The SN65HVD1050A-Q1 meets or exceeds the specifications of the ISO 11898 standard for use
in applications employing a Controller Area Network (CAN). The device is qualified for use in
As a CAN transceiver, this device provides differential transmit capability to the bus
and differential receive capability to a CAN controller at signaling rates up to 1 megabit per
second (Mbps). The signaling rate of a line is the number of voltage transitions that are made per
second expressed in the units bps (bits per second).
Designed for operation is especially harsh environments, the SN65HVD1050A-Q1 features
cross-wire, overvoltage, and loss of ground protection from –27 V to 40 V, overtemperature
protection, a –12-V to 12-V common-mode range, and withstands voltage transients according to ISO
Pin 8 provides for two different modes of operation: high-speed or silent mode. The
high-speed mode of operation is selected by connecting S (pin 8) to ground.
If a high logic level is applied to the S pin of the SN65HVD1050A-Q1, the device enters a
listen-only silent mode during which the driver is switched off while the receiver remains fully
In silent mode, all bus activity is passed by the receiver output to the local protocol
controller. When data transmission is required the local protocol controller must transition the
device to high speed mode by placing a logic low on the S pin to resume full operation.
A dominant time-out circuit in the SN65HVD1050A-Q1 prevents the driver from blocking
network communication with a hardware or software failure. The time-out circuit is triggered by a
falling edge on TXD (pin 1). If no rising edge is seen before the time-out constant of the circuit
expires, the driver is disabled. The circuit is then reset by the next rising edge on TXD.
VREF (pin 5) is available as a VCC / 2
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