SFFS569 December 2022 DP83TC814R-Q1 , DP83TC814S-Q1
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This document contains information for DP83TC814 to aid in a functional safety system design. Information provided are:
DP83TC814 was developed using a quality-managed development process, but was not developed in accordance with the IEC 61508 or ISO 26262 standards.
ADVANCE INFORMATION for preproduction products; subject to change without notice.
This section provides functional safety failure in time (FIT) rates for DP83TC814 based on two different industry-wide used reliability standards:
FIT IEC TR 62380 / ISO 26262 | FIT (Failures Per 109 Hours) |
---|---|
Total component FIT rate | 25 |
Die FIT rate | 3 |
Package FIT rate | 22 |
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 | 70 FIT | 70°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 DP83TC814 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 resulting from misuse or overstress.
Die Failure Modes | Failure Mode Distribution (%) |
---|---|
Fault in MDI transmitter causing IEEE spec compliance issues | 8 |
Fault in MDI transmitter causing high RF emissions | 4 |
Fault in MDI receiver causing poor-link quality/link-loss | 8 |
Fault in internal power circuits causing poor link quality and higher power consumption | 12 |
Fault in internal clock circuits causing IEEE compliance issues and poor link-quality | 8 |
Fault in GPIO causing higher RF emissions | 8 |
Fault in GPIO causing Rgmii/JEDEC/Datasheet spec violation | 8 |
Fault in ESD on MDI making IEC ESD performance lower than 8KV | 4 |
Fault in ESD on GPIOs making CDM performance lower than 2KV. | 4 |
Digital core has stuck or transient faults causing link-up or PCS faults | 36 |
The FMD in Table 3-1 excludes short-circuit faults across the isolation barrier. Faults for short circuits across the isolation barrier can be excluded according to ISO 61800-5-2:2016 if the following requirements are fulfilled:
Apply creepage and clearance requirements according to the specific equipment isolation standards of an application. Care must be taken to maintain the creepage and clearance distance of a board design to ensure that the mounting pads of the isolator on the printed-circuit board do not reduce this distance.
This section provides a failure mode analysis (FMA) for the pins of DP83TC814. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
Table 4-2 through Table 4-7 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. |
For a detailed description of the device pins, see the Pin Configuration and Functions section in the DP83TC814 data sheet.
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
MDC | 1 | No SMI communication available | B |
INT | 2 | No valid interrupt status | B |
RESET | 3 | Device in Reset state | B |
XO | 4 | Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known | B |
XI | 5 | Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known | B |
LED_1 | 6 | GPIO_1 not operational | B |
VDDA | 7 | Device is disabled. Core supply short | B |
DNC | 8 | No issue | D |
NC | 9 | No issue | D |
DNC | 10 | No issue | D |
VDDA | 11 | Device is disabled. Core supply short | B |
TRD_P | 12 | Link/data transfer cannot occur | A |
TRD_M | 13 | Link/data transfer cannot occur | A |
RX_ER | 14 | Valid data cannot be sent to MAC | B |
RX_CTRL | 15 | Valid data cannot be sent to MAC | B |
CLKOUT | 16 | GPIO_2 not operational. Daisy chaining won’t work if CLKOUT used to give clock to another PHY | B |
GND_ESC | 17 | No issue | D |
GND_ESC | 18 | No issue | D |
DNC | 19 | No issue | D |
DNC | 20 | No issue | D |
NC | 21 | No issue | D |
VDDMAC | 22 | MAC supply short | B |
