CAN Bit Rate from Cable Delay
Estimate a CAN bit-rate ceiling using cable length, one-way propagation delay per metre, transceiver delay, and the permitted propagation fraction of a bit. This is a timing-budget estimate, not a substitute for bit-timing analysis.
Description
Estimate a CAN bit-rate ceiling using cable length, one-way propagation delay per metre, transceiver delay, and the permitted propagation fraction of a bit. This is a timing-budget estimate, not a substitute for bit-timing analysis.
CAN Bit Rate from Cable Delay: Estimate a CAN bit-rate ceiling using cable length, one-way propagation delay per metre, transceiver delay, and the permitted propagation fraction of a bit. This is a timing-budget estimate, not a substitute for bit-timing analysis.
When to use CAN Bit Rate from Cable Delay
Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.
- Bus length (m)
- Required number input.
- Cable delay (ns/m)
- Required number input.
- Transceiver round-trip delay (ns)
- Required number input.
- Propagation time fraction
- Required number input.
How CAN Bit Rate from Cable Delay works
Estimate a CAN bit-rate ceiling using cable length, one-way propagation delay per metre, transceiver delay, and the permitted propagation fraction of a bit. This is a timing-budget estimate, not a substitute for bit-timing analysis. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.1
- Max Bit Rate Bps
- The resulting max bit rate bps returned as a number.
Limitations and assumptions
- CAN timing and loading depend on oscillator tolerance, transceiver delays, propagation, bit timing, cable impedance, topology, termination, frame mix, and error traffic. Nominal bitrate-versus-length rules do not establish interoperability or standards compliance.
- Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.
Alternative or Complementary approaches
Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.
References
-
CAN bus — Wikipedia contributors
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