L9659 datasheet(10/51 Pages) STMICROELECTRONICS

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Electrical specifications

L9659

10/51

Doc ID 022048 Rev 2

2.2

Absolute maximum degraded operating ratings

Under the following deviations to the ratings indicated in Section 2.3 the L9659 performance

will be degraded and not meet the electrical characteristics outlined in Section 2.4. At

minimum the SPI and diagnostics will function but not meet specified electrical parameters.

Note:

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

Under the above conditions the SPI will be 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 will provide power for squib resistance and HSS diagnostics

VDD will be 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

Supply voltage

4.5 to 5.5

VSDIAG

Supply voltage for squib diagnostics

7 to 40

VRES

VRES voltage (VRES0, VRES1, VRES2, VRES3, VRES4,

VRES5, VRES6, VRES7)

7 to 40

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

MOSI, FEN1, FEN2, FEN3, FEN4, IREF)

- 0.3 to (VDD +0.3)

Discrete output voltage (MISO, AOUT)

-0.3 to (VDD + 0.3)

Junction temperature

-40 to 150

°C

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, VRES4,

VRES5, VRES6, VRES7)

7 to 37

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

FEN1, FEN2, FEN3, FEN4, 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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