SFFSAO3 September   2025 UCC33411-Q1 , UCC33421-Q1

 

  1.   1
  2.   Trademarks
  3. 1Overview
  4. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 SSOP-16 Package
  5. 3Failure Mode Distribution (FMD)
  6. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SSOP-16 Package
  7. 5Revision History

4.1 SSOP-16 Package

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.

Figure 4-1 Pin Diagram (SSOP-16 Package)
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
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
Table 4-3 Pin FMA for Device Pins Open-Circuited
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
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
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
Table 4-5 Pin FMA for Device Pins Short-Circuited to Supply
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