SCDA025 September   2022 TS3A27518E-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 TSSOP-24 Package
    2. 2.2 QFN-24 Package
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 TSSOP-24 Package
    2. 4.2 QFN-24 Package

4.2 QFN-24 Package

Figure 4-2 shows the TS3A27518E-Q1 pin diagram for the QFN-24 package. For a detailed description of the device pins, refer to the Pin Configuration and Functions section in the TS3A27518E-Q1 data sheet.

Figure 4-2 Pin Diagram (QFN-24 Package)
Table 4-6 Pin FMA for Device Pins Short-Circuited to Ground
Pin Name Pin No. Description of potential failure effect(s) Failure effect class
COM1 1 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
GND 2 No effect; normal operation. D
COM2 3 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM3 4 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
VCC 5 Device is unpowered. Device is not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage may be plausible. A
COM4 6 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM5 7 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO1 8 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM6 9 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO2 10 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
IN2 11 Address stuck low. Cannot control the switch states. B
NO3 12 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO6 13 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO4 14 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO5 15 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC5 16 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
/EN 17 EN stuck low. Can no longer disable the device. B
NC4 18 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC6 19 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC3 20 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
IN1 21 Address stuck low. Cannot control the switch states. B
NC2 22 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC1 23 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
N.C. 24 No effect; unconnected pin. D
Table 4-7 Pin FMA for Device Pins Open-Circuited
Pin Name Pin No. Description of potential failure effect(s) Failure effect class
COM1 1 Corruption of the signal passed onto the NO1/NC1 pins. B
GND 2 No effect; normal operation. B
COM2 3 Corruption of the signal passed onto the NO2/NC2 pins. B
COM3 4 Corruption of the signal passed onto the NO3/NC3 pins. B
VCC 5 Device is unpowered and not functional. B
COM4 6 Corruption of the signal passed onto the NO4/NC4 pins. B
COM5 7 Corruption of the signal passed onto the NO5/NC5 pins. B
NO1 8 Corruption of the signal passed onto the COM1 pin. B
COM6 9 Corruption of the signal passed onto the NO6/NC6 pins. B
NO2 10 Corruption of the signal passed onto the COM2 pin. B
IN2 11 Loss of control of the IN2 pin. Cannot control the switch. Unknown state can cause increase in the IDD current. B
NO3 12 Corruption of the signal passed onto the COM3 pin. B
NO6 13 Corruption of the signal passed onto the COM6 pin. B
NO4 14 Corruption of the signal passed onto the COM4 pin. B
NO5 15 Corruption of the signal passed onto the COM5 pin. B
NC5 16 Corruption of the signal passed onto the COM5 pin. B
/EN 17 Loss of control of the EN pin. Cannot disable the switch. Unknown state can cause increase in the IDD current. B
NC4 18 Corruption of the signal passed onto the COM4 pin. B
NC6 19 Corruption of the signal passed onto the COM6 pin. B
NC3 20 Corruption of the signal passed onto the COM3 pin. B
IN1 21 Loss of control of the IN2 pin. Cannot control the switch. Unknown state can cause an increase in the IDD current. B
NC2 22 Corruption of the signal passed onto the COM2 pin. B
NC1 23 Corruption of the signal passed onto the COM1 pin. B
N.C. 24 No effect; unconnected pin. B
Table 4-8 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
COM1 1 GND Corruption of the signal passed onto the NO1/NC1 pins. If there is no limiting resistor in the switch path, then device damage is possible. A
GND 2 COM2 Device functions, but the analog signal is corrupted. If there is no limiting resistor in the switch path, then device damage is possible. A
COM2 3 COM3 Possible corruption of the signal passed onto the NO/NC pins. B
COM3 4 VCC Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
VCC 5 COM4 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM4 6 COM5 Not considered; corner pin. D
COM5 7 NO1 Possible corruption of the signal passed onto the COM5 and NO1/NO5 pin. B
NO1 8 COM6 Possible corruption of the signal passed onto the NO1 and COM6/COM1 pin. B
COM6 9 NO2 Possible corruption of the signal passed onto the COM6 and NO2/NO6 pin. B
NO2 10 IN2 Possible corruption of the signal passed onto the COMx pins. Loss of control of the switch state. B
IN2 11 NO3 Possible corruption of the signal passed onto the COMx pins. Loss of control of the switch state. B
NO3 12 NO6 Not considered; corner pin. D
NO6 13 NO4 Possible corruption of the signal passed onto the COM pin. B
NO4 14 NO5 Possible corruption of the signal passed onto the COM pin. B
NO5 15 NC5 Possible corruption of the signal passed onto the COM pin. B
NC5 16 /EN Corruption of the signal passed onto the NC5 pin. Loss of control of the switch state. A
/EN 17 NC4 Corruption of the signal passed onto the NC4 pin. Loss of control of the switch state. A
NC4 18 NC6 Not considered; corner pin. D
NC6 19 NC3 Possible corruption of the signal passed onto the COM pin. B
NC3 20 IN1 Possible corruption of the signal passed onto the COMx pins. Loss of control of the switch state. B
IN1 21 NC2 Possible corruption of the signal passed onto the COMx pins. Loss of control of the switch state. B
NC2 22 NC1 Possible corruption of the signal passed onto the COM pin. B
NC1 23 N.C. Unconnected pin, electrically floating; no effect. D
N.C. 24 COM1 Not considered; corner pin. D
Table 4-9 Pin FMA for Device Pins Short-Circuited to VDD
Pin Name Pin No. Description of potential failure effect(s) Failure effect class
COM1 1 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
GND 2 Device is unpowered. Device is not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage may be plausible. A
COM2 3 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM3 4 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
VCC 5 No effect; normal operation. D
COM4 6 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM5 7 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO1 8 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
COM6 9 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO2 10 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
IN2 11 Address is stuck high. Cannot control the switch states. B
NO3 12 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO6 13 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO4 14 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NO5 15 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC5 16 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
/EN 17 EN stuck high. Can no longer enable the device. B
NC4 18 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC6 19 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC3 20 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
IN1 21 Address stuck high. Cannot control the switch states. B
NC2 22 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
NC1 23 Corruption of the analog signal. If there is no limiting resistor in the switch path, then device damage is possible. A
N.C. 24 No effect; unconnected pin. D