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1 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn high speed, +3.3v quad rs-422 differential line driver quad differential line drivers compatible with the eia standard for rs-422 serial protocol high-z output control at least 60mbps transmission rates 11ns typical driver propagation delays less than 1ns typical output skew single +3.3v supply operation common driver enable control compatibility with the industry standard 26lv31 ideal for use with sp26lv431, quad receivers enable enable di 4 di 3 di 2 di 1 do 4 a do 4 b do 3 a do 3 b do 2 a do 2 b do 1 a do 1 b v cc gnd inputs outputs sp26lv431 the sp26lv431 is a quad differential line driver that meets the specifications of the eia standard rs-422 serial protocol. the sp26lv431 features sipex's bicmos process allowing low power operational characteristics of cmos technology while meeting all of the demands of the rs-422 serial protocol over 60mbps under load. the rs-422 protocol allows up to 10 receivers to be connected to a multipoint bus transmission line. the sp26lv431 features a driver enable control common to all four drivers that places the output pins in a high impedance state. since the cabling can be as long as 4,000 feet, the rs-422 drivers of the sp26lv431 are equipped with a wide common-mode output voltage range to accommodate ground potential differences. description v cc di 2 1 2 3 4 13 14 5 6 7 d0 3 a d0 1 a d0 1 b enable d0 2 b d0 2 a d0 3 b di 1 enable d0 4 b d0 4 a di 4 8 9 gnd di 3 10 12 11 15 16 sp26lv431 typical application circuit e l b a n ee l b a n et u p n i - n o n g n i t r e v n i t u p t u o a g n i t r e v n i t u p t u o b w o lh g i he r a c t ' n o dz - h g i hz - h g i h h g i he r a c t ' n o dw o lw o lh g i h e r a c t ' n o dw o lh g i hh g i hw o l features now available in lead free packaging
2 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn s r e t e m a r a p c d. n i m. p y t. x a ms t i n us n o i t i d n o c , e g a t l o v y l p p u sv c c 0 . 36 . 3v , e g a t l o v t u p t u o r o t u p n i c dv n i v r o t u o v c c v s c i t s i r e t c a r a h c l a c i r t c e l e t u p n i t , s e m i t l l a f r o e s i r t u p n i r t r o f 3s n v , e g a t l o v t u p n i l e v e l h g i h h i 0 . 2v v , e g a t l o v t u p n i l e v e l w o l l i 8 . 0v s c i t s i r e t c a r a h c l a c i r t c e l e t u p t u o v , e g a t l o v t u p t u o l e v e l h g i h h o 5 . 29 . 2vv n i v = h i v r o l i i , t u o a m 0 2 - = v , e g a t l o v t u p t u o l e v e l w o l l o 2 . 05 . 0vv n i v = h i v r o l i i , t u o a m 0 2 = v , e g a t l o v t u p t u o l a i t n e r e f f i d t 0 . 27 . 2vr l 0 0 1 = ? 1 e t o n , v | , t u p t u o l a i t n e r e f f i d n i e c n e r e f f i d t v | - | t |4 . 0vr l 0 0 1 = ? 1 e t o n , v , e g a t l o v t u p t u o e d o m n o m m o c s o 0 . 3vr l 0 0 1 = ? 1 e t o n , v | , t u p t u o e d o m n o m m o c n i e c n e r e f f i d s o v - s o |4 . 0vr l 0 0 1 = ? 1 e t o n , t n e r r u c y l p p u s t n e c s e i u q i c c 0 0 1 av n i v = c c 2 e t o n , d n g r o , t n e r r u c e g a k a e l t u p t u o e t a t s - i r ti z o 0 . 2 av t u o v = c c , d n g r o v = e l b a n e l i , v = e l b a n e h i i , t n e r r u c t i u c r i c t r o h s t u p t u o c s 0 3 -0 5 1 -a mv n i v = c c 3 d n a 1 s e t o n , d n g r o f f o r e w o p t n e r r u c e g a k a e l t u p t u o i f f o 0 0 1 av c c v , v 0 = t u o 1 e t o n , v 6 = i f f o 0 0 1 - av c c v , v 0 = t u o 1 e t o n , v 5 2 . 0 - = electrical characteristics unless otherwise noted, the following specifications apply for v cc = +3.0v to +3.6v with t amb = 25 c and all min and max limits apply across the recommended operating temperature range. absolute maximum ratings v cc ........................................................................................0.5v to 7.0v v in (dc input voltage).............................................-1.5v to (v cc + 1.5v) v out (dc output voltage)......................................................-0.5v to 7v i ik , i ok (clamp diode current)........................................................ 20ma i out (dc output current, per pin)................................................ 150ma i cc (dc v cc or gnd current, per pin).......................................... 150ma t stg (storage temperature range)...............................-65 c to +150 c storage temperature....................................................-65 c to +150 c power dissipation per package 16-pin pdip (derate 14.3mw/ o c above +70 o c).........................1150mw 16-pin nsoic (derate 13.6mw/ o c above +70 o c)......................1100mw these are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliability and cause permanent damage to the device.
