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  ? 2006 microchip technology inc. ds21415c-page 1 tc426/tc427/tc428 features: ? high-speed switching (c l = 1000 pf): 30 nsec ? high peak output current: 1.5a ? high output voltage swing: -v dd -25 mv - gnd +25 mv ? low input current (logic ?0? or ?1?): 1 a ? ttl/cmos input compatible ? available in inverting and noninverting configurations ? wide operating supply voltage: - 4.5v to 18v ? current consumption: - inputs low ? 0.4 ma - inputs high ? 8 ma ? single supply operation ? low output impedance: 6 ? pinout equivalent of ds0026 and mmh0026 ? latch-up resistant: withstands > 500 ma reverse current ? esd protected: 2 kv applications: ? switch mode power supplies ? pulse transformer drive ? clock line driver ? coax cable driver device selection table package type general description: the tc426/tc427/tc428 are dual cmos high-speed drivers. a ttl/cmos input voltage level is translated into a rail-to-rail output voltage level swing. the cmos output is within 25 mv of ground or positive supply. the low-impedance, high-current driver outputs swing a 1000 pf load 18v in 30 nsec. the unique current and voltage drive qualities make the tc426/tc427/tc428 ideal power mosfet drivers, line drivers, and dc-to- dc converter building blocks. input logic signals may equal the power supply voltage. input current is a low 1 a, making direct interface to cmos/bipolar switch-mode power supply control ics possible, as well as open-collector analog comparators. quiescent power supply current is 8 ma maximum. the tc426 requires 1/5 the current of the pin-compatible bipolar ds0026 device. this is important in dc-to-dc converter applications with power efficiency constraints and high-frequency switch-mode power supply applications. quiescent current is typically 6 ma when driving a 1000 pf load 18v at 100 khz. the inverting tc426 driver is pin-compatible with the bipolar ds0026 and mmh0026 devices. the tc427 is noninverting; the tc428 contains an inverting and non- inverting driver. other pin compatible driver families are the tc1426/ tc1427/tc1428, tc4426/tc4427/tc4428 and tc4426a/tc4427a/tc4428a. part number package configuration temp. range tc426coa tc426cpa tc426eoa tc426epa tc426ija tc426mja 8-pin soic 8-pin pdip 8-pin soic 8-pin pdip 8-pin cerdip 8-pin cerdip inverting inverting inverting inverting inverting inverting 0c to +70c 0c to +70c -40c to +85c -40c to +85c -25c to +85c -55c to +125c tc427coa tc427cpa tc427eoa tc427epa tc427ija tc427mja 8-pin soic 8-pin pdip 8-pin soic 8-pin pdip 8-pin cerdip 8-pin cerdip noninverting noninverting noninverting noninverting noninverting noninverting 0c to +70c 0c to +70c -40c to +85c -40c to +85c -25c to +85c -55c to +125c tc428coa tc428cpa tc428eoa tc428epa tc428ija tc428mja 8-pin soic 8-pin pdip 8-pin soic 8-pin pdip 8-pin cerdip 8-pin cerdip complementary complementary complementary complementary complementary complementary 0c to +70c 0c to +70c -40c to +85c -40c to +85c -25c to +85c -55c to +125c tc426 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b nc = no internal connection 2, 4 7, 5 inverting tc427 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b 2, 4 7, 5 noninverting tc428 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b 2 7 4 5 v dd complementary v dd v dd 8-pin pdip/soic/cerdip 1.5a dual high-speed power mosfet drivers
tc426/tc427/tc428 ds21415c-page 2 ? 2006 microchip technology inc. functional block diagram input v + 2.5 a 500 a note: tc428 has one inverting and one noninverting driver. ground any unused driver input. inverting output noninverting output (tc426) (tc427) gnd tc426 tc427 tc428
? 2006 microchip technology inc. ds21415c-page 3 tc426/tc427/tc428 1.0 electrical characteristics absolute maximum ratings* supply voltage ..................................................... +20v input voltage, any terminal ................................... v dd + 0.3v to gnd ? 0.3v power dissipation (t a 70c) pdip........................................................ 730 mw cerdip .................................................. 800 mw soic ....................................................... 470 mw derating factor pdip....................................................... 8 mw/c cerdip .............................................. 6.4 mw/c soic ...................................................... 4 mw/c operating temperature range c version ........................................ 0c to +70c i version ....................................... -25c to +85c e version...................................... -40c to +85c m version ................................... -55c to +125c storage temperature range.............. -65c to +150c *stresses above those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. tc426/tc427/tc428 elec trical specifications electrical characteristics: t a = +25c with 4.5v v dd 18v, unless otherwise noted. symbol parameter min typ max units test conditions input v ih logic 1, high input voltage 2.4 ? ? v v il logic 0, low input voltage ? ? 0.8 v i in input current -1 ? 1 a0v v in v dd output v oh high output voltage v dd ? 0.025 ? ? v v ol low output voltage ? ? 0.025 v r oh high output resistance ? 10 15 i out = 10 ma, v dd = 18v r ol low output resistance ? 6 10 i out = 10 ma, v dd = 18v i pk peak output current ? 1.5 ? a switching time (note 1) t r rise time ? ? 30 nsec figure 3-1, figure 3-2 t f fall time ? ? 30 nsec figure 3-1, figure 3-2 t d1 delay time ? ? 50 nsec figure 3-1, figure 3-2 t d2 delay time ? ? 75 nsec figure 3-1, figure 3-2 power supply i s power supply current ? ? ? ? 8 0.4 ma v in = 3v (both inputs) v in = 0v (both inputs) note 1: switching times ensured by design.
