L9660 datasheet(9/49 Pages) STMICROELECTRONICS

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L9660

Electrical specifications

2.2

Absolute maximum degraded operating ratings

Under the following deviations to the ratings indicated in Section 2.3 the L9660 performance

is degraded and not meeting the electrical characteristics outlined in Section 2.4. The SPI

and diagnostics still function but not meet specified electrical parameters.

Note:

The above is provided for informational purposes only and results in degraded operation.

Under the above conditions the SPI is functional as well as diagnostics, though the electrical

performance may not conform to the parameters outlined in Section 2.4. Firing requirements

as indicated in Section 2.4 may not be met with the conditions above.

2.3

Operating ratings

Comments:

VSDIAG supply provides power for squib resistance and HSS diagnostics

VDD is used for all internal functions as well as short to battery/ground and high squib

resistance diagnostics.

Table 4. Absolute maximum degraded operating ratings

Symbol

Parameter

Value

Unit

VDD

(1)

Supply voltage

4.5 to 5.5

VSDIAG

Supply voltage for squib diagnostics

7 to 40

VRES

VRES voltage (VRES0, VRES1, VRES2, VRES3)

7 to 40

Discrete input voltage (RESETB, DEPEN, CS_D, SCLK,

MOSI, FEN1, FEN2, IREF)

- 0.3 to (VDD +0.3)

Discrete output voltage (MISO, AOUT)

-0.3 to (VDD + 0.3)

Junction temperature

-40 to 150

°C

Exceeding a VDD of 5.1V during a deployment may cause damage.

Table 5. Operating ratings

Symbol

Parameter

Value

Unit

VDD

Supply voltage

4.9 to 5.1

VSDIAG

Supply voltage for squib diagnostics

7 to 37

VRESx

VRES voltage (VRES0, VRES1, VRES2, VRES3,)

7 to 37

Discrete input voltage (RESETB, CS_D, SCLK, MOSI,

FEN1, FEN2, IREF)

- 0.3 to (VDD +0.3)

Discrete output voltage (MISO, AOUT)

-0.3 to (VDD + 0.3)

Tamb

Ambient temperature

-40 to 95

°C

RTh j-amb

Thermal resistance junction to ambient (on FR-4 board)

°C/W

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