SFFS085 December 2021 TLIN2024A-Q1
This section provides a Failure Mode Analysis (FMA) for the pins of the TLIN2024A-Q1. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
Table 4-2 through Table 4-5 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 4-1.
| Class | Failure Effects |
|---|---|
| A | Potential device damage that affects functionality |
| B | No device damage, but loss of functionality |
| C | No device damage, but performance degradation |
| D | No device damage, no impact to functionality or performance |
Figure 4-1 shows the device pin diagram. For a detailed description of the device pins, please refer to the Pin Configuration and Functions section in the TLIN2024A-Q1 data sheet.
Following are the assumptions of use and the device configuration assumed for the pin FMA in this section:
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| RXD1 | 1 | RXD1 biased dominant, no communication from LIN1 bus to MCU possible. | B |
| EN1 | 2 | LIN1 channel may only operate in standby mode after power on. If short on EN1 occurs in normal mode, LIN1 channel would be forced to enter sleep mode and could disable LIN communication | B |
| TXD1 | 3 | TXD1 biased dominant, no communication from MCU to LIN1 bus possible. | B |
| RXD2 | 4 | RXD2 biased dominant, no communication from LIN2 bus to MCU possible. | B |
| EN2 | 5 | LIN2 channel may only operate in standby mode after power on. If short on EN2 occurs in normal mode, LIN2 channel would be forced to enter sleep mode and could disable LIN communication. | B |
| TXD2 | 6 | TXD2 biased dominant, no communication from MCU to LIN2 bus possible. | B |
| RXD3 | 7 | RXD3 biased dominant, no communication from LIN3 bus to MCU possible. | B |
| EN3 | 8 | LIN3 channel may only operate in standby mode after power on. If short on EN3 occurs in normal mode, LIN3 channel would be forced to enter sleep mode and could disable LIN communication. | B |
| TXD3 | 9 | TXD3 biased dominant, no communication from MCU to LIN3 bus possible. | B |
| RXD4 | 10 | RXD4 biased dominant, no communication from LIN4 bus to MCU possible. | B |
| EN4 | 11 | LIN4 channel may only operate in standby mode after power on. If short on EN4 occurs in normal mode, LIN4 channel would be forced to enter sleep mode and could disable LIN communication. | B |
| TXD4 | 12 | TXD4 biased dominant, no communication from MCU to LIN4 bus possible. | B |
| NC | 13 | No impact to performance. | D |
| GND2 | 14 | None | D |
| LIN4 | 15 | LIN4 biased dominant, no LIN communication possible. | B |
| VSUP2 | 16 | Channels 3 and 4 unpowered and will not function. | B |
| LIN3 | 17 | LIN3 biased dominant, no LIN communication possible. | B |
| NC | 18 | No impact to performance. | D |
| GND1 | 19 | None | D |
| LIN2 | 20 | LIN2 biased dominant, no LIN communication possible. | B |
| VSUP1 | 21 | Channels 1 and 2 unpowered and will not function. | B |
| LIN1 | 22 | LIN1 biased dominant, no LIN communication possible. | B |
| NC | 23 | No impact to performance. | D |
| NC | 24 | No impact to performance. | D |
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| RXD1 | 1 | No communication from LIN1 bus to MCU possible. | B |
| EN1 | 2 | Biased low due to internal pull-down so LIN1 in standby mode. | B |
| TXD1 | 3 | No communication from MCU to LIN1 bus possible. | B |
| RXD2 | 4 | No communication from LIN2 bus to MCU possible. | B |
| EN2 | 5 | Biased low due to internal pull-down so LIN2 in standby mode. | B |
| TXD2 | 6 | No communication from MCU to LIN2 bus possible. | B |
| RXD3 | 7 | No communication from LIN3 bus to MCU possible. | B |
| EN3 | 8 | Biased low due to internal pull-down so LIN3 in standby mode. | B |
| TXD3 | 9 | No communication from MCU to LIN3 bus possible. | B |
| RXD4 | 10 | No communication from LIN4 bus to MCU possible. | B |
| EN4 | 11 | Biased low due to internal pull-down so LIN4 in standby mode. | B |
| TXD4 | 12 | No communication from MCU to LIN4 bus possible. | B |
| NC | 13 | No impact to performance. | D |
| GND2 | 14 | Channels 3 and 4 are unpowered and will not function. | B |
| LIN4 | 15 | No LIN4 communication possible. | B |
| VSUP2 | 16 | Channels 3 and 4 are unpowered and will not function. | B |
| LIN3 | 17 | No LIN3 communication possible. | B |
| NC | 18 | No impact to performance. | D |
