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| Features * * * * * * * * * * Usable for Automotive 12 V/24 V and Industrial Applications Maximum High-speed Data Transmissions up to 1 MBaud Fully Compatible with ISO 11898 Controlled Slew Rate Standby Mode TXD Input Compatible to 3.3 V Short-circuit Protection Overtemperature Protection High Voltage Bus Lines Protection, -40 V to +40 V High Speed Differential Receiver Stage with a Wide Common Mode Range, -10 V to +10 V, for High Electromagnetic Immunity (EMI) * Fully Controlled Bus Lines, CANH and CANL to Minimize Electromagnetic Emissions (EME) * High ESD Protection at CANH, CANL HBM 8 kV, MM 300 V High-speed CAN Transceiver ATA6660 Description The ATA6660 is a monolithic circuit based on the Atmel's Smart Power BCD60-III technology. It is especially designed for high speed CAN-Controller (CAN-C) differential mode data transmission between CAN-Controllers and the physical differential bus lines. Figure 1. Block Diagram 3 VCC 1 TXD TXD input stage Overtemperature and Short circuit protection Driver 7 CANH 8 RS Constant slope/ standby 4 RXD Reference Voltage 0.5*VCC Receiver 6 CANL 5 VREF 2 GND Rev. 4582B-BCD-03/03 1 Pin Configuration Figure 2. Pinning SO8 TXD GND VCC RXD 1 2 3 4 8 7 6 5 RS CANH CANL VREF Pin Description Pin 1 2 3 4 5 6 7 8 Symbol TXD GND VCC RXD VREF CANL CANH RS Function Transmit data input Ground Supply voltage Receive data output Reference voltage output Low level CAN voltage input/output High level CAN voltage input/output Switch standby mode/normal mode Functional Description The ATA6660 is a monolithic circuit based on Atmel's Smart Power BCD60-III technology. It is especially designed for high-speed differential mode data transmission in harsh environments like automotive and industrial applications. Baudrate can be adjusted up to 1 Mbaud. The ATA6660 is fully compatible to the ISO11898, the developed standard for high speed CAN-C (Controller Area Network) communication. High voltage protection circuitry on both line pins, CANH (Pin 7) and CANL (Pin 6), allow bus line voltages in the range of -40 V to +40 V. ESD protection circuitry on line pins allow HBM = 8 kV, MM = 300 V. The implemented high voltage protection on bus line output/input pins (7/6) makes the ATA6660 suitable for 12 V automotive applications as well as 24 V automotive applications. A fixed slope is adjusted to prevent unsymmetrical transients on bus lines causing EMC problems. Controlled bus lines, both CANH and CANL signal, will reduce radio frequency interference to a minimum. In well designed bus configurations the filter design costs can be reduced dramatically. In the case of a line shorts, like CANH to GND, CANL to VCC, integrated short current limitation allows a maximum current of ICANH_SC or ICANL_SC. If junction temperature rises above 165C an internal overtemperature protection circuitry shuts down both output stages, the receiver will stay activated. Voltage Protection and ESD Slope Control Overcurrent Protection 2 ATA6660 4582B-BCD-03/03 ATA6660 Standby Mode The ATA6660 can be switched to standby mode by forcing the voltage VRS > 0.87 VCC. In standby mode the supply current will reduce dramatically, supply current during standby mode is typical 600 A (IVCC_stby). Transmitting data function will not be supported, but the oppertunity will remain to receive data. A