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? 2002 microchip technology inc. ds21393b-page 1 m tc1426/TC1427/tc1428 features ?low cost latch-up protected: will withstand 500ma reverse output current esd protected 2kv high peak output current: 1.2a wide operating range - 4.5v to 16v high capacitive load drive capability: 1000pf in 38nsec low delay time: 75nsec max logic input threshold independent of supply voltage output voltage swing to within 25mv of ground or v dd low output impedance: 8 ? applications power mosfet drivers switched mode power supplies pulse transformer drive small motor controls print head drive device selection table package type general description the tc1426/TC1427/tc1428 are a family of 1.2a dual high-speed drivers. cmos fabrication is used for low power consumption and high efficiency. these devices are fabricated using an epitaxial layer to effectively short out the intrinsic parasitic transistor responsible for cmos latch-up. they incorporate a number of other design and process refinements to increase their long-term reliability. the tc1426 is compatible with the bipolar ds0026, but only draws 1/5 of the quiescent current. the tc1426/ TC1427/tc1428 are also compatible with the tc426/ tc427/tc428, but with 1.2a peak output current rather than the 1.5a of the tc426/tc427/tc428 devices. other compatible drivers are the tc4426/tc4427/ tc4428 and the tc4426a/tc4427a/tc4428a. the tc4426/tc4427/tc4428 have the added feature that the inputs can withstand negative voltage up to 5v with diode protection circuits. the tc4426a/tc4427a/ tc4428a have matched input to output leading edge and falling edge delays, t d1 and t d2 , for processing short duration pulses in the 25 nanoseconds range. all of the above drivers are pin compatible. the high-input impedance tc1426/TC1427/tc1428 drivers are cmos/ttl input-compatible, do not require the speed-up needed by the bipolar devices, and can be directly driven by most pwm ics. this family of devices is available in inverting and non- inverting versions. specifications have been optimized to achieve low-cost and high-performance devices, well-suited for the high-volume manufacturer. part number package temp. range tc1426coa 8-pin soic 0c to +70c tc1426cpa 8-pin pdip 0c to +70c TC1427coa 8-pin soic 0c to +70c TC1427cpa 8-pin pdip 0c to +70c tc1428coa 8-pin soic 0c to +70c tc1428cpa 8-pin pdip 0c to +70c tc1426cpa 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b v dd 2, 4 7, 5 inverting TC1427cpa 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b 2, 4 7, 5 noninverting tc1428cpa 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b 27 45 v dd v dd t c 142 6coa 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b v dd nc = no connection 2 , 4 7 , 5 inverting t c 1427 coa 1 2 3 4 nc 5 6 7 8 out a out b nc in a gnd in b 2 , 4 7 , 5 noninverting t c 142 8coa 1 4 nc 5 6 7 8 out a out b n c in b 2 7 45 v dd v dd 8-pin pdip/soic 1.2a dual high-speed mosfet drivers
tc1426/TC1427/tc1428 ds21393b-page 2 ? 2002 microchip technology inc. functional block diagram input v + 2.5ma 500 a note: tc1428 has one inverting and one noninverting driver. ground any unused driver input. inverting output noninverting output (tc1426) (TC1427) g n d tc1426 inverting TC1427 noninverting tc1428 inverting/noninverting
? 2002 microchip technology inc. ds21393b-page 3 tc1426/TC1427/tc1428 1.0 electrical characteristics absolute maximum ratings* supply voltage..................................................... +18v input voltage, any terminal ................................... v dd + 0.3v to gnd ? 0.3v power dissipation (t a 70 c) pdip ........................................................ 730mw soic........................................................ 470mw derating factor pdip ........................................................8mw/ c soic........................................................4mw/ c operating temperature range c version .........................................0 c to +70 c storage temperature range ............. -65 c to +150 c *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. tc1426/TC1427/tc1428 electrical specifications electrical characteristics: t a = +25 c, with 4.5v v dd 16v, unless otherwise noted. symbol parameter min typ max units test conditions input v ih logic 1, high input voltage 3 ?? 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 figure 3-1, figure 3-2 v ol low output voltage ?? 0.025 v figure 3-1, figure 3-2 r o output resistance ? ? 12 8 18 12 ? i out = 10ma, v dd = 16v i pk peak output current ? 1.2 ? a i rev latch-up current withstand reverse current ? >500 ? ma switching time (note 1) t r rise time ?? 35 nsec figure 3-1, figure 3-2 t f fall time ?? 25 nsec figure 3-1, figure 3-2 t d1 delay time ?? 75 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 ? ? ? ? 9 0.5 ma v in = 3v (both inputs) v in = 0v (both inputs) note 1: switching times ensured by design.
