33797 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
33797 Datasheet PDF : 34 Pages
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ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
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
RST INPUT PIN (ACTIVE LOW) (11)
System Reset Threshold
VDDRST
–
–
4.1
V
Internal Current Pull-Down
IRST
-6
-10
-15
µA
RST Logic Low Level
VRST(LO)
0.0
2.5
0.35 x VDD V
RST Logic High Level
SQUIB DIAGNOSTICS ($D0–$D3 COMMANDS) (12)
VRST(HI)
0.65 x VDD
2.5
1.0 x VDD
V
Diagnostic Current Through Squib (13)
Resistance Threshold 1 (13)
Resistance Threshold 2 (13)
Resistance Threshold 3 (13)
Resistance Threshold 4 (13)
Resistance Threshold 5 (13)
Resistance Threshold 6 (13)
Resistance Threshold 7 (13)
Resistance Threshold 8 (13)
IDIAG
RTH1
RTH2
RTH3
RTH4
RTH5
RTH6
RTH7
RTH8
30
34
40.5
mA
1.2
1.4
1.6
Ω
1.6
1.8
2.1
Ω
2.1
2.4
2.6
Ω
2.6
2.9
3.2
Ω
3.3
3.7
4.4
Ω
4.6
5.4
6.0
Ω
5.7
6.5
7.1
Ω
6.7
7.8
8.5
Ω
SQUIB SHORT-TO-BATTERY / GROUND DIAGNOSTICS AND SQUIB HARNESS SHORT-TO-BATTERY / GROUND DIAGNOSTICS WITH
AN OPEN SQUIB ($C1, $C3 COMMANDS)
Voltage Threshold for SQB_LO and SQB_HI Shorted to VPWR
7.0 V ≤ VVDIAG_X ≤ 35 V
VTHSB
V
5.7
6.0
6.4
Voltage Threshold for SQB_LO and SQB_HI Shorted to Ground
7.0 V ≤ VVDIAG_X ≤ 35 V
Current Sink Shorts Measurements I_SQB_LO_XX (14)
1.0 V ≤ SENSE_XX ≤ 16 V, Typical = 800 µA
Current Source Shorts Measurements I_SQB_HI_XX (14)
1.0 V ≤ SENSE_XX ≤ 16 V, 7.0 V ≤ VVDIAG_X ≤ 35 V
VTHSG
ISINKSHRTS
ISOURSHRTS
1.3
-500
1.7
1.4
-800
3.5
V
1.6
µA
-900
mA
3.7
Voltage Threshold for SQB_LO or SQB_HI Shorted to VPWR with an Open VTHSB_SO
5.75
–
6.75
V
Squib using $C3 Command
RSQUIB = Open
Notes
11 Reset Bar range of operation: The minimum system reset bar threshold/active will be set to “0” for a value of VDD ≤ 4.1 V.
12 By changing the R_DIAG resistor value, the resistance thresholds can be varied in a linear relationship.The R_DIAG resistance can be
changed by ±10% to shift the thresholds by ±10%. Design goal for resistance threshold change is ±15%. R_DIAG threshold limit may
have to be changed to accommodate ±15% change. Example: Shifting the R_DIAG resistance value ±10%, the resistance threshold
will change by ±10%. Refer to Table 4, page 12.
13 RR_DIAG = 10 kΩ ±1.0%
14 XX = 1A, 1B, 2A, or 2B.
Analog Integrated Circuit Device Data
Freescale Semiconductor
33797
9
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