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XR-2278 - Dot and Bar Graph Display Generators

Download the XR-2278 datasheet PDF. This datasheet also covers the XR-2277 variant, as both devices belong to the same dot and bar graph display generators family and are provided as variant models within a single manufacturer datasheet.

Description

The XR-2277 and XR-2278 are 12 point level detector circuits designed for direct interfacing to light emitting diode (LED) moving-dot or bar-graph displays.

Features

  • High Impedance Buffered Input Direct LED Interface Constant Current Outputs External Dot/Bar Mode Select.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (XR-2277-Exar.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
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XR-2208 OPERATIONAL MULTIPLIER Exar Corporation
XR-2209 Voltage-Controlled Oscillator Exar Corporation
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Other Datasheets by Exar (now MaxLinear)

Part Number Description
XR-2271 Fluorescent Display Driver
XR-2272 High-Voltage 7-Digit Display Driver
XR-2276 Bar Graph Display Generator
XR-2277 Dot and Bar Graph Display Generators
XR-2279 Dot and Bar-Graph Display Generators

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
XR·2277/2278 Dot and Bar Graph Display Generators GENERAL DESCRIPTION FUNCTIONAL BLOCK DIAGRAM The XR-2277 and XR-2278 are 12 point level detector circuits designed for direct interfacing to light emitting diode (LED) moving-dot or bar-graph displays. Each of the circuits is comprised of an input buffer amplifier and 12 comparators, biased from a resistor string at logarithmic intervals. Accuracy is enhanced by an internal reference. Each comparator provides a high impedance current source output which are all very closely matched and simultaneously adjustable with a single external resistor. A control signal applied to the mode select pin determines whether the display is driven in a moving-dot or bar-graph format.
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