View XR3077XID-F_8650352.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

exar corporation 48720 kato road, fremont ca, 94538 ? (510) 668-7000 ? fax (510) 668-7017 ? www.exar.com xr3070-78x low power 18v tolerant rs-485/rs-422 +3.3v transceivers may 2015 rev. 1.0.2 x series : excellence & reliability general description the xr3070-78x family of high performance rs-485/ 422 devices are designed for improved performance in noisy industrial environments and increased tolerance to system faults. the analog bus pins can withstand direct shorts up to 1 8v, and are protected against esd events up to 15kv. the differential high output driver delivers 10% higher snr than standard rs-485/422 devices, afford - ing additional noise margin or extended cable lengths. the receivers include full fail-safe circuitry, guarantee - ing a logic-high receiver output when the receiver in puts are open, shorted, or undriven. the receiver input impedance is at minimum 96 k w (1/8 unit load), allowing up to 256 devices on the bus while preserving the full signal margin. the drivers are protected by short circuit detection as w ell as thermal shutdown, and maintain high imped - ance in shutdown or when powered off. the xr3070- 7 5x drivers are slew limited for reduced emi and error- free communication over long or unterminated data cables. the devices with de and re pins include hot swap cir - cuitry to prevent false transitions on the bus during p owerup or live insertion, and can enter a 1na low cur - rent shutdown mode for extreme power savings. the transceivers draw less than 600a from a +3.3v sup ply, and typically only 300a when idling with the receivers active. v cc b/z a/y gnd ro re de di 1 2 3 4 r d 8 7 6 5 features ? 10% higher snr (signal-to-noise ratio) ? compared to other rs-485 devices (1.65v vs. 1.5v) ? 18v fault tolerance on analog bus pins ? robust esd (electrostatic discharge) protection: 15kv iec 61000-4-2 air gap discharge 8kv iec 61000-4-2 contact discharge 15kv human body model 4kv human body model on non-bus pins ? +3.0v to +3.6v operation (3.3v 10%) ? 300a idle current , 1na shutdown current ? enhanced receiver fail-safe protection for open, shorted, or terminated but idle data lines ? hot-swap glitch protection on de and re pins ? driver short circuit current limit and thermal shutdown for overload protection ? 1/8 th unit load allows up to 256 devices on bus ? operating temperature range: industrial -40c to 85c extended -40c to 125c ? industry standard 8 and 14 nsoic packages typical applications ? motor control ? security systems ? building and process automation ? remote utility meter reading ? energy monitoring and control ? long or unterminated transmission lines
absolute maximum ratings these are stress ratings only and functional operation of the device at these rating s or any other above those indicated in the operation sections to the specificati ons below is not implied. exposure to absolute maximum rating conditions for extended periods of time may affect reliabili ty and cause permanent damage to the device. v cc -0.3v to +7.0v input voltage at control and driver input ( re , de, and di) -0.3v to +7.0v receiver output voltage (ro) -0.3v to (v cc + 0.3v) driver output voltage (a, b, y and z) 18v receiver input voltage (a and b, half or full duplex) 18v transient voltage pulse, through 100 ?? ????? figure 6 70v driver output current 250ma storage temperature range -65c to +150c lead temperature (soldering, 10s) +300c package power dissipation 8-pin so q ja = 128.4c/w 14-pin so q ja = 86c/w maximum junction temperature = +150c xr3070-78x 2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 caution : esd (electrostatic discharge) sensitive device. permanent damage may occur on unconnected devices subject to high energy electrostatic fields. unused devices must be stored in conductive foam or shunts. personnel should be properly grounded prior to handling this device. the protective foam should be discharged to the destination socket before devices are removed.
