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L9615
CAN BUS TRANSCEIVER
L9615 MEETS ISO/DIS 11898 UP TO 500KBAUD TRANSMITTER - GENERATION OF DIFFERENTIAL OUTPUT SIGNALS - SHORT CIRCUIT PROTECTED FROM -5V TO 36V, DETECTION & SHUTDOWN - SLOPE CONTROL TO REDUCE RFI AND EMI - TWO STATES ADJUSTABLE SLOPE CONTROL (500KBAUD/125KBAUD) RECEIVER - DIFFERENZIAL INPUT WITH HIGH INTERFERENCE SUPPRESSION - COMMON MODE INPUT VOLTAGE RANGE (VCOM) FROM -2V TO VS+3V PACKAGE: SO 8 DESCRIPTION The L9615 is a bidirectional transceiver for signal BLOCK DIAGRAM
3
SO8 ORDERING NUMBER: L9615D
conditioning and processing in connection with a CAN controller. Data rates of up to 500KBAUD are supported using either shielded or nonshielded pair of lines.
VS
1
&
td
TX0
1 1 & 1
ASC RX0
8 4 + VS + VCLmax M M 7 C_H C_L
1
6 1
RX1
5 M VREF
2
GND
RECEIVER
PROTECTION
TRANSMITTER
D96AT245
February 1998
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L9615
ABSOLUTE MAXIMUM RATINGS
Symbol VS VC_H, VC_L IC_H, IC_L VDC IRXO Tstg, TJ Top Supply Voltage Bus Voltage at C_H, C_L (VS 0 to 5.5V) Off State Leakage Current at C_H, C_L ( VS =0 to 5.5V, VC_H = -5 to 36V, VC_L = -5 to 36 ) DC Voltage at TXO, ASC (VS 0 to 5.5V) Output Current at RXO (VS 0 to 5.5V) Storage and Junction Temperature Range Operating Temperature Range Parameter Value -0.3 to 7 -5 to 36 -3 to 5 GND -0.3 to VS +0.3 -0.3 to 1 -40 to 150 -40 to 110 Unit V V mA V mA C C
All voltages, except bus voltage, are defined with respect to pin 2 Positive currents flow into the IC.
PIN CONNECTION
TX0 GND VS RX0
1 2 3 4
D96AT246
8 7 6 5
ASC C_H C_L RX1
THERMAL DATA
Symbol Parameter Value Unit
PIN FUNCTIONS
N. 1 2 3 4 5 6 7 8 Name TXO GND VS RXO RX1 C_L C_H ASC Transmitter Input Ground Supply Voltage Receive Output Reference Voltage Low Side Bus Output High Side Bus Output Adjustable Slope Control Function
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L9615
ELECTRICAL CHARACTERISTICS (TOP = -40 to 110C; VS = 4.5 to 5.5V; Dominat: VTXO = GND; Recessive: VTXO = VS; All voltages, except bus voltage, are defined with respect to pin 2. Positive currents flow into the IC unless otherwise specified.)
Symbol VS IS Parameter Supply Voltage Supply Current Dominant Recessive Test Condition Min. 4.5 Typ. 5 Max. 5.5 80 20 Unit V mA mA
TRANSMITTER SECTION (RA = 60 between C_H and C_L)
CTXO VTXO ITXO CASC VASC TXO Input Capacitance TXO High Level Input Voltage TXO Low Level Input Voltage TXO High Level Input Current TXO Low Level Input Current ASC Input Capacitance ASC Input Voltage for High Speed ASC Input Voltage for Low Speed IASC VC_H, VC_L IC_H, IC_L RIN(C_H, C_L) RDiff(C_H, C_L) VDiff = VC_H - V C_L) VDiff = VC_H - V C_L) td IA ASC Input Current Bus Voltage Recessive Leakage Current Recessive Input Resistence Differential Input Resistence Differential Output Voltage Differential Output Voltage Short Circuit Detection Time C_H to C_L ; C_H to B Supply Current in Case of Short Circuit, C_H to C_L, C_H to B (time = td) Overvoltage Protection Threshold on C_L 7 VASC = VS VASC = 0V Recessive VC_L = VC_H = -2 to 7V VC_L = VC_H = 1 to 4V Recessive Recessive Dominant, RA Recessive RCS < 1 VTXO = VS VTXO = GND 0V < VASC < VS 0 0.9 VS 25 -2 0.4 VS -0.7 -0.3 5 10 1.5 -500 1 0 5 150 0 0.5 Vs 0V < VTXO < VS 0.7 VS 0 -2 -275 0 0 25 0.1 VS VS 275 2 0.6 Vs 0.7 0.3 50 100 3 50 10 A A mA mA K K V mV s mA 25 VS 0.3 VS 2 -25 A A pF pF
VC_Lmax
8
10
V
RECEIVE SECTION
VRXO RXO High Level Output Voltage RXO Low Level Output Voltage VS = VC_H -VC_L VCOM = (VC_H +VC_L)/2 VHYS Input Signal Threshold Input Common Mode Voltage Range Differential Input Hysteresis VDiff < 0.5V; IRXO = 0.3mA; VC_H = -2 to 7V; VC_L = -2 to 7V; VDiff > 0.9V; IRXO = 1mA; VC_H = -2 to 7V; VC_L = -2 to 7V; VC_H = -2 to 7V; VC_L = -2 to 7V; 500 -2 150 700 0.9 VS Vs 0.5 900 7 V V mV V mV
REFERENCE OUTPUT
VRX1 RRX1 Reference Voltage Output Resistance IRX1 = 0 0.45 VS 0.5 VS 0.55 VS 2 9 V K
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L9615
