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1. general description the hef4794b is an 8-stage serial shift re gister. it has a storage latch associated with each stage for strobing data from the serial input (d) to the parallel led driver outputs (qp0 to qp7). data is shifte d on the positive-going clock (cp) transitions. the data in each shift register stage is transferred to the storage register when the strobe input (str) is high. data in the storage register appear s at the outputs whenever the output enable input (oe) signal is high. two serial outputs (qs1 and qs2) are available for cascading a number of hef4794b devices. serial data is available at qs1 on positive-going clock edges to allow high-speed operation in cascaded systems with a fast clock rise time. the same serial data is available at qs2 on the next negative goin g clock edge. this is used for cascading hef4794b devices when the clock has a slow rise time. it operates over a recommended v dd power supply range of 3 v to 15 v referenced to v ss (usually ground). unused inputs must be connected to v dd , v ss , or another input. 2. features and benefits ? fully static operation ? 5 v, 10 v, and 15 v parametric ratings ? standardized symmetrical output characteristics ? specified from ? 40 ? c to +85 ? c and ? 40 ? c to +125 ? c ? complies with jedec standard jesd 13-b 3. ordering information hef4794b 8-stage shift-and-store register led driver rev. 7 ? 16 november 2011 product data sheet table 1. ordering information all types operate from ? 40 ? c to +125 ? c. type number package name description version hef4794bp dip16 plastic dual in-line package; 16 leads (300 mil) sot38-4 hef4794bt so16 plastic small outline pack age; 16 leads; body width 3.9 mm sot109-1
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 2 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 4. functional diagram fig 1. logic symbol fig 2. functional diagram 15 2 oe d cp str 31 qp0 qp1 qp2 qp3 qp4 qp5 qp6 qp7 qs1 qs2 9 10 4 5 6 7 14 13 12 11 001aaf111 001aag798 8-stage shift register 8-bit storage register open-drain outputs 4 qp0 5 qp1 6 qp2 7 qp3 14 qp4 13 qp5 12 qp6 11 qp7 10 qs2 9 qs1 d 2 cp 3 str 1 oe 15 fig 3. logic diagram 001aag799 d d cp cp q ff 0 d le q latch 0 d cp q ff 7 d le q latch 7 d cp q stages 1 to 6 stage 0 stage 7 qp2 qp0 d qs2 qs1 le q latch qp1 qp4 qp3 qp6 qp5 qp7 str oe
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 3 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 5. pinning information 5.1 pinning 5.2 pin description fig 4. pin configuration hef4794b str v dd do e cp qp4 qp0 qp5 qp1 qp6 qp2 qp7 qp3 qs2 v ss qs1 001aag800 1 2 3 4 5 6 7 8 10 9 12 11 14 13 16 15 table 2. pin description symbol pin description d 2 serial input qp0 to qp7 4, 5, 6, 7, 14, 13, 12, 11 parallel output qs1 9 serial output qs2 10 serial output cp 3 clock input str 1 strobe input oe 15 output enable input v dd 16 supply voltage v ss 8 ground (0 v)
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 4 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 6. functional description [1] h = high voltage level; l = low voltage level; x = don?t care; z = high-impedance off-state; ? = low-to-high clock transition; ? = high-to-low clock transition. [2] q6s = the data in register stage 6 before the low to high clock transition. [3] q7s = the data in register stage 7 before the high to low clock transition. table 3. function table [1] input parallel output serial output cp oe str d qp0 qpn qs1 [2] qs2 [3] ? l x x z z q6s no change ? lxxzzn.c.q7s ? h l x no change no change q6s no change ? hhl z qpn ?? 1 q6s no change ? hhhl qpn ?? 1 q6s no change ? h h h no change no change no change q7s fig 5. timing diagram 001aag801 clock input data input strobe input output enable input internal q0s (ff0) qp0 output internal q6s (ff6) qp6 output serial qs1 output serial qs2 output z-state z-state