ordering information p art n umber d uplex d ata r ate p ackage t emperature r ange xr3070 xid-f full 250kbps 14-pin narrow soic -40c to +85c xr3071xid-f full 250kbps 8-pin narrow soic -40c to +85c xr3072xid-f half 250kbps 8-pin narrow soic -40c to +85c xr3073xid-f full 1mbps 14-pin narrow soic -40c to +85c xr3074xid-f full 1mbps 8-pin narrow soic -40c to +85c xr3075xid-f half 1mbps 8-pin narrow soic -40c to +85c xr3076xid-f full 20mbps 14-pin narrow soic -40c to +85c XR3077XID-F full 20mbps 8-pin narrow soic -40c to +85c xr3078xid-f half 20mbps 8-pin narrow soic -40c to +85c xr3070 xed-f full 250kbps 14-pin narrow soic -40c to +125c xr3071xed-f full 250kbps 8-pin narrow soic -40c to +125c xr3072xed-f half 250kbps 8-pin narrow soic -40c to +125c xr3073xed-f full 1mbps 14-pin narrow soic -40c to +125c xr3074xed-f full 1mbps 8-pin narrow soic -40c to +125c xr3075xed-f half 1mbps 8-pin narrow soic -40c to +125c xr3076xed-f full 20mbps 14-pin narrow soic -40c to +125c xr3077xed-f full 20mbps 8-pin narrow soic -40c to +125c xr3078xed-f half 20mbps 8-pin narrow soic -40c to +125c n ote : tape and reel part numbers are xr30xxxidtr-f or xr30xxxedtr-f, -f = green / rohs compliant xr3070-78x 3 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers
electrical characteristics xr3070-78x 4 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 unless otherwise noted: v cc = +3.3v 10%, t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in . t yp . m ax . u nits c onditions driver dc characteristics v cc supply voltage range 3.0 3.6 v v od differential driver output 3 v cc v no load 2 v cc v r l = 100 ? (rs-422), figure 3 1. 6 5 v cc v r l = 54 ? (rs-485), figure 3 1. 5 v cc v -7v ? v cm ? +12v, figure 4 dv od change in magnitude of differential output voltage 0.2 v r l = 100 ? (rs-422), or ? r l = 54 ? (rs-485), ? figure 3 , note 1 v cm driver common-mode output voltage (steady state) v cc / 2 3 v dv cm change in magnitude of common-mode output voltage 0.2 v v ih logic input thresholds (di, de, re ) 2.0 v logic input high v il 0.8 v logic input low v hys input hysteresis (di, de, re ) 100 mv i in logic input current (di, de, re ) 1 a 0v ? v in ? v cc , after first transition, note 2 logic input current (de and re ) 100 200 a until first transition, note 2 i a, b input current (a and b) 125 a v out = +12v, de = 0v, v cc = 0v or 5.5v -100 a v out = -7v, de = 0v, ? v cc = 0v or 5.5v i ol output leakage (y and z) full duplex (note 2) 125 a v out = +12v, de = 0v, v cc = 0v or 5.5v -100 a v out = -7v, de = 0v, ? v cc = 0v or 5.5v i osd driver short-circuit output current 250 ma -7v ? v out ? +12v, figure 5 driver thermal characteristics t ts thermal shutdown temperature 175 c junction temperature, note 4 t tsh thermal shutdown hysteresis 15 c note 4
xr3070-78x 5 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers receiver dc characteristics v th receiver differential threshold voltage (v a - v b ) -200 -125 -50 mv -7v d v cm d +12v dv oh receiver input hysteresis 25 mv v cm = 0v v oh receiver output high voltage (ro) v cc -0.6 v i out = -1ma v ol receiver output low voltage (ro) 0.4 v i out = 1ma i ozr high-z receiver output current 1 a 0v d v out d v cc r in receiver input resistance 96 k w -7v d v cm d +12v i osc receiver output short-circuit current 80 ma 0v d v ro d v cc supply current i cc supply current 425 600 a no load, re = 0v, de = v cc di = 0v 330 600 a no load, re = v cc , de = v cc di = 0v 300 500 a no load, re = 0v, de = 0v receiver a and b inputs open i shdn supply current in shutdown mode 0.001 1 a re = v cc , de = 0v, temperature grade i 0.001 3 a re = v cc , de = 0v temperature grade e esd protection esd protection for a, b, y, and z 15 kv human body model 15 kv iec 61000-4-2 airgap 8 kv iec 61000-4-2 contact esd protection for all other pins 4 kv human body model unless otherwise noted: v cc = +3.3v 10%, t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in .t yp .m ax .u nits c onditions