tc426/tc427/tc428 ds21415c-page 4 ? 2006 microchip technology inc. tc426/tc427/tc428 electrical specifications (continued) electrical characteristics: over operating temperature range with 4.5v v dd 18v, unless otherwise noted. input v ih logic 1, high input voltage 2.4 ? ? v v il logic 0, low input voltage ? ? 0.8 v i in input current -10 ? 10 a0v v in v dd output v oh high output voltage v dd ? 0.025 ? ? v v ol low output voltage ? ? 0.025 v r oh high output resistance ? 13 20 i out = 10 ma, v dd = 18v r ol low output resistance ? 8 15 i out = 10 ma, v dd = 18v switching time (note 1) t r rise time ? ? 60 nsec figure 3-1, figure 3-2 t f fall time ? ? 60 nsec figure 3-1, figure 3-2 t d1 delay time ? ? 75 nsec figure 3-1, figure 3-2 t d2 delay time ? ? 120 nsec figure 3-1, figure 3-2 power supply i s power supply current ? ? ? ? 12 0.6 ma v in = 3v (both inputs) v in = 0v (both inputs) note 1: switching times ensured by design.
? 2006 microchip technology inc. ds21415c-page 5 tc426/tc427/tc428 2.0 pin descriptions the descriptions of the pins are listed in table 2-1. table 2-1: pin function table pin no. (8-pin pdip, soic, cerdip) symbol description 1 nc no internal connection. 2 in a control input a, ttl/cmos compatible logic input. 3 gnd ground. 4 in b control input b, ttl/cmos compatible logic input. 5 out b cmos totem-pole output. 6v dd supply input, 4.5v to 18v. 7 out a cmos totem-pole output. 8 nc no internal connection.
tc426/tc427/tc428 ds21415c-page 6 ? 2006 microchip technology inc. 3.0 applications information 3.1 supply bypassing charging and discharging large capacitive loads quickly requires large currents. for example, charging a 1000 pf load to 18v in 25 nsec requires an 0.72a current from the device power supply. to ensure low supply impedance over a wide frequency range, a parallel capacitor combination is recom- mended for supply bypassing. low-inductance ceramic disk capacitors with short lead lengths (< 0.5 in.) should be used. a 1 f film capacitor in parallel with one or two 0.1 f ceramic disk capacitors normally provides adequate bypassing. 3.2 grounding the tc426 and tc428 contain inverting drivers. ground potential drops developed in common ground impedances from input to output will appear as negative feedback and degrade switching speed characteristics. individual ground returns for the input and output circuits or a ground plane should be used. 3.3 input stage the input voltage level changes the no-load or quiescent supply current. the n-channel mosfet input stage transistor drives a 2.5 ma current source load. with a logic ?1? input, the maximum quiescent supply current is 8 ma. logic ?0? input level signals reduce quiescent current to 0.4 ma maximum. minimum power dissipation occurs for logic ?0? inputs for the tc426/tc427/tc428. unused driver inputs must be connected to v dd or gnd . the drivers are designed with 100 mv of hysteresis. this provides clean transitions and minimizes output stage current spiking when changing states. input voltage thresholds are approximately 1.5v, making the device ttl compatible over the 4.5v to 18v supply operating range. input current is less than 1 a over this range. the tc426/tc427/tc428 may be directly driven by the tl494, sg1526/1527, sg1524, se5560, and similar switch-mode power supply integrated circuits. 3.4 power dissipation the supply current vs frequency and supply current vs capacitive load characteristic curves will aid in determining power dissipation calculations. the tc426/tc427/tc428 cmos drivers have greatly reduced quiescent dc power consumption. maximum quiescent current is 8 ma compared to the ds0026 40 ma specification. for a 15v supply, power dissipation is typically 40 mw. two other power dissipation components are: ? output stage ac and dc load power. ? transition state power. output stage power is: po = p dc + pac = vo (i dc ) + f c l v s 2 where: vo = dc output voltage i dc = dc output load current f = switching frequency vs = supply voltage in power mosfet drive applications the p dc term is negligible. mosfet power transistors are high-imped- ance, capacitive input devices. in applications where resistive loads or relays are driven, the p dc component will normally