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

4.3 TMUX1309-Q1 TSSOP and SOT-23-THIN Package

Figure 4-1 and Figure 4-2 shows the TMUX1309-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 4-4 Pin Diagram (TSSOP) Package
Figure 4-5 Pin Diagram (SOT-23-THIN) Package
Table 4-10 Pin FMA for Device Pins Short-Circuited to Ground
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
S0B1Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S2B2Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.A
DB3Corruption of signal passed onto the SxB pins. If there is no limiting resistor in the switch path, then device damage is possible.A
S3B4Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S1B5Corruption of signal passed onto the DB 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
A19Address stuck low. Cannot control switch states.B
A010Address stuck low. Cannot control switch states.B
S3A11Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S0A12Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
DA13Corruption of signal passed onto the SxA pins. If there is no limiting resistor in the switch path, then device damage is possible.A
S1A14Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S2A15Corruption of signal passed onto the DA 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 4-11 Pin FMA for Device Pins Open-Circuited
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
S0B1Corruption of signal passed onto the DB pin. B
S2B2Corruption of signal passed onto the DB pin. B
DB3Corruption of signal passed onto the SxB pins. B
S3B4Corruption of signal passed onto the DB pin. B
S1B5Corruption of signal passed onto the DB 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 is unpowered. Device is not functional.

Observe that the absolute maximum ratings for all pins of the device are met, otherwise device damage is possible.

A

A19Control of the address pin is lost. Cannot control switch.B
A010Control of the address pin is lost. Cannot control switch.B
S3A11Corruption of signal passed onto the DA pin. B
S0A12Corruption of signal passed onto the DA pin. B
DA13Corruption of signal passed onto the SxA pin. B
S1A14Corruption of signal passed onto the DA pin. B
S2A15Corruption of signal passed onto the DA pin. B
VDD16Device is unpowered. Device is not functional. B
Table 4-12 Pin FMA for Device Pins Short-Circuited to Adjacent Pin
Pin NamePin No.Shorted toDescription of Potential Failure Effect(s)Failure Effect Class
S0B1S2BPossible corruption of signal passed onto the DB pin.B
S2B2DBPossible corruption of signal passed onto the SxB and DB pin. B
DB3S3BPossible corruption of signal passed onto the SxB and DB pin. B
S3B4S1BPossible corruption of signal passed onto the DB pin.B
S1B5ENPossible corruption of signal passed onto the DB 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
GND8A1Not considered, corner pin.D
A19A0Control of the switch state is lost.B
A010S3APossible corruption of signal passed onto the DA pin. Control of the switch state is lost.B
S3A11S0APossible corruption of signal passed onto the DA pin. B
S0A12DAPossible corruption of signal passed onto the SxA and DA pin. B
DA13S1APossible corruption of signal passed onto the SxA and DA pin. B
S1A14S2APossible corruption of signal passed onto the DA pin.B
S2A15VDDCorruption of signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.A
VDD16S0BNot considered, corner pin.D
Table 4-13 Pin FMA for Device Pins Short-Circuited to VDD
Pin NamePin No.Description of Potential Failure Effect(s)Failure Effect Class
S0B1Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S2B2Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.A
DB3Corruption of signal passed onto the SxB pins. If there is no limiting resistor in the switch path, then device damage is possible.A
S3B4Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S1B5Corruption of signal passed onto the DB 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
A19Address stuck high. Cannot control switch states.B
A010Address stuck high. Cannot control switch states.B
S3A11Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S0A12Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
DA13Corruption of signal passed onto the SxA pins. If there is no limiting resistor in the switch path, then device damage is possible.A
S1A14Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
S2A15Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.A
VDD16No effect, normal operation.D