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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
XR-2206 Monolithic Function Generator Exar Corporation
XR-2207 Voltage-Controlled Oscillator Exar Corporation
XR-2208 OPERATIONAL MULTIPLIER Exar Corporation
XR-2209 Voltage-Controlled Oscillator Exar Corporation
XR-2211 FSK Demodulator/ Tone Decoder Exar Corporation

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

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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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