high-speed comparator is listening for activities on the bus. A dominant bus signal will force the output RXD to a low level in typical tdRXDL = 400 ns. If the RS pin is not connected, causing through a broken connection to the controller, the ATA6660 will switch to standby mode automatically. In normal mode a fast receiver circuitry combined with a resistor network is able to detect differential bus line voltages Vrec_th > 0.9 V as dominant bit, differential bus line voltages Vrec_th < 0.5 V as recessive bit. The wide receiver common mode range, -10 V to +10 V, combined with a symmetrical differential receiver stage offers high immunity against electromagnetic interference. A typical hysteresis of 70 mV is implemented. Dominant differential bus voltages forces RXD output (Pin 4) to low level, recessive differential bus voltages to high level. High-speed Receiver TXD Input The input stage Pin 1 (TXD) is compatible for 3.3 V output levels from new controller families. Pull-up resistance (25 kW) forces the IC to recessive mode, if TXD-Pin is not connected. TXD low signal drives the transmitter into dominant state. A integrated complex compensation technique allows stable data transmission up to 1 MBaud. Low level on TXD input forces bus line voltages CANH to 3.5 V, CANL to 1.5 V with a termination resistor of 60 W. In the case of a line short circuit, like CANH to GND, CANL to VCC, integrated short current limitation circuitry allows a maximum current of 150 mA. If junction temperature rises above typical 163C an internal overtemperature protection shuts down both output stages, the receive mode will stay activated. With a modified bus termination (see Figure 5) a reduction of emission and a higher immunity of the bus system can be achieved. The one 120 W resistor at the bus line end nodes is split into two resistors of equal value, i.e., two resistors of 60 W. The resistors for the stub nodes is recommended with two resistors of 1,3 kW. (for example 8 stub nodes and 2 bus end nodes) Notice: The bus load of all the termination resistors has to stay within the range of 50 W to 65 W. The common mode signal at the centre tap of the termination is connected to ground via a capacitor of e.g., Csplit = 10 nF to 100 nF. A seperate ground lead to the ground pin of the module connector is recommended. Transmitter Split Termination Concept 3 4582B-BCD-03/03 Absolute Maximum Ratings Parameters Supply voltage DC voltage at Pins 1, 4, 5 and 8 DC voltage at Pins 6 and 7 Transient voltage at Pins 6 and 7 Storage temperature Operating ambient temperature ESD classification ESD classification TStg Tamb All pins Pin 6, 7 versus Pin 2 HBM ESD S.5.1 MM JEDEC A115A HBM 1.5 kW, 100 pF MM 0W, 200 pF Symbol VCC VTXD, VREF, VRS, VRXD VCANH, VCANL 0 V < VCC < 5.25 V; no time limit Conditions Min. -0.3 -0.3 -40.0 -150 -55 -40 3000 200 8000 300 Max. +6 VCC +0.3 +40.0 +100 +150 +125 Unit V V V V C C V V V V Thermal Resistance Parameters Thermal resistance from junction to ambient Symbol RthJA Value 160 Unit K/W Truth Table VCC 4.75 V to 5.25 V 4.75 V to 5.25 V 4.75 V to 5.25 V TXD 0 1 (or floating) X RS < 0.3 VCC < 0.3 VCC > 0.87 VCC CANH 3.5 V 0.5 VCC 0.5 VCC CANL 1.5 V 0.5 VCC 0.5 VCC Bus State Dominant Recessive Recessive RXD 0 1 1 RS (Pin 8) Functionality Slope Control Mode Standby Constant slope control Voltage and Current Levels IRS < | 10 A | IRS 