33797 datasheet(10/34 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33797

ELECTRICAL CHARACTERISTICS

STATIC ELECTRICAL CHARACTERISTICS

Voltage Threshold for SQB_LO or SQB_HI Shorted to Ground with an Open

Squib using $C3 Command

RSQUIB = Open

VTHSG_SO

1.3

1.8

2.0

DIAGNOSTICS FOR SQUIB CONTINUITY BETWEEN SENSE_XX AND SQB_LO_XX ($C2 COMMAND)

Current Threshold for SQUIB_LO_1A, 1B, 2A, and 2B Continuity Check for

Standard and Cross-coupled Conditions ($C2) SQUIB_LO_XXCONT (15)

7.0 V

≤ V

VDIAG_X ≤ 35 V

ITHSQB CON

150

–

350

DIAGNOSTICS FOR SQUIB SHORT BETWEEN FIRING LOOPS ($E0–$E3, $E8 COMMANDS)

Voltage Threshold for Standard Squib Connection

7.0 V

≤ V

VDIAG_X ≤ 35 V

VTHSQBNOM

1.0

1.4

2.0

Voltage Threshold for SQUIB_X Shorted to SQUIB_Y (1 or More Shorted

Conditions)

Short Between Squib Lines (Loops) (SQUIB_XX_SSQB_YY) (16)

VTHSSQB

1.0

1.4

2.0

VDIAG SUPPLY DIAGNOSTICS ($C0 COMMAND)

VDIAG Supply Voltage High Threshold

VDHI

18.3

VDIAG Supply Voltage Low Threshold

VDLO

5.7

6.5

7.0

VFIRE SUPPLY DIAGNOSTICS VFIRE_1B AND VFIRE_2B ($C5 COMMAND)

VFIRE Supply Voltage High Threshold

VFDHI

18.3

VFIRE Supply Voltage Low Threshold

VFLO

5.7

6.5

7.0

VDIAG SUPPLY DIAGNOSTICS VDIAG_1 AND VDIAG_2 (ADDITIONAL VOLTAGE THRESHOLDS) ($C5 COMMAND)

VDIAG Supply Voltage Threshold 4

VVDIAG_X V4

30.2

32.8

36.2

VDIAG Supply Voltage Threshold 3

VVDIAG_X V3

25.5

27.7

30.2

VDIAG Supply Voltage Threshold 2

VVDIAG_X V2

20.5

22.6

25.5

VDIAG Supply Voltage Threshold 1

VVDIAG_X V1

18.4

20.5

VFIRE_RTN DIAGNOSTICS ($C9 COMMAND)

R_RTN1 Short-to-Ground Threshold (Open Ground Connection)

RRTN1

0.15

–

0.6

Ω

R_RTN2 Short-to-Ground Threshold (Open Ground Connection)

RRTN2

0.15

–

0.6

Ω

HIGH-SIDE SAFING SENSOR DIAGNOSTICS ($C0 COMMAND)

R_HS Valid Resistor Range

15 V

≤ V

VDIAG_X ≤ 35 V

RHS

4.1

5.1

6.1

Ω

R_HS Open Threshold

15 V

≤ V

VDIAG_X ≤ 35 V

RHSO

6.1

7.2

9.0

Ω

Notes

XX = 1A, 1B, 2A, or 2B

XX and YY = 1A, 1B, 2A, or 2B

Table 3. Static Electrical Characteristics (continued)

Characteristics noted under conditions 4.75 V ≤ VDD ≤ 5.25 V; 7.0 V ≤ VVFIRE_XX ≤ 35 V; VVDIAG_X = VVFIRE_XX; FEN 1 = FEN 2

= VDD; RR_LIMIT_X = 10 kΩ ±1%, RR_DIAG = 10 kΩ ±1%, -40°C ≤ TA ≤ +85°C, GND = 0 unless otherwise noted. Typical values

noted reflect the approximate parameter means at TA = 25°C under nominal conditions unless otherwise noted.

Characteristic

Symbol

Min

Typ

Max

Unit

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