The PCA82C250 and PCA82C251 are advanced transceiver products for use in automotive and general industrial applications with transfer rates up to 1 Mbit/s. They support the differential bus signal representation being described in the international standard for in-vehicle CAN high-speed applications (ISO 11898).
The document introduces the CAN protocol (ISO 11898) and explains how the PCA82C250 and PCA82C251 transceivers implement the Physical Medium Attachment layer. It covers basic specifications such as a maximum data rate of 1 Mbit/s and supply voltage options, and discusses the functional equivalence of the two parts.
Further sections detail operation modes (high‑speed, slope‑control, standby), bus‑length calculations, termination concepts, and provides example circuits. Appendices give the mathematical derivations for voltage at the receiver node and the maximum allowable bus length under worst‑case conditions.
| Maximum data rate | 1 Mbit/s |
|---|---|
| Nominal supply voltage (PCA82C250) | 12 V |
| Nominal supply voltage (PCA82C251) | 12 V and/or 24 V |
The transceivers support a maximum data rate of up to 1 Mbit/s.
The PCA82C250 operates from a nominal 12 V supply, while the PCA82C251 can be powered from 12 V or 24 V.