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general description the max3053 interfaces between the control area network (can) protocol controller and the physical wires of the bus lines in a can. it is primarily intended for industrial systems requiring data rates up to 2mbps and features 80v fault protection against shorts to high-voltage power buses. the device provides differential transmit capability to the bus and differential receive capability to the can controller. the max3053 has three different modes of operation: high-speed, slope control, and shutdown. high-speed mode allows data rates up to 2mbps. in slope control mode, data rates are between 40kbps and 500kbps so the effects of emi are reduced and unshielded twisted or parallel cable may be used. in shutdown mode, the transmitter is switched off, and the receiver is switched to a low-current mode. an autoshutdown function puts the device in 15a shut - down mode when the bus or can controller is inactive for 47ms or greater. the max3053 is available in an 8-pin so package and is specified for -40c to +125c operation. applications industrial control and networks printers hvac controls telecom 72v systems features 80v fault protection three operating modes ? high-speed operation up to 2mbps ? slope control mode to reduce emi (40kbps to 500kbps) 15a low-current shutdown mode autoshutdown when device is inactive automatic wakeup from shutdown thermal shutdown current limiting fully compatible with the iso 11898 standard pin configuration appears at end of data sheet. 19-2425; rev 1; 5/14 part temp range pin-package max3053esa -40c to +85c 8 so max3053asa -40c to +125c 8 so txd rxd rs 25k? to 180k? v cc canl gnd canh 120? 100nf shdn gnd txd 100nf can controller v cc 120? rxd max3053 typical operating circuit ordering information max3053 80v fault-protected, 2mbps, low supply current can transceiver
v cc to gnd ............................................................ -0.3v to +6v txd, rs, rxd, shdn to gnd...................-0.3v to (v cc + 0.3v) rxd shorted to gnd................................................. continuous canh, canl to gnd...........................-80v to +80v continuous continuous power dissipation 8-pin so (derate 5.9mw/c above +70c)..................470mw operating temperature ranges max3053asa ...................... ........... ............... -40c to +125c max3053esa ........................ ......... ................. -40c to +85c junction temperature..................... ............ ......................+150c storage temperature range...............................-65c to +150c lead temperature (soldering, 10s)...................................+300c (v cc = +5v 10%, r l = 60, rs = gnd, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25c.) parameter symbol conditions min typ max units supply current i s dominant (note 1) 56 72 ma dominant (no load) 6 recessive (note 1) 3.6 5.5 recessive (no load) 5.5 shutdown supply current i q shdn shdn = gnd 15 30 a thermal shutdown threshold 160 c thermal shutdown hysteresis 20 c txd input levels high-level input voltage v ih 2.0 v low-level input voltage v il 0.4 v high-level input current i ih v txd = v cc 1 a pullup resistor r intxd 20 k? canh, canl transmitter recessive bus voltage v canh , v canl v txd = v cc , no load 2 3 v off-state output leakage i lo -2v < v canh , v canl < +7v, shdn = gnd, v txd = v cc -2 +1 ma -80v < v canh , v canl < +80v, shdn = gnd, v txd = v cc -4 +4 canh output voltage v canh v txd = 0 3.0 v cc v canl output voltage v canl v txd = 0 0 2.0 v differential output (v canh - v canl ) v canh , v canl v txd = 0 1.5 5 v v txd = 0, r l = 45? 1.5 v txd = v cc ; no load -500 +50 mv canh short-circuit current i sc v canh = -5v -200 ma canl short-circuit current i sc v canl = 18v 200 ma esd canh, canl (note 2) human body model 2 kv iec1000-4-2 air-gap discharge 3 iec1000-4-2 contact discharge 2.5 maxim integrated 2 absolute maximum ratings stresses beyond 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 beyond those indicated in the operational sections of the specifications is not implied. exposure to ab solute maximum rating conditions for extended periods may affect device reliability. dc electrical characteristics max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
