SFFSB42 March 2026 ISO6442
Figure 1-1 shows the ISO6442 pin diagram for the DW-16 Wide-SOIC, DFP-16 Wide-SSOP, and DBQ-16 SSOP packages. For a detailed description of the device pins, see the Pin Configuration and Functions section in the ISO6442 datasheet.
| Pin Name | Pin Number | Potential Failure Mode | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|---|
| VCC1 | 1 | Short-Circuited to Ground (Side-1) | The device has no power on side-1 (the supply input is shorted to ground). The outputs of OUTA, OUTB, and OUTC are at the default logic state. The output state of OUTD is undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND1 pins (pin2 and pin8); potentially damaging the device. | A |
| VCC1 | 1 | Open-Circuited | The device has no power on side-1 (the supply input is open). The outputs of OUTA, OUTB, and OUTC are at the default logic state. The output state of OUTD is undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. | A |
| VCC1 | 1 | Short-Circuited to Pin2 (GND1) | The device has no power on side-1 (the supply input is shorted to ground). The outputs of OUTA, OUTB, and OUTC are at the default logic state. The output state of OUTD is undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND1 pins (pin2 and pin8); potentially damaging the device. | A |
| VCC1 | 1 | Short-Circuited to Supply (Side-1) | The device continues to function as expected. Normal operation. | D |
| GND1 | 2 | Short-Circuited to Ground (Side-1) | The device continues to function as expected. Normal operation. | D |
| GND1 | 2 | Open-Circuited | The device receives return ground through pin8 (GND1). Normal operation. | D |
| GND1 | 2 | Short-Circuited to Pin3 (INA) | The input signal is shorted to ground, so the output of OUTA is stuck low. Communication through channel A is corrupted. | B |
| GND1 | 2 | Short-Circuited to Supply (Side-1) | The device has no power on side-1 (the supply input is shorted to ground). The outputs of OUTA, OUTB, and OUTC are at the default logic state. The output state of OUTD is undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND1 pins (pin2 and pin8); potentially damaging device. | A |
| INA | 3 | Short-Circuited to Ground (Side-1) | The input signal is shorted to ground, so the output of OUTA is stuck low. Communication through channel A is corrupted. | B |
| INA | 3 | Open-Circuited | Communication through channel A is not possible. The output of OUTA is at the default state (weak internal pullup or pulldown to the default state). | B |
| INA | 3 | Short-Circuited to Pin4 (INB) | Communication is corrupted for either channel or both channels. | B |
| INA | 3 | Short-Circuited to Supply (Side-1) | The input signal is shorted to supply, so the output of OUTA is stuck high. Communication through channel A is corrupted. | B |
| INB | 4 | Short-Circuited to Ground (Side-1) | The input signal is shorted to ground, so the output of OUTB is stuck low. Communication through channel B is corrupted. | B |
| INB | 4 | Open-Circuited | Communication through channel B is not possible. The output of OUTB is at the default state (weak internal pullup or pulldown to the default state). | B |
| INB | 4 | Short-Circuited to Pin5 (OUTC) | Communication is corrupted for either channel or both channels. With an opposite logic state on both channels, high current can flow between the signals on INB, supply, and ground in OUTC and possibly cause damage to the device. | A |
| INB | 4 | Short-Circuited to Supply (Side-1) | The input signal is shorted to supply, so the output of OUTB is stuck high. Communication through channel B is corrupted. | B |
| OUTC | 5 | Short-Circuited to Ground (Side-1) | The output of OUTC is shorted to ground. Communication through channel C is corrupted. Damage to the device is possible if INC is driven high for an extended period of time. | A |
| OUTC | 5 | Open-Circuited | The state of the OUTC output is undetermined. Communication through channel C is corrupted. | B |
| OUTC | 5 | Short-Circuited to Pin6 (OUTD) | Communication is corrupted for either channel or both channels. With an opposite logic state on both channels, high current can flow between the pins, supply, and ground and possibly cause damage to the device. | A |
| OUTC | 5 | Short-Circuited to Supply (Side-1) | The output of OUTC is stuck high. Communication through channel C is corrupted. Device damage is possible if INC is driven low for an extended period of time. | A |
| OUTD | 6 | Short-Circuited to Ground (Side-1) | The output of OUTD is shorted to ground. Communication through channel D is corrupted. Damage to the device is possible if IND is driven high for an extended period of time. | A |
