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  1 motorola smallsignal transistors, fets and diodes device data   part of the greenline ? portfolio of devices with energyconserving traits. this switching diode has the following features: ? very low leakage ( 500 pa) promotes extended battery life by decreas- ing energy waste. guaranteed leakage limit is for each diode in the pair contingent upon the other diode being in a nonforwardbiased condition. ? offered in four surface mount package types ? available in 8 mm tape and reel in quantities of 3,000 applications ? esd protection ? reverse polarity protection ? steering logic ? mediumspeed switching maximum ratings rating symbol value unit continuous reverse voltage v r 30 vdc peak forward current i f 200 madc peak forward surge current i fm (surge) 500 ma device marking mmbd1010lt1 = a5 mmbd2010t1 = dp mmbd3010t1 = xs thermal characteristics characteristic symbol max unit total device dissipation fr-4 board (1) t a = 25 c mmbd1010lt1, mmbd3010t1 mmbd2010t1 derate above 25 c mmbd1010lt1, mmbd3010t1 mmbd2010t1 p d 225 150 1.8 1.2 mw mw/ c thermal resistance junction to ambient mmbd1010lt1, mmbd3010t1 mmbd2010t1 r q ja 556 833 c/w junction and storage temperature t j , t stg 55 to +150 c (1) device mounted on a fr-4 glass epoxy printed circuit board using the minimum recommended footprint. preferred devices are motorola recommended choices for future use and best overall value. greenline is a trademark of motorola, inc. thermal clad is a registered trademark of the berquist company. order this document by mmbd1010lt1/d
  semiconductor technical data 3 cathode anode 1 2 anode
 

 case 318-08, style 9 sot-23 (to-236ab) motorola preferred devices 1 2 3 case 318d-04, style 3 sc59 case 419-02, style 5 sc70/sot323 mmbd1010lt1 mmbd2010t1 1 2 3 2 1 3 mmbd3010t1 ? ? motorola, inc. 1997 rev 1

 
 
 2 motorola smallsignal transistors, fets and diodes device data electrical characteristics (t a = 25 c unless otherwise noted) characteristic symbol min max unit off characteristics reverse breakdown voltage (i br = 100 m a) v (br) 30 e v reverse voltage leakage current (v r = 75 v) (2) i r e 500 pa forward voltage (i f = 1.0 ma) forward voltage (i f = 10 ma) v f e e 850 950 mv diode capacitance (v r = 0 v, f = 1.0 mhz) c d e 2.0 pf reverse recovery time (i f = i r = 10 ma) (figure 1) t rr e 3.0 m s (2) guaranteed leakage limit is for each diode in the pair contingent upon the other diode being in a nonforwardbiased condition. figure 1. recovery time equivalent test circuit notes: 1. a 2.0 k w variable resistor adjusted for a forward current (i f ) of 10 ma. notes: 2. input pulse is adjusted so i r(peak) is equal to 10 ma. notes: 3. t p ? t rr +10 v 2 k 820 w 0.1 m f dut v r 100 m h 0.1 m f 50 w output pulse generator 50 w input sampling oscilloscope t r t p t 10% 90% i f i r t rr t i r(rec) = 1 ma output pulse (i f = i r = 10 ma; measured at i r(rec) = 1 ma) i f input signal

 
 
