SFFS302 October   2021 SN74LVC1G3157-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 DBV Package
    2. 2.2 DCK Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 SN74LVC1G3157-Q1 DBV and DCK Package

4.1 SN74LVC1G3157-Q1 DBV and DCK Package

Figure 4-1 and Figure 4-2 shows the SN74LVC1G3157-Q1 pin diagram for the DBV and DCK package. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the SN74LVC1G3157-Q1 data sheet.

Figure 4-1 Pin Diagram (DBV) Package
Figure 4-2 Pin Diagram (DCK) Package
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
B2 1 Corruption of analog signal on B2 pin. If there is no limiting resistor in the switch path device damage is possible. A
GND 2 No effect, normal operation. D
B1 3 Corruption of analog signal on B1 pin. If there is no limiting resistor in the switch path device damage is possible. A
A 4 Corruption of analog signal on A pin. If there is no limiting resistor in the switch path device damage is possible. A
VCC 5 Device unpowered. Device not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage is possible. A
S 6 S pin stuck to GND. Cannot control switch states. B
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of Potential Failure Effect(s) Failure Effect Class
B2 1 Corruption of analog signal on B2 pin. B
GND 2 Device unpowered. Device not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage is possible. A
B1 3 Corruption of analog signal on B1 pin. B
A 4 Corruption of analog signal on A pin. B
VCC 5 Device unpowered. Device not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage is possible. A
S 6 Loss of control on Select pin. Switch in undefined state. B
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin Name Pin No. Shorted to Description of Potential Failure Effect(s) Failure Effect Class
B2 1 GND Corruption of analog signal on B2 pin. If there is no limiting resistor in the switch path device damage is possible. A
GND 2 B1 Corruption of analog signal on B1 pin. If there is no limiting resistor in the switch path device damage is possible. A
B1 3 A Not considered corner pin. D
A 4 VCC Corruption of analog signal on A pin. If there is no limiting resistor in the switch path device damage is possible. A
VCC 5 S Select pin stuck high. Cannot control switch states. B
S 6 B2 Not considered corner pin. D
Table 4-5 Pin FMA for Device Pins Short-Circuited to VCC
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
B2 1 Corruption of analog signal on B2. If there is no limiting resistor in the switch path device damage is possible. A
GND 2 Device unpowered. Device not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage is possible. A
B1 3 Corruption of analog signal on B1. If there is no limiting resistor in the switch path device damage is possible. A
A 4 Corruption of analog signal on A. If there is no limiting resistor in the switch path device damage is possible. A
VCC 5 No effect, normal operation D
S 6 S pin stuck to VCC. Cannot control switch states. B