| OUTD | 6 | Open-Circuited | The output state of OUTD is undetermined. Communication through channel D is corrupted. | B |
| OUTD | 6 | Short-Circuited to Pin7 (EN1) | Communication is corrupted on channels C and D. The shorted external signal to EN1 with OUTD results in an unpredictable and non-deterministic level at the EN1 input and OUTD output when the input level to EN1 and the input level to IND (and thus OUTD) do not match. Thus, the enable status of the output buffers from EN1 which impacts channels C and D, is unknown, as are the levels of OUTC and OUTD Damage to the device is possible if the levels of EN1 and OUTD do not match for an extended period of time. | A |
| OUTD | 6 | Short-Circuited to Supply (Side-1) | OUTD is stuck high. Communication through channel D is corrupted. Damage to the device is possible if IND is driven low for an extended period of time. | A |
| EN1 | 7 | Short-Circuited to Ground (Side-1) | EN1 is stuck low so the output buffer for OUTD is not enabled. Communication is corrupted for channel D. | B |
| EN1 | 7 | Open-Circuited | Control on the input of EN1 is lost. EN1 has a weak internal pullup to VCC1. Communication on channel D continues normally since the weak internal pullup to VCC1 on EN1 enables the output buffer for OUTD. | B |
| EN1 | 7 | Short-Circuited to Pin8 (GND1) | Control on the input of EN1 is lost since EN1 is stuck low. The output buffer for OUTD is not enabled. Communication is corrupted for channel D. | B |
| EN1 | 7 | Short-Circuited to Supply (Side-1) | Control on the input of EN1 is lost since EN1 is shorted to a logic high. Communication on channel D continues normally since the high on EN1 enables the output buffer for OUTD. | B |
| GND1 | 8 | Short-Circuited to Ground (Side-1) | The device continues to function as expected. Normal operation. | D |
| GND1 | 8 | Open-Circuited | The device receives return ground through pin2 (GND1). Normal operation. | D |
| GND1 | 8 | Short-Circuited to Pin9 (N/A) | Not applicable (N/A), corner pin. | N/A |
| GND1 | 8 | Short-Circuited to Supply (Side-1) | The device has no power on side-1 (the supply input is shorted to ground). The outputs of OUTA, OUTB, and OUTC are at the default logic state. The output state of OUTD is undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND1 pins (pin2 and pin8); potentially damaging device. | A |
| GND2 | 9 | Short-Circuited to Ground (Side-2) | The device continues to function as expected. Normal operation. | D |
| GND2 | 9 | Open-Circuited | The device receives return ground through pin15 (GND2). Normal operation. | D |
| GND2 | 9 | Short-Circuited to Pin10 (EN2) | EN2 is stuck low so the output buffers for OUTA, OUTB, and OUTC are not enabled. Communication is corrupted for channels A, B, and C. | B |
| GND2 | 9 | Short-Circuited to Supply (Side-2) | The device has no power on side-2 (the supply input is shorted to ground). The output of OUTD is at the default logic state. The output state of OUTA, OUTB, and OUTC are undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND2 pins (pin9 and pin15); potentially damaging the device. | A |
| EN2 | 10 | Short-Circuited to Ground (Side-2) | EN2 is stuck low so the output buffers for OUTA, OUTB, and OUTC are not enabled. Communication is corrupted for channels A, B, and C. | B |
| EN2 | 10 | Open-Circuited | Control on the input of EN2 is lost. EN2 has a weak internal pullup to VCC2. Communication on channels A, B, and C continues normally since the weak internal pullup to VCC2 on EN2 enables the output buffers for OUTA, OUTB, and OUTC. | B |
| EN2 | 10 | Short-Circuited to Pin11 (IND) | Communication is corrupted on channels A, B and D. The shorted external signals to EN2 and IND result in an unpredictable and non-deterministic level at the EN2 and IND inputs when the input level to EN2 and input level to IND do not match. Thus, the enable status of the output buffers from EN2, which impacts channels A and B, are unknown, as are the levels of OUTA and OUTB. The input level to IND is unknown, as is the output on OUTD. | B |
| EN2 | 10 | Short-Circuited to Supply (Side-2) | Control on the input of EN2 is lost since EN2 is shorted to a logic high. Communication from the on channels A, B, and C continues normally since the high on EN2 enables the output buffers for OUTA, OUTB, and OUTC. | B |
| IND | 11 | Short-Circuited to Ground (Side-2) | The input signal is shorted to ground, so the output of OUTD is stuck low. Communication through channel D is corrupted. | B |
| IND | 11 | Open-Circuited | Communication through channel D is not possible. The output of OUTD is at the default state (weak internal pullup or pulldown to the default state). | B |
