HEWLETT IY oo ccpane COMPONENTS .43 INCH SEVEN SEGMENT DISPLAYS HIGH EFFICIENCY RED - 5082-7650 SERIES YELLOW - 5082-7660 SERIES GREEN - 5082-7670 SERIES TECHNICAL DATA APRIL 1976 Features e LARGE DIGIT Viewing up to 6 meters (19.7 feet) @ CHOICE OF 3 BRIGHT COLORS High Efficiency Red Yellow Green @ LOW CURRENT OPERATION As Low as 3mA per Segment Designed for Multiplex Operation e EXCELLENT CHARACTER APPEARANCE Evenly Lighted Segments Wide Viewing Angle Body Color Improves Off Segment Contrast EASY MOUNTING ON PC BOARD OR SOCKETS Industry Standard 7.62mm (.3) DIP Leads on 2.54mm (.1) Centers CATEGORIZED FOR LUMINOUS INTENSITY Assures Uniformity of Light Output from Unit to Unit within a Single Category e IC COMPATIBLE @ MECHANICALLY RUGGED Devices Part No. -7650 -7651 -7653 ~7656 -7660 ~7661 -7663 -7666 ~7670 -7671 -7673 ~7676 Note: Universal pinout brings the anode and cathode of each segments LED out to separate pins, see internal diagram D. Description The 5082-7650, -7660, and -7670 series are large 10.92mm (.43 in.) Red, Yellow, and Green seven segment displays. These displays are designed for use in instruments, point of sale terminals, clocks, and appliances. The -7650 and -7560 series devices utilize high efficiency LED chips which are made from GaAsP on a transparent GaP substrate. The -7670 series devices utilize chips made from GaP on a transparerit GaP substrate. 50Package Dimensions 7,01 (276) 4~ . 7.91 (276) 1e- +| >| fe-t0 >| fs 10 4 rt 1 1+ i al ape / 14 2 ' 2p Ae 13 i ape 13 i 2 je. H+ [12 ie [12 ey a HN | als $111 10.92 (430) 10.92 430) 4 = #4 19.05 0.25 , Piper Hd, 10.36 . (750 + 010} (408) LHOP. 5 ll I 10 5 ] Je 10 | sf 0 f] tlio + ae c+]9 6 [+ 419 b ofa 0 Holy d OF LOU ad * 3.18 (.125) | ! spe Noes Te 8 3.18 (.125) y 7 \weH 8 Roe. 4 ' a 2 - N L >| 5.08 (.200) Note 4 | RHP. NoTE [4 6.35 (.250) |e >| 6.35 (250) f< ---=}<-+4- 5.21 (.205) A B,C D FRONT VIEW FUNCTION LUMINOUS ap INTENSITY A 8 D CATEGORY 1.52 _, PIN |: -2680/-7660/.-| -7689Y-7661/ -|.-7683/~7663/- | -7656/-7666/ | 4 12.70 (500) {.060) ae -7878 TBI ASI3 1618 Max. - | TO CATHODE a | CCATHODE-a > | ANODE-a CATHODE-d % i 2: | CATHODE! ) CATHODE' | ANODE ANODE-d sey 0.51 a8: 2 ANODE) ANQDET) CATHODEIS) | -NO-PIN 6.35 (.250) su P= (.020) 4 | NO PIN NO PIN NO.PIN CATHODEc , 19.05 0.26 |B. boy 15.24 ; (.750 + 010) Fg (.600) 6 TL NOPIN NO PIN NO PIN CATHODE 4.06 (.160} | | a = 6 | CATHODE dp- | NO CONN: ISI WO CONN: ISI] ANODE MIN, : ! t 7 PORTHODES CATHODE. "| -ANODEs ANODE-< f | |||- 0.25 L010) ZL _ BP CATHODE: | CATHODE | ANODE- ANODE-dp 9 NO-CONN.ISI | CATHODE-dp: | ANODE-dp CATHODE-dp 7-62 (300) [=e * DATA CODE 2.54 (100) 10 | CATHODE: || CATHODE: || ANODE. | CATHODES ) 14-1) CATHODE | -CATHODE-g | ANODEg CATHODEs | END VIEW SIDE VIEW 422) NO PIN: NO.PEN: NO'PIN. NO PIN : 13, -CATHODE-b | CATHODE-b. |) ANODE-b ANODE 8 - : NOTES: 44. ANODE SI ANODELI GATHODEIE!: | ANGOEt | 1. Dimensions in millimeters and (inches). 2. All untoleranced dimensions are for reference only. 3. Redundant anodes. 4. Unused dp position. 5. See internal Circuit Diagram. 6. Redundant cathode. A B c Bo . , : Absolute Maximum Ratings | Notes: 1. See power derating bene 50mW ~20C to +85C 20C to +85C DC Power Dissipation Per Segment or o.p.'? (Ta=25C) Operating Temperature Range Storage Temperature Range Peak Forward Current Per Segment or D.PPXT.=25C) bbe b eet e tence ens 60mA DC Forward Current Per Segment or p.p{e?) (TaA=25C) oe ee 20mA Reverse Voltage Per Segment or DP... 1... nee 6.0V eee renee e eee ees 230C for 3 Sec [1.59mm (1/16 inch) below seating plane!*}] Lead Soldering Temperature curve (Fig.2). 2. Derate average current from 50C at 0.4mA/C per segment. 