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DS8880 Datasheet High Voltage 7-Segment Decoder Driver

Manufacturer: National Semiconductor (now Texas Instruments)

Download the DS8880 datasheet PDF. This datasheet also includes the DS8880J variant, as both parts are published together in a single manufacturer document.

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Note: The manufacturer provides a single datasheet file (DS8880J_NationalSemiconductor.pdf) that lists specifications for multiple related part numbers.

General Description

The DS7880 DS8880 is custom designed to decode four lines of BCD and drive a gas-filled seven-segment display tube Each output constitutes a switchable adjustable current sink which provides constant current to the tube segment even with high tube anode supply tolerance or fluctuation These current sinks have a voltage compliance from 3V to at least 80V typically the output current varies 1% for output voltage changes of 3 to 50V Each bit line of the decoder switches a current sink on or off as prescribed by the input code Each current sink is ratioed to the b-output current as required for even illumination of all segments Output currents may be varied over the 0 2 to 1 5 mA range for driving various tube types or multiplex operation The output current is adjusted by connecting an external pro- gram resistor (RP) from VCC to the Program input in accordance with the programming curve The circuit design provides a one-to-one correlation between program input current and b-segment output current The Blanking Input provides unconditional blanking of any output display while the Ripple Blanking pins allow simple leading- or trailing-zero blanking

Overview

DS7880 DS8880 High Voltage 7-Segment Decoder Driver March 1988 DS7880 DS8880 High Voltage 7-Segment Decoder Driver.

Key Features

  • Y Current sink outputs Y Adjustable output current 0 2 to 1 5 mA Y High output breakdown voltage 110V typ Y Suitable for multiplex operation Y Blanking and Ripple Blanking provisions Y Low fan-in and low power Logic Diagram C1995 National Semiconductor Corporation TL F 5845 TL F 5845.
  • 1 RRD-B30M105 Printed in U S A Absolute Maximum Ratings (Note 1) If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availabili.

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