dominate. the magnitude of p ac is readily estimated for several cases: a. b. 1. f = 200 khz 1. f = 200 khz 2. c l =1000 pf 2. c l =1000 pf 3. vs = 18v 3. vs = 15v 4. p ac = 65 mw 4. p ac = 45 mw during output level state changes, a current surge will flow through the series connected n and p channel output mosfets as one device is turning ?on? while the other is turning ?off?. the current spike flows only during output transitions. the input levels should not be maintained between the logic ?0? and logic ?1? levels. unused driver inputs must be tied to ground and not be allowed to float. average power dissipation will be reduced by minimizing input rise times. as shown in the characteristic curves, average supply current is frequency dependent.
? 2006 microchip technology inc. ds21415c-page 7 tc426/tc427/tc428 figure 3-1: inverting driver switching time test circuit figure 3-2: noninverting driver switching time test circuit figure 3-3: voltage doubler figure 3-4: voltage inverter output input 0.1 f v dd = 18v +5v input 10% 90% 10% 90% 10% 90% 18v output t d1 t f t r t d2 c l = 1000 pf 1 f 0v 0v tc426 (1/2 tc428) 1 2 input: 100 khz, square wave, t rise = t fall 10 nsec output input 90% 10% 10% 10% 90% tc427 (1/2 tc428) +5v input 18v output 0v 0v 90% 1 2 0.1 f 1 f t d1 t f t r t d2 v dd = 18v c l = 1000 pf input: 100 khz, square wave, t rise = t fall 10 nsec +15v 0.1 f 4.7 f 10 f 47 f + C + C + C 1n4001 1n4001 v out f in = 10 khz 2 6 3 7 29. 27. 25. 23. 0 10 20 30 40 50 60 70 80 90 i out (ma) 28. 26. 24. 22. 30. 100 v out (v) 1/2 tc426 +15v 0.1 f 4.7 f 10 f 47 f + C +C 1n4001 1n4001 2 6 3 7 1/2 tc426 +C -6 -8 -10 -12 0 10 20 30 40 50 60 70 80 90 -7 -9 -11 -13 -5 -14 100 i out (ma) v out (v) v out f in = 10 khz
tc426/tc427/tc428 ds21415c-page 8 ? 2006 microchip technology inc. 4.0 typical characteristics note: the graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. the performance characteristics listed herein are not tested or guaranteed. in some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. 30 20 10 0 -25 0 25 150 time (ns) rise and fall times vs. temperature 40 50 75 100 125 temperature (c) 35 25 15 80 70 60 50 30 0 delay time (ns) delay times vs. supply voltage 40 90 supply voltage (v) 5101520 t d2 60 50 40 30 10 05 10 15 20 time (ns) supply voltage (v) 70 t r t f c l = 1000 pf t a = +25c rise and fall times vs. supply voltage 20 c l = 1000 pf t a = +25c c l = 1000 pf v dd = 18v t r t f t d1 100 1 10 1000 10k time (ns) capacitive load (pf) rise and fall times vs. capacitive load 10 1k 100 90 80 70 60 40 30 0 -25 50 100 150 delay time (ns) temperature (c) delay times vs. temperature 50 100 25 75 125 70 60 50 40 20 0 10 supply current (ma) supply current vs. capacitive load 30 80 400 khz 200 khz 20 khz 100 1000 10k capacitive load (pf) 10 c l = 1000 pf v dd = 18v t d2 t d1 t a = +25c v dd = 18v t a = +25c v dd = 18v t r t f 0.96 0.72 0.48 0.24 0 10 output voltage (v) low output vs. voltage 1.20 20 30 40 50 60 70 80 90 100 current sunk (ma) 10v 15v 1.76 1.32 0.88 0.44 0 10 high output vs. voltage 2.20 20 30 40 50 60 70 80 90 100 current sourced (ma) 18v v dd ? v out (v) ?? 13v 20 10 0 1 supply current (ma) supply current vs. frequency 30 10 100 1000 frequency (khz) 10v 5v t a = +25c v dd = 5v v dd = 8v v dd = 18v c l = 1000 pf t a = +25c t a = +25c
? 2006 microchip technology inc. ds21415c-page 9 tc426/tc427/tc428 typical characteristics (continued) 0 20 15 10 5 0 supply voltage (v) 50 100 150 200 250 300 supply current (ma) supply voltage vs. quiescent supply current no load both inputs logic 0 t a = +25c 123456 20 15 10 5 0 supply voltage (v) supply current (ma) supply voltage vs. quiescent supply current no load both inputs logic 1 t a = +25c 200 0 400 600 800 1000 1200 1400 1600 0 10 20 30 40 50 60 70 80 90 100 110 120 ambient temperature (c) max. power (mw) 8-pin dip 8-pin cerdip 8-pin soic thermal derating curves