3, See Maximum Toler- able Segment Peak Current vs Pulse Duration curve, (Fig. 1). 4. Clean only in water, isopropanol. ethanol, Freon TF or TE (or equivalent) and Genesolv Dl-150r DE-15 (or equivalent). olElectrical /Optical Characteristics at T,=25C HIGH EFFICIENCY RED 5082-7650/-7651/-7653/-7656 Parameter Max. Units Luminous (Digit Average) : ped Peak nm Dominant nm Forward Voitage/Segment or v Reverse Current/Segment-or T YELLOW 5082-7660/-7661/-7663/-7666 Parameter Luminous (Digit Average) Peak Forward Voltage/Segment or. D:P. Reverse D:P: Temperature Coefficient of:V; GREEN 5082-7670/-7671/-7673/-7676 Parameter Luminous (Digit Average) Peak Wavelength Dominant Forward Voltage/Segment or Reverse Response Time : ns Temperature Coefficient of V 0 mv NOTES: 5. The digits are categorized for luminous intensity with the intensity categcry designated by a letter located on the right hand side of the package. 6. The dominant wavelengtt, Au, is derived from the C.I.E. Chromaticity Diagram andis that single wavelength which defines the color of the device. 7. Time for a 10% - 90% change of light intensity for step change in current. 8. Temperature coefficient f luminous intensity I,/C is determined by the formula: Weg = baste .982)!Ta ~ 25C] 52bc max ~ MAXIMUM DC CURRENT ~ mA 20 a AAu8eod RATIO OF MAXIMUM OPERATING PEAK CURRENT TO TEMPERATURE DERATED MAXIMUM DC CURRENT beAK MAX be Max 1 10 100 OPERATION IN THIS REGION REQUIRES TEMPERATURE DERATING OF loc max t -~ BC OPERATION 1000 10000 tp - PULSE DURATION - SEC Figure 1. Maximum Tolerable Peak Current vs, Pulse Duration. 20 50 18 43 2 | 16 37g w 14 3 8 & 12 2 8 5 10 2 3 8 13s 8 = | 6 W * 3 4 7 2 ao 2 3 0 0 o 10 20 30 40 #50 60 70 808590 Ta - AMBIENT TEMPERATURE C Figure 2. Maximum Allowable DC Current and DC I, FORWARD CURRENT ~ mA Power Dissipation Per Segment as a Function of Ambient Temperature. 60 j 50 {| [~ 6082-7650. SERIES 4 i 1 t t 40 frm 5 982-7660 SERIES. Ii od br 5082-7670 SERIES / 30 20 L | /) 10 LA ou tt ytd a 0.5 1.0 1.4 1.6 1.82.02.224262.83.03.2 Ve - FORWARD VOLTAGE Vv Figure 4. Forward Current vs. Forward Voltage Characteristic. 0 5 10 15 20 25 30 35 40 45 50 55 60 65 Ipcax PEAK SEGMENT CURRENT - mA Figure 3. Relative Luminous Efficiency (Luminous intensity per Unit Current} vs. Peak Segment Current. pea] : = az [AMBERTIAN DISTRIBUTION ey, Figure 5. Normalized Angular Distribution of Luminous Intensity. 53Operational Considerations ELECTRICAL The 5082-7600 series of display products are arrays of eight light emitting diodes which are optically magnified to form seven individual segments plus a decimal point. The diodes in these displays utilize a Gallium Arsenide Phosphide junction on a Gallium Phosphide substrate to produce high efficiency red and yellow emission spectra and a Gallium Phosphide junction for the green. In the case of the red displays, efficiency is improved by at least a factor of 4 over the standard Gallium Arsenide Phosphide based technology. The use of Gallium Phosphide as the substrate does result in an internal dynamic resistance in the range of 12-480. It is this resistance which causes the substantially higher forward voltage specifications in the new devices. The user should be careful to scale the appropriate forward voltage from the V;: versus |; curve, Figure 4, when designing for a particular forward current. Another way to obtain Vp would be to use the following formula: Ve = Vsma + Rs (Ip 5MA) where Vsma and Rs are found in the following table: Device Vsma Rs -7650 Series 1.65V 210. -7660 Series 1.75V 250 -7670 Series 1.85V 190 Figure 1 relates refresh rate, f. and pulse duration, tp, toa ratio which defines the maximum desirable operating peak current as a