| GND1 | 19 | Chanels 1 and 2 are unpowered and will not function. | B |
| LIN2 | 20 | No LIN2 communication possible. | B |
| VSUP1 | 21 | Channels 1 and 2 are unpowered and will not function. | B |
| LIN1 | 22 | No LIN1 communication possible. | B |
| NC | 23 | No impact to performance. | D |
| NC | 24 | No impact to performance. | D |
| Pin Name | Pin No. | Shorted to | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|---|
| RXD1 | 1 | EN1 | LIN1 will go into sleep mode when a dominant bit is received on the LIN1 bus, disabling communication. | B |
| EN1 | 2 | TXD1 | With TXD toggling, LIN1 channel will transition between normal and sleep mode, corrupting communication. | B |
| TXD1 | 3 | RXD2 | Communication on TXD1 will corrupt the received data from LIN2 to RXD2. | B |
| RXD2 | 4 | EN2 | With data toggling on RXD2 via LIN2 bus, EN2 toggles and causes LIN2 channel to transition between normal and sleep modes. | B |
| EN2 | 5 | TXD2 | With TXD toggling, LIN2 channel will transition between normal and sleep mode, corrupting communication. | B |
| TXD2 | 6 | RXD3 | Communication on TXD2 will corrupt the received data from LIN3 to RXD3. | B |
| RXD3 | 7 | EN3 | With data toggling on RXD3 via LIN3 bus, EN3 toggles and causes LIN3 channel to transition between normal and sleep modes. | B |
| EN3 | 8 | TXD3 | With TXD toggling, LIN3 channel will transition between normal and sleep mode, corrupting communication. | B |
| TXD3 | 9 | RXD4 | Communication on TXD3 will corrupt the received data from LIN4 to RXD4. | B |
| RXD4 | 10 | EN4 | With data toggling on RXD4 via LIN4 bus, EN4 toggles and causes LIN4 channel to transition between normal and sleep modes. | B |
| EN4 | 11 | TXD4 | With TXD toggling, LIN4 channel will transition between normal and sleep mode, corrupting communication. | B |
| TXD4 | 12 | NC | No impact to performance. | D |
| NC | 13 | GND2 | No impact to performance. | D |
| GND2 | 14 | LIN4 | LIN4 biased dominant, no LIN4 communication possible. | B |
| LIN4 | 15 | VSUP2 | LIN4 biased recessive, no LIN4 communication possible. | B |
| VSUP2 | 16 | LIN3 | LIN3 biased dominant, no LIN3 communication possible. | B |
| LIN3 | 17 | NC | No impact to performance. | D |
| NC | 18 | GND1 | No impact to performance. | D |
| GND1 | 19 | LIN2 | LIN2 biased dominant, no LIN2 communication possible. | B |
| LIN2 | 20 | VSUP1 | LIN2 biased recessive, no LIN2 communication possible. | B |
| VSUP1 | 21 | LIN1 | LIN1 biased dominant, no LIN1 communication possible. | B |
| LIN1 | 22 | NC | No impact to performance. | D |
| NC | 23 | NC | No impact to performance. | D |
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
| RXD1 | 1 | Absolute maximum voltage violation, transceiver may be damaged | A |
| EN1 | 2 | Absolute maximum voltage violation, transceiver may be damaged | A |
| TXD1 | 3 | Absolute maximum voltage violation, transceiver may be damaged | A |
| RXD2 | 4 | Absolute maximum voltage violation, transceiver may be damaged | A |
| EN2 | 5 | Absolute maximum voltage violation, transceiver may be damaged | A |
| TXD2 | 6 | Absolute maximum voltage violation, transceiver may be damaged | A |
| RXD3 | 7 | Absolute maximum voltage violation, transceiver may be damaged | A |
| EN3 | 8 | Absolute maximum voltage violation, transceiver may be damaged | A |
| TXD3 | 9 | Absolute maximum voltage violation, transceiver may be damaged | A |
| RXD4 | 10 | Absolute maximum voltage violation, transceiver may be damaged | A |
| EN4 | 11 | Absolute maximum voltage violation, transceiver may be damaged | A |
| TXD4 | 12 | Absolute maximum voltage violation, transceiver may be damaged | A |
| NC | 13 | No impact to performance | D |
| GND2 | 14 | Device is unpowered and will not funtion | B |
| LIN4 | 15 | LIN4 biased recessive, no LIN4 communication possible | B |
| VSUP2 | 16 | None | D |
| LIN3 | 17 | LIN3 biased recessive, no LIN3 communication possible | B |
| NC | 18 | No impact to performance | D |
| GND1 | 19 | Device is unpowered and will not funtion | B |
| LIN2 | 20 | LIN2 biased recessive, no LIN2 communication possible | B |
| VSUP1 | 21 | None | D |
| LIN1 | 22 | LIN1 biased recessive, no LIN1 communication possible | B |
| NC | 23 | No impact to performance | D |
| NC | 24 | No impact to performance | D |