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 5 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 7. limiting values [1] for dip16 package: p tot derates linearly with 12 mw/k above 70 ? c. [2] for so16 package: p tot derates linearly wi th 8 mw/k above 70 ? c. 8. recommended operating conditions table 4. limiting values in accordance with the absolute ma ximum rating system (iec 60134). symbol parameter conditions min max unit v dd supply voltage ? 0.5 +18 v i ik input clamping current v i < ? 0.5 v or v i >v dd + 0.5 v - ? 10 ma v i input voltage ? 0.5 v dd + 0.5 v i ok output clamping current qsn outputs; v o < ? 0.5 v or v o >v dd + 0.5 v - ? 10 ma qpn outputs; v o < ? 0.5 v - 40 ma i i input leakage current - ? 10 ma i o output current qsn outputs - ? 10 ma qpn outputs - 40 ma t stg storage temperature ? 65 +150 ?c t amb ambient temperature ? 40 +125 ?c p tot total power dissipation t amb = ? 40 ? c to +125 ?c dip16 package [1] -7 5 0m w so16 package [2] -5 0 0m w p power dissipation per output - 100 mw table 5. recommended operating conditions symbol parameter conditions min max unit v dd supply voltage 3 15 v v i input voltage 0 v dd v t amb ambient temperature in free air ? 40 +125 ?c ? t/? v input transition rise and fall rate v dd = 5 v - 3.75 ? s/v v dd = 10 v - 0.5 ? s/v v dd = 15 v - 0.08 ? s/v
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 6 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 9. static characteristics table 6. static characteristics v ss = 0 v; v i = v ss or v dd ; unless otherwise specified. symbol parameter conditions v dd t amb = ? 40 ?c t amb = 25 ?c t amb = 85 ?c t amb = 125 ?c unit min max min max min max min max v ih high-level input voltage ?i o ? < 1 ? a 5 v 3.5 - 3.5 - 3.5 - 3.5 - v 10 v 7.0 - 7.0 - 7.0 - 7.0 - v 15 v 11.0 - 11.0 - 11.0 - 11.0 - v v il low-level input voltage ?i o ? < 1 ? a 5 v - 1.5 - 1.5 - 1.5 - 1.5 v 10 v - 3.0 - 3.0 - 3.0 - 3.0 v 15 v - 4.0 - 4.0 - 4.0 - 4.0 v v oh high-level output voltage qsn outputs; ?i o ? < 1 ? a 5 v 4.95 - 4.95 - 4.95 - 4.95 - v 10 v 9.95 - 9.95 - 9.95 - 9.95 - v 15 v 14.95 - 14.95 - 14.95 - 14.95 - v v ol low-level output voltage qsn outputs; ?i o ? < 1 ? a 5 v - 0.05 - 0.05 - 0.05 - 0.05 v 10 v - 0.05 - 0.05 - 0.05 - 0.05 v 15 v - 0.05 - 0.05 - 0.05 - 0.05 v qpn outputs; ?i o ? < 20 ma 5 v - 0.75 - 0.75 - 1.5 - 1.5 v 10 v - 0.75 - 0.75 - 1.5 - 1.5 v 15 v - 0.75 - 0.75 - 1.5 - 1.5 v i oh high-level output current qsn outputs v o = 2.5 v 5 v - ? 1.7 - ? 1.4 - ? 1.1 - ? 1.1 ma v o = 4.6 v 5 v - ? 0.64 - ? 0.5 - ? 0.36 - ? 0.36 ma v o = 9.5 v 10 v - ? 1.6 - ? 1.3 - ? 0.9 - ? 0.9 ma v o = 13.5 v 15 v - ? 4.2 - ? 3.4 - ? 2.4 - ? 2.4 ma i ol low-level output current qsn outputs v o = 0.4 v 5 v 0.64 - 0.5 - 0.36 - 0.36 - ma v o = 0.5 v 10 v 1.6 - 1.3 - 0.9 - 0.9 - ma v o = 1.5 v 15 v 4.2 - 3.4 - 2.4 - 2.4 - ma i i input leakage current 15 v - ? 0.1 - ? 0.1 - ? 1.0 - ? 1.0 ? a i oz off-state output current qpn output is high; v o =15v 5 v - 2 - 2 - 15 - 15 ? a 10 v - 2 - 2 - 15 - 15 ? a 15 v - 2 - 2 - 15 - 15 ? a i dd supply current i o = 0 a 5 v - 5 - 5 - 150 - 150 ? a 10 v - 10 - 10 - 300 - 300 ? a 15 v - 20 - 20 - 600 - 600 ? a c i input capacitance -----7.5---pf
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 7 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 10. dynamic characteristics table 7. dynamic characteristics v ss = 0 v; t amb = 25 ? c unless otherwise specified. for test circuit, see figure 10 . symbol parameter conditions v dd extrapolation formula min typ max unit t phl high to low propagation delay cp to qs1; see figure 6 5 v [1] 132 ns + (0.55 ns/pf)c l -160320ns 10 v 53 ns + (0.23 ns/pf)c l - 65 130 ns 15 v 37 ns + (0.16 ns/pf)c l - 4590ns cp to qs2; see figure 6 5 v 92 ns + (0.55 ns/pf)c l -120240ns 10 v 39 ns + (0.23 ns/pf)c l - 50 100 ns 15 v 32 ns + (0.16 ns/pf)c l - 4080ns t plh low to high propagation delay cp to qs1; see figure 6 5 v [1] 102 ns + (0.55 ns/pf)c l -130260ns 10 v 44 ns + (0.23 ns/pf)c l -55110ns 15 v 32 ns + (0.16 ns/pf)c l - 4080ns cp to qs2; see figure 6 5 v 102 ns + (0.55 ns/pf)c l -130260ns 10 v 49 ns + (0.23 ns/pf)c l - 60 120 ns 15 v 37 ns + (0.16 ns/pf)c l - 4590ns t pzl off-state to low propagation delay cp to qpn; see