5082 7444 5082-7445 BUSINESS CALCULATORS 5082.7447 SPECIAL P

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5082 7444 5082-7445 BUSINESS CALCULATORS 5082.7447 SPECIAL P

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HEWLETT PACKARD COMPONENTS
5082 7444
5082-7445 BUSINESS CALCULATORS 5082.7447
SPECIAL PARTS SCIENTIFIC
TENTATIVE DATA APRIL 1976
COMPATIBLE
driven directly from most
circuits.
POWER
Excellent readability only 2!>0fjA average segment.
UNIFORM ALIGNMENT Excellent Alignment assured design.
MATCHED BRIGHTNESS Uniformity light output from digit digit single board.
14-DIGIT AVAILABLE DIGIT HEIGHTS (inches)] [2.5'l(.100) 2.84(.112)]
12-DIGIT DISPLAYS AVAILAEiLE PINOUTS.
Description
5082-7442, 7444, 7445, 7447' seven segment GaAsP Numeric indicators mounted digit configurations P.C. board. Thes;e special parts designed specifically scientific business calculators have right hand decimal points mounted (4.45mm) centers digit configurations (3.81mm) centers digit configurations. plastic lens magnifies digits includes integral protective bezel.
Applications primarily portable, hand held calculators other products requiring power, cost, long lifetime indicators which occupy minimum space.
Device Selection Guide
Digits Board Digit Height (inches) Configuration Part 5082-
DEVICE
2.54 (.100) Figure 7442 7445
2.54 (.100) hihi Figure 7444
2.84 (.112) Figure 7447
*5082-7447 5082-7444 with slide-in cylindrical lens provide added magnification.
Maximum Ratings
Parameter Symbol Min. Max. Units
Peak Forward Current Segment (Duration <500/js) IpEAK
Average Current Segment dp'" Javg
Power Dissipation Digit
Operating Temperature, Ambient
Storage Temperature
Reverse Voltage
Solder Temperature connector edge sec.)'2'
NOTES: Derate linearly 0.1mA/oC above ambient.
Mechanical section recommended soldering techniques flux removal solvents.
Electrical/Optical Characteristics
Part Parameter Symbol Test Condition Min. Typ. Max. Units
7442/7445 Luminous Intensity/ Segment (Digit Average) Peak 1/12 Duty Cycle jucd
7444/7447 Peak 1/14 Duty Cycle ,ucd
7442/7445 7444/7447 Peak Wavelength Apeak
Forward Voltage/ Segment 1.55
NOTE: Operation Peak Currents less than 3.5mA recommended.
PEAK FORWARD VOLTAGf
Figure Peak Forward Current Peak Forward Voltage
"iv.
AMBIENT TEMPERATURE
Figure Relative Luminous intensity Ambient Temperature Fixed Current Level.
IPEAK PEAK CURRENT SEGMENT
Figure Relative Luminous Efficiency Peak Current Segment.
Electrical/Optical
5082-7442, 7444, 7445 7447 devices utilize monolithic GaAsP chip containing segments decimal point each display digit. segments each digit interconnected, forming line array, where number digits display. Each chip positioned under separate element plastic magnifying lens, producing magnified character. Satisfactory viewing will realized within angle approximately from centerline digit. filter, such plexiglass 2423, Panelgraphic
Homalite 100-1600, will lower ambient reflectance improve display contrast. Digit encoding these devices performed standard segment decoder driver circuits.
These devices tested digit-to-digit luminous intensity matching. This test performed with power supply component values selected supply Ipeak 1.55V. device driven from potentials less than volts, recommended that factory contacted.
Mechanical specifications special Cleaning instructions
5082-7442, 7444, 7445 7447 devices constructed silver plated printed circuit board substrate. molded plastic liens array attached board over digits provide nification.
These devices mounted using several different techniques. most straightforward standard board edge connectors. less expensive approach implemented through stamped etched metal mounting clips such those available from Burndy (Series LED-B) ,JAV Manufacturing (Series 1255). Some these devices will also serve integral display support. third approach would wire stakes which would first soldered mother-board display board then inserted over wire stakes soldered place.
devices soldered seconds maximum soldering temperature 230"C. Heat should applied only edge connector areas board. Heating other areas boa-d temperatures excess result permanent damage lens. recommended that rosin core wire solder temperature deactivating flux solid core wire solder used soldering operations. solder containing approximately silver will enhance solderability preventing leaching plated silver board into solder solution.
bulk cleaning after flow solder operation, following process recommended. Wash display clean liquid Freon Freon TE-35 solvent time period minutes maximum. sufficient length time allow solvent evaporate from beneath display lens. Maintain solvent temperature below Methanol, Isopropanol, ethanol used cleaning room temperature. Soap water solutions utilized removing water-soluble fluxes from contact area must allowed collect under display lens.
Solvent vapor cleaning elevated temperatures recommended such processes will damage display lens. Ketones, esters, aromatic chlorinated hydrocarbon solvents will also damage display lens. Alcohol base active rosin flux mixtures should prevented from coming contact with display lens.
These devices constructed silver plated printed circuit board. prevent formation tarnish (Ag2S) which could impair solderability, boards should stored unopened shipping packages until they used. Further information storage, handling cleaning silver-plated components contained Hewlett-Packard Application Bulletin
Device Description
5082-7442
5082-7444
5082-7447 5002-7445
Function Function
Cathode Digit Anode Segment
Cathode Digit Anode Segment
Cathode Digit Anode Segment
Anode Segment Anode Segment
Cathode Digit Anode Segment
Anode Anode Segment
Cathode Digit Anode Segment
Anode Segment Anode Segment
Cathode Digit Cathode Digit
Anode Segment Cathode Digit
Cathode Digit Cathode Digit
5082-7442
5082-7444
5082-7447 5082-7445
Function Function
Anode Segment Cathode Digit
Cathode Digit Cathode Digit
Anode Segment Cathode Digit
Cathode Digit Cathode Digit
Anode Segment Cathode Digit
Cathode Digit Cathode Digit
Anode Segment Cathode Digit
Cathode Digit Cathode Digit
Cathode Digit Cathode Digit
Cathode Digit
Cathode Digit
*7444 7447 only.
Package Dimensions
56,8 (2.235)-
-4.5 (.175) PLCS
NON-ACCUM. TOLERANCES)
(KHB033DSGBO
(.100)
PLCS NON-ACCUM. TOLERANCES)
1.58'.254 (.0621.010)
DEVICE
5082-7442 60.3 6.03
U375) (.0401
$082.7445 59.6 5.70 1.42
(2.345) (.2225) (.056)
DIAMETER THROUGH PLACES r.13 (.005)
12.7 (.50
.005)
PROTECTIVE BEZEL
DEVICE
3082-7442 2.54 (.100) 1.42 (.ose)
>082-7444 2.54 (.100) 1.40 (.055)
15082-7445 (.100) 4.42 (.056)
15082-7447 2.84 (.112) 1.40 (.055)
/ILL DIMENSIONS MILLIMETERS (INCHES).
TOLERANCES DIMENSIONS (.015) UNLESS OTHERWISE SPECIFIED.

5082 7444 5082-7445 BUSINESS CALCULATORS 5082.7447 SPECIAL P

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