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19-3598; Rev 0; 2/05
Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
General Description
The MAX13050/MAX13052/MAX13053/MAX13054 are pin-for-pin compatible, industry-standard, high-speed, control area network (CAN) transceivers with extended 80V fault protection. These products are ideal automotive and industrial network applications where overvoltage protection is required. These CAN transceivers provide a link between the CAN protocol controller and the physical wires of the bus lines in a CAN. These devices can be used for +12V/+42V battery, automotive, and DeviceNet(R) applications, requiring data rates up to 1Mbps. The CAN transceivers have an input common-mode range greater than 12V, exceeding the ISO11898 specification of -2V to +7V, and feature 8kV ESD protection, making these devices ideal for harsh automotive and industrial environments. The CAN transceivers provide a dominant timeout function that prevents erroneous CAN controllers from clamping the bus to a dominant level if the TXD input is held low for greater than 1ms. The MAX13050/MAX13052 provide a SPLIT pin used to stabilize the recessive commonmode voltage. The MAX13052 also has a slope-control mode that can be used to program the slew rate of the transmitter for data rates of up to 500kbps. The MAX13053 features a silent mode that disables the transmitter. The MAX13053 also has a reference output that can be used to bias the input of older CAN controllers that have a differential comparator. The MAX13054 has a separate dedicated logic input, VCC2, allowing interfacing with a +3.3V microcontroller. The MAX13050/MAX13052/MAX13053/MAX13054 are available in an 8-pin SO package and are specified to operate in the -40C to +85C and the -40C to +125C temperature ranges.
Features
Fully Compatible with the ISO11898 Standard 8kV ESD IEC 61000-4-2 Contact Discharge per IBEE Test Facility 80V Fault Protection +3.3V Logic Compatible (MAX13054) High-Speed Operation of Up to 1Mbps Slope-Control Mode (MAX13052) Greater than 12V Common-Mode Range Low-Current Standby Mode Silent Mode (MAX13053) Thermal Shutdown Short-Circuit Protection Transmit (TXD) Data Dominant Timeout Current Limiting SPLIT Pin (MAX13050/MAX13052)
MAX13050/MAX13052/MAX13053/MAX13054
Ordering Information
PART MAX13050ESA MAX13050ASA/AUT* MAX13052ESA MAX13052ASA/AUT* MAX13053ESA MAX13053ASA/AUT* MAX13054ESA MAX13054ASA/AUT* TEMP RANGE -40C to +85C -40C to +125C -40C to +85C -40C to +125C -40C to +85C -40C to +125C -40C to +85C -40C to +125C PIN-PACKAGE 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO 8 SO
Applications
+12V and +42V Automotive DeviceNet Nodes Medium- and Heavy-Duty Truck Systems Industrial
*AUT denotes introduction to AECQ100 specifications. Pin Configurations, Functional Diagrams, and Typical Operating Circuits appear at end of data sheet. DeviceNet is a registered trademark of the Open DeviceNet Vendor Association.
Selector Guide
PART MAX13050 MAX13052 MAX13053 MAX13054 SPLIT Yes Yes -- -- SLOPE CONTROL -- Yes -- -- STANDBY MODE Yes Yes -- Yes SILENT MODE -- -- Yes 3.3V SUPPLY -- -- -- Yes REF -- -- Yes -- PIN-FOR-PIN REPLACEMENT TJA1040 PCA82C250/5-1 TJA1050, AMIS-30660 TLE6250v33, CF163
________________________________________________________________ Maxim Integrated Products
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
ABSOLUTE MAXIMUM RATINGS
VCC, VCC2 ...............................................................-0.3V to +6V RS ...............................................................-0.3V to (VCC + 0.3V) TXD, STBY, S, REF, RXD .........................................-0.3V to +6V CANH, CANL, SPLIT .......................................................... 80V Continuous Power Dissipation (TA = +70C) 8-Pin SO (derate 5.9mW/C above +70C) .................470mW Operating Temperature Range .........................-40C to +125C Junction Temperature ......................................................+150C Storage Temperature Range .................................-65C +150C Lead Temperature (soldering, 10s) ................................+300C