DINAMIC CHARACTERISTICS (CA = 47pF between C_H and C_L; VS = 5V; tR < 5ns; CRXO = 20pF between RXO and B; RA = 60 between C_H and C_L)
Symbol tOT SR tOR tOTR Parameter Signal Delay TXO to C_H, C_L Differential Output Slew Rate (Transmitter) Signal Delay C_H, C_L to RXO Signal Delay TXO to RXO VASC = 0V VASC = VS VASC = 0V VASC = 0V 20 5 Test Condition Min. Typ. Max. 50 50 20 150 300 Unit ns V/s V/s ns ns
FUNCTIONAL DESCRIPTION The L9615 is used as an interface between a CAN controller and the physical bus. The device provides transmitting capability to the CAN controller. The transmitter outputs C_H and C_L are protected against short circuits and electrical transients which may occur in an automotive environment. In case of short circuit (C_H to C_L, C_H to B) the protection circuit recognizes this fault conditionand the transmitter output stages are disabled with a delay of max. 10s to prevent destruction of the IC and high consumption of supply current IS. If VC_L >VC_Lmax the transmitter output stages would be disabled immediately. Pin ASC makes it possible to select two different TYPICAL APPLICATION
modes of operation: High speed (500kBaud) and low speed (125kBaud). The ASC pin is tied to GND for normal operation at 500kBaud. For slower speed operation at 125kBaud the rise and fall slope of the bus output can be decreased to reduce EMI by connectingg the ASC pin to VS. FUNCTIONAL TABLE
TXO L H or Floating C_H H Floating VS/2 C_L L Floating VS/2 Bus State Dominant Recessive RXO L H
VCOM VSn SYSTEM n
RA VSm SYSTEM m
CAN BUS CONTROLLER L9615 L9615 CONTROLLER
VGNDn VGNDD RA VGNDm C_L C_H VDiff
D96AT247A
VGNDm
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L9615
TIMING DIAGRAM
tR tR
VTX0
tOT tOT
0.9V
VDiff
0.5V
VRX0
tOR
D96AT248
tOR tOTR
tOTR
EMC PERFORMANCE (RECEIVER)
EQUIVALENT TERMINATING RESISTOR 2 x 120 PARALLEL AT LINE ENDS 6.8F 30 CAN CONTROLLER 1 MONITORING (BIT COMPARISON) CAN TRANSCELVER 1 50
250Kbit/sec
450 30
Ust (Noise signal) 100
40dB HP8640
CAN CONTROLLER 2
250Kbit/sec
CAN TRANSCELVER 2
6.8F
90%AM, 1KHz
UST (V) 30VSS NOT NOISE RESISTANT L9615
NOISE RESISTANT 20VSS min. request boundary (automotive industry)
10VSS
1MHz
10MHz
100MHz
500MHz
1GHz
D96AT249B
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L9615
EMC PERFORMANCE (TRANSMITTER)
4.7nF TX0 equivalent terminating resistor 2 x 120 parallel at line ends C_H 30 4.7nF 50
50 +5V
80dBF
VS GND
C_L
30
V
TEK495 Analyzer
D96AT250
Transceiver Without Emc Reducing Measures
80 70 60 50 40 30 20 10 0 0 40 80 120 160 ATTENUATION OF TRANSMITTER
D96AT251
Transceiver With Emc Reducing Measures
80 70 60 50 40 30 20 10 0 0 40 80 120 160 ATTENUATION OF TRANSMITTER
D96AT252
10000 3162 1000 316.2 100 31.62 10 3.162
10000 3162 1000 316.2 100 31.62 10 3.162
1 f(KHz)
1 f(KHz)
EMC PERFORMANCE (Transceiver Sending)
TX0 50 +5V 5V 250KHz GND equivalent terminating resistor 2 x 120 parallel at line ends C_H 30 4.7nF 50
VS
C_L
30
V
TEK495 Analyzer
D96AT253
Transceiver Without Emc Reducing Measures
80 70 60 50 40 30 20 10 0 0 40 80 120 160
D96AT254
Transceiver With Emc Reducing Measures
80 70 60 50 40 30 20 10 0 0 40 80 120 160
D96AT255
10000 3162 1000 316.2 100 31.62 10 3.162
10000 3162 1000 316.2 100 31.62 10 3.162
1 f(KHz)
1 f(KHz)
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L9615
SO8 PACKAGE MECHANICAL DATA
DIM. MIN. A a1 a2 a3 b b1 C c1 D E e e3 F L M S 3.8 0.4 4.8 5.8 1.27 3.81 4.0 1.27 0.6 8 (max.) 0.15 0.016 5.0 6.2 0.65 0.35 0.19 0.25 0.1 mm TYP. MAX. 1.75 0.25 1.65 0.85 0.48 0.25 0.5 45 (typ.) 0.189 0.228 0.050 0.150 0.157 0.050 0.024 0.197 0.244 0.026 0.014 0.007 0.010 0.004 MIN. inch TYP. MAX. 0.069 0.010 0.065 0.033 0.019 0.010 0.020
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L9615
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGSTHOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1998 SGS-THOMSON Microelectronics - Printed in Italy - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - taly - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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