STMICROELECTRONICS L9615D

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
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.
DESCRIPTION
The L9615 is a bidirectional transceiver for signal
BLOCK DIAGRAM
3
1
TX0
&
VS
td
1
≥1
1
&
ASC
RX0
RX1
8
4
7
+
VS
-
1
6
1
5
M
VREF
C_L
+
VCLmax
M
M
2
RECEIVER
C_H
PROTECTION
GND
TRANSMITTER
D96AT245
February 1998
1/8
L9615
ABSOLUTE MAXIMUM RATINGS
Symbol
Value
Unit
Supply Voltage
Parameter
-0.3 to 7
V
VC_H, VC_L
IC_H, IC_L
Bus Voltage at C_H, C_L (VS 0 to 5.5V)
-5 to 36
V
Off State Leakage Current at C_H, C_L ( VS =0 to 5.5V,
VC_H = -5 to 36V, VC_L = -5 to 36 )
-3 to 5
mA
VDC
DC Voltage at TXO, ASC (VS 0 to 5.5V)
VS
IRXO
Tstg, TJ
Top
GND -0.3 to VS +0.3
V
Output Current at RXO (VS 0 to 5.5V)
Storage and Junction Temperature Range
-0.3 to 1
-40 to 150
mA
°C
Operating Temperature Range
-40 to 110
°C
Value
Unit
All voltages, except bus voltage, are defined with respect to pin 2
Positive currents flow into the IC.
PIN CONNECTION
TX0
1
8
ASC
GND
2
7
C_H
VS
3
6
C_L
RX0
4
5
RX1
D96AT246
THERMAL DATA
Symbol
Parameter
PIN FUNCTIONS
N.
2/8
Name
Function
1
TXO
Transmitter Input
2
3
GND
VS
Ground
Supply Voltage
4
5
RXO
RX1
Receive Output
Reference Voltage
6
C_L
Low Side Bus Output
7
8
C_H
ASC
High Side Bus Output
Adjustable Slope Control
L9615
ELECTRICAL CHARACTERISTICS (TOP = -40 to 110°C; 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
Parameter
VS
Supply Voltage
IS
Supply Current
Test Condition
Min.
Typ.
Max.
4.5
5
Unit
5.5
V
Dominant
80
mA
Recessive
20
mA
TRANSMITTER SECTION (RA = 60Ω between C_H and C_L)
CTXO
VTXO
TXO Input Capacitance
TXO High Level Input Voltage
0V < VTXO < VS
TXO Low Level Input Voltage
ITXO
CASC
VASC
VTXO = VS
TXO Low Level Input Current
VTXO = GND
ASC Input Capacitance
0V < VASC < VS
ASC Input Voltage for High
Speed
VC_H, VC_L
IC_H, IC_L
ASC Input Current
Bus Voltage Recessive
Leakage Current Recessive
pF
VS
0
TXO High Level Input Current
ASC Input Voltage for Low Speed
IASC
25
0.7 VS
0.3 VS
-2
0
2
µA
-275
0
-25
µA
25
pF
0
0.1 VS
0.9 VS
VS
275
µA
-2
0
2
µA
Recessive
VC_L = VC_H = -2 to 7V
0.4 VS
-0.7
0.5 Vs
0.6 Vs
0.7
mA
VC_L = VC_H = 1 to 4V
VASC = VS
VASC = 0V
25
-0.3
0.3
mA
RIN(C_H, C_L)
RDiff(C_H, C_L)
Input Resistence
Recessive
5
50
KΩ
Differential Input Resistence
Recessive
10
100
KΩ
VDiff =
VC_H - V C_L)
VDiff =
VC_H - V C_L)
Differential Output Voltage
Dominant, RA
1.5
3
V
Differential Output Voltage
Recessive
-500
0
50
mV
td
Short Circuit Detection Time
C_H to C_L ; C_H to B
RCS < 1Ω
1
5
10
µs
IA
Supply Current in Case of Short
Circuit, C_H to C_L, C_H to B
(time = td)
VC_Lmax
150
Overvoltage Protection
Threshold on C_L
7
8
mA
10
V
Vs
V
0.5
V
900
mV
7
V
RECEIVE SECTION
VRXO
VS =
VC_H -VC_L
VCOM = (VC_H
+VC_L)/2
VHYS
RXO High Level Output Voltage
VDiff < 0.5V; IRXO = 0.3mA;
VC_H = -2 to 7V; VC_L = -2 to 7V;
RXO Low Level Output Voltage
VDiff > 0.9V; IRXO = 1mA;
VC_H = -2 to 7V; VC_L = -2 to 7V;
Input Signal Threshold
VC_H = -2 to 7V; VC_L = -2 to 7V;
Input Common Mode Voltage
Range
0.9 VS
500
700
-2
Differential Input Hysteresis
150
mV
0.45 VS 0.5 VS 0.55 VS
2
9
V
KΩ
REFERENCE OUTPUT
VRX1
RRX1
Reference Voltage
Output Resistance
IRX1 = 0
3/8
L9615
DINAMIC CHARACTERISTICS (CA = 47pF between C_H and C_L; VS = 5V; tR < 5ns;
CRXO = 20pF between RXO and B; RA = 60Ω between C_H and C_L)
Symbol
Parameter
tOT
Signal Delay TXO to C_H, C_L
SR
Differential Output Slew Rate
(Transmitter)
VASC = 0V
VASC = VS
Signal Delay C_H, C_L to RXO
Signal Delay TXO to RXO
tOR
tOTR
Test Condition
Min.