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 absolute maximum rating conditions for extended periods may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
(VCC = +5V 5%, VCC2 = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VCC2 = +3.3V, RL = 60, and TA = +25C.) (Note 1)
PARAMETER SYMBOL CONDITIONS Dominant, RL = 60 VCC Supply Current ICC Recessive MAX13050/MAX13052/ MAX13053 MAX13054 VCC2 Supply Current Standby Current Silent Mode Thermal-Shutdown Threshold Thermal-Shutdown Hysteresis INPUT LEVELS (TXD, STBY, S) 2 High-Level Input Voltage VIH TXD, STBY (MAX13054) 0.7 x VCC2 0.8 Low-Level Input Voltage VIL TXD, STBY (MAX13054) VTXD = VCC, VTXD = VCC2 (MAX13054) VSTBY = VCC, VS = VCC (MAX13053) VTXD = GND VSTBY = GND, VS = GND (MAX13053) -5 -5 -300 -10 10 Normal mode, VTXD = VCC, no load Standby mode, no load VCANH, VCANL = 76V -32V VCANH, VCANL +32V VTXD = 0, dominant VTXD = 0, dominant VTXD = 0, dominant, TA = +25C, (VCANH + VCANL) - VCC -2.5 3.0 0.50 -100 2 -100 3 +2.5 4.25 1.75 +150 3 +100 0.3 x VCC2 +5 +5 -100 -1 V V ICC2 ISTANDBY ISILENT TSH MAX13054, TXD = VCC2 or floating MAX13052 MAX13050/MAX13054 MAX13053 +165 13 MIN TYP MAX 72 12.5 10 15 25 11 12.5 A A mA C C mA UNITS
High-Level Input Current Low-Level Input Current Input Capacitance CANH, CANL TRANSMITTER Recessive Bus Voltage Recessive Output Current CANH Output Voltage CANL Output Voltage Matching Between CANH and CANL Output Voltage
IIH IIL CIN VCANH, VCANL ICANH, ICANL VCANH VCANL DOM
A A pF V mV mA V V mV
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V 5%, VCC2 = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VCC2 = +3.3V, RL = 60, and TA = +25C.) (Note 1)
PARAMETER Differential Output (VCANH - VCANL) CANH Short-Circuit Current CANL Short-Circuit Current RXD OUTPUT LEVELS I = -100A RXD High-Output-Voltage Level VOH I = -100A (MAX13054) RXD Low-Output-Voltage Level VOL I = 5mA Normal mode, -500A ISPLIT 500A Standby mode, -40V VSPLIT +40V Standby mode, -76V VSPLIT +76V -50A IREF +50A (MAX13053) 0.45 x VCC 0.5 0.50 70 15 35 0.7 0.3 x VCC 0.8 x VCC 0.8 x VCC2 VCC V VCC2 0.4 0.7 x VCC 20 50 0.55 x VCC 0.9 1.15 V mV k V SYMBOL VDIFF ICANHSC ICANLSC CONDITIONS Dominant, VTXD = 0, 45 RL 60 Recessive, VTXD = VCC, no load VCANH = 0, VTXD = 0 VCANL = 5V, VTXD = 0 VCANL = 40V, VTXD = 0 (Note 2) VCANL = 76V, VTXD = 0 MIN 1.5 -50 -100 40 40 -70 60 60 63 TYP MAX 3.0 +50 -45 90 90 mA UNITS V mV mA
MAX13050/MAX13052/MAX13053/MAX13054
COMMON-MODE STABILIZATION (SPLIT) and REF Output Voltage Leakage Current REF Output Voltage VSPLIT ILEAK VREF V A V
DC BUS RECEIVER (VTXD = VCC, CANH and CANL externally driven) -12V VCM +12V Differential Input Voltage Differential Input Hysteresis Common-Mode Input Resistance Matching Between CANH and CANL Common-Mode Input Resistance Differential Input Resistance Common-Mode Input Capacitance Differential Input Capacitance Input Leakage Current SLOPE CONTROL RS ( MAX13052) Input Voltage for High Speed VIL_RS 0.3 x VCC V ILI VDIFF MAX13050/MAX13052/MAX13054 -12V VCM +12V (standby mode) Normal or standby mode, VCANH = VCANL = 12V
VDIFF(HYST) Normal mode, -12V VCM +12V RICM
RIC_MATCH VCANH = VCANL Normal or standby mode, VCANH - VCANL = 1V VTXD = VCC VTXD = VCC VCC = 0, VCANH = VCANL = 5V
-3
+3
%
RDIFF CIM
25 20 10 -5
75
k pF pF
+5
A
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
DC ELECTRICAL CHARACTERISTICS (continued)
(VCC = +5V 5%, VCC2 = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VCC2 = +3.3V, RL = 60, and TA = +25C.) (Note 1)
PARAMETER Input Voltage for Standby Slope-Control Mode Voltage High-Speed Mode Current ESD Protection SYMBOL VIH_RS VSLOPE IIL_RS -200A < IRS < 10A VRS = 0 IEC 61000-4-2 Contact Discharge Method per IBEE test facility (Note 3) CONDITIONS MIN 0.75 x VCC 0.4 x VCC -500 8 0.6 x VCC TYP MAX UNITS V V A kV
TIMING CHARACTERISTICS
(VCC = +5V 5%, VCC2 = +3V to +3.6V, RL = 60, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VCC2 = +3.3V, and TA = +25C.)