RX_D3 | 23 | Valid data cannot be sent to MAC | B |
RX_D2 | 24 | Valid data cannot be sent to MAC | B |
RX_D1 | 25 | Valid data cannot be sent to MAC | B |
RX_D0 | 26 | Valid data cannot be sent to MAC | B |
RX_CLK | 27 | Valid data cannot be sent to MAC | B |
TX_CLK | 28 | Valid data cannot be received | B |
TX_CTRL | 29 | Valid data cannot be received | B |
TX_D3 | 30 | Valid data cannot be received | B |
TX_D2 | 31 | Valid data cannot be received | B |
TX_D1 | 32 | Valid data cannot be received | B |
TX_D0 | 33 | Valid data cannot be received | B |
VDDIO | 34 | IO supply short | B |
LED_0 | 35 | GPIO_0 not operational, link-up can still happen with register write for master | B |
MDIO | 36 | No SMI communication available | B |
DAP | GND | Appropriate connection | D |
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
MDC | 1 | No SMI communication available | B |
INT | 2 | Interrupt will not be available | B |
RESET | 3 | Normal Operation | D |
XO | 4 | Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known | B |
XI | 5 | Crystal resonator clock will not start-up. Device PLL not operational. PHY state not known | B |
LED_1 | 6 | Normal Operation | D |
VDDA | 7 | Device is disabled. Core supply open | B |
DNC | 8 | No issue | D |
NC | 9 | No issue | D |
DNC | 10 | No issue | D |
VDDA | 11 | Device is disabled. Core supply open | B |
TRD_P | 12 | Link/data transfer cannot occur | B |
TRD_M | 13 | Link/data transfer cannot occur | B |
RX_ER | 14 | Valid data cannot be sent to MAC | B |
RX_CTRL | 15 | Valid data cannot be sent to MAC | B |
CLKOUT | 16 | No issue | D |
GND_ESC | 17 | No issue | D |
GND_ESC | 18 | No issue | D |
DNC | 19 | No issue | D |
DNC | 20 | No issue | D |
NC | 21 | No issue | D |
VDDMAC | 22 | Device is disabled. MAC supply open | B |
RX_D3 | 23 | Valid data cannot be sent to MAC | B |
RX_D2 | 24 | Valid data cannot be sent to MAC | B |
RX_D1 | 25 | Valid data cannot be sent to MAC | B |
RX_D0 | 26 | Valid data cannot be sent to MAC | B |
RX_CLK | 27 | Valid data cannot be sent to MAC | B |
TX_CLK | 28 | Valid data cannot be received | B |
TX_CTRL | 29 | Valid data cannot be received | B |
TX_D3 | 30 | Valid data cannot be received | B |
TX_D2 | 31 | Valid data cannot be received | B |
TX_D1 | 32 | Valid data cannot be received | B |
TX_D0 | 33 | Valid data cannot be received | B |
VDDIO | 34 | Device is disabled. IO supply open | B |
LED_0 | 35 | Link-up can still happen with register write for master | B |
MDIO | 36 | No SMI communication available | B |
DAP | GND | Ground open | B |
Pin Name | Pin No. | Shorted to | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|---|
MDC | 1 | INT | No SMI communication available, No valid interrupt status | B |
INT | 2 | RESET | When device intending to give interrupt it enters reset. Also, when host resets the PHY, host will get ISR triggered | B |
RESET | 3 | XO | Device will keep getting reset | B |
XO | 4 | XI | Device in unknown state | B |
XI | 5 | LED_1 | Device in unknown state | B |
LED_1 | 6 | VDDA | Device may get damaged. | A |
VDDA | 7 | DNC | Device may get damaged | A |
DNC | 8 | NC | No issue | D |
NC | 9 | DNC | No issue | D |
DNC | 10 | VDDA | Device may get damaged | A |
VDDA | 11 | TRD_P | Link/data transfer cannot occur | A |
TRD_P | 12 | TRD_M | Link/data transfer cannot occur | B |
TRD_M | 13 | RX_ER | Link/data transfer cannot occur | B |
RX_ER | 14 | RX_CTRL | Communication to MAC may be lost. Valid data will trigger an error | B |
RX_CTRL | 15 | CLKOUT | Spurious data transfer. CLKOUT may have glitches | B |
CLKOUT | 16 | GND_ESC | No issue | D |
GND_ESC | 17 | GND_ESC | No issue | D |
GND_ESC | 18 | DNC | No issue | D |
