Germanium Diodes Kae! TYPE TD261,A TD271,A TD262,A | 1TD272,A TD263,A,B | 10273,A,B TD264,A | 1TD274,A TD265,A | TD275,A TD266,A | TD276,A The General Electric TD261,A through TD266A series of tunnel diodes are extremely fast, P-Type germanium devices with peak currents of 2.2, 4.7; 10, 22, 50 and 100 ma. Among the unusual features offered by these tunnel diodes are high Ip/Iy ratios and C/Ip ratios as low as 0.025 pf/ma. New manufacturing techniques provide a high temperature tunnel diode capable of 100C storage and operation resulting in high reliability performance. Types TD271,A through TD276,A are built in a special microwave package which has electrical characteristics of the TD260 line with a series inductance of .15 mh. Specially selected units offering parameter variations or tighter control are also available. absolute maximum ratings: (25C) TD261 TD262 TD263 TD264 TD265 TD266 TD261A TD262A TD263A TD264A TD265A TD266A T0271 D272 TD263B TD274 1TD275 TD276 TD271A TD272A T0273 TD274A TD275A TD276A TD273A TD273B Maximum Power Dissipation 1.5 3.5 7 7.5 18 35 mw / Operating and Storage Temperature ~55 to +100C C Lead Temperature 1/16 + 1/32 from case for 10 seconds -= 230 c *Derate maximum forward current 1% per C for ambients in excess of 25C. electrical characteristics: (25C) COLOR DOT** BROWN BROWN/GRAY RED RED/GRAY TD261 TD261A TD262 TD262A TD271 TD271A TD272 TD272A Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Peak Point Current Ip 2.0 2.2 2.4 2.0 2.2 2.4 4.2 4.7 5.2 4.2 4.7 5.2 ma Valley Point Current Iy 20. 31 22 ~B1 45 = .60 45 .60 ma Peak Point Voltage Vp 70 100 80 110 80 110 90 120 mv Valley Point Voltage Vv 390 390 390 400 mv Forward Voltage (ip = Ip) VrFp* 500 540 650 500 580 650 500 560 650 500 575 650 mv (Ip = .25 Ip) VFs 420 500 420 500 435 510 435 530 mv Total Series inductance TD260 Ls 1.5 1.5 1.5 1,5 nh TD270 Ls 5 15 AS 15 nh Total Series Resistance Rg 5 7 3.5 4.0 ohms Valley Point Terminal Capacitance Cy 1.8 3.0 0.65 1.0 2.8 6.0 0.65 1.0 pf Rise Time t,*** 430 160 320 74 Psec *Max Vp on TD270 devices is 675 mv **TD270 series marked with white cathode dot only *** Switching speed with constant current drive, t, ~ Vrp Vp Cy 1416 Ip IvyTD261,A 66,A | TD271,A 76,A _ 3 TD263,B TD273,B electrical characteristics: (25C) ORANGE/ COLOR DOT** ORANGE ORANGE/GRAY WHITE YELLOW YELLOW/GRAY TD263 TD263A TD263B TD264 TD264A TD273 TD273A TD273B TD274 TD274A Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Peak Point Current Ip 9.0 10 11 9.0 10 11 9.0 10 11 20 22 24 20 22 24 ma Valley Point Current Iy 09 14 09 14 09 14 2.7 3.1 2.7 3.1 ma Peak Point Voltage Vp 75 100 80 110 90 120 90 115 100 130 mv Valley Point Voltage Vv 400 410 420 425 425 mv Forward Voltage (Ip = Ip) Vrp* 500 560 650 520 570 650 550 600 670 500 580 650 550 610 680 mv (Ip = .25 Ip) Ves 450 510 450 530 450 540 520 460 540 mv Total Series Inductance TD260 Lg 1.5 1.5 1.5 1.5 1.5 nh TD270 Ls AS AS AS AS AS nh Total Series Resistance Rs 1.7 2.0 2.5 1.8 2.0 ohms Valley Point Terminal Capacitance Cy 6.5 9.0 3.5 53.0 1.2 2.0 7.0 18 2.5 4.0 pf Rise Time tte 350 190 68 185 64 Psec electrical characteristics: (25C) COLOR DOT** GREEN GREEN/GRAY BLUE BLUE/GRAY TD265 TD265A TD266 TD266A TD275 TD275A 1TD276 TD276A Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Peak Point Current Ip 45 50 35 45 50 55 90 100 110 90 100 110 ma Valley Point Current Iv 6.0 8.5 6.0 8.5 12.0 17.5 12.0 17.5 ma Peak Point Voltage Vp 110 180 130 200 150 6210 180 260 mv Valley Point Voltage Vv 425 425 450 450 mv Forward Voltage (ip = Ip) VrEp 520 625 700 550 640 750 520 650 720 550 680 800 mv (Ip = .25 Ip) Vs 530 480 550 530 500 550 mv Total Series Inductance TD260 Ls 1.5 1.5 1.5 1.5 nh TD270 Ls 15 AS 15 15 nh Total Series Resistance Rg 1.4 1.5 1d 1,2 ohms Valley Point Terminal Capacitance Cy 8.5 25 3.0 5.0 10.0 35 40 6.0 pf Rise Time t,*** 100 35 57 22 Psec Tp MAX OIMENSIONS WITHIN JEDEC OUTLINE DO-I8 DIMENSIONS WITHIN JEDEC OUTLINE DO-20 tet OOT WOKCATES Tp 8 CATHODE y p80 MAX 02 wi | 032 max ane _ TES aitie - 7 F { ye I: 3 DOT INDICATES Cy 4 Vp VW Ve sez J 065 mor se ain axe 500 MIN uf VY Max oS a 500 MIN ib 4. a O35 MAX. pier am 2035 WHITE CATHODE INDICATOR 002s |, ALL DIMENSIONS ARE IN INCHES AND REFERENCE UNLESS TOLERANCED. ALL DIMENSIONS IN INCHES AND ARE oor wn REFERENCE UNLESS TOLERANCED VIOLET DOT INDICATES T0260 & CATHODE ENO cron | Seems MAX J Ip MAX TD260 SERIES TD270 SERIES 1417