PARAMETER Delay TXD to Bus Active Delay TXD to Bus Inactive Delay Bus to Receiver Active Delay Bus to Receiver Inactive Delay TXD to RXD Active (Dominant Loop Delay) Delay TXD to RXD Inactive (Recessive Loop Delay) SYMBOL tONTXD tOFFTXD tONRXD tOFFRXD tONLOOP TOFFLOOP CONDITIONS Figure 1 (Note 4) Figure 1 (Note 4) Figure 1 (Note 4) Figure 1 (Note 4) Figure 1 (Note 4) Figure 4 (Note 4) RRS = 24k (500kbps) Delay TXD to RXD Active (Dominant Loop Delay) Slew-Rate Controlled tONLOOP-S MAX13052 RRS = 100k (125kbps) RRS = 180k (62.5kbps) RRS = 24k (500kbps) Delay TXD to RXD Inactive (Loop Delay) Slew-Rate Controlled tOFFLOOP-S MAX13052 RRS = 100k (125kbps) RRS = 180k (62.5kbps) RRS = 24k (500kbps) Differential Output Slew Rate |SR| MAX13052 RRS = 100k (125kbps) RRS = 180k (62.5kbps) MAX13050/MAX13052/ MAX13053 MAX13054 MIN TYP 66 61 70 54 46 121 108 280 0.82 1.37 386 0.74 0.97 10 2.7 1.6 V/s MAX 110 95 110 115 160 255 255 450 1.6 s 5 600 1.6 s 5 ns ns ns ns ns ns UNITS ns ns
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
TIMING CHARACTERISTICS (continued)
(VCC = +5V 5%, VCC2 = +3V to +3.6V, RL = 60, CL = 100pF, TA = TMIN to TMAX, unless otherwise noted. Typical values are at VCC = +5V, VCC2 = +3.3V, and TA = +25C.)
PARAMETER Dominant Time for Wake-Up with Bus Delay STBY to Normal Mode (DOMINANT) TXD Dominant Timeout SYMBOL tWAKE tSTBYNORM
MAX13050/MAX13052/MAX13053/MAX13054
CONDITIONS Standby mode, VDIFF = +3V, Figure 2 TXD = 0 (MAX13050, MAX13054) FROM STBY falling to CANH - CANL = 0.9V VTXD = 0
MIN 0.75 5 0.3
TYP 1.5
MAX 3.00 10
UNITS s s ms
tDOM
0.6
1.0
Note 1: All currents into the device are positive, all currents out of the device are negative. All voltages are referenced to the device ground, unless otherwise noted. Note 2: Guaranteed by design, not production tested. Note 3: MAX13050 tested by IBEE test facility. Please contact factory for report. MAX13052/MAX13053/MAX13054 are pending ESD evaluation. Note 4: For the MAX13052, VRS = 0.
Timing Diagrams
TXD
DOMINANT 0.9V 0.5V VDIFF RECESSIVE
RXD 0.7 x VCC OR 0.7 x VCC2
0.3 x VCC OR 0.3 x VCC2
tONTXD tONRXD tONLOOP
tOFFTXD tOFFRXD tOFFLOOP
Figure 1. Timing Diagram
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Timing Diagrams
STANDBY MODE DOMINANT 0.9V VDIFF
RXD tWAKE
Figure 2. Timing Diagram for Standby and Wake-Up Signal
Typical Operating Characteristics
(VCC = +5V, RL = 60, CL = 100pF, VCC2 = +3.3V, and TA = +25C, unless otherwise noted.)
