TCAN1042-Q1: About propagation delay time

Hello Kato-san,

Note that the TCAN1042 datasheet specifies maximum values on the total loop delay, which includes both contributions from the driver (tpHR, tpLD) and the receiver (tpRH, tpDL).  For your reference, though, I can let you know the minimum and maximum values we measured for the individual delays when characterizing the performance of these devices:

Driver

	Min	Max
tpHR	69.3ns	82.0ns
tpLD	46.1ns	58.4ns

Receiver

	Min	Max
tpRH	40.2ns	70.2ns
tpDL	48.1ns	70.5ns

Most of the variation was observed to be due to temperature.  Within a given set of operating conditions, these delays were similar from unit to unit (typical standard deviations of about 0.5 ns).

Please let me know if you have any further questions.

Max

Kato-san,

This data was based off of three different lots, each consisting of 40 units. The ambient temperature was varied from -55 C to +125 C, and the voltage was varied from 4.5 V to 5.5 V. The standard deviation was similar for each parameter and was found to be about 0.5 ns.

I'm unfortunately not sure why the existing datasheet does not publish minimum/maximum values for this parameter. I believe it may be because the loop time specification was considered a superset of these timing values (since the loop time includes the propagation delays and rise/fall times of both the transmit and receiver signal paths, and this is typically what needs to be used in analyzing the timing of a CAN bus).

Regards,
Max