figure 6 5 v - 240 480 ns 10 v - 80 160 ns 15 v - 55 110 ns str to qpn; see figure 7 5 v - 140 280 ns 10 v - 70 140 ns 15 v - 55 110 ns t plz low to off-state propagation delay cp to qpn; see figure 6 5 v - 170 340 ns 10 v - 75 150 ns 15 v - 60 120 ns str to qpn; see figure 7 5 v - 100 200 ns 10 v - 40 100 ns 15 v - 35 70 ns t en enable time oe to qpn; see figure 8 5 v [2] -100200ns 10 v - 55 110 ns 15 v - 50 100 ns t dis disable time oe to qpn; see figure 8 5 v [2] - 80 160 ns 10 v - 40 80 ns 15 v - 30 60 ns t t transition time qs1, qs2; see figure 6 5 v [1] [3] 35 ns + (1.00 ns/pf)c l - 85 170 ns 10 v 19 ns + (0.42 ns/pf)c l - 4080ns 15 v 16 ns + (0.28 ns/pf)c l - 3060ns
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 8 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver [1] the typical values of the propagation delay and transition times are calculated from the extrapolation formulas shown (c l in pf). [2] t en is the same as t pzl and t dis is the same as t plz [3] t t is the same as t tlh and t thl t w pulse width cp; low and high; see figure 6 5 v 60 30 - ns 10 v 30 15 - ns 15 v 24 12 - ns str; high; see figure 7 5 v 80 40 - ns 10 v 60 30 - ns 15 v 24 12 - ns t su set-up time d to cp; see figure 9 5 v 60 30 - ns 10 v 20 10 - ns 15 v 15 5 - ns t h hold time d to cp; see figure 9 5 v +5 ? 15 - ns 10 v 20 5 - ns 15 v 20 5 - ns f clk(max) maximum clock frequency cp; see figure 6 5 v 5 10 - mhz 10 v 11 22 - mhz 15 v 14 28 - mhz table 7. dynamic characteristics ?continued v ss = 0 v; t amb = 25 ? c unless otherwise specified. for test circuit, see figure 10 . symbol parameter conditions v dd extrapolation formula min typ max unit table 8. dynamic power dissipation p d can be calculated from the formulas shown. v ss = 0 v; t r = t f ? 20 ns; t amb = 25 ? c. symbol parameter v dd typical formula where p d dynamic power dissipation 5 v p d = 1200 ? f i + ? (f o ? c l ) ? v dd 2 ? wf i = input frequency in mhz; f o = output frequency in mhz; c l = output load capacitance in pf; ? (f o ? c l ) = sum of the outputs; v dd = supply voltage in v. 10 v p d = 5550 ? f i + ? (f o ? c l ) ? v dd 2 ? w 15 v p d = 15000 ? f i + ? (f o ? c l ) ? v dd 2 ? w
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 9 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 11. waveforms parallel output measurement points are given in table 9 . v ol and v oh are typical output voltage levels that occur with the output load. fig 6. propagation delay clock (cp) to output (qpn , qs1, qs2), clock pulse width and maximum clock frequency 001aag222 t plh 1/f clk(max) v m v m v x v i v ss v dd v ol v ol v ol t w t plz t plh t pzl v y cp input qs1 output qs2 output t thl t tlh 90 % 10 % v m 90 % 10 % t phl t thl t tlh qpn output t w t phl v oh v oh table 9. measurement points supply input output v dd v m v m v x v y 5 v to 15 v 0.5v dd 0.5v dd 0.1v o 0.9v o measurement points are given in table 9 . v ol is the typical output voltage level that occurs with the output load. fig 7. strobe (str) to output (qpn) propagation delays and the strobe pulse width 001aag802 cp input t w t plz t pzl v m v m v x v y v i v ss v i v ss str input v dd v ol qpn output
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 10 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver measurement points are given in table 9 . v ol is the typical output voltage level that occurs with the output load. fig 8. enable and disable times for input oe 001aag803 oe input output low to off-state off-state to low v i v m v x t pzl t plz outputs disabled outputs enabled outputs enabled v y v ss v dd v ol measurement points are given in table 9 . the shaded areas indicate when the input is per mitted to change for predictable output performance. v ol is the typical output voltage level that occurs with the output load. fig 9. set-up and hold time s for the data input (d) v i v m t su t h t su t h v m v ss v i v ss v dd cp input d input qpn output 001aag805 v ol
