SLLA525A October 2020 – April 2021 TCAN1043-Q1 , TCAN1043G-Q1 , TCAN1043H-Q1 , TCAN1043HG-Q1
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This document contains information for TCAN1043-Q1 (as well as the TCAN1043G-Q1, TCAN1043H-Q1, and TCAN1043HG-Q1), a controller area network (CAN) transceiver, to aid in a functional safety system design. The TCAN1043-Q1 comes in the SOIC (D) and VSON (DMT) packages. Information provided are:
Figure 1-1 shows the device functional block diagram for reference.
This section provides Functional Safety Failure In Time (FIT) rates for TCAN1043-Q1 (as well as TCAN1043G-Q1, TCAN1043H-Q1, and TCAN1043HG-Q1) based on two different industry-wide used reliability standards:
FIT IEC TR 62380 / ISO 26262 | FIT (Failures Per 109 Hours) 14-pin SOIC (D) | FIT (Failures Per 109 Hours) 14-pin VSON (DMT) |
---|---|---|
Total Component FIT Rate | 21 | 9 |
Die FIT Rate | 3 | 3 |
Package FIT Rate | 18 | 6 |
The failure rate and mission profile information in Table 2-1 comes from the Reliability data handbook IEC TR 62380 / ISO 26262 part 11:
Table | Category | Reference FIT Rate | Reference Virtual TJ |
---|---|---|---|
5 | CMOS,
BICMOS Digital, analog / mixed | 20 FIT | 55°C |
The Reference FIT Rate and Reference Virtual TJ (junction temperature) in Table 2-2 come from the Siemens Norm SN 29500-2 tables 1 through 5. Failure rates under operating conditions are calculated from the reference failure rate and virtual junction temperature using conversion information in SN 29500-2 section 4.
The failure mode distribution estimation for TCAN1043-Q1 (as well as TCAN1043G-Q1, TCAN1043H-Q1, and TCAN1043HG-Q1) in Table 3-1 comes from the combination of common failure modes listed in standards such as IEC 61508 and ISO 26262, the ratio of sub-circuit function size and complexity and from best engineering judgment.
The failure modes listed in this section reflect random failure events and do not include failures due to misuse or overstress.
Die Failure Modes | Failure Mode Distribution (%) |
---|---|
Receiver fail | 35% |
Transmitter fail | 35% |
System stuck in sleep mode | 15% |
CANL or CANH driver biased dominant indefinitely | 5% |
Short-circuit of any two pins | 5% |
Reports erroneous fault condition | 5% |