SLEW RATE vs. RRS AT 100kbps
MAX13050 toc01
SUPPLY CURRENT vs. DATA RATE
MAX13050 toc02
STANDBY SUPPLY CURRENT vs. TEMPERATURE (RS = VCC)
19.0 STANDBY SUPPLY CURRENT (A) 18.0 17.0 16.0 15.0 14.0 13.0 12.0 11.0 MAX13052
MAX13050 toc03
30 MAX13052 25 SLEW RATE (V/s) 20 15 10 5 0 0 RECESSIVE DOMINANT
40 TA = +125C
20.0
35 SUPPLY CURRENT (mA)
30 TA = -40C TA = +25C
25
20
15 0 100 200 300 400 500 600 700 800 900 1000 DATA RATE (kbps) RRS (k)
10.0 -50 -25 0 25 50 75 100 125 TEMPERATURE (C)
20 40 60 80 100 120 140 160 180 200
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
Typical Operating Characteristics
(VCC = +5V, RL = 60, CL = 100pF, VCC2 = +3.3V, and TA = +25C, unless otherwise noted.)
STANDBY SUPPLY CURRENT vs. TEMPERATURE (STBY = VCC)
MAX13050 toc04
MAX13050/MAX13052/MAX13053/MAX13054
RECEIVER PROPAGATION DELAY vs. TEMPERATURE
MAX13050 toc04
DRIVER PROPAGATION DELAY vs. TEMPERATURE
180 160 140 120 100 80 60 40 20 0 RECESSIVE DOMINANT
MAX13050 toc06
8.0 STANDBY SUPPLY CURRENT (A) 7.5 7.0 6.5 6.0 5.5 5.0 4.5 4.0 -50 -25 0 25 50 75 100 MAX13050 MAX13054
100 RECEIVER PROPAGATION DELAY (ns) 90 80 70 60 50 40 30 20 10 0 RECESSIVE DATA RATE = 100kbps DOMINANT
200 DRIVER PROPAGATION DELAY (ns)
125
-50
-25
0
25
50
75
100
125
-50
-25
0
25
50
75
100
125
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
REF VOLTAGE vs. REG OUTPUT CURRENT
MAX13050 toc07
SPLIT LEAKAGE CURRENT vs. TEMPERATURE
MAX13050 toc08
RECEIVER OUTPUT LOW vs. OUTPUT CURRENT
MAX13050/MAX13052/MAX13053 1.2 VOLTAGE RXD (V) 1.0 0.8 0.6 0.4 TA = +125C TA = +25C
MAX13050 toc09
2.60 2.58 2.56 REF VOLTAGE (V) 2.54 2.52 2.50 2.48 2.46 2.44 2.42 2.40 0 5 TA = -40C TA = +125C TA = +25C
10
1.4
1 LEAKAGE CURRENT (A)
0.1
0.01
0.001
0.2 0 -50 -25 0 25 50 75 100 125 0 5 10
TA = -40C 15 20
0.0001 10 15 20 25 30 35 40 45 50 REG OUTPUT CURRENT (A) TEMPERATURE (C)
OUTPUT CURRENT (mA)
RECEIVER OUTPUT HIGH vs. OUTPUT CURRENT
MAX13050 toc10
RECEIVER OUTPUT HIGH vs. OUTPUT CURRENT
MAX13050 toc11
RECEIVER OUTPUT LOW vs. OUTPUT CURRENT
MAX13054 VCC2 = +3.3V
MAX13050 toc12
300 RECEIVER OUTPUT HIGH (VCC2 - RXD) (mV) 250
MAX13054
2.0 RECEIVER OUTPUT HIGH (VCC - RXD) (V) 1.8 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2 0 TA = -40C TA = +125C MAX13050/MAX13052/MAX13053 TA = +25C
300.0 250.0 VOLTAGE RXD (mV) 200.0 150.0 100.0 50.0 0
TA = +125C
TA = +125C 200 150 100 50 0 0 100 200 300 400 500 600 OUTPUT CURRENT (A) TA = -40C TA = +25C
TA = +25C
TA = -40C
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
OUTPUT CURRENT (mA)
OUTPUT CURRENT (mA)
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Typical Operating Characteristics (continued)
(VCC = +5V, RL = 60, CL = 100pF, VCC2 = +3.3V, and TA = +25C, unless otherwise noted.)