DNC | 19 | DNC | No issue | D |
DNC | 20 | NC | No issue | D |
NC | 21 | VDDMAC | No issue | D |
VDDMAC | 22 | RX_D3 | Valid data cannot be sent to MAC | B |
RX_D3 | 23 | RX_D2 | Valid data cannot be sent to MAC | B |
RX_D2 | 24 | RX_D1 | MAC interface selection may be corrupt. Valid data cannot be sent to MAC | B |
RX_D1 | 25 | RX_D0 | MAC interface selection may be corrupt. Valid data cannot be sent to MAC | B |
RX_D0 | 26 | RX_CLK | MAC interface selection may be corrupt. Valid data cannot be sent to MAC | B |
RX_CLK | 27 | TX_CLK | Valid data cannot be exchanged with MAC | B |
TX_CLK | 28 | TX_CTRL | Valid data cannot be received | B |
TX_CTRL | 29 | TX_D3 | Valid data cannot be received | B |
TX_D3 | 30 | TX_D2 | Valid data cannot be received | B |
TX_D2 | 31 | TX_D1 | Valid data cannot be received | B |
TX_D1 | 32 | TX_D0 | Valid data cannot be received | B |
TX_D0 | 33 | VDDIO | Valid data cannot be received | B |
VDDIO | 34 | LED_0 | Valid data cannot be received. Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
LED_0 | 35 | MDIO | Link-up still possible through register write. Spurious LED glow/blink | B |
MDIO | 36 | MDC | No SMI communication available. | B |
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
MDC | 1 | No SMI communication available | B |
INT | 2 | No interrupt status | B |
RESET | 3 | Can never reset the device | B |
XO | 4 | PHY state not known | B |
XI | 5 | PHY state not known | B |
LED_1 | 6 | GPIO not operational, Device will enter standby mode. Need register write to start link-up | B |
VDDA | 7 | Device may not power up | B |
DNC | 8 | Device may get damaged | A |
NC | 9 | No issue | D |
DNC | 10 | Device may get damaged | A |
VDDA | 11 | Device may not power up | B |
TRD_P | 12 | Link/data transfer cannot occur. Device may get damaged | A |
TRD_M | 13 | Link/data transfer cannot occur. Device may get damaged | A |
RX_ER | 14 | PHY Address range restricted. MDC/MDIO communication could be lost. Device may get damaged when VDDIO and VDDMAC are different | B |
RX_CTRL | 15 | PHY Address range restricted. MDC/MDIO communication could be lost. Device may get damaged when VDDIO and VDDMAC are different | B |
CLKOUT | 16 | GPIO not operational. Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
GND_ESC | 17 | No issue | D |
GND_ESC | 18 | No issue | D |
DNC | 19 | Device may get damaged | A |
DNC | 20 | Device may get damaged | A |
NC | 21 | No issue | D |
VDDMAC | 22 | No issue | D |
RX_D3 | 23 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
RX_D2 | 24 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
RX_D1 | 25 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
RX_D0 | 26 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
RX_CLK | 27 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
TX_CLK | 28 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
TX_CTRL | 29 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
TX_D3 | 30 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
TX_D2 | 31 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
TX_D1 | 32 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
TX_D0 | 33 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
VDDIO | 34 | Appropriate connection | D |
LED_0 | 35 | GPIO_0 not operational. Device will be always in master mode. May need register write for linkup | B |
MDIO | 36 | No SMI communication available | B |
DAP | GND | Device may get damaged | A |
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
MDC | 1 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
INT | 2 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
RESET | 3 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
