SP490/SP491. Full Duplex RS-485 Transceivers. Now Available in Lead Free Packaging

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Florence Fletcher
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SP490/SP491 Full uplx RS-485 Transcivrs FTURS +5V Only Low Powr icmos rivr/rcivr nal (SP491) RS-485 and RS-422 rivrs/rcivrs Pin Compatil with LTC490 and SN75179 (SP490) Pin Compatil with LTC491 and

1 SP490/SP491 Full uplx RS-485 Transcivrs FTURS +5V Only Low Powr icmos rivr/rcivr nal (SP491) RS-485 and RS-422 rivrs/rcivrs Pin Compatil with LTC490 and SN75179 (SP490) Pin Compatil with LTC491 and SN75180 (SP491) Now vailal in Lad Fr Packaging SCRIPTION Th SP490 is a low powr diffrntial lin drivr/rcivr mting RS-485 and RS-422 standards up to 5Mps. Th SP491 is idntical to th SP490 with th addition of drivr and rcivr tri-stat nal lins. oth products fatur ±200mV rcivr input snsitivity, ovr wid common mod rang. Th SP490 is availal in 8-pin plastic IP and 8-pin NSOIC packags for opration ovr th commrcial and industrial tmpratur rangs. Th SP491 is availal in 14-pin IP and 14-pin NSOIC packags for opration ovr th commrcial and industrial tmpratur rangs. LOCK IGRMS Vcc 1 R 2 3 GN 4 R Z 5 Y NC R R GN GN 1 14 Vcc 13 NC 12 2 R Z Y NC SP490 SP491 1

2 SOLUT MXIMUM RTINGS Ths ar strss ratings only and functional opration of th dvic at ths ratings or any othr aov thos indicatd in th opration sctions of th spcifications low is not implid. xposur to asolut maximum rating conditions for xtndd priods of tim may affct rliaility. V CC...+7V Input Voltags rivrs v to (V CC +0.5V) Rcivrs...±14V Output Voltags rivrs...±14v Rcivrs V to (V CC +0.5V) Storag Tmpratur C to +150 Powr issipation mw T MIN to T MX and V CC = 5V ± 5% unlss othrwis notd. PRMTRS MIN. TYP. MX. UNITS CONITIONS LCTRICL CHRCTRISTICS SP490 RIVR C Charactristics iffrntial Output Voltag GN V CC Volts Unloadd; R = ; s figur 1 iffrntial Output Voltag 2 V CC Volts With Load; R = 50Ω; (RS422); s figur 1 iffrntial Output Voltag 1.5 V CC Volts With Load; R = 27Ω; (RS485); s figur 1 Chang in Magnitud of rivr iffrntial Output Voltag for Complimntary Stats 0.2 Volts R = 27Ω or R = 50Ω; s figur 1 rivr Common-Mod Output Voltag 3 Volts R = 27Ω or R = 50Ω; s figur 1 Input High Voltag 2.0 Volts pplis to Input Low Voltag 0.8 Volts pplis to Input Currnt ±10 µ pplis to rivr Short-Circuit Currnt V OUT = HIGH m -7V V O +12V V OUT = LOW m -7V V O +12V SP490 RIVR C Charactristics Maximum ata Rat 5 Mps rivr Input to Output ns t PLH ; R IFF = 54Ω, = 100pF; s figurs 3 and 6 rivr Input to Output ns t PHL ; R IFF = 54Ω, = 100pF; s figurs 3 and 6 rivr Skw 5 ns s figurs 3 and 6, t SKW = t PLH - t PHL rivr Ris or Fall Tim ns From 10% to 90%; R IFF = 54Ω, = 100pF; s figurs 3 and 6 SP490 RCIVR C Charactristics iffrntial Input Thrshold Volts -7V V CM 12V Input Hystrsis 70 mv V CM = 0V Output Voltag High 3.5 Volts I O = -4m, V I = +200mV Output Voltag Low 0.4 Volts I O = +4m, V I = -200mV Input Rsistanc kω -7V V CM 12V Input Currnt (, ); V IN = 12V ±1.0 m V IN = 12V Input Currnt (, ); V IN = -7V -0.8 m V IN = -7V Short-Circuit Currnt 85 m 0V V O V CC 2

