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L9679P Datasheet(PDF) 252 Page - STMicroelectronics

No. de pieza L9679P
Descripción Electrónicos  Automotive advanced airbag IC for mid/high end applications
PDF  272 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 252 Page - STMicroelectronics

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Electrical characteristics
L9679P
252/272
DocID029275 Rev 1
17
VSYNCDROP
Sync drop-out voltage
VSYNCBOOST - VRSUx
1-
-
V
18
ILIM_SYNC_LS
Sync pulse current limit
(LS driver)
-
50
-
80
mA
19
ILIM_SYNC
Static current limitation for
each transceiver output
RSUx
During sync
pulse generator VRSUx=GND
-240
-
-120
mA
20
C1
Capacitor on RSUx
Regulator
22 nF nominal
Design Info
13
-
-
nF
21
RE2
RSU damping resistance
Design info
-
2.5
-
Ω
22
C2
ECU pin capacitance
5 nF nominal
Design Information, not tested
4-
6
nF
23
-
Total number of sensors
connected to bus
Design info
1
-
3
-
Table 61. PSI-5 satellite transceiver - DC specifications (continued)
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
Table 62. PSI-5 satellite transceiver - AC specifications
No
Symbol
Parameter
Conditions
Min
Typ
Max
Unit
1TBit_125k
Bit time (125kbps
mode)
At the sensor connector
7.6
8
8.4
μs
2TBit_189k
Bit time (189kbps
mode)
At the sensor connector
5
5.3
5.6
μs
3TFLT_OCTH_PSI5
Over Current
Detection deglitch
filter time
Normal operation
500
-
600
μs
4
TBLK_OCTH_PSI5
Over Current
Detection
Blanking Time
At interface power on (BLKTxSEL = 0)
4.6
-
5.4
ms
5
At interface power on (BLKTxSEL = 1)
9.4
-
10.8
ms
6TSTBTH
Reverse Battery
Blocking Enable
Time
-12
-
16
μs
7t0
Reference time
@0.5 V on top of V(RSUx)
-
0
-
-
8t1
Start delay time
From t0 to SATSYNC
-3
-
-
μs
9t2
Sync signal
sustain start
@ VRSU+3.8 V relative to t0
--
7
μs
10
SRRISE_RSU
Sync slope rising
slew rate
0.43
-
1.5
V/μs
11
SRFALL_RSU
Sync slope falling
slew rate
-1.5
-
-
V/μs
12
t3
Sync signal
sustain time
Design Info
16
-
-
μs
13
t4
Discharge time
limit
Design Info
-
-
35
μs



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