MC33199 Datasheet, PDF (8/18 Pages) Freescale Semiconductor, Inc – Automotive ISO 9141 Serial Link Driver

ELECTRICAL CHARACTERISTICS
TIMING DIAGRAMS
TIMING DIAGRAMS
Input
Signal
+5V +12V
VCC VBAT
I1
REF-OUT
REF-IN-L
REF-IN-K
DIA
TxD
GND
Test
Point
1nF
5V
0V
tBIT
tDDR
10V
DIA Output
Signal
Figure 4. TXD to DIA AC Characteristic
TXD Input
Signal
tDDF
2V
2K
Test
Points
2x30pF
+5V +12V
VCC VBAT
REF-OUT
REF-IN-L _L
REF-IN-K
TXD
DIA
LO
RXD
GND
Input
Signal
12V
tBIT
0V
tRDR / tLDR
RXD ot LO ^4.5V
Output
Signal
DIA and L
Input Signal
tRDF / tLDF
0.4V
Figure 5. DIA to TxD and L to LO AC Characteristics
.
TXD Signal
120mA
tBIT
tI1F
tI1H
5V
0V
Typical I1
Waveform
Current Source I1
Maximum Limit
40mA
4mA
2mA
tI1R
Current Source I1
Minimum Limit
Figure 6. Current Source I1 AC Characteristics
At static HIGH or LOW level TXD, the current source I1 delivers a current of 3mA (typ). Only during LOW to HIGH transition,
does this current increase to a higher value in order to charge the K Line capacitor (Cl<4nF) in a short time.
33199
8
Analog Integrated Circuit Device Data
Freescale Semiconductor