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PDF AMIS-42671 Data sheet ( Hoja de datos )
| Número de pieza | AMIS-42671 | |
| Descripción | High Speed Autobaud CAN Transceiver | |
| Fabricantes | ON Semiconductor | |
| Logotipo |  |
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AMIS-42671
High Speed Autobaud CAN
Transceiver
General Description
The AMIS−42671 CAN transceiver with autobaud is the interface
between a controller area network (CAN) protocol controller and the
physical bus. It may be used in both 12 V and 24 V systems. The
transceiver provides differential transmit capability to the bus and
differential receive capability to the CAN controller. Due to the wide
common−mode voltage range of the receiver inputs, the AMIS−42671
is able to reach outstanding levels of electromagnetic susceptibility
(EMS). Similarly, extremely low electromagnetic emission (EME) is
achieved by the excellent matching of the output signals.
The AMIS−42671 is primarily intended for industrial network
applications where long network lengths are mandatory. Examples are
elevators, in−building networks, process control and trains. To cope
with the long bus delay the communication speed needs to be low.
AMIS−42671 allows low transmit data rates down 10 kbit/s or lower.
The autobaud function allows the CAN controller to determine the
incoming baud rate without influencing the CAN communication on
the bus.
Features
• Fully compatible with the ISO 11898−2 standard
• Autobaud function
• Wide range of bus communication speed (0 up to 1 Mbit/s)
• Allows low transmit data rate in networks exceeding 1 km
• Ideally suited for 12 V and 24 V industrial and automotive
applications
• Low electromagnetic emission (EME), common−mode choke is no
longer required
• Differential receiver with wide common−mode range ($35 V) for
high EMS
• No disturbance of the bus lines with an un−powered node
• Thermal protection
• Bus pins protected against transients
• Silent mode in which the transmitter is disabled
• Short circuit proof to supply voltage and ground
• Logic level inputs compatible with 3.3 V devices
• ESD protection for CAN bus at $8 kV
• These are Pb−Free Devices*
http://onsemi.com
PIN ASSIGNMENT
TxD 1
GND 2
VCC 3
RxD 4
8 AUTB
7 CANH
6 CANL
5 VREF
PC20070929.1
(Top View)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 12 of this data sheet.
*For additional information on our Pb−Free strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2009
January, 2009 − Rev. 3
1
Publication Order Number:
AMIS−42671/D
1 page  
VBAT
AMIS−42671
APPLICATION INFORMATION
IN 5V−reg OUT
PC20071001.1
VCC
CAN
controller
GND
VCC
AUTB
3
8 7 CANH
RxD
4
AMIS−
42671
5
VREF
TxD
1
6 CANL
2
GND
60 W 60 W
47 nF
CAN
BUS
60 W 60 W
47 nF
Figure 2. Application Diagram
http://onsemi.com
5
5 Page 
TxD
CANH
CANL
VViC(dAifN) H=− VCANL
RxD
td(TxD−BUSon)
tpd(rec−dom)
AMIS−42671
HIGH
LOW
0.9V
0.5V
dominant
recessive
0.3 x VCC
td(TxD−BUSoff)
td(BUSon−RxD)
tpd(dom−rec)
0.7 x VCC
td(BUSoff−RxD)
PC20040829.6
Figure 7. Timing Diagram for AC Characteristics
+5 V
100 nF
VCC
TxD
Generator
RxD
20 pF
3
7 CANH
1
AMIS−
42671
6
CANL
4
8
AUTB
5
2
30 W
VREF
GND
6.2 kW
10 nF
Active Probe
6.2 kW
30 W
Spectrum Anayzer
47 nF
Figure 8. Basic Test Setup for Electromagnetic Measurement
PC20071002.2
CANH
CANL
VCM =
0.5*(VCANH+VCANL)
VCM−step
recessive
VCM−peak
VCM−peak
PC20040829.7
Figure 9. Common−Mode Voltage Peaks (see Measurement Setup Figure 8)
http://onsemi.com
11
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet AMIS-42671.PDF ] | |
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