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LM3914V

Name: LM3914V
Rating: 4.7 (12 reviews)

IC DRVR DOT/BAR DISPLAY 20PLCC

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資料表 LM3914V DataSheet
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規格

Part Status	Obsolete
Display Type	LED, LCD, Vacuum Fluorescent (VF)
Configuration	Dot/Bar Display
Digits or Characters	10 Steps
Current - Supply	6.1 mA
Voltage - Supply	3V ~ 20V
Operating Temperature	0°C ~ 70°C
Mounting Type	Surface Mount
Package / Case	20-LCC (J-Lead)
Supplier Device Package	20-PLCC (9x9)
Base Product Number	LM3914

概述

Description

The LM3914V is a voltage-level indicator integrated circuit designed to drive a 10-segment LED bar graph or 10-segment LED dot display. It is commonly used for visual representation of analog signals, such as audio levels or battery voltages.
Key features include:
1. Display Modes: It offers bar graph or dot display modes, selectable through a pin configuration.
2. Voltage Range: It can operate with an input voltage range of 1.2V to 30V, making it versatile for various applications.
3. Linear Scale: The output provides a linear representation of the input voltage, allowing for precise monitoring.
4. Simple Operation: It requires minimal external components, making it easy to implement in designs.
5. Temperature Range: Designed to work effectively within a broad temperature range, enhancing its reliability in diverse environments.
The LM3914V is widely used in audio equipment, battery chargers, and various visual monitoring applications, offering a simple yet effective solution for voltage level indication.

Features

The LM3914V is a versatile LED bar graph/LED dot display driver designed for visual signal representation. Key features include:
1. Display Modes: Operates in either bar graph or dot mode, allowing for flexible display options.
2. Input Voltage Range: Accepts input voltages from 0V to 1.2V, suitable for a variety of applications.
3. Drive Capability: Drives up to 10 LEDs in series, with a maximum current of 30 mA per LED.
4. Internal Reference: Features an internal voltage reference for consistent performance across different applications.
5. Temperature Range: Operates effectively within a temperature range of -40°C to +85°C, ensuring reliability in various environments.
6. Easy Interface: Simple to interface with microcontrollers and other circuits, facilitating design integration.
These features make the LM3914V ideal for applications such as signal level indicators, audio level meters, and other visual display needs.

Package

The LM3914V is commonly available in a 16-pin dual-in-line package (DIP) format, as well as in surface-mount options like the SOIC-16. These packages facilitate easy integration into electronic circuits for LED bar graph or LED dot display applications.

Pinout

The LM3914V is a voltage-level indicator integrated circuit that operates in dot or bar graph mode. It features a 10-pin dual in-line package (DIP).
Pin Count and Functions:
1. Pin 1 (V+): Power supply input (typically +12V to +40V).
2. Pin 2 (Signal): Input for the voltage to be monitored.
3. Pin 3 (Iref): Reference current input for setting display brightness.
4. Pin 4 (Mode): Selects between dot mode and bar mode.
5. Pin 5 (Output 1): Outputs the first LED indicator (D0).
6. Pin 6 (Output 2): Outputs the second LED indicator (D1).
7. Pin 7 (Output 3): Outputs the third LED indicator (D2).
8. Pin 8 (Output 4): Outputs the fourth LED indicator (D3).
9. Pin 9 (Output 5): Outputs the fifth LED indicator (D4).
10. Pin 10 (GND): Ground connection.
The LM3914V provides a visual representation of voltage levels, making it useful in various applications for monitoring and indication.

Manufacturer

The LM3914V is manufactured by Texas Instruments (TI), a leading global semiconductor company. Founded in 1930 and headquartered in Dallas, Texas, Texas Instruments specializes in designing and manufacturing a wide range of electronic components, including integrated circuits (ICs), analog technologies, and embedded processors. TI serves various markets such as automotive, industrial, communications, and consumer electronics. The LM3914V is specifically a LED bar graph/LED matrix display driver, used in applications where visual representation of analog signals is needed. Texas Instruments is known for its innovation and commitment to quality in the semiconductor industry.

Application

The LM3914V is a logarithmic LED bar graph/LED dot display driver commonly used in audio level meters, battery voltage indicators, and signal strength indicators. It effectively visualizes analog signals in applications requiring precise level indication, including industrial equipment, consumer electronics, and instrumentation. Its versatility allows for integration in devices where visual feedback of varying levels is crucial.

Equivalent

The LM3914V chip is a LED bar graph/LED dot display driver. Equivalent products include:
1. LM3915 - same functionality but for LCDs.
2. LM3916 - for voltage levels with a wider input range.
3. LM3917 - similar to LM3914 but with different output configurations.
Other alternatives include the MAX7219 and MAX6953, which are more integrated solutions for driving multiple LEDs or displays. Always check the specific requirements and application needs for compatibility.