SLCA004 February 2023 LM2901 , LM2901AV , LM2901B , LM2901V
1.4 Pin Failure Mode Analysis (Pin FMA)
This section provides a Failure Mode Analysis (FMA) for the pins of the LM2901, LM2901B, LM2901V, LM2901AV. The failure modes covered in this document include the typical pin-by-pin failure scenarios:
- Pin short-circuited to Ground (see Table 1-5)
- Pin open-circuited (see Table 1-6)
- Pin short-circuited to an adjacent pin (see Table 1-7)
- Pin short-circuited to supply (see Table 1-8)
Table 1-5 through Table 1-8 also indicate how these pin conditions can affect the device as per the failure effects classification in Table 1-4.
| Class | Failure Effects |
|---|---|
| A | Potential device damage that affects functionality |
| B | No device damage, but loss of functionality |
| C | No device damage, but performance degradation |
| D | No device damage, no impact to functionality or performance |
Figure 1-2 shows the LM2901-Q1, LM2901B-Q1, LM2901V-Q1, LM2901AV-Q1 pin diagram. For a detailed description of the device pins please refer to the 'Pin Configuration and Functions' section in the data sheet.
Figure 1-2 Pin Diagram| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
|
1OUT |
1 |
No change if GND pin is GND node | B |
|
2OUT |
2 |
No change if GND pin is GND node | B |
|
VCC |
3 |
Main supply shorted out (no power to device) | B |
|
2IN- |
4 |
Output goes high, if other input is positive | B |
|
2IN+ |
5 |
Output goes low, if other input is positive | B |
|
1IN- |
6 |
Output goes high, if other input is positive | B |
|
1IN+ |
7 |
Output goes low, if other input is positive | B |
|
3IN- |
8 |
Output goes high, if other input is positive | B |
|
3IN+ |
9 |
Output goes low, if other input is positive | B |
|
4IN- |
10 |
Output goes high, if other input is positive | B |
|
4IN+ |
11 |
Output goes low, if other input is positive | B |
|
GND |
12 |
No change if same node as GND | D |
|
4OUT |
13 |
No change if GND pin is GND node | B |
|
3OUT |
14 |
No change if GND pin is GND node | B |
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
|
1OUT |
1 |
Output can't drive application load | B |
|
2OUT |
2 |
Output can't drive application load | B |
|
VCC |
3 |
Main supply open (no power to device) | B |
|
2IN- |
4 |
Output may be low or high | B |
|
2IN+ |
5 |
Output may be low or high | B |
|
1IN- |
6 |
Output may be low or high | B |
|
1IN+ |
7 |
Output may be low or high | B |
|
3IN- |
8 |
Output may be low or high | B |
|
3IN+ |
9 |
Output may be low or high | B |
|
4IN- |
10 |
Output may be low or high | B |
|
4IN+ |
11 |
Output may be low or high | B |
|
GND |
12 |
Lowest voltage pin will drive GND pin internally (via diode) | A |
|
4OUT |
13 |
Output can't drive application load | B |
|
3OUT |
14 |
Output can't drive application load | B |
| Pin Name | Pin No. | Shorted to | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|---|
|
1OUT |
1 |
2OUT |
Output may be low or high | B |
|
2OUT |
2 |
VCC |
Thermal stress due to high power dissipation | A |
|
VCC |
3 |
2IN- |
Output goes low, if other input is less positive | B |
|
2IN- |
4 |
2IN+ |
Output may be low or high | B |
|
2IN+ |
5 |
1IN- |
Output may be low or high | B |
|
1IN- |
6 |
1IN+ |
Output may be low or high | B |
|
1IN+ |
7 |
3IN- |
Output may be low or high | B |
|
3IN- |
8 |
3IN+ |
Output may be low or high | B |
|
3IN+ |
9 |
4IN- |
Output may be low or high | B |
|
4IN- |
10 |
4IN+ |
Output may be low or high | B |
|
4IN+ |
11 |
GND |
Output goes low, if other input is positive | B |
|
GND |
12 |
4OUT |
No change if GND pin is GND node | B |
|
4OUT |
13 |
3OUT |
Output may be low or high | B |
|
3OUT |
14 |
1OUT |
Output may be low or high | B |
| Pin Name | Pin No. | Description of Potential Failure Effect(s) | Failure Effect Class |
|---|---|---|---|
|
1OUT |
1 |
Thermal stress due to high power dissipation | A |
|
2OUT |
2 |
Thermal stress due to high power dissipation | A |
|
VCC |
3 |
No change if same node as VCC | D |
|
2IN- |
4 |
Output goes low, if other input is less positive | B |
|
2IN+ |
5 |
Output goes high, if other input is less positive | B |
|
1IN- |
6 |
Output goes low, if other input is less positive | B |
|
1IN+ |
7 |
Output goes high, if other input is less positive | B |
|
3IN- |
8 |
Output goes low, if other input is less positive | B |
|
3IN+ |
9 |
Output goes high, if other input is less positive | B |
|
4IN- |
10 |
Output goes low, if other input is less positive | B |
|
4IN+ |
11 |
Output goes high, if other input is less positive | B |
|
GND |
12 |
Main supply shorted out (no power to device) | B |
|
4OUT |
13 |
Thermal stress due to high power dissipation | A |
|
3OUT |
14 |
Thermal stress due to high power dissipation | A |