 3 motorola smallsignal transistors, fets and diodes device data minimum recommended footprint for surface mounted applications surface mount board layout is a critical portion of the total design. the footprint for the semiconductor packages must be the correct size to insure proper solder connection interface between the board and the package. with the correct pad geometry, the packages will self align when subjected to a solder reflow process. mm inches 2.5-3.0 0.039 1.0 0.094 0.8 0.098-0.118 2.4 0.031 0.95 0.037 0.95 0.037 sot23 mm inches 0.037 0.95 0.037 0.95 0.079 2.0 0.035 0.9 0.031 0.8 sc59 mm inches 0.035 0.9 0.075 0.7 1.9 0.028 0.65 0.025 0.65 0.025 sc70/sot323 sod123 mm inches 0.91 0.036 1.22 0.048 2.36 0.093 4.19 0.165 power dissipation for a surface mount device the power dissipation for a surface mount device is a function of the drain/collector pad size. these can vary from the minimum pad size for soldering to a pad size given for maximum power dissipation. power dissipation for a surface mount device is determined by t j(max) , the maximum rated junction temperature of the die, r q ja , the thermal resistance from the device junction to ambient, and the operating temperature, t a . using the values provided on the data sheet, p d can be calculated as follows: p d = t j(max) t a r q ja the values for the equation are found in the maximum ratings table on the data sheet. substituting these values into the equation for an ambient temperature t a of 25 c, one can calculate the power dissipation of the device. for example, for a sot23 device, p d is calculated as follows. p d = 150 c 25 c 556 c/w = 225 milliwatts the 556 c/w for the sot23 package assumes the use of the recommended footprint on a glass epoxy printed circuit board to achieve a power dissipation of 250 milliwatts. there are other alternatives to achieving higher power dissipation from the surface mount packages. one is to increase the area of the drain/collector pad. by increasing the area of the drain/collector pad, the power dissipation can be increased. although the power dissipation can almost be doubled with this method, area is taken up on the printed circuit board which can defeat the purpose of using surface mount technology. another alternative would be to use a ceramic substrate or an aluminum core board such as thermal clad ? . using a board material such as thermal clad, an aluminum core board, the power dissipation can be doubled using the same footprint.

 
 
 4 motorola smallsignal transistors, fets and diodes device data soldering precautions the melting temperature of solder is higher than the rated temperature of the device. when the entire device is heated to a high temperature, failure to complete soldering within a short time could result in device failure. therefore, the following items should always be observed in order to minimize the thermal stress to which the devices are subjected. ? always preheat the device. ? the delta temperature between the preheat and soldering should be 100 c or less.* ? when preheating and soldering, the temperature of the leads and the case must not exceed the maximum temperature ratings as shown on the data sheet. when using infrared heating with the reflow soldering method, the difference should be a maximum of 10 c. ? the soldering temperature and time should not exceed 260 c for more than 10 seconds. ? when shifting from preheating to soldering, the maximum temperature gradient should be 5 c or less. ? after soldering has been completed, the device should be allowed to cool naturally for at least three minutes. gradual cooling should be used as the use of forced cooling will increase the temperature gradient and result in latent failure due to mechanical stress. ? mechanical stress or shock should not be applied during cooling * soldering a device without preheating can cause excessive thermal shock and stress which can result in damage to the device. solder stencil guidelines prior to placing surface mount components onto a printed circuit board, solder paste must be applied to the pads. a solder stencil is required to screen the optimum amount of solder paste onto the footprint. the stencil is made of brass or stainless steel with a typical thickness of 0.008 inches. the stencil opening size for the surface mounted package should be the same as the pad size on the printed circuit board, i.e., a 1:1 registration.

 
 
 5 motorola smallsignal transistors, fets and diodes device data typical solder heating profile for any given circuit board, there will be a group of control settings that will give the desired heat pattern. the operator must set temperatures for several heating zones, and a figure for belt speed. taken together, these control settings make up a heating aprofileo for that particular circuit board. on machines controlled by a computer, the computer remembers these profiles from one operating session to the next. figure 2 shows a typical heating profile for use when soldering a surface mount device to a printed circuit board. this profile will vary among soldering systems but it is a good starting point. factors that can affect the profile include the type of soldering system in use, density and types of components on the board, type of solder used, and the type of board or substrate material being used. this profile shows temperature versus time. the line on the graph shows the actual temperature that might be experienced on the surface of a test board at or near a central solder joint. the two profiles are based on a high density and a low density board. the vitronics smd310 convection/infrared reflow soldering system was used to generate this profile. the type of solder used was 62/36/2 tin lead silver with a melting point between 177 189 c. when this type of furnace is used for solder reflow work, the circuit boards and solder joints tend to heat first. the components on the board are then heated by conduction. the circuit board, because it has a large surface area, absorbs the thermal energy more efficiently, then distributes this energy to the components. because of this effect, the main body of a component may be up to 30 degrees cooler than the adjacent solder joints. step 1 preheat zone 1 arampo step 2 vent asoako step 3 heating zones 2 & 5 arampo step 4 heating zones 3 & 6 asoako step 5 heating zones 4 & 7 aspikeo step 6 vent step 7 cooling 200 c 150 c 100 c 50 c time (3 to 7 minutes total) t max solder is liquid for 40 to 80 seconds (depending on mass of assembly) 205 to 219 c peak at solder joint desired curve for low mass assemblies 100 c 150 c 160 c 140 c figure 2. typical solder heating profile desired curve for high mass assemblies 170 c

