The SN65HVD1040A device 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
Designed for operation in especially harsh environments, the SN65HVD1040A-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 can withstand voltage transients according to
STB (pin 8) provides two different modes of operation: high-speed mode or low-current
standby mode. The high-speed mode of operation is selected by connecting STB (pin 8) to ground.
If a high logic level is applied to the STB pin of the SN65HVD1040A-Q1, the device enters
a low-current standby mode, while the receiver remains active in a low-power bus-monitor standby
In the low-current standby mode, a dominant bit greater than 5 µs on the bus is passed by
the bus-monitor circuit to the receiver output. The local protocol controller may then reactivate
the device when it needs to transmit to the bus.
A dominant time-out circuit in the SN65HVD1040A-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.
SPLIT (pin 5) is available as a VCC/2 common-mode bus voltage bias
for a split-termination network (see Application and Implementation).
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