? semiconductor components industries, llc, 2001 april, 2001 rev. 1 1 publication order number: uma4nt1/d uma4nt1, uma6nt1 preferred devices dual common emitter bias resistor transistors pnp silicon surface mount transistors with monolithic bias resistor network the brt (bias resistor transistor) contains a single transistor with a monolithic bias network consisting of two resistors; a series base resistor and a baseemitter resistor. these digital transistors are designed to replace a single device and its external resistor bias network. the brt eliminates these individual components by integrating them into a single device. in the umc2nt1 series, two brt devices are housed in the sot353 package which is ideal for low power surface mount applications where board space is at a premium. ? simplifies circuit design ? reduces board space ? reduces component count ? available in 8 mm, 7 inch/3000 unit tape and reel maximum ratings (t a = 25 c unless otherwise noted, common for q 1 and q 2 , minus sign for q 1 (pnp) omitted) rating symbol value unit collector-base voltage v cbo 50 vdc collector-emitter voltage v ceo 50 vdc collector current i c 100 madc thermal characteristics thermal resistance junction-to-ambient (surface mounted) r q ja 833 c/w operating and storage temperature range t j , t stg 65 to +150 c total package dissipation @ t a = 25 c (note 1.) p d * 150 mw device marking and resistor values device marking r1 (k) r2 (k) uma4nt1 uma6nt1 u0 u1 10 47 1. device mounted on a fr-4 glass epoxy printed circuit board using the minimum recommended footprint. sc88a/sot353 case 419a style 7 http://onsemi.com device package shipping ordering information uma4nt1 sot323 3000/tape & reel ux = device marking x = 0 or 1 ux marking diagram 13 2 4 5 preferred devices are recommended choices for future use and best overall value. uma6nt1 sot323 3000/tape & reel 5 q1 q2 r1 r1 31 2 4
uma4nt1, uma6nt1 http://onsemi.com 2 electrical characteristics (t a = 25 c unless otherwise noted) characteristic symbol min typ max unit off characteristics collector-base cutoff current (v cb = 50 v, i e = 0) i cbo 100 nadc collector-emitter cutoff current (v cb = 50 v, i b = 0) i ceo 500 nadc emitter-base cutoff current uma4nt1 (v eb = 6.0, i c = 5.0 ma) uma6nt1 i ebo 0.9 0.2 madc on characteristics collector-base breakdown voltage (i c = 10 m a, i e = 0) v (br)cbo 50 vdc collector-emitter breakdown voltage (i c = 2.0 ma, i b = 0) v (br)ceo 50 vdc dc current gain uma4nt1 (v ce = 10 v, i c = 5.0 ma) uma6nt1 h fe 160 160 250 250 collectoremitter saturation voltage (i c = 10 ma, i b = 0.3 ma) v ce(sat) 0.25 vdc output voltage (on) (v cc = 5.0 v, v b = 2.5 v, r l = 1.0 k ) v ol 0.2 vdc output voltage (off) (v cc = 5.0 v, v b = 0.5 v, r l = 1.0 k ) v oh 4.9 vdc input resistor uma4nt1 uma6nt1 r1 7.0 33 10 47 13 61 k figure 1. derating curve 250 200 150 100 50 0 50 0 50 100 150 t a , ambient temperature ( c) p d , power dissipation (milliwatts) r q ja = 833 c/w
uma4nt1, uma6nt1 http://onsemi.com 3 typical electrical characteristics uma4nt1 figure 2. v ce(sat) versus i c i c , collector current (ma) 10 1 0.1 80 70 60 50 40 30 20 10 0 figure 3. dc current gain i c , collector current (ma) 1000 100 10 1 100 10 1 0.01 1000 figure 4. output capacitance v r , reverse bias voltage (volts) 12 10 8 6 4 2 45 40 30 25 20 15 10 5 0 figure 5. output current versus input voltage v in , input voltage (volts) 6 5 4 3 2 1 0 10 1 0.1 0.01 0 100 v ce(sat) , maximum collector voltage (volts) h fe , dc current gain 35 c ob , capacitance (pf) i c , collector current (ma) t a = 75 c 25 c 25 c v ce = 10 v t a = 75 c 25 c 25 c i c /i b = 10 f = 1 mhz i e = 0 ma t a = 25 c t a = 25 c 25 c 75 c v o = 5 v
uma4nt1, uma6nt1 http://onsemi.com 4 typical electrical characteristics uma6nt1 figure 6. v ce(sat) versus i c i c , collector current (ma) 10 1 0.1 60 50 40 30 20 10 0 figure 7. dc current gain i c , collector current (ma) 100 10 1 100 10 0.01 1000 figure 8. output capacitance v r , reverse bias voltage (volts) 12 10 8 6 4 2 45 40 30 25 20 15 10 5 0 figure 9. output current versus input voltage v in , input voltage (volts) 5 4 3 2 1 0 10 1 0.1 0.001 0 100 v ce(sat) , maximum collector voltage (volts) h fe , dc current gain 35 c ob , capacitance (pf) i c , collector current (ma) t a = 75 c 25 c 25 c v ce = 10 v t a = 75 c 25 c 25 c i c /i b = 10 f = 1 mhz i e = 0 ma t a = 25 c t a = 25 c 25 c 75 c v o = 5 v 0.01
uma4nt1, uma6nt1 http://onsemi.com 5 information for using the sot353 surface mount package minimum recommended footprints 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. sot353 0.5 mm (min) 0.4 mm (min) 0.65 mm 0.65 mm 1.9 mm sot353 power dissipation the power dissipation of the sot353 is a function of the pad size. this can vary from the minimum pad size for soldering to the 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 which in this case is 150 milliwatts. p d = 150 c 25 c 833 c/w = 150 milliwatts the 833 c/w for the sot353 package assumes the use of the recommended footprint on a glass epoxy printed circuit board to achieve a power dissipation of 150 milliwatts. there are other alternatives to achieving higher power dissipation from the sot353 package. 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. 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.
