MC33797 查看數據表（PDF） - Freescale Semiconductor
零件编号
产品描述 (功能)
生产厂家
MC33797 Datasheet PDF : 32 Pages
| |||
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 TERMINAL (ACTIVE LOW) (12)
System Reset Threshold
Internal Current Pull-Down
RST Logic Low Level
RST Logic High Level
SQUIB DIAGNOSTICS ($D0–$D3 COMMANDS) (13)
Diagnostic Current Through Squib (14)
Resistance Threshold 1 (14)
Resistance Threshold 2 (14)
Resistance Threshold 3 (14)
Resistance Threshold 4 (14)
Resistance Threshold 5 (14)
Resistance Threshold 6 (14)
Resistance Threshold 7 (14)
Resistance Threshold 8 (14)
VDDRST
–
–
4.1
V
IRST
-6
-10
-15
µA
VRST(LO)
0.0
2.5
0.35 x VDD V
VRST(HI)
0.65 x VDD
2.5
1.0 x VDD
V
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
VTHSG
V
1.3
1.4
1.6
Current Sink Shorts Measurements I_SQB_LO_XX (15)
1.0 V ≤ SENSE_XX ≤ 16 V, Typical = 800 µA
ISINKSHRTS
-500
-800
µA
-900
Current Source Shorts Measurements I_SQB_HI_XX (15)
1.0 V ≤ SENSE_XX ≤ 16 V, 7.0 V ≤ VVDIAG_X ≤ 35 V
ISOURSHRTS
mA
1.7
3.5
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
12. 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.
13. 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 11.
14. RR_DIAG = 10 kΩ ±1.0%
15. XX = 1A, 1B, 2A, or 2B.
33797
8
Analog Integrated Circuit Device Data
Freescale Semiconductor
Share Link: 