Typ.
Max.
ns
50
20
V/µs
V/µs
VASC = 0V
150
ns
VASC = 0V
300
ns
20
5
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 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. 10µs 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
FUNCTIONAL TABLE
TXO
C_H
C_L
Bus State
RXO
L
H
L
Dominant
L
H or
Floating
Floating
VS/2
Floating
VS/2
Recessive
H
TYPICAL APPLICATION
VCOM
RA
VSn
VSm
SYSTEM n
SYSTEM m
CAN BUS
CONTROLLER
L9615
L9615
CONTROLLER
VGNDn
VGNDm
C_H
VGNDD
RA
VDiff
VGNDm
D96AT247A
C_L
4/8
Unit
50
L9615
TIMING DIAGRAM
tR
tR
VTX0
tOT
tOT
0.9V
VDiff
0.5V
VRX0
tOR
tOR
D96AT248
tOTR
tOTR
EMC PERFORMANCE (RECEIVER)
EQUIVALENT TERMINATING
RESISTOR 2 x 120Ω
PARALLEL AT LINE ENDS
6.8∝F
30Ω
CAN
CONTROLLER
1
250Kbit/sec
CAN
TRANSCELVER
1
50Ω
450Ω
30Ω
Ust (Noise signal)
MONITORING
(BIT COMPARISON)
100Ω
40dB
HP8640
CAN
CONTROLLER
2
250Kbit/sec
CAN
TRANSCELVER
2
6.8∝F
90%AM, 1KHz
UST
(V)
NOT NOISE RESISTANT
30VSS
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
50Ω
VS
+5V
80dBµF
equivalent terminating resistor
2 x 120Ω parallel at line ends
TX0
GND
C_H
30Ω
C_L
30Ω
4.7nF
50Ω
µV
TEK495
Analyzer
D96AT250
Transceiver Without Emc Reducing Measures
D96AT251
80
Transceiver With Emc Reducing Measures
D96AT252
10000
80
3162
70
1000
60
50
316.2
50
316.2
40
100
40
100
30
31.62
30
31.62
20
10
20
10
10
3.162
10
3.162
70
ATTENUATION OF
TRANSMITTER
60
0
0
40
80
120
160
1
f(KHz)
3162
ATTENUATION OF
TRANSMITTER
1000
0
0
40
80
120
10000
160
1
f(KHz)
EMC PERFORMANCE (Transceiver Sending)
equivalent terminating resistor
2 x 120Ω parallel at line ends
TX0
50Ω
+5V
VS
5V
250KHz
GND
C_H
30Ω
C_L
30Ω
4.7nF
50Ω
µV
TEK495
Analyzer
D96AT253
Transceiver Without Emc Reducing Measures
D96AT254
80
D96AT255
10000
80
70
3162
70
3162
60
1000
60
1000
50
316.2
50
316.2
40
100
40
100
30
31.62
30
31.62
20
10
20
10
10
3.162
10
3.162
0
0
6/8
Transceiver With Emc Reducing Measures
40
80
120
160
1
f(KHz)
0
0
40
80
120
160
10000
1
f(KHz)
L9615
SO8 PACKAGE MECHANICAL DATA
mm
DIM.
MIN.
TYP.
A
a1
inch
MAX.
MIN.
TYP.
1.75
0.1
0.069
0.25
a2
MAX.
0.004
0.010
1.65
0.065
a3
0.65
0.85
0.026
0.033
b
0.35
0.48
0.014
0.019
b1
0.19
0.25
0.007
0.010
C
0.25
0.5
0.010
0.020
c1
45° (typ.)
D
4.8
5.0
0.189
0.197
E
5.8
6.2
0.228
0.244
e
1.27
0.050
e3
3.81
0.150
F
3.8
4.0
0.15
0.157
L
0.4
1.27
0.016
0.050
M
S
0.6
0.024
8° (max.)
7/8
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.
© 1998 SGS-THOMSON Microelectronics – Printed in Italy – All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
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