uma4nt1, uma6nt1 http://onsemi.com 6 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. 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 10 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 177189 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 ramp" step 2 vent soak" step 3 heating zones 2 & 5 ramp" step 4 heating zones 3 & 6 soak" step 5 heating zones 4 & 7 spike" 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 10. typical solder heating profile desired curve for high mass assemblies 170 c
uma4nt1, uma6nt1 http://onsemi.com 7 package dimensions sc88a/sot353 case 419a01 issue e notes: 1. dimensioning and tolerancing per ansi y14.5m, 1982. 2. controlling dimension: inch. dim a min max min max millimeters 1.80 2.20 0.071 0.087 inches b 1.15 1.35 0.045 0.053 c 0.80 1.10 0.031 0.043 d 0.10 0.30 0.004 0.012 g 0.65 bsc 0.026 bsc h --- 0.10 --- 0.004 j 0.10 0.25 0.004 0.010 k 0.10 0.30 0.004 0.012 n 0.20 ref 0.008 ref s 2.00 2.20 0.079 0.087 v 0.30 0.40 0.012 0.016 b 0.2 (0.008) mm 123 4 5 a g v s d 5 pl h c n j k b style 7: pin 1. base 2 2. emitter 1, 2 3. base 1 4. collector 1 5. collector 2
uma4nt1, uma6nt1 http://onsemi.com 8 on semiconductor and are trademarks of semiconductor components industries, llc (scillc). scillc reserves the right to make changes without further notice to any products herein. scillc makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does scillc 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 special, consequential or incidental damages. atypicalo parameters which may be provided in scill c 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. scillc does not convey any license under its patent rights nor the rights of others. scillc 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 scillc product could create a sit uation where personal injury or death may occur. should buyer purchase or use scillc products for any such unintended or unauthorized application, buyer shall indemnify and hold scillc 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 unauthori zed use, even if such claim alleges that scillc was negligent regarding the design or manufacture of the part. scillc is an equal opportunity/affirmative action employer. publication ordering information central/south america: spanish phone : 3033087143 (monfri 8:00am to 5:00pm mst) email : onlitspanish@hibbertco.com tollfree from mexico: dial 018002882872 for access then dial 8662979322 asia/pacific : ldc for on semiconductor asia support phone : 13036752121 (tuefri 9:00am to 1:00pm, hong kong time) toll free from hong kong & singapore: 00180044223781 email : onlitasia@hibbertco.com japan : on semiconductor, japan customer focus center 4321 nishigotanda, shinagawaku, tokyo, japan 1410031 phone : 81357402700 email : r14525@onsemi.com on semiconductor website : http://onsemi.com for additional information, please contact your local sales representative. uma4nt1/d thermal clad is a trademark of the bergquist company north america literature fulfillment : literature distribution center for on semiconductor p.o. box 5163, denver, colorado 80217 usa phone : 3036752175 or 8003443860 toll free usa/canada fax : 3036752176 or 8003443867 toll free usa/canada email : onlit@hibbertco.com fax response line: 3036752167 or 8003443810 toll free usa/canada n. american technical support : 8002829855 toll free usa/canada europe: ldc for on semiconductor european support german phone : (+1) 3033087140 (monfri 2:30pm to 7:00pm cet) email : onlitgerman@hibbertco.com french phone : (+1) 3033087141 (monfri 2:00pm to 7:00pm cet) email : onlitfrench@hibbertco.com english phone : (+1) 3033087142 (monfri 12:00pm to 5:00pm gmt) email : onlit@hibbertco.com european tollfree access*: 0080044223781 *available from germany, france, italy, uk, ireland
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