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LM3915 - Dot/Bar Display Driver

Download the LM3915 datasheet PDF. This datasheet also covers the LM3 variant, as both devices belong to the same dot/bar display driver family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing a logarithmic 3 dB/step analog display.

One pin changes the display from a bar graph to a moving dot display.

Key Features

  • n n n n n n n n n n n n 3 dB/step, 30 dB range Drives LEDs, LCDs, or vacuum fluorescents Bar or dot display mode externally selectable by user Expandable to displays of 90 dB Internal voltage reference from 1.2V to 12V Operates with single supply of 3V to 25V Inputs operate down to 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-step divider is f.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3-915.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM3915 Dot/Bar Display Driver Texas Instruments
LM3915N Dot/Bar Display Driver Texas Instruments
LM39100 1A Low-Voltage Low-Dropout Regulator HTC
LM39101 1A Low-Voltage Low-Dropout Regulator HTC
LM39102 1A LOW-VOLTAGE LOW-DROPOUT REGULATOR UTC

Other Datasheets by National Semiconductor (now Texas Instruments)

Part Number Description
LM3915N Dot/Bar Display Driver
LM391 Audio Power Driver
LM3911 Temperature Controller
LM3914 Dot/Bar Display Driver
LM3916 Dot/Bar Display Driver

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
LM3915 Dot/Bar Display Driver January 2000 LM3915 Dot/Bar Display Driver General Description The LM3915 is a monolithic integrated circuit that senses analog voltage levels and drives ten LEDs, LCDs or vacuum fluorescent displays, providing 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 supply as low as 3V or as high as 25V. The IC contains an adjustable voltage reference and an accurate ten-step voltage divider. The high-impedance input buffer accepts signals down to ground and up to within 1.5V of the positive supply. Further, it needs no protection against inputs of ± 35V.