SCDA023B April   2020  – January 2022 TMUX1308-Q1 , TMUX1309-Q1

 

  1.   Trademarks
  2. 1Overview
  3. 2Functional Safety Failure In Time (FIT) Rates
    1. 2.1 TSSOP, SOT-23-THIN, and WQFN Packages
  4. 3Failure Mode Distribution (FMD)
  5. 4Pin Failure Mode Analysis (Pin FMA)
    1. 4.1 TMUX1308-Q1 TSSOP and SOT-23-THIN Package
    2. 4.2 TMUX1308-Q1 WQFN Package
    3. 4.3 TMUX1309-Q1 TSSOP and SOT-23-THIN Package
    4. 4.4 TMUX1309-Q1 WQFN Package
  6. 5Revision History

4.1 TMUX1308-Q1 TSSOP and SOT-23-THIN Package

Figure 4-1 and Figure 4-2 shows the TMUX1308-Q1 pin diagram for the TSSOP and SOT-23-THIN package. For a detailed description of the device pins please refer to the Pin Configuration and Functions section in the TMUX1308-Q1 and TMUX1309-Q1 data sheet.

Figure 4-1 Pin Diagram (TSSOP) Package
Figure 4-2 Pin Diagram (SOT-23-THIN) Package
Table 4-2 Pin FMA for Device Pins Short-Circuited to Ground
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
S41Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S62Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
D3Corruption of the signal passed onto the S pins. If there is no limiting resistor in the switch path, then device damage is possible.A
S74Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S55Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
EN6EN stuck low. Can no longer disable

the device without power down

B
N.C.7No effect, unconnected pin.D
GND8No effect, normal operation.D
A29Address stuck low. Cannot control switch states.B
A110Address stuck low. Cannot control switch states.B
A011Address stuck low. Cannot control switch states.B
S312Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S013Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S114Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S215Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
VDD16Device 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
Table 4-3 Pin FMA for Device Pins Open-Circuited
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
S41Corruption of the signal passed onto the D pin.B
S62Corruption of the signal passed onto the D pin.B
D3Corruption of the signal passed onto the S pins.B
S74Corruption of the signal passed onto the D pin.B
S55Corruption of the signal passed onto the D pin.B
EN6Control of the EN pin is lost. Cannot disable switch. Will default to switches disabled.B
N.C.7No effect, unconnected pin.

D

GND8Device unpowered. Device not functional. Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage is possible.

A

A29Control of the address pin is lost. Cannot control switch.B
A110Control of the address pin is lost. Cannot control switch.B
A011Control of the address pin is lost. Cannot control switch.B
S312Corruption of the signal passed onto the D pin.B
S013Corruption of the signal passed onto the D pin.B
S114Corruption of the signal passed onto the D pin.B
S215Corruption of the signal passed onto the D pin.B
VDD16Device is unpowered. Device is not functional.B
Table 4-4 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin NamePin No.Shorted toDescription of Potential Failure Effect(s)Failure Effect Class
S41S6Possible corruption of the signal passed onto the D pin.B
S62DPossible corruption of the signal passed onto the SX and D pin.B
D3S7Possible corruption of the signal passed onto the SX and D pin.B
S74S5Possible corruption of the signal passed onto the D pin.B
S55ENPossible corruption of the signal passed onto the D pin. Switch state will be undefined.B
EN6N.C.No connect pin electrically floating, no effect.D
N.C.7GNDNo connect pin electrically floating, no effect.D
GND8A2Not considered, corner pin.D
A29A1Control of the switch state is lost.B
A110A0Control of the switch state is lost.B
A011S3Possible corruption of the signal passed onto the D pin. Control of the switch state is lost.B
S312S0Possible corruption of the signal passed onto the D pin.B
S013S1Possible corruption of the signal passed onto the D pin.B
S114S2Possible corruption of the signal passed onto the D pin.B
S215VDDCorruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
VDD16S4Not considered, corner pin.D
Table 4-5 Pin FMA for Device Pins Short-Circuited to VDD
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
S41Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S62Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
D3Corruption of the signal passed onto the S pins. If there is no limiting resistor in the switch path, then device damage is possible.A
S74Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S55Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
EN6EN stuck high. Can no longer enable the device.B
N.C.7No effect, unconnected pin.D
GND8Device 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
A29Address stuck high. Cannot control switch states.B
A110Address stuck high. Cannot control switch states.B
A011Address stuck high. Cannot control switch states.B
S312Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S013Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S114Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S215Corruption of the signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
VDD16No effect, normal operation.D