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L9679ETR Datasheet(PDF) 101 Page - STMicroelectronics

Part # L9679ETR
Description  Automotive battery cut-off circuit and airbag system expansion IC
PDF  127 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679ETR Datasheet(HTML) 101 Page - STMicroelectronics

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Table 26. SPI AC specifications
Symbol
Parameter
Comments / Conditions
Min
Typ
Max
Unit
FSCLK
SPI transfer frequency
-
-
8
8.08
MHz
tSCLK
SCLK_x period
-
123.8
-
-
ns
tLEAD
Enable lead time
-
250
-
ns
tLAG
Enable lag time
-
50
-
-
ns
tHIGH_SCLK
SCLK_x high time (5)
-
40
-
-
ns
tLOW_SCLK
SCLK_x low time
-
40
-
-
ns
tSETUP_MOSI
MOSI_x input setup time
-
20
-
-
ns
tHOLD_MOSI
MOSI_x input hold time
-
20
-
-
ns
tACC_MISO
MISO_x access time
80 pF load
-
-
60
ns
tDIS_MISO
MISO_x disable time
80 pF load
-
-
100
ns
tVALID_MISO
MISO_x output valid time
80 pF load
-
-
30
ns
tHOLD_MISO
MISO_x output hold time
80 pF load
Design info
0
-
-
ns
tNODATA
SCLK_x hold time
-
20
-
-
ns
tFLT_CS
CS_x noise glitch rejection time
-
50
-
300
ns
tNODATA
SPI Iinterframe time
-
400
-
-
ns
Note:
All timings are shown with respect to 10% and 90% of the actual delivered VCC voltage.
Figure 28. SPI timing diagram
tHIGH_SCLK
CS _ x
SCLK _ x
tLEAD
tACC_MISO
tSETUP_MOSI tHOLD_MISO
tLOW_SCLK
tVALID_MISO
tSCLK
MSB OUT
tLAG
tNODATA
tNODATA
tHOLD_MISO
tDIS_MISO
LSB IN
DATA
DATA
LSB OUT
DON’T
CARE
MSB IN
MISO _ x
MOSI _ x
GADG1203181209PS
L9679E
Electrical characteristics
DS12485 - Rev 8
page 101/127



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