AMIS-42700 Datasheet, PDF (1/16 Pages) AMI SEMICONDUCTOR – Dual High-Speed CAN Transceiver

AMIS-42700 Dual High-Speed CAN Transceiver
Preliminary Data Sheet
1.0 Key Features
Controller area network (CAN) is a serial communication protocol, which supports distributed real-time control and multiplexing with
high safety level. Typical applications of CAN-based networks can be found in automotive and industrial environments.
The AMIS-42700 Dual-CAN transceiver is the interface between up to two physical bus lines and the protocol controller and will be
used for serial data interchange between different electronic units at more than one bus line. It can be used for both 12V and 24V
systems.
The circuit consists of following blocks:
• Two differential line transmitters
• Two differential line receivers
• Interface to the CAN protocol handler
• Interface to expand the number of CAN busses
• Logic block including repeater function and the feedback suppression
• Thermal shutdown circuit (TSD)
• Short to battery treatment circuit
Due to the wide common-mode voltage range of the receiver inputs, the AMIS-42700 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.
2.0 Key Features
• Fully compatible with the ISO 11898-2 standard
• Certified “Authentication on CAN Transceiver Conformance (d1.1)”
• High speed (up to 1 Mbit/s)
• Ideally suited for 12V and 24V industrial and automotive applications
• Low EME common-mode-choke is no longer required
• Differential receiver with wide common-mode range (+/- 35V) for high EMS
• No disturbance of the bus lines with an un-powered node
• Transmit data (TxD) dominant time-out function
• Thermal protection
• Bus pins protected against transients in an automotive environment
• Power down mode in which the transmitter is disabled
• Short circuit proof to supply voltage and ground
• Logic level inputs compatible with 3.3V devices
• ESD protection guaranteed up to ±8KV
3.0 Technical Characteristics
Table 1: Technical Characteristics
Symbol
Parameter
V_CANH
DC voltage at pin CANH
V_CANL
DC voltage at pin CANL
V_{i(dif)(bus_dom)} Differential bus output voltage in dominant state
t_pd(rec-dom)
Propagation delay TxD to RxD
t _pd(dom-rec)
Propagation delay TxD to RxD
CM-range
Input common-mode range for comparator
V_CM-peak
Common-mode peak
V_CM-step
Common-mode step
Notes: The parameters V_CM-peak and V_CM-step guarantee low EME.
Conditions
0 < V_CC < 5.25V; no time limit
0 < V_CC < 5.25V; no time limit
42.5Ω < R_LT < 60Ω
See Figure 7
See Figure 7
Guaranteed differential receiver threshold and
leakage current
See Figure 8 and 9 (note)
See Figure 8 and 9 (note)
Min. Max. Unit
-45 +45
V
-45 +45
V
1.5
3
V
70 245 ns
100 245 ns
-35 +35
V
-500 500 mV
-150 150 mV
AMI Semiconductor – Rev. 1.4, May 05 - Preliminary
www.amis.com
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