SFFSAO3 September 2025 UCC33411-Q1 , UCC33421-Q1
Figure 4-1 shows the UCC33011(Q1), UCC33021(Q1), UCC33411(Q1), and UCC33421(Q1) pin diagram for the SSOP-16 package. For a detailed description of the device pins, see the Pin Configuration and Functions section in the UCC33011(Q1), UCC33021(Q1), UCC33411(Q1), and UCC33421(Q1) data sheets.
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| EN/FLT | 1 | The device is disabled. No output. | B |
| VINP | 2 | The device has no input. No output. | B |
| VINP | 3 | The device has no input. No output. | B |
| GNDP | 4 | No effect. Normal operation. | D |
| GNDP | 5 | No effect. Normal operation. | D |
| GNDP | 6 | No effect. Normal operation. | D |
| GNDP | 7 | No effect. Normal operation. | D |
| GNDP | 8 | No effect. Normal operation. | D |
| SEL | 9 | The output is set to 5.5V. | C |
| VCC | 10 | The output is shorted. No output. | B |
| VCC | 11 | The output is shorted. No output. | B |
| GNDS | 12 | No effect. Normal operation. | D |
| GNDS | 13 | No effect. Normal operation. | D |
| GNDS | 14 | No effect. Normal operation. | D |
| GNDS | 15 | No effect. Normal operation. | D |
| GNDS | 16 | No effect. Normal operation. | D |
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| EN/FLT | 1 | The EN/FLT pin is at an undetermined state. The output can be random. | B |
| VINP | 2 | The device operates normally with degradation on thermal performance. | C |
| VINP | 3 | The device operates normally with degradation on thermal performance. | C |
| GNDP | 4 | The device operates normally with degradation on thermal performance. | C |
| GNDP | 5 | The device operates normally with degradation on thermal performance. | C |
| GNDP | 6 | The device operates normally with degradation on thermal performance. | C |
| GNDP | 7 | The device operates normally with degradation on thermal performance. | C |
| GNDP | 8 | The device operates normally with degradation on thermal performance. | C |
| SEL | 9 | The SEL pin is at an undetermined state. The output voltage can change between 5V and 5.5V randomly. | C |
| VCC | 10 | The device operates normally with degradation on thermal performance. | C |
| VCC | 11 | The device operates normally with degradation on thermal performance. | C |
| GNDS | 12 | The device operates normally with degradation on thermal performance. | C |
| GNDS | 13 | The device operates normally with degradation on thermal performance. | C |
| GNDS | 14 | The device operates normally with degradation on thermal performance. | C |
| GNDS | 15 | The device operates normally with degradation on thermal performance. | C |
| GNDS | 16 | The device operates normally with degradation on thermal performance. | C |
| Pin Name | Pin No. | Shorted to | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|---|
| EN/FLT | 1 | VINP | The device is always enabled and cannot be turned off. | C |
| VINP | 2 | VINP | No effect. Normal operation. | D |
| VINP | 3 | GNDP | The device has no input. No output. | B |
| GNDP | 4 | GNDP | No effect. Normal operation. | D |
| GNDP | 5 | GNDP | No effect. Normal operation. | D |
| GNDP | 6 | GNDP | No effect. Normal operation | D |
| GNDP | 7 | GNDP | No effect. Normal operation. | D |
| GNDP | 8 | N/A | Not considered. Corner pin. | D |
| SEL | 9 | VCC | The output is set to 5V only. | C |
| VCC | 10 | VCC | No effect. Normal operation. | D |
| VCC | 11 | GNDS | The output is shorted. No output. | B |
| GNDS | 12 | GNDS | No effect. Normal operation. | D |
| GNDS | 13 | GNDS | No effect. Normal operation. | D |
| GNDS | 14 | GNDS | No effect. Normal operation. | D |
| GNDS | 15 | GNDS | No effect. Normal operation. | D |
| GNDS | 16 | N/A | Not considered. Corner pin. | D |
| Pin Name | Pin No. | Description of Potential Failure Effects | Failure Effect Class |
|---|---|---|---|
| EN/FLT | 1 | The device is always enabled and cannot be turned off. | C |
| VINP | 2 | No effect. Normal operation. | D |
| VINP | 3 | No effect. Normal operation. | D |
| GNDP | 4 | The device has no input. No output. | B |
| GNDP | 5 | The device has no input. No output. | B |
| GNDP | 6 | The device has no input. No output. | B |
| GNDP | 7 | The device has no input. No output. | B |
| GNDP | 8 | The device has no input. No output. | B |
| SEL | 9 | The output is set to 5V only. | C |
| VCC | 10 | No effect. Normal operation. | D |
| VCC | 11 | No effect. Normal operation. | D |
| GNDS | 12 | The output is shorted. No output. | B |
| GNDS | 13 | The output is shorted. No output. | B |
| GNDS | 14 | The output is shorted. No output. | B |
| GNDS | 15 | The output is shorted. No output. | B |
| GNDS | 16 | The output is shorted. No output. | B |