tc426/tc427/tc428 ds21415c-page 10 ? 2006 microchip technology inc. 5.0 packaging information 5.1 package marking information package marking data not available at this time. 5.2 taping form component taping orientation for 8-pin msop devices package carrier width (w) pitch (p) part per full reel reel size 8-pin msop 12 mm 8 mm 2500 13 in carrier tape, number of components per reel and reel size pin 1 user direction of feed standard reel component orientation for 713 suffix device w p component taping orientation for 8-pin soic (narrow) devices package carrier width (w) pitch (p) part per full reel reel size 8-pin soic (n) 12 mm 8 mm 2500 13 in carrier tape, number of components per reel and reel size standard reel component orientation for 713 suffix device pin 1 user direction of feed p w
? 2006 microchip technology inc. ds21415c-page 11 tc426/tc427/tc428 5.3 package dimensions 3 min. pin 1 .260 (6.60) .240 (6.10) .045 (1.14) .030 (0.76) .070 (1.78) .040 (1.02) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) .022 (0.56) .015 (0.38) .040 (1.02) .020 (0.51) .015 (0.38) .008 (0.20) .310 (7.87) .290 (7.37) .400 (10.16) .310 (7.87) 8-pin plastic dip dimensions: inches (mm) .400 (10.16) .370 (9.40) .300 (7.62) .230 (5.84) .065 (1.65) .045 (1.14) .055 (1.40) max. .020 (0.51) min. pin 1 .200 (5.08) .160 (4.06) .200 (5.08) .125 (3.18) .110 (2.79) .090 (2.29) .020 (0.51) .016 (0.41) .040 (1.02) .020 (0.51) .320 (8.13) .290 (7.37) .150 (3.81) min. 3 min. 8-pin cerdip (narrow) .015 (0.38) .008 (0.20) .400 (10.16) .320 (8.13) dimensions: inches (mm)
tc426/tc427/tc428 ds21415c-page 12 ? 2006 microchip technology inc. package dimensions (continued) .050 (1.27) typ. 8 max. pin 1 .244 (6.20) .228 (5.79) .157 (3.99) .150 (3.81) .197 (5.00) .189 (4.80) .020 (0.51) .013 (0.33) .010 (0.25) .004 (0.10) .069 (1.75) .053 (1.35) .010 (0.25) .007 (0.18) .050 (1.27) .016 (0.40) 8-pin soic dimensions: inches (mm)
? 2006 microchip technology inc. ds21415c-page 13 tc426/tc427/tc428 the microchip web site microchip provides online support via our www site at www.microchip.com. this web site is used as a means to make files and information easily available to customers. accessible by using your favorite internet browser, the web site contains the following information: ? product support ? data sheets and errata, application notes and sample programs, design resources, user?s guides and hardware support documents, latest software releases and archived software ? general technical support ? frequently asked questions (faq), technical support requests, online discussion groups, microchip consultant program member listing ? business of microchip ? product selector and ordering guides, latest microchip press releases, listing of seminars and events, listings of microchip sales offices, distributors and factory representatives customer change notification service microchip?s customer notification service helps keep customers current on microchip products. subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata related to a specified product family or development tool of interest. to register, access the microchip web site at www.microchip.com, click on customer change notification and follow the registration instructions. customer support users of microchip products can receive assistance through several channels: ? distributor or representative ? local sales office ? field application engineer (fae) ? technical support ? development systems information line customers should contact their distributor, representative or field application engineer (fae) for support. local sales offices are also available to help customers. a listing of sales offices and locations is included in the back of this document. technical support is available through the web site at: http://support.microchip.com
tc426/tc427/tc428 ds21415c-page 14 ? 2006 microchip technology inc. reader response it is our intention to provide you with the best documentation possible to ensure successful use of your microchip prod- uct. if you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please fax your comments to the technical publications manager at (480) 792-4150. please list the following information, and use this outline to provide us with your comments about this document. to : technical publications manager re: reader response total pages sent ________ from: name company address city / state / zip / country telephone: (_______) _________ - _________ application (optional): would you like a reply? y n device: literature number: questions: fax: (______) _________ - _________ ds21415c tc426/tc427/tc428 1. what are the best features of this document? 2. how does this document meet your hardware and software development needs? 3. do you find the organization of this document easy to follow? if not, why? 4. what additions to the document do you think would enhance the structure and subject? 5. what deletions from the document could be made without affecting the overall usefulness? 6. is there any incorrect or misleading information (what and where)? 7. how would you improve this document?