DIFFERENTIAL VOLTAGE vs. DIFFERENTIAL LOAD
TA = -40C TA = +125C TA = +25C VDIFF 2V/div RXD (2V/div)
MAX13050 toc13
RECEIVER PROPAGATION DELAY
MAX13051 toc14
MAX13054 WAVEFORM
MAX13050 toc15
3.5 3.0 DIFFERENTIAL VOLTAGE (V) 2.5 2.0 1.5 1.0 0.5 0 20 60 100 140 180 220 260
VDIFF (1V/div)
TXD 2V/div
RXD 2V/div
300
200ns
200ns/div
DIFFERENTIAL LOAD RL ()
DRIVER PROPAGATION DELAY, (RRS = 24k, 75k AND 100k)
MAX13051 toc16
DRIVER PROPAGATION DELAY
MAX13051 toc17
LOOPBACK PROPAGATION DELAY vs. RRS
MAX13052 LOOPBACK PROPAGATION DELAY (s) TXD (2V/div) 1.2 1.0 0.8 0.6 0.4 0.2 0 DOMINANT RECESSIVE
MAX13051 toc18
1.4
MAX13052
TXD (5V/div) VDIFF (2V/div) RRS = 24k VDIFF (2V/div) RRS = 75k VDIFF (2V/div) RRS = 100k 1.00s 200ns/div
VDIFF (1V/div)
0
20 40 60 80 100 120 140 160 180 200 RRS (k)
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
Pin Description
PIN
MAX13050/MAX13052/MAX13053/MAX13054
MAX13050
MAX13052
MAX13053
MAX13054
NAME
FUNCTION
1 2 3 4
1 2 3 4
1 2 3 4
1 2 3 4
TXD GND VCC RXD
Transmit Data Input. TXD is a CMOS/TTL-compatible input from a CAN controller with a 25k pullup to VCC. For the MAX13054, TXD is pulled to VCC2. Ground Supply Voltage. Bypass VCC to GND with a 0.1F capacitor. Receive Data Output. RXD is a CMOS/TTL-compatible output from the physical bus lines CANH and CANL. For the MAX13054, RXD output voltage is referenced to the VCC2 supply voltage. Common-Mode Stabilization Output. Output equaled to 0.5 x VCC. SPLIT goes high impedance in standby mode . CAN Bus-Line Low CAN Bus-Line High Standby Input. Drive STBY low for high-speed operation. Drive STBY high to place the device in low-current standby mode. Mode-Select Input. Drive RS low or connect to GND for high-speed operation. Connect a resistor between RS and GND to control output slope. Drive RS high to put into standby mode. Reference Output Voltage. Always on reference output voltage, set to 0.5 x VCC. Silent-Mode Input. Drive S low to enable TXD and to operate in high-speed mode. Drive S high to disable the transmitter. Logic-Supply Input. VCC2 is the logic supply voltage for the input/output between the CAN transceiver and microprocessor. VCC2 allows fully compatible +3.3V logic on all digital lines. Bypass to GND with a 0.1F capacitor. Connect VCC2 to VCC for 5V logic compatibility.
5 6 7 8
5 6 7 --
-- 6 7 --
-- 6 7 8
SPLIT CANL CANH STBY
-- -- --
8 -- --
-- 5 8
-- -- --
RS REF S
--
--
--
5
VCC2
Detailed Description
The MAX13050/MAX13052/MAX13053/MAX13054 80V fault-protected CAN transceivers are ideal for automotive and industrial network applications where overvoltage protection is required. These devices provide a link between the CAN protocol controller and the physical wires of the bus lines in a control area network (CAN). These devices can be used for +12V and +42V battery automotive and DeviceNet applications, requiring data rates up to 1Mbps. The MAX13050/MAX13052/MAX13053/MAX13054 dominant timeout prevents the bus from being blocked
by a hungup microcontroller. If the TXD input is held low for greater than 1ms, the transmitter becomes disabled, driving the bus line to a recessive state. The MAX13054 +3.3V logic input allows the device to communicate with +3.3V logic, while operating from a +5V supply. The MAX13050 and MAX13052 provide a split DC-stabilized voltage. The MAX13053 has a reference output that can be used to bias the input of a CAN controller's differential comparator. All devices can operate up to 1Mbps (high-speed mode). The MAX13052 slope-control feature allows the user to program the slew rate of the transmitter for data
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
rates of up to 500kbps. This reduces the effects of EMI, thus allowing the use of unshielded-twisted or parallel cable. The MAX13050/MAX13052 and MAX13054 standby mode shuts off the transmitter and switches the receiver to a low-current/low-speed state. The MAX13050/MAX13052/MAX13053/MAX13054 input common-mode range is greater than 12V, exceeding the ISO11898 specification of -2V to +7V, and feature 8kV Contact Discharge protection, making these devices ideal for harsh automotive and industrial environments.
