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

4.4 TMUX1309-Q1 WQFN Package

The figure below shows the TMUX1309-Q1 pin diagram for the WQFN 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 4-6 Pin Diagram for TMUX1309-Q1 in WQFN Package
Table 4-14 Pin FMA for Device Pins Short-Circuited to Ground

Pin Name

Pin No.

Description of Potential Failure Effect(s)

Failure Effect Class

S0B

1

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S2B

2

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

DB

3

Corruption of signal passed onto the SxB pins. If there is no limiting resistor in the switch path, then device damage is possible.

A

S3B

4

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S1B

5

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

EN

6

EN stuck low. Can no longer disable the device without power down.

B

N.C.

7

No effect, unconnected pin.

D

GND

8

No effect, normal operation.

D

A1

9

Address stuck low. Cannot control switch states.

B

A0

10

Address stuck low. Cannot control switch states.

B

S3A

11

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S0A

12

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

DA

13

Corruption of signal passed onto the SxA pins. If there is no limiting resistor in the switch path, then device damage is possible.

A

S1A

14

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S2A

15

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

VDD

16

Device 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

Thermal pad

—

No effect, normal operation.

D
Table 4-15 Pin FMA for Device Pins Open-Circuited

Pin Name

Pin No.

Description of potential failure effect(s)

Failure effect class

S0B

1

Corruption of signal passed onto the DB pin.

B

S2B

2

Corruption of signal passed onto the DB pin.

B

DB

3

Corruption of signal passed onto the SxB pins.

B

S3B

4

Corruption of signal passed onto the DB pin.

B

S1B

5

Corruption of signal passed onto the DB pin.

B

EN

6

Loss of control of EN pin. Cannot disable switch. Will default to switches disabled.

B

N.C.

7

No effect, unconnected pin.

D

GND

8

Device 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

A1

9

Loss of control of address pin. Cannot control switch.

B

A0

10

Loss of control of address pin. Cannot control switch.

B

S3A

11

Corruption of signal passed onto the DA pin.

B

S0A

12

Corruption of signal passed onto the DA pin.

B

DA

13

Corruption of signal passed onto the SxA pin.

B

S1A

14

Corruption of signal passed onto the DA pin.

B

S2A

15

Corruption of signal passed onto the DA pin.

B

VDD

16

Device is unpowered. Device is not functional.

B

Thermal pad

—

No effect, normal operation.

D
Table 4-16 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

S0B

1

S2B

Possible corruption of signal passed onto the DB pin.

B

S2B

2

DB

Possible corruption of signal passed onto the SxB and DB pin.

B

DB

3

S3B

Possible corruption of signal passed onto the SxB and DB pin.

B

S3B

4

S1B

Possible corruption of signal passed onto the DB pin.

B

S1B

5

EN

Possible corruption of signal passed onto the DB pin. Switch state will be undefined.

B

EN

6

N.C.

No connect pin electrically floating, no effect.

D

N.C.

7

GND

No connect pin electrically floating, no effect.

D

GND

8

A1

Not considered, corner pin.

D

A1

9

A0

Control of switch state is lost.

B

A0

10

S3A

Possible corruption of signal passed onto the DA pin. Control of switch state is lost.

B

S3A

11

S0A

Possible corruption of signal passed onto the DA pin.

B

S0A

12

DA

Possible corruption of signal passed onto the SxA and DA pin.

B

DA

13

S1A

Possible corruption of signal passed onto the SxA and DA pin.

B

S1A

14

S2A

Possible corruption of signal passed onto the DA pin.

B

S2A

15

VDD

Corruption of signal passed onto the D pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

VDD

16

S0B

Not considered, corner pin.

D
Table 4-17 Pin FMA for Device Pins Short-Circuited to VDD

Pin Name

Pin No.

Description of potential failure effect(s)

Failure effect class

S0B

1

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S2B

2

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

DB

3

Corruption of signal passed onto the SxB pins. If there is no limiting resistor in the switch path, then device damage is possible.

A

S3B

4

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S1B

5

Corruption of signal passed onto the DB pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

EN

6

EN stuck high. Can no longer enable the device.

B

N.C.

7

No effect, unconnected pin.

D

GND

8

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

A1

9

Address stuck high. Cannot control switch states.

B

A0

10

Address stuck high. Cannot control switch states.

B

S3A

11

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S0A

12

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

DA

13

Corruption of signal passed onto the SxA pins. If there is no limiting resistor in the switch path, then device damage is possible.

A

S1A

14

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

S2A

15

Corruption of signal passed onto the DA pin. If there is no limiting resistor in the switch path, then device damage is possible.

A

VDD

16

No effect, normal operation.

D

Thermal pad

—

No connect pin electrically floating, no effect.

D