Manufacturer Part Number
LM3914V
Manufacturer
Texas Instruments
Introduction
The LM3914V is a monolithic integrated circuit that visually displays analog signal levels in LED, LCD, or VF display types.
Product Features and Performance
Visual level indicator
Drives LEDs, LCDs, or vacuum fluorescents
Bar or dot display mode externally selectable by the user
Expandable to displays of 100 steps
Internal voltage reference from 1.2V to 12V
Operates with single supply of 3V to 20V
Inputs operate down to ground
Output current programmable from 1 μA to 30 mA
No multiplex switching or interaction between outputs
Input withstands ±35V without damage or false outputs
LED driver outputs are current regulated, open-collectors
Product Advantages
Directly drives displays with a common anode
Simplified design, no need for multiplexing
Robust input withstands high voltage
Key Technical Parameters
Display type compatibility: LED, LCD, Vacuum Fluorescent
Configuration: Dot/Bar Display
Supply current: 6.1 mA
Supply voltage range: 3V to 20V
Operating temperature range: 0°C to 70°C
Mounting type: Surface Mount
Package: 20-LCC (J-Lead)
Device package: 20-PLCC (9x9)
Steps displayed: 10
Quality and Safety Features
Outputs are current regulated and open-collectors for safety
Input can withstand high voltages
Compatibility
Compatible with multiple display types (LED, LCD, VF)
Supports a wide voltage range for versatile application
Application Areas
Audio equipment level indicators
Battery chargers
Fluid levels indicator for tanks
VU meters
Power meters
Product Lifecycle
Product status is Obsolete
Potential need to look for alternative solutions or consult manufacturer for replacement or upgrade options
Several Key Reasons to Choose This Product
Integrated visual level indicator simplifies design
Versatile power supply compatibility from 3V to 20V
Direct driving of displays reduces additional component requirement
User-selectable display mode offers customization
Expansion capability for up to 100 steps for larger scale applications
Current regulation of outputs ensures consistent performance
LM391N-80NS