 
 
 6 motorola smallsignal transistors, fets and diodes device data package dimensions case 31808 issue af sot23 (to236ab) style 9: pin 1. anode 2. anode 3. cathode d j k l a c b s h g v 3 1 2 dim a min max min max millimeters 0.1102 0.1197 2.80 3.04 inches b 0.0472 0.0551 1.20 1.40 c 0.0350 0.0440 0.89 1.11 d 0.0150 0.0200 0.37 0.50 g 0.0701 0.0807 1.78 2.04 h 0.0005 0.0040 0.013 0.100 j 0.0034 0.0070 0.085 0.177 k 0.0140 0.0285 0.35 0.69 l 0.0350 0.0401 0.89 1.02 s 0.0830 0.1039 2.10 2.64 v 0.0177 0.0236 0.45 0.60 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. 3. maxiumum lead thickness includes lead finish thickness. minimum lead thickness is the minimum thickness of base material. case 41902 issue h sc70/sot323 style 5: pin 1. anode 2. anode 3. cathode c r n a l d g v s b h j k 3 12 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. dim min max min max millimeters inches a 0.071 0.087 1.80 2.20 b 0.045 0.053 1.15 1.35 c 0.035 0.049 0.90 1.25 d 0.012 0.016 0.30 0.40 g 0.047 0.055 1.20 1.40 h 0.000 0.004 0.00 0.10 j 0.004 0.010 0.10 0.25 k 0.017 ref 0.425 ref l 0.026 bsc 0.650 bsc n 0.028 ref 0.700 ref r 0.031 0.039 0.80 1.00 s 0.079 0.087 2.00 2.20 v 0.012 0.016 0.30 0.40 0.05 (0.002)

 
 
 7 motorola smallsignal transistors, fets and diodes device data case 318d04 issue f sc59 style 3: pin 1. anode 2. anode 3. cathode s g h d c b l a 1 3 2 j k dim a min max min max inches 2.70 3.10 0.1063 0.1220 millimeters b 1.30 1.70 0.0512 0.0669 c 1.00 1.30 0.0394 0.0511 d 0.35 0.50 0.0138 0.0196 g 1.70 2.10 0.0670 0.0826 h 0.013 0.100 0.0005 0.0040 j 0.09 0.18 0.0034 0.0070 k 0.20 0.60 0.0079 0.0236 l 1.25 1.65 0.0493 0.0649 s 2.50 3.00 0.0985 0.1181 notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: millimeter.

 
 
 8 motorola smallsignal transistors, fets and diodes device data motorola reserves the right to make changes without further notice to any products herein. motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. atypicalo parameters which may be provided in motorola data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. all operating parameters, including atypicalso must be validated for each customer application by customer's technical experts. motorola does not convey any license under its patent rights nor the rights of others. motorola products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the motorola product could create a situation where personal injury or death may occur. should buyer purchase or use motorola products for any such unintended or unauthorized application, buyer shall indemnify and hold motorola and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that motorola was negligent regarding the design or manufacture of the part. motorola and are registered trademarks of motorola, inc. motorola, inc. is an equal opportunity/affirmative action employer. mfax is a trademark of motorola, inc. how to reach us: usa / europe / locations not listed : motorola literature distribution; japan : nippon motorola ltd.: spd, strategic planning office, 4321, p.o. box 5405, denver, colorado 80217. 3036752140 or 18004412447 nishigotanda, shinagawaku, tokyo 141, japan. 81354878488 mfax ? : rmfax0@email.sps.mot.com touchtone 6 022446609 asia / pacific : motorola semiconductors h.k. ltd.; 8b tai ping industrial park, us & canada only 18007741848 51 ting kok road, tai po, n.t., hong kong. 85226629298 internet : http://motorola.com/sps mmbd1010lt1/d ?


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