LM3914VX

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LM3914VX

IC DRVR DOT/BAR DISPLAY 20PLCC

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  • 製造商。 部分 #LM3914VX
  • 包 20-LCC(J-Lead)
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規格

Package Tape & Reel (TR),Bulk
ProductStatus Obsolete
DisplayType LED, LCD, Vacuum Fluorescent (VF)
Configuration Dot/Bar Display
DigitsorCharacters 10 Steps
Current-Supply 6.1 mA
Voltage-Supply 3V ~ 20V
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 20-LCC (J-Lead)

概述

Description

LM3914VX is a 10-channel LED display driver that converts an analog input into a linear LED bar/dot display. Key points:
- 10 current-sinking outputs: drive LEDs directly from V+ with outputs sinking to ground.
- Mode: DOT or BAR selectable via MODE pin (DOT lights only the active LED; BAR lights all LEDs up to the active level).
- LED current set by a single external resistor (RSET).
- Wide supply range (typically 3–25 V) and an internal 1.25 V reference with a 10-step ladder for evenly spaced thresholds.
- No per-LED resistors required in standard use; LEDs connect from V+ to the outputs.
- Common applications: VU meters, audio level indicators, battery/level indicators.
VX denotes a specific variant/packaging of the LM3914 family; check the datasheet for exact pinout, current range, and temperature specs for your package.

Features

Key features of the LM3914VX:
- 10 LED current-sink outputs for a bar-graph or dot-display
- External resistor (RSET) sets the LED current (I_LED) over a wide range; typically 1 mA up to ~20 mA per LED
- BAR or DOT mode selectable via MODE input
- Internal 1.25 V reference with 10 equal-spaced thresholds (ladder) for linear level indication
- SIG input converts an analog signal into the 0–10 LED levels
- Wide supply voltage range: 3 V to 25 V
- LEDs are connected to V+, outputs sink current to ground
- Requires only a few external components to scale brightness and range
- Available in common 18-pin packages (DIP/SOIC variants such as LM3914VX)
These points summarize its ability to drive a ten-segment LED display directly from a single analog input with adjustable brightness and display mode.

Package

LM3914VX comes in an 18-pin DIP (DIP-18) package.

Pinout

- Pin count: 18 pins (DIP-18 / SO-18 package, LM3914VX).
- Function: A 10-segment LED display driver. It provides ten current-sinking outputs (OUT1–OUT10) to drive LEDs, with LED current set by an external resistor. It compares an analog input (SIG) to a 10-step reference ladder and can operate in BAR or DOT mode (mode pin). Used for VU meters, level indicators, etc.

Manufacturer

Manufacturer: Texas Instruments (TI).
About the company: TI is a multinational semiconductor company that designs and manufactures analog, digital, and mixed-signal integrated circuits, including LED display drivers like the LM3914.

Application

LM3914VX is a 10-segment LED display driver (dot or bar mode). Common applications:
- Audio level meters (VU meters) in mixers, amplifiers, recorders
- DC voltage or battery level indicators in instruments and handhelds
- Process/sensor monitoring (temp, light, pressure) with proper scaling
- Panel indicators for status, fault, or warnings in embedded systems
- General visual level indicators in instrumentation and test equipment

Equivalent

LM3914VX is a variant of the LM3914 10-segment LED driver. Equivalents in the same family include LM3914, LM3915, and LM3916 (same pinout/function; pick based on desired features such as dot/bar mode and internal reference).

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