xr3070-78x 6 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 driver ac characteristics xr3070x, xr3071x and xr3072x (250 kbps) t dplh driver prop. delay (low to high) 250 1500 ns c l = 50pf, r l = 54 : , figure 7 t dphl driver prop. delay (high to low) 250 1500 ns | t dplh -t dphl | differential driver output skew 20 200 ns t dr , t df driver differential output rise or fall time 350 1600 ns maximum data rate 250 kbps 1/t ui , duty cycle 40 to 60% t dzh driver enable to output high 200 2500 ns c l = 50pf, r l = 500 : , figure 8 t dzl driver enable to output low 200 2500 ns t dhz driver disable from output high 6 100 ns t dlz driver disable from output low 6 100 ns t dzh(shdn) driver enable from shutdown to output high 5500 ns c l = 50pf, r l = 500 : , figure 8 t dzl(shdn) driver enable from shutdown to output low 5500 ns t shdn time to shutdown 50 200 600 ns notes 3 and 4 receiver ac characteristics xr3070x, xr3071x and xr3072x (250kbp s) t rplh receiver prop. delay (low to high) 200 ns c l = 15pf, v id = 2v, v id rise and fall times < 15ns figure 9 t rphl receiver prop. delay (high to low) 200 ns | t rplh -t rphl | receiver propagation delay skew 30 ns maximum data rate 250 kbps 1/t ui , duty cycle 40 to 60% t rzh receiver enable to output high 50 ns c l = 15pf, r l = 1k : , figure 10 t rzl receiver enable to output low 50 ns t rhz receiver disable from output high 50 ns t rlz receiver disable from output low 50 ns t rzh(shdn) receiver enable from shutdown to output high 3500 ns c l = 15pf, r l = 1k : , figure 10 t rzl(shdn) receiver enable from shutdown to output low 3500 ns t shdn time to shutdown 50 200 600 ns notes 3 and 4 unless otherwise noted: v cc = +3.3v 10%, t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in .t yp .m ax .u nits c onditions
xr3070-78x 7 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers driver ac characteristics xr3073x, xr3074x and xr3075x (1mbps) t dplh driver prop. delay (low to high) 150 300 ns c l = 50pf, r l = 54 : , figure 7 t dphl driver prop. delay (high to low) 150 300 ns | t dplh -t dphl | differential driver output skew 5 50 ns t dr , t df driver differential output rise or fall time 100 200 300 ns maximum data rate 1 mbps 1/t ui , duty cycle 40 to 60% t dzh driver enable to output high 1000 2500 ns c l = 50pf, r l = 500 : , figure 8 t dzl driver enable to output low 1000 2500 ns t dhz driver disable from output high 60 100 ns t dlz driver disable from output low 60 100 ns t dzh(shdn) driver enable from shutdown to output high 3500 ns c l = 50pf, r l = 500 : , figure 8 t dzl(shdn) driver enable from shutdown to output low 3500 ns t shdn time to shutdown 50 200 600 ns notes 3 and 4 receiver ac characteristics xr3073x, xr3074x and xr3075x (1mb ps) t rplh receiver prop. delay (low to high) 200 ns c l = 15pf, v id = 2v, v id rise and fall times < 15ns figure 9 t rphl receiver prop. delay (high to low) 200 ns | t rplh -t rphl | receiver propagation delay skew 30 ns maximum data rate 1 mbps 1/t ui , duty cycle 40 to 60% t rzh receiver enable to output high 50 ns c l = 15pf, r l = 1k : , figure 10 t rzl receiver enable to output low 50 ns t rhz receiver disable from output high 50 ns t rlz receiver disable from output low 50 ns t rzh(shdn) receiver enable from shutdown to output high 3500 ns c l = 15pf, r l = 1k : , figure 10 t rzl(shdn) receiver enable from shutdown to output low 3500 ns t shdn time to shutdown 50 200 600 ns notes 3 and 4 unless otherwise noted: v cc = +3.3v 10%, t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in .t yp .m ax .u nits c onditions
xr3070-78x 8 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 driver ac characteristics xr3076x, xr3077x and xr3078x (20 mbps) t dplh driver prop. delay (low to high) 25 ns c l = 50pf, r l = 54 : , figure 7 t dphl driver prop. delay (high to low) 25 ns | t dplh -t dphl | differential driver output skew 5 ns t dr , t df driver differential output rise or fall time 12 ns maximum data rate 20 mbps 1/t ui , duty cycle 40 to 60% t dzh driver enable to output high 45 ns c l = 50pf, r l = 500 : , figure 8 t dzl driver enable to output low 45 ns t dhz driver disable from output high 40 ns t dlz driver disable from output