LM3914N-1/NOPB
Category: PMIC - Display Drivers
Description: LM3914 Dot/Bar Display Driver
Package: MDIP
No of Pins: 18
Qty per Container: 20/Rail
Price range ($)
0.31691 0.83820
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LM3914N-1/NOPB
LM3914N-1/NOPB has several brands around the world that may have alternate names for LM3914N-1/NOPB due to regional differences or acquisition. LM3914N-1/NOPB may also be known as the following names:
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Brand new
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Certified preowned
2
Official
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2
Description
LM3914N-1/NOPB
Stock:9999 |
National Semiconductor |
LM3914 Dot/Bar Display Driver; Package: MDIP; No of Pins: 18; Qty per Container: 20/Rail |
≥1: US $0.81026 US $0.72923 ≥5: US $0.60770 US $0.54693 ≥10: US $0.42539 US $0.38285 ≥20: US $0.40513 US $0.36462 ≥50: US $0.36462 US $0.32816 ≥100: US $0.35449 US $0.31904 ≥200: US $0.34436 US $0.30992 ≥500: US $0.33423 US $0.30081 ≥1000: US $0.32410 US $0.29169
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Inquiry
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LM3914N-1/NOPB
Stock:10000 |
Texas Instruments 18 |
LM3914 Dot/Bar Display Driver |
≥1: US $0.79228 US $0.71305 ≥5: US $0.59421 US $0.53479 ≥10: US $0.41595 US $0.37435 ≥20: US $0.39614 US $0.35653 ≥50: US $0.35653 US $0.32088 ≥100: US $0.34662 US $0.31196 ≥200: US $0.33672 US $0.30305 ≥500: US $0.32682 US $0.29414 ≥1000: US $0.31691 US $0.28522
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Inquiry
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LM3914N-1/NOPB
Stock:37995 |
Ti(德州仪器) |
LM3914 Dot/Bar Display Driver |
≥1: US $0.83820 US $0.75438 ≥5: US $0.62865 US $0.56579 ≥10: US $0.44006 US $0.39605 ≥20: US $0.41910 US $0.37719 ≥50: US $0.37719 US $0.33947 ≥100: US $0.36671 US $0.33004 ≥200: US $0.35624 US $0.32061 ≥500: US $0.34576 US $0.31118 ≥1000: US $0.33528 US $0.30175
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Inquiry
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FEATURES
● Drives LEDs, LCDs or Vacuum Fluorescents
● Bar or Dot Display Mode Externally Selectable by User
● Expandable to Displays of 100 steps
● Internal Voltage Reference from 1.2V to 12V
● Operates with Single Supply of Less than 3V.
● Inputs Operate Down to Ground
● Output Current Programmable from 2 mA to 30mA
● No Multiplex Switching or Interaction Between outputs
● Input Withstands ±35V without Damage or False outputs
● LED Driver outputs are Current Regulated, open-collectors
● Outputs can Interface with TTL or CMOS Logic
● The Internal 10-step Divider is Floating and can be Referenced to a Wide Range of Voltages
DESCRIPTION
The LM3914 is a monolithic integrated circuit that senses analog voltage levels and drives 10 LEDs, providing a linear analog display. A single pin changes the display from a moving dot to a bar graph. Current drive to the LEDs is regulated and programmable, eliminating the need for resistors.This feature is one that allows operation of the whole system from less than 3V.
The circuit contains its own adjustable reference and accurate 10-step voltage divider. The low-bias-current input buffer accepts signals down to ground, or V-, yet needs no protection against inputs of 35V above or below ground. The buffer drives 10 individual comparators referenced to the precision divider. Indication non-linearity can thus be held typically to 1/2%, even over a wide temperature range.
Versatility was designed into the LM3914 so that controller, visual alarm, and expanded scale functions are easily added on to the disp1ay system. The circuit can drive LEDs of many co1ors, or low-current Incandescent lamps. Many LM3914s can be “chained" to form displays of 20 to over 100 segments. Both ends of the voltage divider are externally available so that 2 drivers can be made into a zero-center meter.
The LM3914 is very easy to apply as an analog meter circuit.A 1.2v full-sca1e meter requires only 1resistor and a single 3V to 15V supply in addition to the 10 disp1ay LEDs. If the 1 resistor is a pot, it becomes the LED brightness control. The simplified block diagram illustrates this extremely simple external circuitry.
When in the dot mode, there is a small amount of over1ap or “fade” (about 1mV) between segments. This assures that at no time will all LEDs be“OFF”, and thus any ambiguous display is avoided. Various novel displays are possible.
Much of the display flexibility derives from the fact that all outputs are individual, DC regulated currents. Various effects can be achieved by modulating these currents. The individual outputs can drive a transistor as well as a LED at the same time, so controller functions including “staging” control can be performed. The LM3914 can also act as a programmer, or sequencer.
The LM3914 is rated for operation from 0℃ to +70℃. The LM3914N-1 is available in an 18-lead PDIP (NFK) package.
The following typical application illustrates adjusting of the reference to a desired value, and proper
Grounding for accurate operation, and avoiding oscillations.
E-catalog
Freight calculation
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