500 A VRS > 0.87 VCC VRS < 0.3 VCC 4 ATA6660 4582B-BCD-03/03 ATA6660 Electrical Characteristics VCC = 4.75 V to 5.25 V; Tamb = -40C to +125C; RBus = 60 ; unless otherwise specified All voltages referenced to ground (Pin 2); positive input current. No. 1 1.1 1.2 1.3 2 2.1 2.2 2.3 2.4 3 3.1 3.2 3.3 3.4 4 4.1 4.2 5 5.1 Parameters Supply Current Supply current dominant Supply current recessive Supply current standby HIGH level input voltage LOW level input voltage HIGH level input current LOW level input voltage High level output voltage Low level output voltage Short current at RXD Short current at RXD VTXD = 0 V VRS = 0 V VTXD = 5 V VRS = 0 V VRS = 5 V 3 3 3 Ivcc_dom Ivcc_rec Ivcc_stby 45 10 600 60 15 980 mA mA A A A Test Conditions Pin Symbol Min. Typ. Max. Unit Type* A Transmitter Data Input TXD VTXD = 5 V VRS = 0 V VTXD = 0 V VRS = 0 V VTXD = VCC VTXD = 0 V 1 1 1 1 VTXDH VTXDL IIH IIL 2 -0.3 -1 -500 VCC+0.3 +1 0 -50 V V A A A A A A Receiver Data Output RXD IRXD = -100 A IRXD = 1 mA VTXD = 5 V VRXD = 0 V VTXD = 0 V VRXD = 5 V VRS = 0 V; -50 A < I5 < 50 A VRS = 5 V; -5A < I5 < 5 A VTXD = VCC; no load -40 V < VCANH; VCANL < 40 V; 0 V < VCC < 5.25 V VTXD = 0 V VTXD = 0 V 4 4 4 4 VRXDH VRXDL IRXDs1 IRXDs2 0.8 VCC 0 -3 2 VCC 0.2 VCC -1 6 V V mA mA A A A A Reference Output Voltage VREF Reference output voltage normal mode Reference output voltage standby mode Recessive bus voltage IO(CANH)(reces) IO(CANL)(reces) CANH output voltage dominant CANL output voltage dominant 5 5 Vref_no Vref_stby 0.45 VCC 0.4 VCC 0.55 VCC 0.6 VCC V V A A DC Bus Transmitter CANH; CANL 6, 7 6, 7 VCANH; VCANL IO_reces 2.0 -5 2.5 3.0 +5 V mA A A 5.2 5.3 5.4 6, 7 6, 7 VCANH VCANL 2.8 0.5 3.5 1.5 4.5 2.0 V V A A *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 5 4582B-BCD-03/03 Electrical Characteristics (Continued) VCC = 4.75 V to 5.25 V; Tamb = -40C to +125C; RBus = 60 ; unless otherwise specified All voltages referenced to ground (Pin 2); positive input current. No. 5.5 5.6 5.7 5.8 6 Short-circuit CANH current Short-circuit CANL current Differential receiver threshold voltage normal mode Differential receiver threshold voltage stand-by mode Differential input hysteresis CANH and CANL common mode input resistance Differential input resistance Matching between CANH and CANL common mode input resistance CANH, CANL input capacitance Differential input capacitance CANH, CANL input leakage input current Thermal Shut-down Shut-down junction temperature for CANH/CANL Switch on junction temperature for CANH/CANL Temperature hysteresis TJ(SD) 150 163 175 C B VCC = 0 V VCANH = 3.5 V VCANL = 1.5 V Parameters Differential bus output voltage (VCANH - VCANL) Test Conditions VTXD = 0 V; RL = 45 W to 60 W; VCC = 4.9 V VTXD = VCC; no load VCANH = -10 V TXD = 0 V VCANL = 18 V TXD = 0 V -10 V < VCANH < +10 V -10 V < VCANL < +10 V VRS = VCC Pin 6, 7 Symbol Vdiffdom Min. 1.5 Typ. 2 Max. 3.0 Unit V Type* A 6, 7 6, 7 6, 7 Vdiffrec ICANH_SC ICANL_SC -500 -35 50 - +50 -100 150 mV mA mA A A A DC Bus Receiver CANH; CANL 6, 7 Vrec_th 0.5 0.7 0.9 V A 6.1 6, 7 Vrec_th_stby 0.5 0.7 0.9 V A 6.2 6.3 6, 7 6, 7 Vdiff(hys) Ri 5 70 15 25 mV kW A A 6.4 6.5 6, 7 6, 7 Rdiff Ri_m 10 -3 30 100 +3 kW % A A 6.6 6.7 6.8 6, 7 6, 7 6, 7 Ci Cdiff ILI(CANH); ILI(CANL) 20 10 250 pF pF A D D A 6.9 7 7.1 TJ(SD) 140 154 165 C B 7.2 7.3 THys 10 K B *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 