(v cc = +5v 10%, r l = 60, rs = gnd, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25c.) parameter symbol conditions min typ max units dc bus receiver (v txd = v cc ; canh and canl externally driven (-2v < v canh , v canl < +7v, unless otherwise specifed) differential input voltage (recessive) v diff -7v < v canh , v canl < +12v -1.0 +0.5 v differential input voltage (dominant) v diff -7v < v canh , v canl < +12v 0.9 3.3 v differential input hysteresis v diff(hyst) 150 mv canh input wakeup voltage threshold v canh( shdn ) shdn = gnd, v txd = v cc 6 9 v rxd high-level output voltage v oh i = -100a 0.8 x v cc v rxd low-level output voltage v ol i = 10ma 0.8 v i = 5ma 0.4 canh and canl input resistance r i 5 25 k? differential input resistance r diff 10 100 k? slope control input voltage for high speed v slp 0.3 x v cc v slope control mode voltage v slope r rs = 24k? to 180k? 0.4 x v cc 0.6 x v cc v slope control mode current i slope r rs = 24k? to 180k?, v cc = +5.0v -10 -200 a high-speed mode current i hs v rs = 0 -500 a autoshutdown shdn input voltage high 2 v shdn input voltage low 0.5 v maxim integrated 3 dc electrical characteristics (continued) max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
(v cc = +5v 10%, r l = 60, c l = 100pf, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25c.) (figures 1, 2, and 3) note 1: as defined by iso shdn , bus value is one of two complementary logical values: dominant or recessive. the dominant value represents the logical 1 and the recessive represents the logical 0. during the simultaneous transmission of the dominant and recessive bits, the resulting bus value is dominant. for max3053 values, see the truth table in the transmitter and receiver sections. note 2: the esd structures do not short out canh and canl under an esd event while -7v < canh, canl < +12v. parameter symbol conditions min typ max units minimum bit time t bit v rs = 0 (2mbps) 0.5 s r rs = 24k? (500kbps) 2 r rs = 100k? (125kbps) 8 r rs = 180k? (62.5kbps) 25 delay txd to bus active t ontxd v rs = 0 40 ns delay txd to bus inactive t offtxd v rs = 0 75 ns delay txd to receiver active t onrxd v rs = 0 (2mbps) 120 ns r rs = 24k? (500kbps) 0.4 s r rs = 100k? (125kbps) 1.6 r rs = 180k? (62.5kbps) 5.0 delay txd to receiver inactive t offrxd v rs = 0 (2mbps) 130 ns r rs = 24k? (500kbps) 0.45 s r rs = 100k? (125kbps) 1.6 r rs = 180k? (62.5kbps) 5.0 differential output slew rate |sr| r rs = 24k? (500kbps) 14 v/s r rs = 100k? (125kbps) 7 r rs = 180k? (62.5kbps) 1.6 time to wakeup: canh > 9v t wake shdn = gnd, v txd = v cc 10 s time to sleep mode when bus is recessive t shdn c shdn = 100nf 10 47 ms maxim integrated 4 timing characteristics max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
(v cc = +5v, r l = 60, c l = 100pf, t a = +25c, unless otherwise specifed.) 0 20 10 40 30 50 60 70 80 0 100 150 50 200 250 300 350 400 autoshutdown vs. c shdn max3053 toc02 c shdn (nf) sleep time (ms) 30 28 26 24 22 20 0 1000 500 1500 2000 supply current vs. data rate 50% duty cycle max3053 toc03 data rate (kbps) supply current (ma) t a = +125c t a = -40c t a = +25c 40 35 30 25 20 15 -50 20 -15 55 90 125 receiver propagation delay vs. temperature (recessive to dominant) max3053 toc04 temperature (c) receiver propagation delay (ns) 35 30 25 20 15 -40 26 -7 59 92 125 driver propagation delay vs. temperature, r rs = gnd max3053 toc05 temperature (c) driver propagation delay (ns) dominant recessive 1600 1200 800 400 0 0 10 5 15 20 25 receiver output low vs. output current max3053 toc06 output current (ma) voltage rxd (mv) t a = -40c t a = +25c t a = +125c 3.0 2.4 1.8 1.2 0.6 0 0 10 5 15 20 25 receiver output high vs. output current max3053 toc07 output current (ma) voltage rxd (v) t a = -40c t a = +25c t a = +125c 25 20 15 10 5 0 20 110 65 155 200 slew rate vs. r rs max3053 toc01 r rs (k?) slew rate (v/s) t a = -40c t a = +125c t a = +25c 5 4 3 2 1 0 0 100 50 150 250 200 300 differential voltage (canh - canl) vs. differential load r l max3053 toc08 differential load r l (?) differential voltage (v) t a = +25c t a = -40c t a = +125c receiver propagation delay (dominant to recessive) max3053 toc09 40ns/div differential input 2v/div maxim integrated 5 typical operating characteristics max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
(v cc = +5v, r l = 60, c l = 100pf, t a = +25c, unless otherwise specifed.) pin name function 1 txd transmit data input. txd is a cmos/ttl-compatible input from a can controller. 2 gnd ground 3 v cc supply voltage. bypass v cc to gnd with a 0.1f capacitor. 4 rxd receive data output. rxd is a cmos/ttl-compatible output from the physical bus lines canh and canl. 5 shdn shutdown input. drive shdn low to put the max3053 in shutdown mode. see the detailed description section for a full explanation of shdn behavior. 6 canl can bus line low. canl is fault protected to 80v. 7 canh can bus line high. canh is fault protected to 80v. 8 rs mode select pin. drive rs low or connect to gnd for high-speed operation. connect a resistor from rs to gnd to control output slope. see the mode selection section. driver propagation delay max3053 toc10 40ns/div r rs = gnd 2v/div txd canh - canl driver propagation delay max3053 toc11 400ns/div txd canh - canl r rs = 24k? 5v/div 1v/div r rs = 100k? r rs = 180k? maxim integrated 6 pin description typical operating characteristics (continued) max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