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 11 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver test data is given in table 10 . definitions for test circuit: dut - device under test. r l = load resistance. c l = load capacitance. r t = termination resistance should be equal to output impedance of z o of the pulse generator. v ext = external voltage for measuring switching times. fig 10. test circuit for measuring switching times 001aag804 dut v ext r t c l r l t r 10 % 90 % t f v i v i v o v dd v ss input pulse g table 10. test data supply input v ext load v dd v i t r , t f t plz , t pzl t plh , t phl c l r l 5 v to 15 v v dd ? 20 ns v dd open 50 pf 1 k ?
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 12 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 12. application information application example: serial-to-parallel data converting led drivers. fig 11. serial-to-parallel converting led drivers 001aag806 qp0 ds2 pwm dimmer input oe str data from remote control panel clock cp control and sync circuitry qp7 hef4794b qp0 ds2 v dd v dd oe str cp qp7 hef4794b
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 13 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 13. package outline fig 12. package outline sot38-4 (dip16) references outline version european projection issue date iec jedec jeita sot38-4 95-01-14 03-02-13 m h c (e ) 1 m e a l seating plane a 1 w m b 1 b 2 e d a 2 z 16 1 9 8 e pin 1 index b 0 5 10 mm scale note 1. plastic or metal protrusions of 0.25 mm (0.01 inch) maximum per side are not included. unit a max. 12 b 1 (1) (1) (1) b 2 cd e e m z h l mm dimensions (inch dimensions are derived from the original mm dimensions) a min. a max. b max. w m e e 1 1.73 1.30 0.53 0.38 0.36 0.23 19.50 18.55 6.48 6.20 3.60 3.05 0.254 2.54 7.62 8.25 7.80 10.0 8.3 0.76 4.2 0.51 3.2 inches 0.068 0.051 0.021 0.015 0.014 0.009 1.25 0.85 0.049 0.033 0.77 0.73 0.26 0.24 0.14 0.12 0.01 0.1 0.3 0.32 0.31 0.39 0.33 0.03 0.17 0.02 0.13 dip16: plastic dual in-line package; 16 leads (300 mil) sot38-4
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 14 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver fig 13. package outline sot109-1 (so16) x w m a a 1 a 2 b p d h e l p q detail x e z e c l v m a (a ) 3 a 8 9 1 16 y pin 1 index unit a max. a 1 a 2 a 3 b p cd (1) e (1) (1) eh e ll p qz ywv mm inches 1.75 0.25 0.10 1.45 1.25 0.25 0.49 0.36 0.25 0.19 10.0 9.8 4.0 3.8 1.27 6.2 5.8 0.7 0.6 0.7 0.3 8 0 o o 0.25 0.1 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.0 0.4 sot109-1 99-12-27 03-02-19 076e07 ms-012 0.069 0.010 0.004 0.057 0.049 0.01 0.019 0.014 0.0100 0.0075 0.39 0.38 0.16 0.15 0.05 1.05 0.041 0.244 0.228 0.028 0.020 0.028 0.012 0.01 0.25 0.01 0.004 0.039 0.016 0 2.5 5 mm scale so16: plastic small outline package; 16 leads; body width 3.9 mm sot109-1
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 15 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 14. revision history table 11. revision history document id release date data sheet status change notice supersedes hef4794b v.7 20111116 product data sheet - hef4794b v.6 modifications: ? section applications removed ? table 6 : ? i oh minimum values changed to maximum ? added the unit pf for c i hef4794b v.6 20100901 product data sheet - hef4794b v.5 hef4794b v.5 20100402 product data sheet - hef4794b v.4 hef4794b v.4 20091222 product data sheet - hef4794b v.3 hef4794b v.3 20080812 product data sheet - hef4794b v.2 hef4794b v.2 19990630 product specification - hef4794b v.1 hef4794b v.1 19940701 pr oduct specification - -
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 16 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver 15. legal information 15.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term ?short data sheet? is explained in section ?definitions?. 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nothing in this document may be interpreted or construed as an offer to sell products t hat is open for acceptance or the grant, conveyance or implication of any lic ense under any copyrights, patents or other industrial or intellectual property rights. export control ? this document as well as the item(s) described herein may be subject to export control regulations. export might require a prior authorization from competent authorities. document status [1] [2] product status [3] definition objective [short] data sheet development this document contains data from the objecti ve specification for product development. preliminary [short] data sheet qualification this document contains data from the preliminary specification. product [short] data sheet production this document contains the product specification.