3 T MIN to T MX and V CC = 5V ± 5% unlss othrwis notd. PRMTRS MIN. TYP. MX. UNITS CONITIONS SP490 RCIVR C Charactristics Maximum ata Rat 5 Mps Rcivr Input to Output ns t PLH ; R IFF = 54Ω, = 100pF; Figurs 3 & 8 Rcivr Input to Output ns t PHL ; R IFF = 54Ω, = C = L2 100pF; Figurs 3 & 8 iff. Rcivr Skw It PLH -t PHL I 13 ns R IFF = 54Ω; = 100pF; Figurs 3 & 8 POWR RQUIRMNTS Supply Voltag Volts Supply Currnt 900 µ NVIRONMNTL N MCHNICL Oprating Tmpratur Commrcial (_C_) C Industrial ( ) C Storag Tmpratur C Packag Plastic IP (_S_) NSOIC (_N) LCTRICL CHRCTRISTICS R Rcivr Tst Point Output S 1 1K V CC V O C RL 1K R V OC S 2 Figur 1. rivr C Tst Load Circuit Figur 2. Rcivr Timing Tst Load Circuit 3V I R IFF RO Output Undr 500 C L2 15pF Tst C L S 1 V CC S 2 Figur 3. rivr/rcivr Timing Tst Circuit Figur 4. rivr Timing Tst Load #2 Circuit 3

4 I RIVR OUTPUT +3V 0V IFFRNTIL V O + OUTPUT 0V V V V O f = 1MHz; t R < 10ns; t F < 10ns 1.5V 1.5V t PLH V 1/2V O 1/2V O O t PLH t R t PHL t PHL t F t SKW = t PLH - t PHL Figur 6. rivr Propagation lays +3V f = 1MHz; t R < 10ns; t F < 10ns 1.5V 1.5V 0V t ZL t LZ 5V, 2.3V V OL Output normally LOW 0.5V, V OH 0V 2.3V t ZH Output normally HIGH 0.5V t HZ Figur 7. rivr nal and isal Tims V 02 + V 02 0V INPUT 0V V OH R 1.5V OUTPUT 1.5V V OL t PHL t PLH f = 1MHz; t R < 10ns; t F < 10ns t SKW = t PHL - t PLH Figur 8. Rcivr Propagation lays 4

5 SOLUT MXIMUM RTINGS Ths ar strss ratings only and functional opration of th dvic at ths ratings or any othr aov thos indicatd in th opration sctions of th spcifications low is not implid. xposur to asolut maximum rating conditions for xtndd priods of tim may affct rliaility. V CC...+7V Input Voltags Logic V to (V CC +0.5V) rivrs v to (V CC +0.5V) Rcivrs...±14V Output Voltags Logic V to (V CC +0.5V) rivrs...±14v Rcivrs V to (V CC +0.5V) Storag Tmpratur C to +150 Powr issipation mw T MIN to T MX and V CC = 5V ± 5% unlss othrwis notd. PRMTRS MIN. TYP. MX. UNITS CONITIONS LCTRICL CHRCTRISTICS SP491 RIVR C Charactristics iffrntial Output Voltag GN V CC Volts Unloadd; R = ; s figur 1 iffrntial Output Voltag 2 V CC Volts With Load; R = 50Ω; (RS422); s figur 1 iffrntial Output Voltag 1.5 V CC Volts With Load; R = 27Ω; (RS485); s figur 1 Chang in Magnitud of rivr iffrntial Output Voltag for Complimntary Stats 0.2 Volts R = 27Ω or R = 50Ω; s figur 1 rivr Common-Mod Output Voltag 3 Volts R = 27Ω or R = 50Ω; s figur 1 Input High Voltag 2.0 Volts pplis to, R, Input Low Voltag 0.8 Volts pplis to, R, Input Currnt ±10 µ pplis to, R, rivr Short-Circuit Currnt V OUT = HIGH m -7V V O 12V V OUT = LOW m -7V V O 12V SP491 RIVR C Charactristics Maximum ata Rat 5 Mps R = 5V, = 5V rivr Input to Output ns t PLH ; R IFF = 54Ω, = 100pF; s figurs 3 and 6 rivr Input to Output ns t PHL ; R IFF = 54Ω, = 100pF; s figurs 3 and 6 rivr Skw 5 10 ns s figurs 3 and 6, t SKW = t PLH - t PHL rivr Ris or Fall Tim ns From 10% to 90%; R IFF = 54Ω, = 100pF; s figurs 3 and 6 rivr nal to Output High ns = 100pF; s figurs 4 and 7; S 2 closd rivr nal to Output Low ns = 100pF; s figurs 4 and 7; S 1 closd rivr isal Tim from Low ns = 100pF; s figurs 4 and 7; S 1 closd rivr isal Tim from High ns = 100pF; s figurs 4 and 7; S 2 closd 5

6 T MIN to T MX and V CC = 5V ± 5% unlss othrwis notd. PRMTRS MIN. TYP. MX. UNITS CONITIONS SP491 RCIVR C Charactristics iffrntial Input Thrshold Volts -7V V CM 12V Input Hystrsis 70 mv V CM = 0V Output Voltag High 3.5 Volts I O = -4m, V I = +200mV Output Voltag Low 0.4 Volts I O = +4m, V I = -200mV Thr Stat (high impdanc) Output Currnt ±1 µ 0.4V V O 2.4V; R = 5V Input Rsistanc kω -7V V CM 12V Input Currnt (, ); V IN = 12V ±1.0 m = 0V, V CC = 0V or 5.25V, V IN = 12V Input Currnt (, ); V IN = -7V -0.8 m = 0V, V CC = 0V or 5.25V, V IN = -7V Short-Circuit Currnt 7 85 m 0V V O V CC SP491 RCIVR C Charactristics Maximum ata Rat 5 Mps R = 0V Rcivr Input to Output ns t PLH ; R IFF = 54Ω, = 100pF; Figurs 3 & 8 Rcivr Input to Output ns t PHL ; R IFF = 54Ω, = C = L2 100pF; Figurs 3 & 8 iff. Rcivr Skw It PLH -t PHL I 13 ns R IFF = 54Ω; = 100pF; Figurs 3 & 8 Rcivr nal to Output Low ns C RL = 15pF; Figurs 2 and 9; S 1 closd Rcivr nal to Output High ns C RL = 15pF; Figurs 2 and 9; S 2 closd Rcivr isal from Low ns C RL = 15pF; Figurs 2 and 9; S 1 closd Rcivr isal from High ns C RL = 15pF; Figurs 2 and 9; S 2 closd POWR RQUIRMNTS Supply Voltag Volts Supply Currnt 600 µ R, = 0V or V CC ; = V CC SP491 NVIRONMNTL N MCHNICL Oprating Tmpratur Commrcial (_C_) C Industrial ( ) C Storag Tmpratur C Packag Plastic IP (_S_) NSOIC (_N) LCTRICL CHRCTRISTICS +3V R 1.5V f = 1MHz; t 1.5V R < 10ns; t F < 10ns 0V t ZL t LZ 5V R 1.5V Output normally LOW V 0.5V IL R V IH 0V 1.5V t ZH Output normally HIGH 0.5V t HZ Figur 9. Rcivr nal and isal Tims 6

7 SCRIPTION Th SP490 and SP491 ar full-duplx diffrntial transcivrs that mt th rquirmnts of RS-485 and RS-422. Faricatd with a Sipx propritary icmos procss, oth products rquir a fraction of th powr of oldr ipolar dsigns. Th RS-485 standard is idal for multi-drop applications or for long-distanc intrfacs. RS-485 allows up to 32 drivrs and 32 rcivrs to connctd to a data us, making it an idal choic for multi-drop applications. Sinc th caling can as long as 4,000 ft, RS-485 transcivrs ar quippd with a wid (-7V to +12V) common mod rang to accommodat ground potntial diffrncs. caus RS-485 is a diffrntial intrfac, data is virtually immun to nois in th transmission lin. rivr... Th drivrs for oth th SP490 and SP491 hav diffrntial outputs. Th typical voltag output swing with no load will 0 volts to +5 volts. With worst cas loading of 54Ω across th diffrntial outputs, th drivr can maintain gratr than 1.5V voltag lvls. Th drivr of th SP491 has a drivr nal control lin which is activ high. logic high on (pin 4) of th SP491 will nal th diffrntial drivr outputs. logic low on (pin 4) of th SP491 will tri-stat th drivr outputs. Th SP490 dos not hav a drivr nal. Rcivr... Th rcivrs for oth th SP490 and SP491 hav diffrntial inputs with an input snsitivity as low as ±200mV. Input impdanc of th rcivrs is typically 15KΩ (12KΩ minimum). wid common mod rang of -7V to +12V allows for larg ground potntial diffrncs twn systms. Th rcivrs for oth th SP490 and SP491 ar quippd with th fail-saf fatur. Fail-saf guarants that th rcivr output will in a high stat whn th input is lft unconnctd. Th rcivr of th SP491 has a rcivr nal control lin which is activ low. logic low on R (pin 3) of th SP491 will nal th diffrntial rcivr. logic high on R (pin 3) of th SP491 will tri-stat th rcivr. 7

8 PCKG: 8 PIN NSOIC Ø /2 1/2 1 Sating Plan Ø1 L L2 Ø INX R (/2 X 1/2) 1 TOP VIW L1 VIW C Gaug Plan 1 Sating Plan 2 SI VIW 8 Pin NSOIC JC MO-012 () Variation SYMOL MIN NOM MX c L SC 6.00 SC 3.90 SC 1.27 SC L1 L2 ø 0º 1.04 RF 0.25 SC - 8º ø1 5º - 15º c S VIW C Not: imnsions in (mm) S MTL SCTION - WITH PLTING 8

9 PCKG: 14 PIN NSOIC Ø /2 1 1/2 Sating Plan Ø1 L L2 Ø INX R (/2 X 1/2) 1 TOP VIW L1 VIW C Gaug Plan 1 Sating Plan 2 SI VIW 14 Pin NSOIC JC MO-012 () Variation SYMOL MIN NOM MX c L SC 6.00 SC 3.90 SC 1.27 SC L1 L2 ø 0º 1.04 RF 0.25 SC - 8º ø1 5º - 15º S VIW C Not: imnsions in (mm) c S MTL SCTION - WITH PLTING 9

10 PCKG: 8 PIN PIP N INX R N/2 c L c 8 PIN PIP JC MS-001 () Variation SYMOL MIN NOM MX c SC.300 SC L Not: imnsions in (mm) 10

11 PCKG: 14 PIN PIP INX R N N/2 c L 2 14 PIN PIP JC MS-001 () Variation SYMOL MIN NOM MX c SC.300 SC L Not: imnsions in (mm) c 11

12 Modl Tmpratur Rang Packag SP490CN C to +70 C... 8-Pin NSOIC SP490CN/TR... 0 C to +70 C... 8-Pin NSOIC SP490CS... 0 C to +70 C... 8-Pin PIP SP490N C to +85 C... 8-Pin NSOIC SP490N/TR C to +85 C... 8-Pin NSOIC SP490S C to +85 C... 8-Pin PIP SP491CN... 0 C to +70 C Pin NSOIC SP491CN/TR... 0 C to +70 C Pin NSOIC SP491CS... 0 C to +70 C Pin PIP SP491N C to +85 C Pin NSOIC SP491N/TR C to +85 C Pin NSOIC SP491S C to +85 C Pin PIP vailal in lad fr packaging. To ordr add "-L" suffix to part numr. xampl: SP491CN/TR = standard; SP491CN-L/TR = lad fr /TR = Tap and Rl Pack quantity is 2500 for NSOIC. ORRING INFORMTION CLICK HR TO ORR SMPLS Corporation NLOG XCLLNC Sipx Corporation Hadquartrs and Sals Offic 233 South Hillviw riv Milpitas, C TL: (408) FX: (408) Sipx Corporation rsrvs th right to mak changs to any products dscrid hrin. Sipx dos not assum any liaility arising out of th application or us of any product or circuit dscrid hring; nithr dos it convy any licns undr its patnt rights nor th rights of othrs. 12

Precision Micropower 2.5V ShuntVoltage Reference

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