low 40 ns t dzh(shdn) driver enable from shutdown to output high 250 ns c l = 50pf, r l = 500 : , figure 8 t dzl(shdn) driver enable from shutdown to output low 250 ns t shdn time to shutdown 50 200 600 ns notes 3 and 4 receiver ac characteristics xr3076x, xr3077x and xr3078x (20mbp s) t rplh receiver prop. delay (low to high) 50 ns c l = 15pf, v id = 2v, v id rise and fall times < 15ns figure 9 t rphl receiver prop. delay (high to low) 50 ns | t rplh -t rphl | receiver propagation delay skew 5 ns maximum data rate 20 mbps 1/t ui , duty cycle 40 to 60% t rzh receiver enable to output high 30 ns c l = 15pf, r l = 1k : , figure 10 t rzl receiver enable to output low 30 ns t rhz receiver disable from output high 30 ns t rlz receiver disable from output low 30 ns t rzh(shdn) receiver enable from shutdown to output high 1800 ns c l = 15pf, r l = 1k : , figure 10 t rzl(shdn) receiver enable from shutdown to output low 1800 ns t shdn time to shutdown 50 200 600 ns notes 3 and 4 unless otherwise noted: v cc = +3.3v 10%, t a = t min to t max . typical values are at v cc = 3.3v, t a = +25c. s ymbol p arameters m in .t yp .m ax .u nits c onditions
xr3070-78x 9 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers n ote : 1. change in magnitude of differential output voltage and change in magnitude of common mode output voltage are the changes in output voltag e when di input changes state. 2. the hot swap feature disables the de and re inputs for the first 10s after power is applied. following this time period these inputs are weakly pulled to their disabled state (low for de, high for re ) until the first transition, after which they become high impedance inputs. 3. the transceivers are put into shutdown by bringing re high and de low simultaneously for at least 600ns. if the control inputs are in this state for less than 50ns, the device is guaranteed to not enter shutdown. if the enable inputs are held in this state for at least 600ns the device is assured to be in shutdown. note that the receiver and driver enable times increase signific antly when coming out of shutdown. 4. this spec is guaranteed by design and bench characterization.
xr3070-78x 10 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 block diagrams f igure 1. h alf d uplex (xr3072x, xr3075x, xr3078x) v cc b/z a/y gnd ro re de di 1 2 3 4 r d 8 7 6 5 f igure 2. f ull d uple (r3070 r3071 r3073 r3074 r3076 r3077) a b z y v cc ro di gnd 1 2 3 4 r d 8 7 6 5 v cc n/c a b z y n/c n/c ro re de di gnd gnd 1 2 3 4 5 6 7 r d 14 13 12 11 10 9 8
f igure 3. d ifferential d river o utput v oltage d v od v cm de = v cc di = 0v or v cc z y r l 2 r l 2 f igure 4. d ifferential d river o utput v oltage over c ommon m ode d v od v cm 60 375 375 z y de = v cc di = 0v or v cc f igure 5. d river o utput s hort c ircuit c urrent d -7v to +12v v z y i osd de = 0v or v cc di = 0v or v cc xr3070-78x 11 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers test figures
f igure 6. t ransient o ver - voltage t est c ircuit 100 v test 15us duration 15 duty cycle transceiver, generator, or receiver a or z b or y device powered on or powered off f igure 7. d river p ropagation d elay t est c ircuit & t iming d iagram 3v 0v z y v od+ 0v v od- v od 1.5v 90% 10% 90% 10% t dr t df 1.5v t dplh t dphl di v od (v y - v z ) t skew = |t dphl C t dplh | d v od r l c l z y de = v cc di xr3070-78x 12 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2
f igure 8. d river e nable and d isable t iming t est c ircuits & t iming d iagrams r l c l d testing z: di = 0v testing y: di = v cc de z y v out 3v 0v v oh v ol de v out v oh + v ol 2 v oh - 0.25v 1.5v 1.5v t dzh t dhz r l c l d de v cc z y v out testing z: di = v cc testing y: di = 0v 3v 0v v oh v ol 1.5v 1.5v t dzl t dlz de v out v oh + v ol 2 v ol + 0.25v xr3070-78x 13 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers
f igure 9. r eceiver p ropagation d elay t est c ircuit & t iming d iagram c l b a r re = 0v ro b a ro 1.5v t rplh t rphl +1v 0v -1v v oh v ol 1.5v r3070-78 14 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2