hef4794b all information provided in this document is subject to legal disclaimers. ? nxp b.v. 2011. all rights reserved. product data sheet rev. 7 ? 16 november 2011 17 of 18 nxp semiconductors hef4794b 8-stage shift-and-store register led driver non-automotive qualified products ? unless this data sheet expressly states that this specific nxp semicon ductors product is automotive qualified, the product is not suitable for automotive use. it is neither qualified nor tested in accordance with automotive testing or application requirements. nxp semiconductors accepts no liabili ty for inclusion and/or use of non-automotive qualified products in automotive equipment or applications. in the event that customer uses t he product for design-in and use in automotive applications to automotive specifications and standards, customer (a) shall use the product without nxp semiconductors? warranty of the product for such automotive applicat ions, use and specifications, and (b) whenever customer uses the product for automotive applications beyond nxp semiconductors? specifications such use shall be solely at customer?s own risk, and (c) customer fully indemnifies nxp semiconductors for any liability, damages or failed product claims resulting from customer design and use of the product for automotive app lications beyond nxp semiconductors? standard warranty and nxp semiconduct ors? product specifications. 15.4 trademarks notice: all referenced brands, produc t names, service names and trademarks are the property of their respective owners. 16. contact information for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com
nxp semiconductors hef4794b 8-stage shift-and-store register led driver ? nxp b.v. 2011. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please se nd an email to: salesaddresses@nxp.com date of release: 16 november 2011 document identifier: hef4794b please be aware that important notices concerning this document and the product(s) described herein, have been included in section ?legal information?. 17. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features and benefits . . . . . . . . . . . . . . . . . . . . 1 3 ordering information . . . . . . . . . . . . . . . . . . . . . 1 4 functional diagram . . . . . . . . . . . . . . . . . . . . . . 2 5 pinning information . . . . . . . . . . . . . . . . . . . . . . 3 5.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 5.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3 6 functional description . . . . . . . . . . . . . . . . . . . 4 7 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 5 8 recommended operating conditions. . . . . . . . 5 9 static characteristics. . . . . . . . . . . . . . . . . . . . . 6 10 dynamic characteristics . . . . . . . . . . . . . . . . . . 7 11 waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 12 application information. . . . . . . . . . . . . . . . . . 12 13 package outline . . . . . . . . . . . . . . . . . . . . . . . . 13 14 revision history . . . . . . . . . . . . . . . . . . . . . . . . 15 15 legal information. . . . . . . . . . . . . . . . . . . . . . . 16 15.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 16 15.2 definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 15.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 15.4 trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 17 16 contact information. . . . . . . . . . . . . . . . . . . . . 17 17 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

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