? 2006 microchip technology inc. ds21415c-page 15 information contained in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. microchip makes no representations or warranties of any kind whether express or implied, written or oral, statutory or otherwise, related to the information, including but not limited to its condition, quality, performance, merchantability or fitness for purpose . microchip disclaims all liability arising from this information and its use. use of microchip devices in life support and/or safety applications is entirely at the buyer?s risk, and the buyer agrees to defend, indemnify and hold harmless microchip from any and all damages, claims, suits, or expenses resulting from such use. no licenses are conveyed, implicitly or otherwise, under any microchip intellectual property rights. trademarks the microchip name and logo, the microchip logo, accuron, dspic, k ee l oq , micro id , mplab, pic, picmicro, picstart, pro mate, powersmart, rfpic, and smartshunt are registered trademarks of micr ochip technology incorporated in the u.s.a. and other countries. amplab, filterlab, migratable memory, mxdev, mxlab, seeval, smartsensor and the embedded control solutions company are registered trademarks of microchip technology incorporated in the u.s.a. analog-for-the-digital age, app lication maestro, dspicdem, dspicdem.net, dspicworks, ecan, economonitor, fansense, flexrom, fuzzylab, in-circuit serial programming, icsp, icepic, linear active thermistor, mindi, miwi, mpasm, mplib, mplink, pickit, picdem, picdem.net, piclab, pictail, powercal, powerinfo, powermate, powertool, real ice, rflab, rfpicdem, select mode, smart serial, smarttel, total endurance, uni/o, wiperlock and zena are tr ademarks of microchip technology incorporated in the u.s.a. and other countries. sqtp is a service mark of mi crochip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2006, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. note the following details of the code protection feature on microchip devices: ? microchip products meet the specification cont ained in their particular microchip data sheet. ? microchip believes that its family of products is one of the most secure families of its kind on the market today, when used i n the intended manner and under normal conditions. ? there are dishonest and possibly illegal methods used to breach the code protection feature. all of these methods, to our knowledge, require using the microchip produc ts in a manner outside the operating specif ications contained in microchip?s data sheets. most likely, the person doing so is engaged in theft of intellectual property. ? microchip is willing to work with the customer who is concerned about the integrity of their code. ? neither microchip nor any other semiconduc tor manufacturer can guarantee the security of their code. code protection does not mean that we are guaranteeing the product as ?unbreakable.? code protection is constantly evolving. we at microchip are co mmitted to continuously improvin g the code protection features of our products. attempts to break microchip?s code protection feature may be a violation of the digital millennium copyright act. if such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that act. microchip received iso/ts-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona, gresham, oregon and mountain view, california. the company?s quality system processes and procedures are for its picmicro ? 8-bit mcus, k ee l oq ? code hopping devices, serial eeproms, microperipherals, nonvolatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001:2000 certified.
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