. It can drive up to 10 LEDs. It has a total of 18 pins. In fact, all these ICs have the same pin numbers with the same identifications. 10 pins among these pins are for the connection of LEDs and others are to control the IC. These are the DIP or Dual-in-line Package ICs. All of these ICs have the same specifications such as operating voltage, current, and other parameters.

IC LM3916 Pinout Diagram and Specification

LM3916 Pin Configuration

Pin No.1 - Output 1 for Connecting LED 1

Pin No.2 - Negative for Input Voltage

Pin No.3 - Positive For Input Voltage

Pin No.4 - Low-End Divider

Pin No.5- Input Signal

Pin No.6 - High-End Divider

Pin No.7 - Reference Output

Pin No.8 - Reference Adjust

Pin No.9 - Mode select for output display dot or bar

Pin No.10 - Output 10 for Connecting LED 10

Pin No.11 - Output 9 for Connecting LED 9

Pin No.12 - Output 8 for Connecting LED 8

Pin No.13 - Output 7 for Connecting LED 7

Pin No.14 - Output 6 for Connecting LED 6

Pin No.15 - Output 5 for Connecting LED 5

Pin No.16 - Output 4 for Connecting LED 4

Pin No.17 - Output 3 for Connecting LED 3

Pin No.18 - Output 2 for Connecting LED 2

LM3916 Specification

• Input Voltage up to 35V
• Output current programmable from 1mA to 30mA
• It can operate at 0 degrees to 70 degrees centigrade temperature.
• Internal Voltage Reference from 1.2V to 12V
• It can operate with a single supply of 3V to 25V
• It can deliver a reference load current 10mA
• Output Driving Voltage 5V for LED.
• It disipate power up to 1365mW

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IC LM3915 Pinout Diagram and Specification

LM3915 Pin Configuration

Pin No.1 - Output 1 for Connecting LED 1

Pin No.2 - Negative for Input Voltage

Pin No.3 - Positive For Input Voltage

Pin No.4 - Low-End Divider

Pin No.5- Input Signal

Pin No.6 - High-End Divider

Pin No.7 - Reference Output

Pin No.8 - Reference Adjust

Pin No.9 - Mode select for output display dot or bar

Pin No.10 - Output 10 for Connecting LED 10

Pin No.11 - Output 9 for Connecting LED 9

Pin No.12 - Output 8 for Connecting LED 8

Pin No.13 - Output 7 for Connecting LED 7

Pin No.14 - Output 6 for Connecting LED 6

Pin No.15 - Output 5 for Connecting LED 5

Pin No.16 - Output 4 for Connecting LED 4

Pin No.17 - Output 3 for Connecting LED 3

Pin No.18 - Output 2 for Connecting LED 2

LM3915 Specification

• Input Voltage up to 35V
• Output current programmable from 1mA to 30mA
• It can operate at 0 degrees to 70 degrees centigrade temperature.
• Internal Voltage Reference from 1.2V to 12V
• It can operate with a single supply of 3V to 25V
• It can deliver a reference load current 10mA
• Output Driving Voltage 5V for LED.
• It disipate power up to 1365mW

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IC LM3914 Pinout Diagram and Specification

LM3914 Pin Configuration

Pin No.1 - Output 1 for Connecting LED 1

Pin No.2 - Negative for Input Voltage

Pin No.3 - Positive For Input Voltage

Pin No.4 - Low-End Divider

Pin No.5- Input Signal

Pin No.6 - High-End Divider

Pin No.7 - Reference Output

Pin No.8 - Reference Adjust

Pin No.9 - Mode select for output display dot or bar

Pin No.10 - Output 10 for Connecting LED 10

Pin No.11 - Output 9 for Connecting LED 9

Pin No.12 - Output 8 for Connecting LED 8

Pin No.13 - Output 7 for Connecting LED 7

Pin No.14 - Output 6 for Connecting LED 6

Pin No.15 - Output 5 for Connecting LED 5

Pin No.16 - Output 4 for Connecting LED 4

Pin No.17 - Output 3 for Connecting LED 3

Pin No.18 - Output 2 for Connecting LED 2

LM3914 Specification

• Input Voltage up to 35V
• Output current programmable from 1mA to 30mA
• It can operate at 0 degrees to 70 degrees centigrade temperature.
• Internal Voltage Reference from 1.2V to 12V
• It can operate with a single supply of 3V to 25V
• It can deliver a reference load current 10mA
• Output Driving Voltage 5V for LED.
• It disipate power up to 1365mW

Difference between IC LM3916, LM3915, and LM 3914

We know that these ICs are built with comparators that are connected to ten internal resistors as a voltage divider. The main difference between these ICs is the value of ten internal resistors.

The IC LM3914 has all ten resistors of 1000 ohms.

The IC LM3915 has internal resistors with the values of 6630, 4690, 3310, 2340, 1660, 1170, 830, 590, 410, and 1000 ohm

The IC LM3916 has internal resistors with the values of 1087, 970, 864, 769, 1298, 1031, 819, 923, 1531, and 708 ohm

Otherwise all the specifications including input voltage, output voltage, and current are the same for all three ICs.

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