Datasheet

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SN65HVD230
SN65HVD231
SN65HVD232
www.ti.com SLOS346K –MARCH 2001– REVISED FEBRUARY 2011
delay of typical bus cable is 5 ns/m, slope control with the 100-kΩ resistor decreases the allowable bus length by
the difference between the 500-ns max loop delay and the loop delay with no slope control, 70.7 ns. This
equates to (500-70.7 ns)/5 ns, or approximately 86 m less bus length. This slew-rate/bus length trade-off to
reduce electromagnetic interference to adjoining circuits from the bus can also be solved with a quality shielded
bus cable.
Figure 35. 70.7-ns Loop Delay Through the HVD230 With R
S
= 0
ISO 11898 COMPLIANCE OF SN65HVD230 FAMILY OF 3.3-V CAN TRANSCEIVERS
Introduction
Many users value the low power consumption of operating their CAN transceivers from a 3.3 V supply. However,
some are concerned about the interoperability with 5-V supplied transceivers on the same bus. This report
analyzes this situation to address those concerns.
Differential Signal
CAN is a differential bus where complementary signals are sent over two wires and the voltage difference
between the two wires defines the logical state of the bus. The differential CAN receiver monitors this voltage
difference and outputs the bus state with a single-ended output signal.
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