figure 1. ac test circuit figure 2. timing diagram for dynamic characteristics figure 3. time to wakeup (t wake ) 30pf txd rxd rs 24k? to 180k? v cc canl gnd canh 120? 100nf shdn rxd txd 0.1f can controller v cc 120? max3053 txd canh canl rxd t ontxd t onrxd t offtxd t offrxd canh?canl dominant 0.9v 0.5v v cc /2 v cc /2 recessive canh t wake 9v v shdn v shdn = 2v maxim integrated 7 test circuits/timing diagrams max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
detailed description the max3053 interfaces between the protocol controller and the physical wires of a can bus. it is primarily intend - ed for industrial applications requiring data rates up to 2mbps and features 80v fault protection against shorts in high-voltage systems. this fault protection allows the device to withstand up to 80v with respect to ground with no damage to the device. the built-in fault tolerance allows the device to survive in industrial and automotive environments with no external protection devices. the device provides differential transmit capability to the bus and differential receive capability to the can controller (figure 4). the device has three modes of operations: high-speed, slope control, and shutdown. in high-speed mode, slew rates are not limited, making 2mbps transmission speeds possible. slew rates are controlled in slope control mode, minimizing emi and allowing use of unshielded twisted or parallel cable. the device goes into low-power operation in shutdown mode. the transceiver is designed to operate from a single +5v supply, and draws 56ma of supply current in dominant state and 3.6ma in recessive state. in shutdown mode, supply current is reduced to 15a. canh and canl are output short circuit current limited and are protected against excessive power dissipation by thermal-shutdown circuitry that places the driver outputs into a high-impedance state. fault protection the max3053 features 80v fault protection. this extend - ed voltage range of canh and canl bus lines allows its use in high-voltage systems and communicating to high- voltage buses. if data is transmitting at 2mbps, the fault protection is reduced to 70v. transmitter the transmitter converts a single-ended input (txd) from the can controller to differential outputs for the bus lines (canh, canl). table 1 is the truth table for the transmit - ter and receiver. high speed connect rs to ground to set the max3053 to highspeed mode. when operating in high-speed mode, the max3053 can achieve transmission rates up to 2mbps. line drivers are switched on and off as quickly as possible. however, in this mode, no measures are taken to limit the rise and fall slope of the data signal, allowing for potential emi emissions. if using the max3053 in high-speed mode, use shielded twisted-pair cable to avoid emi problems. figure 4. block diagram thermal shutdown canh v cc txd rs rxd canl gnd autoshutdown transmitter control mode selection receiver wake 0.75v 7.5v shdn max3053 maxim integrated 8 max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
slope control connect a resistor from rs to ground to select slope control mode (see table 2). in slope control mode, the gates of the line drivers are charged with a controlled current, proportional to the resistor connected to the rs pin. transmission speed ranges from 40kbps to 500kbps. controlling the rise and fall slope reduces emi and allows the use of an unshielded twisted pair or a parallel pair of wires as bus lines. the transfer function for selecting the resistor value is given by: r rs (k) = 12000 / speed (in kbps). see the typical operating characteristics for the slew rate vs. r rs graph. shutdown to place the max3053 in shutdown, the shdn pin should be driven to gnd. in shutdown mode, the device is switched off. the outputs are high impedance to 80v. receiver the receiver takes differential input from the bus lines (canh, canl) and converts this data to a singleended output (rxd) to the can controller. it consists of a compar - ator that senses the difference v = (canh - canl) with respect to an internal threshold of 0.7v. if this difference is positive (i.e., v > 0.9v), a logic low is present at the rxd pin. if negative (i.e., v < 0.5v), a logic high is present. the receiver always echoes the transmitted data. the canh and canl common-mode range is from -7v to +12v. rxd is logic high when canh and canl are shorted or terminated and undriven. thermal shutdown if the junction temperature exceeds +160c, the device is switched off. the hysteresis is about 20c, disabling ther - mal shutdown once the temperature declines to +140c and the device is turned back on. autoshutdown to manage power consumption, autoshutdown puts the device into shutdown mode after the device has been inactive for a period of time. the value of an external capacitor (c shdn ) connected to shdn determines the threshold of inactivity time, after which the autoshutdown