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
(V
COM
) FROM -2V TO V
S
+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 non-
shielded pair of lines.
V
S
1
&
td
TX0
1
≥1
&
1
ASC
RX0
8
4
+
7
C_H
C_L
1
V
S
-
6
1
+
-
V
CLmax
M
M
RX1
5
M
V
REF
2
GND
RECEIVER
PROTECTION
TRANSMITTER
D96AT245
February 1998
1/8
L9615
ABSOLUTE MAXIMUM RATINGS
Symbol
V
S
V
C_H
, V
C_L
I
C_H
, I
C_L
V
DC
I
RXO
T
stg
, T
J
T
op
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,
V
C_H
= -5 to 36V, V
C_L
= -5 to 36 )
DC Voltage at TXO, ASC (VS 0 to 5.5V)
Output Current at RXO (V
S
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 V
S
+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
V
S
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
V
S
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
2/8
L9615
ELECTRICAL CHARACTERISTICS
(T
OP
= -40 to 110°C; V
S
= 4.5 to 5.5V; Dominat: VTXO = GND; Re-
cessive: VTXO = V
S
; All voltages, except bus voltage, are defined with respect to pin 2. Positive currents
flow into the IC unless otherwise specified.)
Symbol
V
S
I
S
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
(R
A
= 60Ω between C_H and C_L)
C
TXO
V
TXO
I
TXO
C
ASC
V
ASC
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
I
ASC
V
C_H
, V
C_L
I
C_H
, I
C_L
R
IN(C_H
,
C_L)
R
Diff(C_H
,
C_L)
V
Diff
=
V
C_H
- V
C_L)
V
Diff
=
V
C_H
- V
C_L)
t
d
I
A
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 = t
d
)
Overvoltage Protection
Threshold on C_L
7
V
ASC
= V
S
V
ASC
= 0V
Recessive
VC_L = V
C_H
= -2 to 7V
V
C_L
= V
C_H
= 1 to 4V
Recessive
Recessive
Dominant, R
A
Recessive
R
CS
< 1Ω
V
TXO
= V
S
V
TXO
= GND
0V < V
ASC
< V
S
0
0.9 V
S
25
-2
0.4 V
S
-0.7
-0.3
5
10
1.5
-500
1
0
5
150
0
0.5 Vs
0V < V
TXO
< V
S
0.7 V
S
0
-2
-275
0
0
25
0.1 V
S
VS
275
2
0.6 Vs
0.7
0.3
50
100
3
50
10
µA
µA
mA
mA
KΩ
KΩ
V
mV
µs
mA
25
V
S
0.3 V
S
2
-25
µA
µA
pF
pF
V
C_Lmax
8
10
V
RECEIVE SECTION
V
RXO
RXO High Level Output Voltage
RXO Low Level Output Voltage
V
S
=
V
C_H
-V
C_L
V
COM
= (V
C_H
+V
C_L
)/2
V
HYS
Input Signal Threshold
Input Common Mode Voltage
Range
Differential Input Hysteresis
V
Diff
< 0.5V; I
RXO
= 0.3mA;
V
C_H
= -2 to 7V; V
C_L
= -2 to 7V;
V
Diff
> 0.9V; I
RXO
= 1mA;
V
C_H
= -2 to 7V; V
C_L
= -2 to 7V;
V
C_H
= -2 to 7V; V
C_L
= -2 to 7V;
500
-2
150
700
0.9 V
S
Vs
0.5
900
7
V
V
mV
V
mV
REFERENCE OUTPUT
V
RX1
R
RX1
Reference Voltage
Output Resistance
I
RX1
= 0
0.45 V
S
0.5 V
S
0.55 V
S
2
9
V
KΩ
3/8
L9615
DINAMIC CHARACTERISTICS
(C
A
= 47pF between C_H and C_L; V
S
= 5V; t
R
< 5ns;
C
RXO
= 20pF between RXO and B; R
A
= 60Ω between C_H and C_L)
Symbol
t
OT
S
R
t
OR
t
OTR
Parameter
Signal Delay TXO to C_H, C_L
Differential Output Slew Rate
(Transmitter)
Signal Delay C_H, C_L to R
XO
Signal Delay T
XO
to R
XO
V
ASC
= 0V
V
ASC
= V
S
V
ASC
= 0V
V
ASC
= 0V
20
5
Test Condition
Min.
Typ.
Max.
50
50
20
150
300
Unit
ns
V/µs
V/µs
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 con-
troller.
The transmitter outputs C_H and C_L are pro-
tected against short circuits and electrical tran-
sients which may occur in an automotive environ-
ment. In case of short circuit (C_H to C_L, C_H to
B) the protection circuit recognizes this fault con-
ditionand the transmitter output stages are dis-
abled with a delay of max. 10µs to prevent de-
struction of the IC and high consumption of
supply current I
S
. If V
C_L
>V
C_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 out-
put can be decreased to reduce EMI by connect-
ingg the ASC pin to V
S
.
FUNCTIONAL TABLE
TXO
L
H or
Floating
C_H
H
Floating
V
S
/2
C_L
L
Floating
V
S
/2
Bus State
Dominant
Recessive
RXO
L
H
V
COM
V
Sn
SYSTEM n
R
A
V
Sm
SYSTEM m
CAN BUS
CONTROLLER
L9615
L9615
CONTROLLER
V
GNDn
V
GNDD
R
A
V
GNDm
C_L
C_H
V
Diff
D96AT247A
V
GNDm
4/8
L9615
TIMING DIAGRAM
t
R
t
R
V
TX0
t
OT
t
OT
0.9V
V
Diff
0.5V
V
RX0
t
OR
D96AT248
t
OR
t
OTR
t
OTR
EMC PERFORMANCE (RECEIVER)
EQUIVALENT TERMINATING
RESISTOR 2 x 120Ω
PARALLEL AT LINE ENDS
6.8∝F
30Ω
CAN
CONTROLLER
1
MONITORING
(BIT COMPARISON)
CAN
TRANSCELVER
1
50Ω
250Kbit/sec
450Ω
30Ω
Ust (Noise signal)
100Ω
40dB
HP8640
CAN
CONTROLLER
2
250Kbit/sec
CAN
TRANSCELVER
2
6.8∝F
90%AM, 1KHz
U
ST
(V)
30V
SS
NOT NOISE RESISTANT
L9615
NOISE RESISTANT
20V
SS
min. request boundary
(automotive industry)
10V
SS
1MHz
10MHz
100MHz
500MHz
1GHz
D96AT249B
5/8
京公网安备 11010802033920号
EEWORLD
