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
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
Test Condition
VASC = 0V
VASC = VS
VASC = 0V
VASC = 0V
Min.
20
5
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 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 out-
put can be decreased to reduce EMI by connect-
ingg 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
CONTROLLER
L9615
VGNDn
VGNDD
VGNDm
RA
VSm
SYSTEM m
CAN BUS
L9615
CONTROLLER
C_H
RA
VDiff
C_L
VGNDm
D96AT247A
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