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DS8869N, DS8870, DS8880

Table of contents:
Info of DS8869N
Info of DS8870
Info of DS8880

DS8869N, DS8870, DS8880 Selling Leads, Datasheet

MFG:45 Package Cooled:NS D/C:05+

DS8869N, DS8870, DS8880 Datasheet download

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Part Number: DS8869N

MFG: 45

Package Cooled: NS

D/C: 05+

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DS8880 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 currentas 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 program 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.

DS8880 Maximum Ratings

VCC                                                                         7V
Input Voltage (Except BI)                                        6V
Input Voltage (BI)                                                   V_CC
Segment Output Voltage                                       80V
Power Dissipation                                           600 mW
Maximum Power Dissipation*                            at 25
Cavity Package                                              1509 mW
Molded Package                                            1476 mW
Transient Segment Output Current
(Note 4)                                                             50 mA
Storage Temperature Range             ±65 to a150
Lead Temperature (Soldering, 4 sec.)             260

DS8880 Features

*Current sink outputs
* Adjustable output currentÐ0.2 to 1.5 mA
* High output breakdown voltageÐ110V typ
* Suitable for multiplex operation
* Blanking and Ripple Blanking provisions
* Low fan-in and low power

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