f igure 10. r eceiver e nable and d isable t est c ircuits & t iming d iagrams r l c l ro b a r re 3v 0v v oh 0v v oh 2 v oh - 0.25v 1.5v 1.5v t rzh t rhz re v a = v cc v b = 0v ro c l ro b a r re r l v cc 3v 0v v cc v ol v cc + v ol 2 v ol + 0.25v 1.5v 1.5v t rzl t rlz re v a = 0v v b = v cc ro xr3070-78x 15 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers
xr3070-78x 16 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 pin descriptions p in n umber p in n ame t ype d escription h alf d uplex f ull d uplex xr3078x xr3077x xr3076x 1 2 2 ro out receiver output. when re is low and ? if (a-b) ? -50mv, ro is high. ? if (a-b) ? -200mv, ro is low. 2 - 3 re in receiver output enable (hot swap). when re is low, ro is enabled. when re is high, ro is high impedance. re should be high and de should be low to enter shutdown mode. 3 - 4 de in driver output enable (hot swap). when de is high, outputs ar e enabled. when de is low, outputs are high impedance. de should be low and re should be high to enter shutdown mode. 4 3 5 di in driver input. with de high, a low level on di forces non-inverting output lo w and inverting output high. similarly, a high level on di forces non-inverting output high and inverting output low. 5 4 6, 7 gnd pwr ground. 6 - - a i/o non-inverting receiver input and ? non-inverting driver output. 7 - - b i/o inverting receiver input and ? inverting driver output. 8 1 14 v cc pwr +3.3v power supply input. ? bypass to ground with 0.1 f capacitor. - 8 12 a in non-inverting receiver input. - 7 11 b in inverting reciever input. - 5 9 y out non-inverting driver output. - 6 10 z out inverting driver output. - - 1, 8, 13 n/c - no connect, not internally connected. xr3072x xr3075x xr3071x xr307 4x xr3070x xr3 073x
xr3070-78x 17 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers product description the xr3070-78x rs-485/422 devices are part of exar?s x series high performance serial interface product line. the analog bus pins can survive direct shorts up to 18v, and are protected against esd events up to 15kv. the high output differential driver delivers 10% higher snr than other rs-485/422 devices, affording additional noise margin or extended cable lengths. enhanced failsafe ordinary rs-485 differential receivers will be in an indeterminate state whenever the data bus is not being actively driven. the enhanced failsafe feature of the xr3070-78x family guarantees a logic-high receiver output when the receiver inputs are open, shorted, or when they are connected to a terminated transmission line with all drivers disabled. in a terminated bus with all transmitters disabled, the receivers? differential input voltage is pulled to 0v by the termination. the xr3070-78x family interprets 0v differential as a logic high with a minimum 50mv noise margin while maintaining comp liance with the eia/tia-485 standard of 200mv. although the xr3070-78x family does not need failsafe bias ing resistors, it can operate without issue if biasing is used. receiver input filtering xr3070-75x receivers incorporate internal filtering in addition to input hysteresis. this filtering enhances noise immunity by ignoring signals that do not meet a minimum pulse width of 30ns. receiver propagation delay increases slightly due to this filtering. the high speed xr3076x, xr3077x and xr3078x devices do not have this input filtering. hot-swap capability when v cc is first applied the xr3070-78x devices with de and re pins (70, 72, 73, 75, 76, & 78) hold the driver enable and receiver enable inactive for approximately 10 microseconds. during power ramp-up other system ics may drive unpredictable values, or tristated lines may be influenced by stray capacitance. the hot- swap feature prevents these devices from driving any ou tput signal until power has stabilized. after the initial 10s, the driver and receiver enable pins are weakly pulled to their disabled states (low for de, high for re ) until the first transition. after the first transition, the de and re pins operate as high impedance inputs. if circuit boards are inserted into an