Table 1. Mode Selection Truth Table MAX13052
CONDITION FORCED AT RS VRS or 0.3 x VCC 0.4 x VCC VRS 0.6 x VCC VRS 0.75 x VCC MODE High-Speed Slope Control Standby RESULTING CURRENT AT RS |IRS| 500A 10A |IRS| 200A |IRS| 10A
80V Fault Protected
The MAX13050/MAX13052/MAX13053/MAX13054 feature 80V fault protection. This extended voltage range of CANH, CANL, and SPLIT allows use in high-voltage systems and communication with high-voltage buses.
Drive STBY high for standby mode operation for the MAX13050 and MAX13054. Apply a logic-high to RS to enter a low-current standby mode for the MAX13052. Silent Mode S (MAX13053) Drive S high to place the MAX13053 in silent mode. When operating in silent mode, the transmitter is disabled regardless of the voltage level at TXD. RXD however, still monitors activity on the bus line.
Operating Modes
High-Speed Mode The MAX13050/MAX13052/MAX13053/MAX13054 can achieve transmission rates of up to 1Mbps when operating in high-speed mode. Drive STBY low to operate the MAX13050 and MAX13054 in high-speed operation. Connect RS to ground to operate the MAX13052 in high-speed mode. Slope-Control Mode (MAX13052) Connect a resistor from RS to ground to select slopecontrol mode (Table 1). In slope-control mode, CANH and CANL slew rates are controlled by the resistor (16k R RS 200k) connected between RS and GND. Controlling the rise and fall slopes reduces highfrequency EMI and allows the use of an unshieldedtwisted pair or a parallel pair of wires as bus lines. The slew rate can be approximated using the formula below: SR(V / s) = 250 RRS
Common-Mode Stabilization (SPLIT)
SPLIT provides a DC common-mode stabilization voltage of 0.5 x V CC when operating in normal mode. SPLIT stabilizes the recessive voltage to 0.5 x VCC for conditions when the recessive bus voltage is lowered, caused by an unsupplied transceiver in the network with a significant leakage current from the bus lines to ground. Use SPLIT to stabilize the recessive commonmode voltage by connecting SPLIT to the center tap of the split termination, see the Typical Operating Circuit. In standby mode or when VCC = 0, SPLIT becomes high impedance.
Reference Output (MAX13053)
MAX13053 has a reference voltage output (REF) set to 0.5 x VCC. REF can be utilized to bias the input of a CAN controller's differential comparator, and to provide power to external circuitry.
where, SR is the desired slew rate and RRS is in k. Standby Mode (MAX13050/MAX13052/MAX13054) In standby mode (RS or STBY = high), the transmitter is switched off and the receiver is switched to a low-current/low-speed state. The supply current is reduced during standby mode. The bus line is monitored by a low-differential comparator to detect and recognize a wake-up event on the bus line. Once the comparator detects a dominant bus level greater than tWAKE, RXD pulls low.
Transmitter
The transmitter converts a single-ended input (TXD) from the CAN controller to differential outputs for the bus lines (CANH, CANL). The truth table for the transmitter and receiver is given in Table 2.
TXD Dominant Timeout
The CAN transceivers provide a transmitter dominant timeout function that prevents erroneous CAN controllers from clamping the bus to a dominant level by a continuous low TXD signal. When the TXD remains low for the 1ms maximum timeout period, the transmitter becomes disabled, thus driving the bus line to a recessive state
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Table 2. Transmitter and Receiver Truth Table (MAX13052)
TXD Low High or Float X RS VRS 0.75 x VCC VRS 0.75 x VCC VRS 0.75 x VCC CANH High VCC / 2 RICM to GND CANL Low VCC / 2 RICM to GND BUS STATE Dominant Recessive Recessive RXD Low High High
Table 3. Transmitter and Receiver Truth Table (MAX13053)
TXD Low High or Float X RS VS < 0.8V VS < 0.8V VS > 2V CANH High VCC / 2 VCC / 2 CANL Low VCC / 2 VCC / 2 BUS STATE Dominant Recessive Recessive RXD Low High High
(MAX13050/MAX13054)
TXD Low High or Float X STBY VSTBY 0.8V *VSTBY 0.3 x VCC2 VSTBY 0.8V *VSTBY 0.3 x VCC2 VSTBY 2V *VSTBY 0.7 x VCC2 CANH High VCC / 2 RICM to GND CANL Low VCC / 2 RICM to GND BUS STATE Dominant Recessive Recessive RXD Low High High
*For the MAX13054
tDOM TRANSMITTER ENABLED TXD
The CANH and CANL common-mode range is greater than 12V. RXD is logic-high when CANH and CANL are shorted or terminated and undriven.