tc1426/TC1427/tc1428 ds21393b-page 4 ? 2002 microchip technology inc. tc1426/TC1427/tc1428 electrical specifications (continued) electrical characteristics: over operating temperature range with 4.5v v dd 16v, unless otherwise noted. symbol parameter min typ max units test conditions input v ih logic 1, high input voltage 3 ?? 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 figure 3-1, figure 3-2 v ol low output voltage ?? 0.025 v figure 3-1, figure 3-2 r o output resistance ? ? 15 10 23 18 ? i out = 10ma, v dd = 16v i rev latch-up current withstand reverse current ? >500 ? ma switching time (note 1) t r rise time ?? 60 nsec figure 3-1, figure 3-2 t f fall time ?? 40 nsec figure 3-1, figure 3-2 t d1 delay time ?? 125 nsec figure 3-1, figure 3-2 t d2 delay time ?? 125 nsec figure 3-1, figure 3-2 power supply i s power supply current ? ? ? ? 13 0.7 ma v in = 3v (both inputs) v in = 0v (both inputs) note 1: switching times ensured by design.
? 2002 microchip technology inc. ds21393b-page 5 tc1426/TC1427/tc1428 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) symbol description 1 nc no 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 output b, cmos totem-pole output. 6v dd supply input, 4.5v to 16v. 7 out a output a, cmos totem-pole output. 8 nc no connection.
tc1426/TC1427/tc1428 ds21393b-page 6 ? 2002 microchip technology inc. 3.0 applications information 3.1 supply bypassing large currents are required to charge and discharge capacitive loads quickly. for example, charging a 1000pf load to 16v in 25nsec requires a 0.8a current from the device ? s power supply. to guarantee low supply impedance over a wide frequency range, a parallel capacitor combination is recommended for supply bypassing. low-inductance ceramic mlc capacitors with short lead lengths (<0.5-in.) should be used. a 1.0 f film capacitor in parallel with one or two 0.1 f ceramic mlc capacitors normally provides adequate bypassing. 3.2 grounding the tc1426 and tc1428 contain inverting drivers. individual ground returns for the input and output circuits or a ground plane should be used. this will reduce negative feedback that causes degradation in switching speed characteristics. figure 3-1: inverting driver switching time 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 2.5ma current source load. with a logic "1" input, the maximum quiescent supply current is 9ma. logic "0" input level signals reduce quiescent current to 500 a maximum. unused driver inputs must be connected to v dd or gnd . minimum power dissipation occurs for logic "0" inputs for the tc1426/TC1427/tc1428. the drivers are designed with 100mv of hysteresis. this provides clean transitions and minimizes output stage current spiking when changing states. input voltage thresholds are approximately 1.5v, making a logic "1" input any voltage greater than 1.5v up to v dd . input current is less than 1 a over this range. the tc1426/TC1427/tc1428 may be directly driven by the tl494, sg1526/27, tc38c42, tc170 and similar switch-mode power supply integrated circuits. figure 3-2: noninverting driver switching time +5v 10% 90% 10% 90% 10% 90% v dd 1 t c 142 6 ( 1/2 tc1428 ) 1 2 test circuit 0 . 1 t c 142 7 ( 1/2 tc1428 ) +5v 0v 0v 90% test circuit 1 2
? 2002 microchip technology inc. ds21393b-page 7 tc1426/TC1427/tc1428 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. 550 440 330 220 110 0 579111315 time (nsec) v dd (v) 10,000pf 4700pf 2200pf rise time vs. supply voltage 330 264 198 132 66 0 time (nsec) 10,000pf 2200pf 4700pf 57 91113 15 fall time vs. supply voltage t d1 time (nsec) 5 7 9 11 13 15 80 70 60 50 40 30 delay time vs. supply voltage t a = +25 c t a = +25 c c l = 1000pf t a = +25 c v dd (v) v dd (v) t d2 40 32 24 16 8 0 25 45 65 85 105 125 temperature ( c) time (nsec) rise and fall times vs. temperature 60 54 48 42 36 0 25 45 65 85 105 125 temperature ( c) time (nsec) delay time vs. temperature 30 24 18 12 6 0 100 520 940 1360 1780 2200 supply current (ma) capacitive load (pf) 500khz 200khz 20khz supply current vs. capacitive load c l = 1000pf v dd = +15v t a = +25 c c l = 1000pf v dd = +15v c l = 1000pf v dd = +15v t d1 t d2 t fall t rise capacitive load (pf) 100 1000 10,000 1000 100 10 10 v dd time (nsec) 5 v dd 15 v dd rise time vs. capacitive load 1000 100 10 100 1000 10,000 capacitive load (pf) time (nsec) 5 v dd 10 v dd fall time vs. capacitive load 15 v dd 100 80 60 40 20 0 10 100 1000 10,000 v dd = 15v v dd = 10v v = 5v dd frequency (khz) supply current (ma) supply current vs. frequency c l = 1000pf t a = +25 c t a = +25 c t a = +25 c
tc1426/TC1427/tc1428 ds21393b-page 8 ? 2002 microchip technology inc. typical characteristics (continued) 100ma 50ma 10ma 15 13 11 9 7 5 579111315 out ? r ( ) low-state output resistance 50 42 34 26 18 10 579111315 100ma 50ma 10ma high-state output resistance r out ( ? ) 10 -8 a (sec) 10 -9 10 -10 4 6 8 1012141618 crossover energy loss t a = +25 c t a = +25 c v dd (v) v dd (v) v dd (v) 20 15 10 5 0 0 50 100 150 200 300 400 supply voltage (v) supply current ( a) quiescent power supply current vs. supply voltage both inputs logic "0" 20 15 10 5 0 1 234 56 supply voltage (v) supply current (ma) both inputs logic "1" quiescent power supply current vs. supply voltage 2 00 0 4 00 600 800 1 000 12 00 14 00 1 600 0 1 0 2 0 30 4 0 50 60 7 0 80 90 1 00 11 0 12 0 ambient temperature ( 8 pin di p thermal deratin g curve s 8 pin so i c
? 2002 microchip technology inc. ds21393b-page 9 tc1426/TC1427/tc1428 5.0 packaging information 5.1 package marking information package marking data not available at this time. 5.2 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 -p i n plast i c di p dimensions: inches (mm) .050 ( 1.27 ) typ . 8 8 -pin so i c dimensions: inches (mm)
tc1426/TC1427/tc1428 ds21393b-page 10 ? 2002 microchip technology inc. notes:
? 2002 microchip technology inc. ds21393b-page11 tc1426/TC1427/tc1428 sales and support data sheets products supported by a preliminary data sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. to determine if an errata sheet exists for a particular device, please contact one of the following: 1. your local microchip sales office 2. the microchip corporate literature center u.s. fax: (480) 792-7277 3. the microchip worldwide site (www.microchip.com) please specify which device, revision of silicon and data sheet (include literature #) you are using. new customer notification system register on our web site (www.microchip.com/cn) to receive the most current information on our products.
tc1426/TC1427/tc1428 ds21393b-page12 ? 2002 microchip technology inc. notes:
? 2002 microchip technology inc. ds21393b-page 13 tc1426/TC1427/tc1428 information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. no representation or warranty is given and no liability is assumed by microchip technology incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. use of microchip ? s products as critical com- ponents in life support systems is not authorized except with express written approval by microchip. no licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. trademarks the microchip name and logo, the microchip logo, filterlab, k ee l oq , microid, mplab, pic, picmicro, picmaster, picstart, pro mate, seeval and the embedded control solutions company are registered trademarks of microchip tech- nology incorporated in the u.s.a. and other countries. dspic, economonitor, fansense, flexrom, fuzzylab, in-circuit serial programming, icsp, icepic, microport, migratable memory, mpasm, mplib, mplink, mpsim, mxdev, picc, picdem, picdem.net, rfpic, select mode and total endurance are trademarks of microchip technology incorporated in the u.s.a. serialized quick turn programming (sqtp) is a service mark of microchip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2002, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. microchip received qs-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona in july 1999 and mountain view, california in march 2002. the company?s quality system processes and procedures are qs-9000 compliant for its picmicro ? 8-bit mcus, k ee l oq ? code hopping devices, serial eeproms, microperipherals, non-volatile memory and analog products. in addition, microchip ? s quality system for the design and manufacture of development systems is iso 9001 certified.
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