Other Parts Discussed in Thread: SN65HVD232, , TCAN4550, TCAN334, TCAN1043
Hi Team,
Do we have Q1 version about CAN which only need 3.3V supply?
I saw TCAN33x ,but just industrial version
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Hi Team,
Do we have Q1 version about CAN which only need 3.3V supply?
I saw TCAN33x ,but just industrial version
Hi Amelie,
The SN65HVD23x family comes in -Q1 versions:
http://www.ti.com/product/SN65HVD232Q-Q1
http://www.ti.com/product/SN65HVD233-Q1
Please let us know if you have any questions on these devices.
Regards,
Max
Hi Team,
Thanks for your reply.
May I ask SN65HVD232/233Q or TCAN337 have smart wake, which means this CAN can judge whether it need to wake when interrupt occured?
My customer want to choose CAN 3.3V supply with smart wake (such as TCAN4550)... Thanks!
Amelie,
The 3.3V CAN transceivers can only wake up through CAN bus wake-up. I'm not sure I know exactly what you mean by smart wake, can you elaborate?
Regards,
Just like TCAN4550,when CAN bus has signal this CAN can judge whether this signal belong to itself and decide whether need to wake
Amelie,
There are a few different wake-up mechanisms used in CAN:
1. Detection of a dominant state on the bus, which would not be specific to any particular node. This was the original ISO-defined method that is implemented in some older transceivers.
2. Detection of a wake-up pattern, which would not be specific to any particular node. This is defined in the current ISO 11898-2:2016 and is implemented in TCAN334 and TCAN4550.
3. Detection of a wake-up frame, which could selectively address a single node. This is a newer feature included in ISO 11898-2:2016 that is sometimes referred to as selective wake and can be used to implement partial networking. This is supported in TCAN1145.
Regards,
Max
Hi Max,
Thanks for your kindly reply.
As for TCAN1042, is it belong to 1(Detection of a dominant state on the bus)?
As for TCAN1043, is it belong to 2(Detection of a wake-up pattern)?
Thanks!
Amelie,
Both TCAN1042 and TCAN1043 wake up using method #2 (detection of a wake-up pattern). The difference is in the low power modes they support. TCAN1042 supports a standby mode in which the system would still need to keep the lower, logic-level power rail active. TCAN1043 supports this mode as well as a deeper sleep mode that allows all lower-voltage rails to power off and then later become re-enabled by the TCAN1043's "INH" output control (which asserts high when a wake-up request occurs). In this state the TCAN1043 is powered solely by the battery rail.
You can read more about the low power modes supported by automotive transceivers in this app note:
https://www.ti.com/lit/an/slla442/slla442.pdf
Regards,
Max