| IND | 11 | Short-Circuited to Pin12 (INC) | Communication is corrupted for either channel or both channels. | B |
| IND | 11 | Short-Circuited to Supply (Side-2) | The input signal is shorted to supply, so the output of OUTD is stuck high. Communication through channel D is corrupted. | B |
| INC | 12 | Short-Circuited to Ground (Side-2) | The input signal is shorted to ground, so the output of OUTC is stuck low. Communication through channel C is corrupted. | B |
| INC | 12 | Open-Circuited | Communication through channel C is not possible. The output of OUTC is at the default state (weak internal pullup or pulldown to the default state). | B |
| INC | 12 | Short-Circuited to Pin6 (OUTB) | Communication is corrupted for either channel or both channels. With an opposite logic state on both channels, high current can flow between the signals on INC, supply, and ground in OUTB and possibly cause damage to the device. | A |
| INC | 12 | Short-Circuited to Supply (Side-2) | The input signal is shorted to supply, so the output of OUTC is stuck high. Communication through channel C is corrupted. | B |
| OUTB | 13 | Short-Circuited to Ground (Side-2) | The output of OUTB is shorted to ground. Communication through channel B is corrupted. Damage to the device is possible if INB is driven high for an extended period of time. | A |
| OUTB | 13 | Open-Circuited | The state of the OUTB output is undetermined. Communication through channel B is corrupted. | B |
| OUTB | 13 | Short-Circuited to Pin14 (OUTA) | Communication is corrupted for either channel or both channels. With an opposite logic state on both channels, high current can flow between the pins, supply, and ground and possibly cause damage to the device. | A |
| OUTB | 13 | Short-Circuited to Supply (Side-2) | The output of OUTB is stuck high. Communication through channel B is corrupted. Damage to the device is possible if INB is driven low for an extended period of time. | A |
| OUTA | 14 | Short-Circuited to Ground (Side-2) | The output of OUTA is shorted to ground. Communication through channel A is corrupted. Damage to the device is possible if INA is driven high for an extended period of time. | A |
| OUTA | 14 | Open-Circuited | The state of the OUTA output is undetermined. Communication through channel A is corrupted. | B |
| OUTA | 14 | Short-Circuited to Pin15 (GND2) | The output of OUTA is shorted to ground. Communication through channel A is corrupted. Damage to the device is possible if INA is driven high for an extended period of time. | A |
| OUTA | 14 | Short-Circuited to Supply (Side-2) | The output of OUTA is stuck high. Communication through channel A is corrupted. Damage to the device is possible if INA is driven low for an extended period of time. | A |
| GND2 | 15 | Short-Circuited to Ground (Side-2) | The device continues to function as expected. Normal operation. | D |
| GND2 | 15 | Open-Circuited | The device receives return ground through pin9 (GND2). Normal operation. | D |
| GND2 | 15 | Short-Circuited to Pin16 (VCC2) | The device has no power on side-2 (the supply input is shorted to ground). The output of OUTD is at the default logic state. The output states of OUTA, OUTB, and OUTC are undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND2 pins (pin9 and pin15) potentially damaging the device. | A |
| GND2 | 15 | Short-Circuited to Supply (Side-2) | The device has no power on side-2 (the supply input is shorted to ground). The output of OUTD is at the default logic state. The output state of OUTA, OUTB, and OUTC are undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND2 pins (pin9 and pin15); potentially damaging the device. | A |
| VCC2 | 16 | Short-Circuited to Ground (Side-2) | The device has no power on side-2 (the supply input is shorted to ground). The output of OUTD is at the default logic state. The output states of OUTA, OUTB, and OUTC are undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. This short circuit potentially causes high current to flow between the two GND2 pins (pin9 and pin15); potentially damaging the device. | A |
| VCC2 | 16 | Open-Circuited | The device has no power on side-2 (the supply input is open). The output of OUTD is at the default logic state. The output states of OUTA, OUTB, and OUTC are undetermined. Observe that the absolute maximum ratings for all pins of the device are met; otherwise, damage to the device is possible. | A |
| VCC2 | 16 | Short-Circuited to Pin1 (N/A) | Not applicable (N/A), corner pin. | N/A |
| VCC2 | 16 | Short-Circuited to Supply (Side-2) | The device continues to function as expected. Normal operation. | D |