energized backplane (commonly called "live insertion" or "hot-swap") power may suddenly be applied to all circuits. without the hot-swap capability, this situation could improperly enable the transceiver?s driver or receiver, driving invalid data onto shared buses and possibly causing driver contention or device damage. driver output protection two mechanisms prevent excessive output current and power dissipation caused by faults or by bus contention. first, a driver current limit on the output stage provides immediate protection against short circuits over the whole common-mode voltage range. second, a thermal-shutdown circuit forces the driver outputs into a high-impedance state if junction temperature becomes excessive. line length the rs-485/rs-422 standard covers line lengths up to 4000ft. maximum achievable line length is a function of signal attenuation and noise. termination prevents sign al reflections by eliminating the impedance mismatches on a transmission line. line termination is generally used if rise and fall times are shorter than the round-trip signal propagation time. higher output drivers may allow longer cables to be used.
xr3070-78x 18 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 15kv esd protection esd protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. the driver outputs and receiver inputs of the xr3070-78x family have extra protection against static electricity. exar uses state of the art structures to protect these pins against esd of 15kv without damage. the esd structures withstand high esd in all states: normal operation, shutdown and powered down. after an esd event, the xr3070-78x keep operating without latch-up or damage. esd protection can be tested in various ways. the transmitter outputs and receiver inputs of the xr3070-78x are characterized for protection to the following limits: 15kv using the human body model 8kv contact discharge model 15kv air-gap discharge model esd test conditions esd performance depends on a variety of conditions. cont act exar for a reliability report that documents test setup, methodology and results. iec 61000-4-2 the iec 61000-4-2 standard covers esd testing and performance of finished equipment. however, it does not specifically refer to integrated circuits. the xr3070-78x family helps you design equipment to meet iec 61000-4-2, without sacrificing board-space and cost for external esd-protection components. the major differences between tests done using the human body model and iec 61000-4-2 is a higher peak current in iec 61000-4-2. series resistance is lower in the iec 61000-4-2 model. hence, the esd withstand voltage measured to iec 61000-4-2 is generally lower than that of human body model. the air-gap test involves approaching the device with a charged probe. the contact discharge method connects the probe to the device before the probe is energized. 256 transceivers on the bus the standard rs-485 receiver input impedance is 12k ohms (1 unit load). a standard driver can drive up to 32 unit loads. the xr3070-78x family of transceivers have a 1/8 th unit load receiver input impedance of 96 k w, allowing up to 256 transceivers to be connected in parallel on a communication line. any combination of these devices and other rs-485 transceivers up to a total of 32 unit loads may be connected to the line. low power shutdown mode low-power shutdown mode is initiated by bringing both re high and de low simultaneously. while in shutdown devices draw less than 1a of supply current. de and re may be tied together and driven by a single control signal. devices are guaranteed not to enter shutdown if re is high and de is low for less than 50ns. if the inputs are in this state for at leas t 600ns, the parts will enter shutdown. enable times t zh and t zl apply when the part is not in low-power shutdown state. enable times t zh(shdn) and t zl(shdn) apply when the parts are shutdown. the drivers and receivers take longer to become enabled from low-power shutdown t zh(shdn) and t zl(shdn) than from driver / receiver disable mode (t zh and t zl ).