triggers (see typical operating characteristics ). use a 100nf capacitor as c shdn for a typical threshold of 20ms. change the capacitor value according to the following equation to change the threshold time period: (nf ) cc i (a) time(ms) c (v v (v)) = ? shdn shdn shdn drive shdn high to force the max3053 on and disable autoshutdown. when the max3053 is in shutdown mode, only the wake - up comparator is active, and normal bus communication is ignored. the remote master of the can system wakes up the max3053 with a signal greater than 9v on canh. the local can controller wakes up the max3053 by driv - ing shdn high or txd. driver output protection the max3053 has several features to protect itself from damage. thermal shutdown switches off the device and puts canh and canl into high impedance if the junc - tion temperature exceeds +160c. thermal protection is needed particularly when a bus line is short circuited. the hysteresis for the thermal shutdown is about 20c. * x = dont care. ** as defined by iso, bus value is one of two complementary logical values: dominant or recessive. the dominant value represents the logical 0 and the recessive represents the logical 1. during the simultaneous transmission of the dominant and recessive bits, the resulting bus value is dominant. table 1. transmitter and receiver truth table table 2. mode selection truth table txd shdn canh canl bus state rxd 0 v shdn > 1.5v high low dominant** 0 1 or foat v shdn > 1.5v 5? to 25k? to v cc /2 5? to 25k? to v cc /2 recessive** 1 x* v shdn < 0.5v floating floating floating 1 condition forced at pin rs mode resulting current at rs v rs < 0.3v cc high speed |i rs | < 500a 0.4v cc < v rs < 0.6v cc slope control 10a < |i rs | < 200a maxim integrated 9 max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
additionally, a current-limiting circuit protects the trans - mitter output stage against a short circuit to positive and negative battery voltage. although the power dissipation increases during this fault condition, this feature prevents destruction of the transmitter output stage. applications information reduced emi and refections in slope control mode, the canh, canl outputs are slew-rate limited, minimizing emi and reducing reflections caused by improperly terminated cables. in general, a transmitters rise time relates directly to the length of an unterminated stub, which can be driven with only minor waveform reflections. the following equation expresses this relationship conservatively: length = t rise / (10 x 1.5ns/ft) where t rise is the transmitters rise time. see figures 5, 6, and 7 for typical waveforms at various data rates. the max3053 requires no special layout considerations beyond common practices. bypass v cc to gnd with a 1f ceramic capacitor mounted close to the ic with short lead lengths and wide trace widths. figure 5. output bus in slope control mode at 62.5kbps figure 7. output bus high-speed mode at 2mbps figure 6. output bus in slope control mode at 500kbps canh?canl 5v/div fft 200mv/div 4.00s 31.5khz r rs = 180k? canh?canl 5v/div fft 200mv/div 100ns 1mhz r rs = 0? canh?canl 5v/div fft 200mv/div 400ns 250khz r rs = 24k? 1 2 3 4 8 7 6 5 rs canh canl shdn rxd v cc gnd txd so top view max3053 maxim integrated 10 chip information transistor count: 1214 process: bicmos pin confguration max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
package information for the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages . note that a +, #, or - in the package code indicates rohs status only. package drawings may show a different suffix character, but the drawing pertains to the package regardless of rohs status. package type package code document no. land pattern no. 8 so s8-5 21-0041 refer to application note 1891 maxim integrated 11 max3053 80v fault-protected, 2mbps, low supply current can transceiver www.maximintegrated.com
revision history revision number revision date description pages changed 0 4/02 initial release 1 5/14 removed automotive references under applications section 1 ? 2014 maxim integrated products, inc. 12 maxim integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim integrated product. no circuit patent licenses are implied. maxim integrated reserves the right to change the circuitry and specifcations without notice at any time. the parametric values (min and max limits) shown in the electrical characteristics table are guaranteed. other parametric values quoted in this data sheet are provided for guidance. maxim integrated and the maxim integrated logo are trademarks of maxim integrated products, inc. max3053 80v fault-protected, 2mbps, low supply current can transceiver for pricing, delivery, and ordering information, please contact maxim direct at 1-888-629-4642, or visit maxim integrateds website at www.maximintegrated.com.

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