+3.3V Logic Compatibility (MAX13054)
A separate input, VCC2, allows the MAX13054 to communicate with +3.3V logic systems while operating from a +5V supply. This provides a reduced input voltage threshold to the TXD and STBY inputs, and provides a logic-high output at RXD compatible with the microcontroller's system voltage. The logic compatibility eliminates longer propagation delay due to level shifting. Connect VCC2 to VCC to operate the MAX13054 with +5V logic systems.
VCANH - VCANL
TRANSMITTER DISABLED
Figure 3. Transmitter Dominant Timeout Timing Diagram
(Figure 3). The transmitter becomes enabled upon detecting a rising edge at TXD.
Driver Output Protection
The current-limiting feature protects the transmitter output stage against a short circuit to a positive and negative battery voltage. Although the power dissipation increases during this fault condition, current-limit protection prevents destruction of the transmitter output stage. Upon removal of a short, the CAN transceiver resumes normal operation.
Receiver
The receiver reads differential inputs from the bus lines (CANH, CANL) and transfers this data as a singleended output (RXD) to the CAN controller. It consists of a comparator that senses the difference V DIFF = (CANH - CANL) with respect to an internal threshold of 0.7V. If this difference is positive (i.e., VDIFF > 0.7), a logic-low is present at RXD. If negative (i.e., VDIFF < 0.7V), a logic-high is present.
Thermal Shutdown
If the junction temperature exceeds +165C, the driver is switched off. The hysteresis is approximately 13C,
11
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
MAX13052
CANH TXD RXD SPLIT RL = 60 CANL STUB LENGTH KEEP AS SHORT AS POSSIBLE RL = 60 TRANSCEIVER 3 TWISTED PAIR RL = 120
TRANSCEIVER 1
TRANSCEIVER 2
Figure 4. Multiple Receivers Connected to CAN Bus
disabling thermal shutdown once the temperature drops below +152C. In thermal shutdown, CANH and CANL go recessive. After a thermal-shutdown event, the IC resumes normal operation when the junction temperature drops below the thermal-shutdown hysteresis, and upon the CAN transceiver detecting a rising edge at TXD.
RC 50M to 100M CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
RD 330k DISCHARGE RESISTANCE DEVICE UNDER TEST
Applications Information
Reduced EMI and Reflections
In slope-control mode, the MAX13052's CANH and CANL outputs are slew-rate limited, minimizing EMI and reducing reflections caused by improperly terminated cables. In multidrop CAN applications, it is important to maintain a direct point-to-point wiring scheme. A single pair of wires should connect each element of the CAN bus, and the two ends of the bus should be terminated with 120 resistors, see Figure 4. A star configuration should never be used. Any deviation from the point-to-point wiring scheme creates a stub. The high-speed edge of the CAN data on a stub can create reflections back down the bus. These reflections can cause data errors by eroding the noise margin of the system. Although stubs are unavoidable in a multidrop system, care should be taken to keep these stubs as small as possible, especially in high-speed mode. In slope-control mode, the requirements are not as rigorous, but stub length should still be minimized.
Cs 150pF
STORAGE CAPACITOR
Figure 5. IEC 61000-4-2 Contact Discharge ESD Test Model
I 100% 90%
I PEAK
10% t r = 0.7ns to 1ns t 30ns 60ns
Layout Consideration
CANH and CANL are differential signals and steps should be taken to insure equivalent parasitic capaci12
Figure 6. IEC 61000-4-2 ESD Test Model Current Waveform
______________________________________________________________________________________
Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
tance. Place the resistor at RS as close as possible to the MAX13052 to minimize any possible noise coupling at the input. MAX13054 continue working without latchup. ESD protection can be tested in several ways. The CANH and CANL inputs are characterized for protection to 8kV using the IEC 61000-4-2 Contact Discharge Method per IBEE Test facility.
MAX13050/MAX13052/MAX13053/MAX13054
Power Supply and Bypassing
The MAX13050/MAX13052/MAX13053/MAX13054 require no special layout considerations beyond common practices. Bypass VCC and VCC2 to GND with a 0.1F ceramic capacitor mounted close to the IC with short lead lengths and wide trace widths.
ESD Test Conditions
ESD performance depends on a number of conditions. Contact Maxim for a reliability report that documents test setup, methodology, and results.
ESD Protection
ESD-protection structures are incorporated on CANH and CANL to protect against ESD encountered during handling and assembly. CANH and CANL inputs have extra protection to protect against static electricity found in normal operation. Maxim's engineers have developed state-of-the-art structures to protect these pins against 8kV ESD Contact Discharge without damage. After an ESD event, the MAX13050/MAX13052/MAX13053/
Human Body Model
Figure 5 shows the IEC 61000-4-2 Contact Discharge Model, and Figure 6 shows the current waveform it generates when discharged into a low impedance. This model consists of a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the device through a 1.5k resistor.
______________________________________________________________________________________
13
Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Functional Diagrams
VCC
MAX13050
R SPLIT THERMAL SHUTDOWN R
TXD
DOMINANT TIMEOUT
DRIVER
CANH
CANL
STBY
WAKE-UP MODE CONTROL
GND WAKE-UP FILTER RXD MUX
14
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
Functional Diagrams (continued)
VCC
MAX13050/MAX13052/MAX13053/MAX13054
MAX13052
R SPLIT THERMAL SHUTDOWN R
TXD
TIMEOUT AND SLOPECONTROL MODE
DRIVER
CANH
CANL RS
WAKE-UP MODE CONTROL
GND WAKE-UP FILTER RXD MUX
______________________________________________________________________________________
15
Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Functional Diagrams (continued)
VCC
MAX13053
R REF R THERMAL SHUTDOWN
S
TXD
DOMINANT TIMEOUT
DRIVER
CANH
CANL RS
WAKE-UP MODE CONTROL
GND WAKE-UP FILTER RXD MUX
16
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
Functional Diagrams (continued)
VCC
MAX13050/MAX13052/MAX13053/MAX13054
MAX13054
THERMAL SHUTDOWN VCC2
CANH
TXD
DOMINANT TIMEOUT
DRIVER
CANL
STBY
WAKE-UP MODE CONTROL
GND WAKE-UP FILTER VCC2 MUX
RXD
DRIVER
______________________________________________________________________________________
17
Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Typical Operating Circuits
0.1F VCC 0.1F VCC
TO BUS VCC CAN CONTROLLER TXO RXO CANH 60 CAN CONTROLLER TXO RXO 4.7nF 60 I/O GND STBY GND CANL GND I/O
TO BUS VCC CANH 60
MAX13050 TXD
RXD SPLIT
MAX13052 TXD
RXD SPLIT
4.7nF 60
STBY GND CANL
0.1F VCC
0.1F VCC
TO BUS VCC CAN CONTROLLER TXO RXO I/O CANH 60 CAN CONTROLLER TXO 4.7nF 60 CANL GND 0.1F RXO I/O +3.3V LOGIC GND CANL VCC CANH 60
TO BUS
MAX13053 TXD
RXD S REF
MAX13054 TXD
RXD STBY
4.7nF 60
GND
GND
18
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Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection
Pin Configurations
TOP VIEW
MAX13050/MAX13052/MAX13053/MAX13054
TXD 1 GND VCC 2
8 7
STBY CANH CANL SPLIT
TXD 1 GND VCC 2
8 7
RS CANH CANL SPLIT
MAX13050
3 6 5 3 RXD 4 RXD 4
MAX13052
6 5
SO
SO
TXD 1 GND VCC 2
8 7
S CANH CANL REF
TXD 1 GND VCC 2
8 7
STBY CANH CANL VCC2
MAX13053
3 6 5 3 RXD 4 RXD 4
MAX13054
6 5
SO
SO
Chip . TRANSISTOR COUNT: 1400 PROCESS: BiCMOS
Information
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19
Industry-Standard High-Speed CAN Transceivers with 80V Fault Protection MAX13050/MAX13052/MAX13053/MAX13054
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
INCHES DIM A A1 B C e E H L MAX MIN 0.069 0.053 0.010 0.004 0.014 0.019 0.007 0.010 0.050 BSC 0.150 0.157 0.228 0.244 0.016 0.050
MILLIMETERS MAX MIN 1.35 1.75 0.10 0.25 0.35 0.49 0.19 0.25 1.27 BSC 3.80 4.00 5.80 6.20 0.40 1.27
N
E
H
VARIATIONS:
1
INCHES
MILLIMETERS MIN 4.80 8.55 9.80 MAX 5.00 8.75 10.00 N MS012 8 AA 14 AB 16 AC
TOP VIEW
DIM D D D
MIN 0.189 0.337 0.386
MAX 0.197 0.344 0.394
D A e B A1 L C
0-8
FRONT VIEW
SIDE VIEW
PROPRIETARY INFORMATION TITLE:
PACKAGE OUTLINE, .150" SOIC
APPROVAL DOCUMENT CONTROL NO. REV.
21-0041
B
1 1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
20 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products, Inc.
SOICN .EPS

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