function of derated dc current, lp max/Ipc Max, TO most effectively utilize Figure 1, per- form the following steps: 1. Determine desired duty factor. Example: Four digit display, duty factor = 1/4 Nw . Determine desired refresh rate, f. Use duty factor to calculate pulse duration, tp. Note: ftp = Duty Factor Example: f=1 KHz; tp=250 usec 3. Enter Figure 1 at the calculated tp. Move vertically to the refresh rate line and then record the corresponding value of Ip Max/Ipe MAX. Example: At tp=250 psec and f=1 kHz, Ip max/Ipc MAx=2.5 4. From Figure 2, determine the value for Ipc Max. Note: Inc max is derated above Ta=50C Example: At Ta=70C, Inc Max=12mMA 5. Calculate Ip max from Ip max/Ipc calculate lava from Ip and duty factor. Example: Ip = (2.5) (12mA) = 30mA peak lavG=(1/4) (30MA) = 7.5mA average. Max ratio and The above calculations determine the maximum tolerable strobing conditions. Operation at a reduced peak current or duty factor is suggested to help insure even more reliable operation. Refresh rates of 1kHz or faster provide the most efficient operation resulting in the maximum possible time average luminous intensity. These displays may be operated in the strobed mode at currants up to 60mMA peak. When operating at peak currents above 5mA for red and yellow or 10mA for green, there will be an improvement in the relative efficiency of the display (see Figure 3). Light output at higher currents can be calculated using the following relationship: lave TTPPAR IvrimE AVG =] | J oo cee lave spec}|]| TPPEAK SPEC lave = Operating point average current lave, spec= Average current for data sheet luminous in- tensity value, Iv gpec NIprax Relative efficiency at operating peak current. TIPEAK SPEC Relative efficiency at data sheet peak current where luminous intensity lv opyc- is specified. Iv gpre Data sheet luminous intensity, specified at lava sprc and Iprak spre. Example: Ip = 40mA and lava = 10mA: 1.5 Iv TIME AVG = ta () (300ud) = 948ucd/seg. 5mA 1 CONTRAST ENHANCEMENT The 5082-7600 series devices have been optimized for use in actual display systems. In order to maximum ON-OFF contrast, the bodies of the displays have been painted to match the appearance of an unilluminated segment. The emission wavelength of the red displays has been shifted from the standard GaAsP 655nm to 635nm in order to provide an easier to read device. All of the colored display products should be used in conjunction with contrast enhancing filters. Some suggested contrast filters: for red displays, Paneigraphic Scarlet Red 65 or Homalite 1670; for yellow displays, Panielgraphic Amber 23 or Homalite (100-1720, 100-1726); for green, Panelgraphic Green 48 or Homalite (100-1440, 100-1425). Another excellent contrast enhancement material for all colors is the 3M light control film. MECHANICAL The 5082-7600 series devices are constructed utilizing a lead frame in a standard DIP package. The individual packages may be close-packed on 12.7mm (.5in.) centers on a PC board. Also, the larger character height allows other character spacing options when desired. The leadframe has an integral seating plane which will hold the package approximately 1.52mm (.060 in.) above the PC board during standard soldering and flux removal operation. To optimize device performance, new materials are used that are limited to certain solvent materials for flux removal. It is recommended that only mixtures of Freon and alcohol be used for post solder vapor cleaning processes. with an immersion time in the vapors up to two minutes maximum. Suggested products are Freon TF, Freon TE, Genesolv DI-15 and Genesolv DE-15. Isopro- ponal, Ethanol or water may also be used for cleaning operations. 54