xr3070-78x 19 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers function tables t able 1: full duplex 14 pin - xr3070x, xr3073x and xr3076x transmitting inputs outputs re de di y z x 1 1 1 0 x 1 0 0 1 0 0 x high-z 1 0 x shutdown t able 2: full duplex 8 pin - xr3071x, xr3074x and xr3077x transmitting input outputs di y z 1 1 0 0 0 1 t able 3: half duplex 8 pin - xr3072x, xr3075x and xr3078x transmitting inputs outputs re de di a b x 1 1 1 0 x 1 0 0 1 0 0 x high-z 1 0 x shutdown
t able 4: full duplex 14 pin - xr3070x, xr3073x and xr3076x receiving inputs output re de v - v b ro 0 x ? -50mv 1 0 x ? -200mv 0 0 x open/shorted 1 1 1 x high-z 1 0 x shutdown t able 5: full duplex 8 pin - xr3071x, xr3074x and xr3077x receiving inputs output v - v b ro ? -50mv 1 ? -200mv 0 open/shorted 1 t able 6: half duplex 8 pin - xr3072x, xr3075x and xr3078x receiving inputs output re de v - v b ro 0 x ? -50mv 1 0 x ? -200mv 0 0 x open/shorted 1 1 1 x high-z 1 0 x shutdown xr3070-78x 20 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 note: receiver inputs -200mv ? v a - v b ? -50mv are considered indeterminate. a a a
xr3070-78x 21 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers product selector guide t able 7: selection guide part number duplex data rate shutdown enable bus footprint xr3070xid-f full 250kbps ye s ye s 256 sn75180 xr3070xed-f full ye s ye s 256 sn75180 xr3071xid-f full no no 256 sn75179 xr3071xed-f full no no 256 sn75179 xr3072xid-f half ye s ye s 256 sn75176 xr3072xed-f half ye s ye s 256 sn75176 xr3073xid-f full 1mbps ye s ye s 256 sn75180 xr3073xed-f full ye s ye s 256 sn75180 xr3074xid-f full no no 256 sn75179 xr3074xed-f full no no 256 sn75179 xr3075xid-f half ye s ye s 256 sn75176 xr3075xed-f half ye s ye s 256 sn75176 xr3076xid-f full 20mbps ye s ye s 256 sn75180 xr3076xed-f full ye s ye s 256 sn75180 XR3077XID-F full no no 256 sn75179 xr3077xed-f full no no 256 sn75179 xr3078xid-f half ye s ye s 256 sn75176 xr3078xed-f half ye s ye s 256 sn75176 receiver and driver trans on
xr3070-78x 22 low power 18v tolerant rs-485/rs-422 +3.3v transceivers rev. 1.0.2 package drawings f igure 11. 8 nsoic
f igure 12. 14 nsoic xr3070-78x 23 rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers
revision history d ate r evision d escription sept 2013 1. 0 . 0 production release dec 2013 1. 0 . 1 updated typical driver differential rise/fall time, page 7 added figure 6 may 2015 1. 0 . 2 added extended temp range -40c to 125c part numbers, updated i shdn for indus - trial and extended temp range, updated ordering information table and table #7. ecn # 1525-07 24 notice exar corporation reserves the right to make changes to the products contained in th is publication in order to improve design, performance or reliability. exar corpor ation assumes no responsi bility for the use of any circuits described herein, conveys no license under any patent or other right, and makes no representation that the circuits are free of patent infr ingement. charts and schedu les contained here in are only for illustration purposes and may vary depending upon a users specific application. while the inform ation in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. exar corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its safety or effectiveness. products are not authorized for use in such applications unless exar corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assume s all such risks; (c) potential liab ility of exar corporation is adequately protected under the circumstances. copyright 2015 exar corporation datasheet may 2015. for technical support please email exars serial technical support group at: serialtechsupport@exar.com . reproduction, in part or whole, wi thout the prior written consent of exar corporation is prohibited. xr3070-78x rev. 1.0.2 low power 18v tolerant rs-485/rs-422 +3.3v transceivers

▲Up To Search▲

Price & Availability of XR3077XID-F

	To Download XR3077XID-F Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .