AMIS-43 High-Speed 3.3 V Digital Interface CAN Transceiver Description The AMIS 43 CAN transceiver is the interface between a controller area network (CAN) protocol controller and the physical bus. It may be used in both V and 4 V systems. The digital interface level is powered from a 3.3 V supply providing true I/O voltage levels for 3.3 V CAN controllers. The transceiver provides differential transmit capability to the bus and differential receive capability to the CAN controller. Due to the wide common mode voltage range of the receiver inputs, the AMIS 43 is able to reach outstanding levels of electromagnetic susceptibility (EMS). Similarly, extremely low electromagnetic emission (EME) is achieved by the excellent matching of the output signals. The AMIS 43 is primarily intended for applications where long network lengths are mandatory. Examples are elevators, in building networks, process control and trains. To cope with the long bus delay the communication speed needs to be low. AMIS 43 allows low transmit data rates down to 0 kbit/s or lower. Features True 3.3 V or.0 V Logic Level Interface Fully Compatible with the ISO 898 Standard Wide Range of Bus Communication Speed (0 up to Mbit/s) Allows Low Transmit Data Rate in Networks Exceeding km Ideally Suited for V and 4 V Applications Low Electromagnetic Emission (EME); Common Mode Choke is No Longer Required Differential Receiver with Wide Common Mode Range ( 3 V) for High Electromagnetic Susceptibility (EMS) No Disturbance of the Bus Lines with an Unpowered Node Thermal Protection Bus Pins Protected Against Transients Short Circuit Proof to Supply Voltage and Ground ESD Protection for CAN Bus at 8 kv These are Pb Free Devices* RxD 3 4 PIN ASSIGNMENT AMIS 43 (Top View) 8 V REF PC00003. ORDERING INFORMATION See detailed ordering and shipping information in the package dimensions section on page 0 of this data sheet. *For additional information on our Pb Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. Semiconductor Components Industries, LLC, 009 January, 009 Rev. 3 Publication Order Number: AMIS 43/D
Table. TECHNICAL CHARACTERISTICS Symbol Parameter Condition Max Max Unit V DC Voltage at Pin 0 < <. V; No Time Limit 4 +4 V V DC Voltage at Pin 0 < <. V; No Time Limit 4 +4 V V o(dif)(bus_dom) Differential Bus Output Voltage in Dominant State 4. < R LT < 0. 3 V t pd(rec dom) Propagation Delay to RxD 00 30 ns t pd(dom rec) Propagation Delay to RxD 00 4 ns C M range Input Common Mode Range for Comparator Guaranteed Differential Receiver Threshold and Leakage Current 3 +3 V V CM peak Common Mode Peak Figures and 8 (Note ) 00 00 mv V CM step Common Mode Step Figures and 8 (Note ) 0 0 mv. The parameters V CM peak and V CM step guarantee low EME. AMIS 43 Thermal shutdown 3 8 S Driver control RxD 4 COMP R i(cm) V cc / + V REF R i(cm) PC00003. Figure. Block Diagram Table. PIN DESCRIPTION Pin Name Description Transmit Data Input; Low Input Dominant Driver; Internal Pullup Current Ground 3 Supply Voltage 4 RxD Receive Data Output; Dominant Transmitter Low Output V REF Reference Voltage Output LOW Level CAN Bus Line (Low in Dominant Mode) HIGH Level CAN Bus Line (High in Dominant Mode) 8 3.3 V Supply for Digital I/O
Table 3. ABSOLUTE MAXIMUM RATINGS Symbol Parameter Conditions Min Max Unit Supply Voltage 0.3 + V I/O Interface Voltage 0.3 + V V DC Voltage at Pin 0 < <. V; No Time Limit 4 +4 V V DC Voltage at Pin 0 < <. V; No Time Limit 4 +4 V V DC Voltage at Pin 0.3 + 0.3 V V RxD DC Voltage at Pin RxD 0.3 + 0.3 V V REF DC Voltage at Pin V REF 0.3 + 0.3 V V tran() Transient Voltage at Pin Note 0 +0 V V tran() Transient Voltage at Pin Note 0 +0 V V tran(vref) Transient Voltage at Pin V REF Note 0 +0 V V esd(/ ) Electrostatic Discharge Voltage at and Pin Note 4 Note 8 00 +8 +00 kv V V esd Electrostatic Discharge Voltage at All Other Pins Note 4 Note 4 0 + 4 +0 kv V Latch up Static Latch up at All Pins Note 00 ma T stg Storage Temperature + C T A Ambient Temperature 40 + C T J Maximum Junction Temperature 40 +0 C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability.. Applied transient waveforms in accordance with ISO 3 part 3, test pulses,, 3a, and 3b (see Figure 4). 3. Standardized human body model system ESD pulses in accordance to IEC 000.4.. 4. Standardized human body model ESD pulses in accordance to MIL883 method 30. Supply pin 8 is ±4kV.. Static latch up immunity: static latch up protection level when tested according to EIA/JESD8.. Standardized charged device model ESD pulses when tested according to EOS/ESD DS.3 993. Table 4. THERMAL CHARACTERISTICS Symbol Parameter Conditions Value Unit R th(vj a) R th(vj s ) Thermal Resistance from Junction to Ambient in SO 8 Package Thermal Resistance from Junction to Substrate of Bare Die In Free Air 4 k/w In Free Air 4 k/w 3
APPLICATION INFORMATION VBAT IN V reg OUT 0 0 4 nf IN 3.3V reg OUT CAN BUS PC00003.3 CAN controller RxD 4 8 AMIS 43 3 VREF 0 0 4 nf Figure. Application Diagram 4
FUNCTIONAL DESCRIPTION General The AMIS 43 is the interface between the CAN protocol controller and the physical bus. It is intended for use in industrial and automotive applications requiring baud rates up to Mbit/s. It provides differential transmit capability to the bus and differential receiver capability to the CAN protocol controller. It is fully compatible to the ISO 898 standard. Operating Modes AMIS 43 only operates in high speed mode as illustrated in Table. The transceiver is able to communicate via the bus lines. The signals are transmitted and received to the CAN controller via the pins and RxD. The slopes on the bus lines outputs are optimized to give extremely low EME. Table. FUNCTIONAL TABLE OF AMIS 43; x = don t care Pin Pin Pin Bus State Pin RxD 4. to. V 0 High Low Dominant 0 4. to. V (or floating) / / Recessive < PORL (Unpowered) x 0 V < < 0 V < < Recessive PORL < < 4. V > V 0 V < < 0 V < < Recessive Overtemperature Detection A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds a value of approximately 0 C. Because the transmitter dissipates most of the power, the power dissipation and temperature of the IC is reduced. All other IC functions continue to operate. The transmitter off state resets when Pin goes HIGH. The thermal protection circuit is particularly needed when a bus line short circuits. High Communication Speed Range The transceiver is primarily intended for industrial applications. It allows very low baud rates needed for long bus length applications. But also high speed communication is possible up to Mbit/s. Fail Safe Features A current limiting circuit protects the transmitter output stage from damage caused by accidental short circuit to either positive or negative supply voltage although power dissipation increases during this fault condition. The pins and are protected from automotive electrical transients (according to ISO 3 ; see Figure 3). Should become disconnected, this pin is pulled high internally. When the supply is removed, Pins and RxD will be floating. This prevents the AMIS 43 from being supplied by the CAN controller through the I/O Pins. 3.3 V Interface AMIS 43 may be used to interface with 3.3 V or V controllers by use of the pin. This pin may be supplied with 3.3 V or V to have the corresponding digital interface voltage levels. When the pin is supplied at. V, even interfacing with. V CAN controllers is possible. See also Digital Output Characteristics @ =. V, Table. In this case a pull up resistor from to is necessary.
Definitions All voltages are referenced to (Pin ). Positive currents flow into the IC. Sinking current means that the current is flowing into the pin. Sourcing current means that the current is flowing out of the pin. Table. DC CHARACTERISTICS = 4. V to. V, =.9 V to 3. V; T J = 40 C to +0 C; R LT = 0 unless specified otherwise. Symbol Parameter Conditions Min Typ Max Unit SUPPLY (Pin and pin ) I CC Supply Current Dominant; V TXD = 0 V 4 Recessive; V TXD = 4 I 33 I/O Interface Current = 3.3 V; C L = 0 pf; recessive I 33 I/O Interface Current (Note ) = 3.3 V; C L = 0pF; Mbps 8 ma A 0 A TRANSMITTER DATA INPUT (Pin ) V IH HIGH Level Input Voltage Output recessive.0 V V IL LOW Level Input Voltage Output dominant 0.3 +0.8 V I IH HIGH Level Input Current V = 0 + A I IL LOW Level Input Current V = 0 V 0 00 300 A C i Input Capacitance (Note ) 0 pf RECEIVER DATA OUTPUT (Pin RxD) V OH HIGH Level Output Voltage I RXD = 0 ma 0. x 0. x V V OL LOW Level Output Voltage I RXD = ma 0.8 0.3 V I oh HIGH Level Output Current (Note ) V RxD = 0. x 0 0 ma I ol LOW Level Output Current (Note ) V RxD = 0.4 V 0 ma REFERENCE VOLTAGE OUTPUT (Pin V REF ) V REF Reference Output Voltage 0 A < I VREF < +0 A 0.4 x V REF_CM Reference Output Voltage for Full Common Mode Range 3 V < V < +3 V; 3 V < V < +3 V 0.40 x 0.0 x 0.0 x 0. x 0.0 x BUS LINES (Pins and ) V o(reces)() Recessive Bus Voltage at Pin V = ; no load.0. 3.0 V V o(reces)() Recessive Bus Voltage at Pin V = ; no load.0. 3.0 V I o(reces)() Recessive Output Current at Pin 3 V < V < +3 V; 0 V < <. V. +. ma I o(reces)() Recessive Output Current at Pin 3 V < V < +3 V; 0 V < <. V. +. ma V o(dom)() Dominant Output Voltage at Pin V = 0 V 3.0 3. 4. V V o(dom)() Dominant Output Voltage at Pin V = 0 V 0..4. V V o(dif)(bus) Differential Bus Output Voltage (V V ) V = 0 V; Dominant; 4. < R LT < 0 V = ; Recessive; No Load.. 3.0 V 0 0 +0 mv I o(sc) () Short Circuit Output Current at Pin V = 0 V; V = 0 V 4 0 9 ma I o(sc) () Short Circuit Output Current at Pin V = 3 V; V = 0 V 4 0 0 ma V i(dif)(th) Differential Receiver Threshold Voltage V < V < + V; V < V < + V; See Figure 4. Not tested at ATE 0. 0. 0.9 V V V
Table. DC CHARACTERISTICS = 4. V to. V, =.9 V to 3. V; T J = 40 C to +0 C; R LT = 0 unless specified otherwise. Symbol Parameter BUS LINES (Pins and ) V ihcm(dif)(th) Differential Receiver Threshold Voltage for High Common Mode Conditions 3 V < V < +3 V; 3 V < V < +3 V; See Figure 4 V i(dif)(hys) Differential Receiver Input Voltage Hysteresis 3 V < V < +3 V; 3 V < V < +3 V; See Figure 4 R i(cm)() R i(cm) () R i(cm)(m) Common Mode Input Resistance at Pin Common Mode Input Resistance at Pin Matching Between Pin and Pin Common Mode Input Resistance Min Typ Max Unit 0. 0..0 V 0 0 00 mv 3 k 3 k V = V 3 0 +3 % R i(dif) Differential Input Resistance 0 k BUS LINES (Pins and ) C i() Input Capacitance at Pin V = ; Not Tested. 0 pf C i() Input Capacitance at Pin V = ; Not Tested. 0 pf C i(dif) Differential Input Capacitance V = ; Not Tested 3. 0 pf I LI() Input Leakage Current at Pin = 0 V; V = V 0 0 0 A I LI() Input Leakage Current at Pin = 0 V; V = V 0 0 0 A V CM peak V CM step Common Mode Peak During Transition from Dom Rec or Rec Dom Difference in Common Mode Between Dominant and Recessive State POWER ON RESET PORL POR Level,, V ref in Tri State Below POR Level Figures and 8 00 00 mv Figures and 8 0 0 mv. 3. 4. V THERMAL SHUTDOWN T J(sd) Shutdown Junction Temperature 0 0 80 C TIMING CHARACTERISTICS (See Figures and ) t d( BUSon) Delay to Bus Active 40 8 0 ns t d( BUSoff) Delay to Bus Inactive 30 0 0 ns t d(buson RxD) Delay Bus Active to RxD 0 ns t d(busoff RxD) Delay Bus Inactive to RxD 00 3 ns t pd(rec dom) t d(dom rec). Not tested at ATE Propagation Delay to RxD from Recessive to Dominant Propagation Delay to RxD from Dominant to Recessive 00 30 ns 00 4 ns Table. DIGITAL OUTPUT CHARACTERISTICS @ =. V = 4. to. V; =. V %; T J = 40 to +0 C; R LT = 0 unless specified otherwise. Symbol Parameter Conditions Min Typ Max Unit RECEIVER DATA OUTPUT (Pin RxD) I oh HIGH Level Output Current V OH > 0.9 x. ma I ol LOW Level Output Current V OL < 0. x 4 ma
MEASUREMENT SETUPS AND DEFINITIONS +3.3 V + V 00 nf 0 pf RxD 4 AMIS 43 3 8 00 nf nf V REF nf Transient Generator PC00003.4 Figure 3. Test Circuit for Automotive Transients V RxD High Low PC004089. Hysteresis 0. 0.9 Figure 4. Hysteresis of the Receiver V i(dif)(hys) +3.3 V + V 00 nf 00 nf 0 pf RxD 4 3 8 AMIS 43 R LT V REF C LT 00 pf 0 PC00003. Figure. Test Circuit for Timing Characteristics 8
HIGH LOW V i(dif) = V V 0.9V 0.V dominant recessive RxD 0.3 x 0. x t d( BUSon) t d( BUSoff) td(buson RxD) td(busoff RxD) t pd(rec dom) t pd(dom rec) PC004089. Figure. Timing Diagram for AC Characteristics +3.3 V + V 00 nf Generator 3 8 AMIS 43. k 0 nf. k Active Probe Spectrum Anayzer RxD 4 30 30 V REF 0 pf 4 nf Figure. Basic Test Setup for Electromagnetic Measurement PC00003. V CM = 0.*(V +V ) V CM step V CM peak recessive V CM peak PC004089. Figure 8. Common Mode Voltage Peaks (See Measurement Setup Figure ) 9
DEVICE ORDERING INFORMATION Part Number Temperature Range Package Type Shipping AMIS43ICAGG 40 C C SOIC 8 (Pb Free) 9 Tube / Tray AMIS43ICAGRG 40 C C SOIC 8 (Pb Free) 3000 / Tape & Reel For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD80/D. 0
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