XO | 4 | PHY state not known | B |
XI | 5 | PHY state not known | B |
LED_1 | 6 | Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
VDDA | 7 | Device may not power up | B |
DNC | 8 | Device may get damaged | A |
NC | 9 | No issue | D |
DNC | 10 | Device may get damaged | A |
VDDA | 11 | Device may not power up | B |
TRD_P | 12 | Link/data transfer cannot occur. Device may get damaged | A |
TRD_M | 13 | Link/data transfer cannot occur. Device may get damaged | A |
RX_ER | 14 | PHY Address range restricted. MDC/MDIO communication could be lost. Invalid data triggered to the MAC | B |
RX_CTRL | 15 | PHY Address range restricted. MDC/MDIO communication could be lost. Invalid data triggered to the MAC | B |
CLKOUT | 16 | GPIO not operational. | B |
GND_ESC | 17 | No issue | D |
GND_ESC | 18 | No issue | D |
DNC | 19 | Device may get damaged | A |
DNC | 20 | Device may get damaged | A |
NC | 21 | No issue | D |
VDDMAC | 22 | No issue | D |
RX_D3 | 23 | Valid data cannot be sent to MAC | B |
RX_D2 | 24 | Valid data cannot be sent to MAC | B |
RX_D1 | 25 | Valid data cannot be sent to MAC | B |
RX_D0 | 26 | Valid data cannot be sent to MAC | B |
RX_CLK | 27 | Valid data cannot be sent to MAC | B |
TX_CLK | 28 | Valid data cannot be received from MAC | B |
TX_CTRL | 29 | Valid data cannot be received from MAC | B |
TX_D3 | 30 | Valid data cannot be received from MAC | B |
TX_D2 | 31 | Valid data cannot be received from MAC | B |
TX_D1 | 32 | Valid data cannot be received from MAC | B |
TX_D0 | 33 | Valid data cannot be received from MAC | B |
VDDIO | 34 | Device will be functional | D |
LED_0 | 35 | GPIO_0 not operational. Device will be always in master mode. May need register write for linkup. Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
MDIO | 36 | No SMI communication available. Device may get damaged when VDDIO and VDDMAC are of different voltage levels | A |
DAP | GND | Device may get damaged | A |
Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
---|---|---|---|
MDC | 1 | Device may get damaged | A |
INT | 2 | Device may get damaged | A |
RESET | 3 | Device may get damaged | A |
XO | 4 | PHY state not known | B |
XI | 5 | PHY state not known | B |
LED_1 | 6 | Device may get damaged | A |
VDDA | 7 | Appropriate connection | D |
DNC | 8 | Device may get damaged | A |
NC | 9 | No issue | D |
DNC | 10 | Device may get damaged | A |
VDDA | 11 | Appropriate connection | D |
TRD_P | 12 | Link/data transfer cannot occur. Device may get damaged | A |
TRD_M | 13 | Link/data transfer cannot occur. Device may get damaged | A |
RX_ER | 14 | Device may get damaged | A |
RX_CTRL | 15 | Device may get damaged | A |
CLKOUT | 16 | Device may get damaged | A |
GND_ESC | 17 | No issue | D |
GND_ESC | 18 | No issue | D |
DNC | 19 | Device may get damaged | A |
DNC | 20 | Device may get damaged | A |
NC | 21 | No issue | D |
VDDMAC | 22 | Device will be functional | D |
RX_D3 | 23 | Device may get damaged | A |
RX_D2 | 24 | Device may get damaged | A |
RX_D1 | 25 | Device may get damaged | A |
RX_D0 | 26 | Device may get damaged | A |
RX_CLK | 27 | Device may get damaged | A |
TX_CLK | 28 | Device may get damaged | A |
TX_CTRL | 29 | Device may get damaged | A |
TX_D3 | 30 | Device may get damaged | A |
TX_D2 | 31 | Device may get damaged | A |
TX_D1 | 32 | Device may get damaged | A |
TX_D0 | 33 | Device may get damaged | A |
VDDIO | 34 | Device will be functional | D |
LED_0 | 35 | Device may get damaged | A |
MDIO | 36 | No SMI communication available. Device may get damaged | A |
DAP | GND | Device may get damaged | A |
DATE | REVISION | NOTES |
---|---|---|
December 2022 | * | Initial Release |