3 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn figure 1. sp431 block diagram enable enable di 4 di 3 di 2 di 1 do 4 a do 4 b do 3 a do 3 b do 2 a do 2 b do 1 a do 1 b v cc gnd inputs outputs electrical charactaristics unless otherwise noted, the following specifications apply for v cc = +3.0v to +3.6v, t amb = 25 c, t r < 6ns, t f < 6ns, and all min and max limits apply across the recommended operating temperature range. s r e t e m a r a p. n i m. p y t. x a ms t i n us n o i t i d n o c s c i t s i r e t c a r a h c g n i h c t i w s t , s y a l e d n o i t a g a p o r p d h l p t , d l h p 1 1 8 1 s n3 e r u g i f w e k s8 . 02 s n4 e t o n , 3 e r u g i f t , s e m i t l l a f d n a e s i r t u p u o l a i t n e r e f f i d h l t t , l h p 40 1s n3 e r u g i f t , e m i t e l b a n e t u p t u o h z p 0 4s n5 e r u g i f t , e m i t e l b a n e t u p t u o l z p 0 4 s n5 e r u g i f t , e m i t e l b a s i d t u p t u o z h p 5 3s n5 e t o n , 5 e r u g i f t , e m i t e l b a s i d t u p t u o z l p 5 3s n5 e t o n , 5 e r u g i f c , e c n a t i c a p a c n o i t a p i s s i d r e w o p d p 0 5f p6 e t o n c , e c n a t i c a p a c t u p n i n i 6f p note 1: refer to eia specifications for rs-422 serial protocol for exact test conditions. note 2: measured per input. all other inputs at v cc or gnd. note 3: this is the current sourced when a high output is shorted to gnd. only one output at a time should be shorted. note 4: skew is defined as the difference in propagation delays between complementary outputs at the 50% input. note 5: output disable time is the delay from enable or enable being switched to the output transistors turning off. the actual disable times are less than indicated due to the delay added by the rc time constant of the load. note 6: c pd determines the no load dynamic power consumption, p d = (c pd v cc 2 f) + (i cc v cc ), and the no load dynamic current consumption, i s = (c pd v cc f) + i cc .
4 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn figure 4. driver single-ended tri-state test circuit figure 5. driver single-ended tri-state waveforms figure 2. ac test circuit figure 3. propagation delays ac test circuits and switching time waveforms d generator driver enabled di x 50 ? cl cl cl rl d0 x a d0 x b figure 6. differential rise and fall times t tlh t thl 3.0v 0.0v input output (differential) 10% 90% 90% 10% input pulse: f = 1mhz, 50% t r < 6ns t f < 6ns f=1 mhz t r < 10ns, t f < 10ns 1.5v 1.5v t plhd t phld driver input di x differential output 20% 20% 0v 0v t tlh t thl 80% 80% v diff = v a - v b 0v (differential) 0v 3v gnd v oh v ol driver d0 x b driver d0 x a v cc s1 enable d0 x a s2 d0 x b cl 110 ? t est poin t s3 v cc if enable is the selected input, then enable = high if enable is the selected input, then enable = low to force the driver outputs into high-z, enable = low enable = high enable enable 1.5v 3v 1.5v 0v t phz t plz v ol + 0.3v t pzh 1.3v v oh gnd t pzl v cc v ol 1.3v input = enable or enable s1= v cc s2 = d0 x a s3 = gnd and/or s1 = gnd s2 = d0 x b s3 = gnd input = enable or enable s1= gnd s2 = d0 x b s3 = v cc and/or s1 = v cc s2 = d0 x a s3 = v cc v oh = 0.3v enable
5 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn the sp26lv431 is a low-power quad differen- tial line driver designed for digital data transmis- sion meeting the specifications of the eia stan- dard rs-422 serial protocol. the sp26lv431 features sipex's bicmos process allowing low power operational characteristics of cmos tech- nology while meeting all of the demands of the rs-422 serial protocol up to 60mbps under load in harsh environments. the rs-422 standard is ideal for multi-drop applications and for long-distance communica- tion. the rs-422 protocol allows up to 10 receivers to be connected to a data bus, making it an ideal choice for multi-drop applications. since the cabling can be as long as 4,000 feet, rs-422 drivers are equipped with a wide com- mon mode output range to accommodate ground potential differences. because the rs-422 is a differential interface, data is virtually immune to noise in the transmission line. the sp26lv431 accepts ttl or cmos input levels and translates these to rs-422 output levels. the sp26lv431 features active high and active low driver enable controls common to all four driver channels see figure 8. a logic high on the enable pin (pin 4) or a logic low on the enable pin (pin 12) will enable the differential driver outputs. a logic low on the enable pin (pin 4) and a logic high on the enable pin (pin 12) will force the driver outputs into high impedance (high-z). refer to the truth table in figure 8 . figure 7. two-wire balanced system, rs-422 *r t enable enable d ata d ata output *r t is optional although highly recommended to reduce reflection. the rs-422 line driver outputs feature high source and sink current capability. all drivers are internally protected against short circuits on their outputs. the driver outputs are short-circuit limited to 150ma. the driver output skew times are typically 0.8ns. to minimize reflections, the multipoint bus transmission line should be terminated at both ends in its characteristic impedance, and stub lengths off the main line should be kept as short as possible. figure 8. truth table, enable / disable function common to all four rs-422 drivers e l b a n ee l b a n et u p n i - n o n g n i t r e v n i t u p t u o a g n i t r e v n i t u p t u o b w o lh g i he r a c t ' n o dz - h g i hz - h g i h h g i he r a c t ' n o dw o lw o lh g i h e r a c t ' n o dw o lh g i hh g i hw o l theory of operation
6 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn figure 10. differential propagation delay vs voltage figure 11. differential skew vs temperature figure 12. differential skew vs voltage figure 13. differential transition time vs temperature figure 14. differential transition time vs voltage figure 9. differential propagation delay vs temperature 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0 12.5 -40 -15 10 35 60 85 tem p erature ( c ) differential prop. delay (ns) t phld v cc = 3.0v t phld 9.0 9.5 10.0 10.5 11.0 11.5 12.0 3.0 3.1 3.2 3.3 3.4 3.5 3.6 power su pp l y vo lta g e ( v ) differential prop. delay (ns) t phld t phld 0.25 0.35 0.45 0.55 0.65 0.75 0.85 0.95 1.05 1.15 1.25 -40 -15 10 35 60 85 tem p erature ( c ) differential skew (ns) v cc = 3.3v 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 3.0 3.1 3.2 3.3 3.4 3.5 3.6 power su pp l y v olta g e ( v ) differential skew (ns) 2 3 4 5 6 7 8 -40 -15 10 35 60 85 tem p erature ( c ) differential transition time (ns) t thl t tlh v cc = 3.3v 2.0 2.5 3.0 3.5 4.0 4.5 5.0 3.0 3.1 3.2 3.3 3.4 3.5 3.6 power su pp l y vo lta g e ( v ) differential transition time (ns) t thl t tlh
7 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn figure 15. complementary skew vs temperature figure 16. complementary skew vs voltage figure 17. differential v out vs i out (temperature) figure 18. differential v out vs i out (v cc ) figure 19. v out high vs i out (temperature) figure 20. v out high vs i out (v cc ) 0.2 0.4 0.6 0.8 1.0 1.2 -40 -15 10 35 60 85 tem p erature ( c ) complementary skew (ns) v cc = 3.3v 1.5 1.7 1.9 2.1 2.3 2.5 2.7 2.9 3.1 3.3 015304560 out p ut current ( ma ) differential output voltage (v) t= -40 c t= +85 c t=+25 c v cc = 3.3v 1.2 1.6 2.0 2.4 2.8 3.2 3.6 013 4 6 out p ut current ( ma ) differential output voltage (v) v cc = 3.6v v cc = 3.0v v cc = 3.3v 2.1 2.3 2.5 2.7 2.9 3.1 3.3 013 46 out p ut hi g h current ( ma ) output high voltage (v) t= -40 c t= +85 c t=+25 c v cc = 3.3v 1.2 1.6 2.0 2.4 2.8 3.2 3.6 0 134 6 out p ut hi g h current ( ma ) output high voltage (v) v cc = 3.6v v cc = 3.0v v cc = 3.3v 0.50 0.55 0.60 0.65 0.70 0.75 0.80 3.0 3.1 3.2 3.3 3.4 3.5 3.6 power su pp l y vo lta g e ( v ) complementary skew (ns)
8 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn figure 22. v out low vs current (v cc ) figure 23. supply current vs temperature figure 24. supply current vs voltage figure 25. supply current vs data rate figure 26. i cc (loaded) vs data rate figure 21. v out low vs current (temperature) 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 01 3 4 6 out p ut low current ( ma ) output low voltage (v) t= -40 c t= +85 c t=+25 v cc = 3.3v 0.0 0.1 0.2 0.3 0.4 0.5 0.6 01 3 46 out p ut low current ( ma ) output low voltage (v) v cc = 3.6v v cc = 3.0v v cc = 3.3v 0.0 0.5 1.0 1.5 2.0 2.5 -40 -15 10 35 60 85 tem p erature ( c ) supply current ( a) v cc = 3.0v d in = 3.0v 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 3.0 3.1 3.2 3.3 3.4 3.5 3.6 power su pp l y vo lta g e ( v ) supply current (ua) 0 10 20 30 40 50 11 0 100 1,000 10,000 100,000 data rate ( kbaud ) no load supply current (ma) v cc = 3.0v 90 92 94 96 98 100 102 104 11 0 100 1,000 10,000 100,000 data rate ( kbaud ) no load supply current (ma) v cc = 3.0v
9 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn figure 28. short circuit current vs voltage figure 27. short circuit current vs temperature 36 38 40 42 44 46 48 50 -40 -15 10 35 60 85 tem p erature ( c ) output short circuit current (ma) vcc=3.0v 40 45 50 55 60 65 3.0 3.1 3.2 3.3 3.4 3.5 3.6 power su pp l y vo lta g e ( v ) output short circuit current (ma)
10 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn pinout pin assignments pin number pin name description 1 di 1 driver 1 ttl input. 2 d0 1 a non-inverted driver output. 3 d0 1 b inverted driver output. 4 enable driver output enable, active high. 5 d0 2 b inverted driver output. 6 d0 2 a non-inverted driver output. 7 di 2 driver 2 ttl input. 8 gnd ground. 9 di 3 driver 3 ttl input. 10 d0 3 a non-inverted driver output. 11 d0 3 b inverted driver output. 12 enable driver output enable, active low. 13 d0 4 b inverted driver output. 14 d0 4 a non-inverted driver output. 15 di 4 driver 4 ttl input. 16 v cc +3.0v to +3.6v power supply. v cc di 2 1 2 3 4 13 14 5 6 7 d0 3 a d0 1 a d0 1 b enable d0 2 b d0 2 a d0 3 b di 1 enable d0 4 b d0 4 a di 4 8 9 gnd di 3 10 12 11 15 16 sp26lv431 pin description
11 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn package: 16 pin pdip ea eb e d1 d l a1 b b2 e b3 n 1 23 index area n/2 e e1 c b symbol min nom max a--0 .21 a1 0.15 - - a2 0.115 0.13 0.195 b0. 014 0.018 0.022 b2 0.045 0.06 0.07 b3 0.3 0.039 0.045 c0. 008 0.01 0.014 d0. 735 0.75 0.755 d1 0.005 - - e0.30. 31 0.325 e1 0.24 0.25 0.28 e ea eb - - 0.43 l0. 115 0.13 0.15 note: dimensions in (mm) .100 bsc .300 bsc 16 pin pdip jedec ms-001 (bb) variation a a2 c
12 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn package: 16 pin nsoic to p view b gauge plane l1 l 1 seating plane l2 view c a a1 a2 see view c b b section b-b with plating c base metal b symbol min nom max a1.35- 1.75 a1 0.1 - 0.25 a2 1.25 - 1.65 b0.31- 0.51 c0.17- 0.25 d e e1 e l0.4-1 .27 l1 l2 ?0o-8o ?1 5o - 15o note: dimensions in (mm) 1.27 bsc 1.04 ref 0.25 bsc 16 pin nsoic jedec mo-012 (ac) variation 9.90 bsc 6.00 bsc 3.90 bsc e e/2 e1 index area (d/2 x e1/2) e1/2 d 1 e side view seating plane
13 date: 2/24/05 sp26lv431 high speed, +3.3v quad rs-422 differential line driver ?copyright 2005 sipex corporationn ordering information model .................................................................................... temperature range ..................................................................................... package sp26lv431cp ............................................................................. 0 c to +70 c ........................................................................... 16?in plastic dip SP26LV431CN ............................................................................ 0 c to +70 c .......................................................................... 16?in narrow soic SP26LV431CN/tr ...................................................................... 0 c to +70 c .......................................................................... 16?in narrow soic corporation analog excellence sipex corporation reserves the right to make changes to any products described herein. sipex does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor t he rights of others. sipex corporation headquarters and sales office 233 south hillview drive milpitas, ca 95035 tel: (408) 934-7500 fax: (408) 935-7600 sales office 22 linnell circle billerica, ma 01821 tel: (978) 667-8700 fax: (978) 670-9001 e-mail: sales@sipex.com date revision description 3/08/04 a production release. 2/24/05 b include tape and reel p/n's. revision history available in lead free packaging. to order add "-l" suffix to part number. example: SP26LV431CN/tr = standard; SP26LV431CN-l/tr = lead free /tr = tape and reel pack quantity is 2500 for nsoic. click here to order samples

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