6 ATA6660 4582B-BCD-03/03 ATA6660 Electrical Characteristics (Continued) VCC = 4.75 V to 5.25 V; Tamb = -40C to +125C; RBus = 60 ; unless otherwise specified All voltages referenced to ground (Pin 2); positive input current. No. 8 8.1 8.2 8.3 8.4 Parameters Delay TXD to bus active Delay TXD to bus inactive Delay TXD to RXD, recessive to dominant Delay TXD to RXD, dominant to recessive Difference between Delay TXD to RXD dominant to Delay recessive Bus dominant to RXD low in stand-by mode Wake up time after stand-by mode (time delay between standby to normal mode and to bus dominant) Input voltage for normal mode Input current for normal mode Input voltage for stand-by mode Test Conditions VRS = 0 V VRS = 0 V VRS = 0 V VRS = 0 V tdiff = td_activ(TXD-RXD) - td_inactiv(TXD-RXD) 6, 7 Pin Symbol td(TXDBUS_ON) Min. Typ. 120 50 200 180 Max. 180 100 420 460 80 Unit ns ns ns ns ns Type* A A A A A Timing Characteristics Normal Mode , VRS 0.3 VCC (see Figure 3) td(TXDBUS_OFF) td_activ(TXDRXD) td_inactiv(TXDRXD) tdiff -280 8.5 9 9.1 Timing Characteristics Stand-by Mode VRS 0.87 VCC VRS = VCC TXD = 0 V VRS from 0 V to VCC 4 6, 7 tdRxDL Twake_up 300 450 2 ns A A s 9.2 10.1 10.1 10.2 10.3 Standby/Normal Mode Selecteable via RS (Pin 8) VRS = VCC VRS = 0 V 8 8 8 VRS IRS Vstby -700 0.87 VCC 0.3 VCC V A V A A A *) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter 7 4582B-BCD-03/03 Figure 3. Timing Diagrams HIGH TXD LOW dominant CANH CANH CANL dominant CANL dominant (bus activ) 0.9V Vdiff 0.5V recessive (bus inactive) HIGH 0.7VCC RXD 0.3VCC LOW td (TXD_bus_on) td (TXD_bus_off) t d_activ(TXD_RXD) t d_inactiv (TXD_RXD) 8 ATA6660 4582B-BCD-03/03 ATA6660 Figure 4. Test Circuit for Timing Characteristics TXD GND + 5V VCC RXD 1 8 RS CANH CANL Vref RL=62 CL=100pF 2 7 ATA6660 3 6 4 5 C=47F C=100nF C=15pF Figure 5. Bus Application with Split Termination Concept CSPLIT =10nF bus line end node CAN Controller TXD GND RS CANH CANL Vref RL=60 RL=60 bus line stub node 8 1 2 7 + 5V VCC RXD ATA6660 3 6 C=15pF C=47F C=100nF 4 5 RL=1,3k RL=1,3k TXD CAN Controller RS CANH CANL Vref RL=60 CSPLIT =10nF RL=60 bus line end node 8 1 GND VCC CSPLIT =10nF 2 7 + 5V ATA6660 3 6 RXD C=47F C=100nF C=15pF 4 5 9 4582B-BCD-03/03 Ordering Information Extended Type Number ATA6660 Package SO8 Remarks - Package Information Package SO8 Dimensions in mm 5.00 4.85 1.4 0.4 1.27 3.81 8 5 0.25 0.10 0.2 3.8 6.15 5.85 5.2 4.8 3.7 technical drawings according to DIN specifications 1 4 10 ATA6660 4582B-BCD-03/03 Atmel Headquarters Corporate Headquarters 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 487-2600 Atmel Operations Memory 2325 Orchard Parkway San Jose, CA 95131 TEL 1(408) 441-0311 FAX 1(408) 436-4314 RF/Automotive Theresienstrasse 2 Postfach 3535 74025 Heilbronn, Germany TEL (49) 71-31-67-0 FAX (49) 71-31-67-2340 1150 East Cheyenne Mtn. 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No licenses to patents or other intellectual property of Atmel are granted by the Company in connection with the sale of Atmel products, expressly or by implication. Atmel's products are not authorized for use as critical components in life support devices or systems. Atmel (R) is the registered trademark of Atmel. Other terms and product names may be the trademarks of others. Printed on recycled paper. 4582B-BCD-03/03 xM |
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