AMIS30600AGA American Microsystems, Inc., AMIS30600AGA Datasheet - Page 4

• Manufacturer Part Number: AMIS30600AGA
• Description: High Speed CAN Transceiver
• Manufacturer: American Microsystems, Inc.

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A A M M I I S S - - 3 3 0 0 6 6 6 6 3 3 High Speed CAN Transceiver
A A M M I I S S e e m m i i c c o o n n d d u u c c t t o o r r - - R R e e v v . . 1 1 . . 4 4 , , O O c c t t . . 0 0 4 4
Table 3: Function Table (X = don’t care)
4.75 < V
V
7 7 . . 3 3 O O v v e e r r - - t t e e m m p p e e r r a a t t u u r r e e D D e e t t e e c c t t i i o o n n
A thermal protection circuit protects the IC from damage by switching off the transmitter if the junction temperature exceeds a value of approximately
160°C. Because the transmitter dissipates most of the power, the power dissipation and temperature of the IC is reduced. All other IC functions continue
to operate. The transmitter off-state resets when pin TxD goes HIGH. The thermal protection circuit is particularly needed when a bus line short circuits.
7 7 . . 4 4 T T x x D D D D o o m m i i n n a a n n t t T T i i m m e e - - o o u u t t F F u u n n c c t t i i o o n n
A TxD dominant time-out timer circuit prevents the bus lines from being driven to a permanent dominant state (blocking all network communication) if
pin TxD is forced permanently LOW by a hardware and/or software application failure. The timer is triggered by a negative edge on pin TxD. If the duration
of the LOW-level on pin TxD exceeds the internal timer value t
positive edge on pin TxD.
7 7 . . 5 5 F F a a i i l l - - s s a a f f e e F F e e a a t t u u r r e e s s
A current-limiting circuit protects the transmitter output stage from damage caused by accidental short circuit to either positive or negative supply voltage -
although power dissipation increases during this fault condition.
The pins CANH and CANL are protected from automotive electrical transients (according to "ISO 7637"; see Figure 4). Should TxD become disconnected,
this pin is pulled high internally. When the V
by the CAN controller through the I/O pins.
7 7 . . 6 6 3 3 . . 3 3 V V I I n n t t e e r r f f a a c c e e
AMIS-30663 may be used to interface with 3.3V or 5V controllers by use of the V
digital interface voltage levels.
When the V
In this case a pull resistor from TxD to V
PORL < V
High Speed
M M o o d d e e
M M o o d d e e
CC
M M o o d d e e
< PORL
-
-
CC
CC
< 5.25V
> V
T T x x D D
T T x x D D
< 4.75V
33
X
IH
pin is supplied at 2.5V, even interfacing with 2.5V CAN controllers is possible. See also Digital Output Characteristics @ V
T T x x D D
P P i i n n
P P i i n n
0
1
R R x x D D
R R x x D D
P P i i n n
1
1
R R x x D D
0
1
Recessive
Recessive
S S T T A A T T E E
S S T T A A T T E E
Dominant
Recessive
S S T T A A T T E E
33
0 < V
0 < V
is necessary.
CC
C C A A N N H H
C C A A N N H H
CANH
CANH
supply is removed, pins TxD and RxD will be floating. This prevents the AMIS-30663 from being supplied
B B u u s s
B B u u s s
< V
< V
0.5 V
C C A A N N H H
High
B B u u s s
CC
CC
CC
0 < V
0 < V
C C A A N N L L
C C A A N N L L
dom
0.5 V
C C A A N N L L
CANL
CANL
Low
, the transmitter is disabled, driving the bus into a recessive state. The timer is reset by a
< V
< V
CC
CC
CC
4
33
pin. This pin may be supplied with 3.3V or 5V to have the corresponding
33
= 2.5V, Table 7.
Data Sheet