LM3915 LED Dot/Bar Display Driver IC

Product Details

  • Product: LED Bar / Dot Matrix Display Driver IC
  • IC number: LM3915
  • Number of pins: 18
  • Package type: PDIP-18
  • Mounting type: through hole
  • Package contains: 1 x LM3915 LED Dot / Bar Display Driver IC

69.00 (ex. GST)

LM3915 is a monolithic integrated circuit that drives a 10 segment LED bar and dot matrix. It is commonly used to visualize audio signals. It provides a logarithmic 3 dB/step analog display. One pin changes the display from a bar graph to a moving dot display. LED current drive is regulated and programmable, eliminating the need for current limiting resistors. The whole display system can operate from a single power supply as low as 3V or as high as 25V.


  • 3 dB/step, 30 dB range
  • Drives LEDs, LCDs, or vacuum fluorescents
  • Bar or dot display mode externally selectable by the user
  • Expandable to displays of 90dB
  • Internal voltage reference from 1.2V to 12V
  • Operates with a single supply of 3V to 25V
  • Inputs operate down to the ground
  • Output current programmable from 1 mA to 30 mA
  • Input withstands ±35V without damage or false outputs
  • Outputs are current regulated, open collectors
  • Directly drives TTL or CMOS
  • The internal 10-steps divider is floating and be referenced to a wide range of voltages


  • Maximum supply voltage: 25V
  • Voltage on output drivers: 25V
  • Input signal over-voltage: ±35V
  • Divider voltage: -100mV to V+
  • Reference load current: 10 mA
  • Power dissipation: 1365 mW
  • Storage temperature range: -55℃ to +150℃


  • Audio visualization circuit
  • Crude battery level indicator
  • Fade bars
SKU: 577 Category: Tags: , ,

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