MCZ33905BS3EK Freescale Semiconductor, MCZ33905BS3EK Datasheet - Page 57

• Manufacturer Part Number: MCZ33905BS3EK
• Description: IC SBC CAN HS 3.3V 32SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33905BS3EK

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

VBAT, and internal ECU 5.0 V. Several comparators are
implemented on CANH and CANL lines. These comparators
Table 8. Failure Detection Truth Table
Analog Integrated Circuit Device Data
Freescale Semiconductor
Failure Description
The device includes diagnostic of bus short-circuit to GND,
The following table indicates the state of the comparators when there is a bus failure, and depending upon the driver state.
CANH to VBAT
CANL to VBAT
CANH to GND
CANL to GND
No failure
No failure
CANH
SPLIT
CANL
connect
Standard termination
No
Lb (threshold V
Lg (threshold 1.75 V)
Figure 40. CAN Bus Simplified Structure Truth Table for Failure Detection
TXD
Diag
120
1
0
0
0
1
1
SUP
Logic
Driver Recessive State
-2.0 V)
Lg
Hg
ECU connector
Figure 39. Bus Termination Options
CAN BUS FAULT DIAGNOSTIC
L5
H5
Hb
Lb
CANH
SPLIT
CANL
Vrg
Vrg
CAN bus
Vrvb
Vr5
Hb (threshold V
Vr5
Vrvb
Hg (threshold 1.75 V)
V
60
60
DD
CANH
1
0
0
0
1
1
CANL
SUP
-2.0 V)
monitor the bus level in the recessive and dominant states.
The information is then managed by a logic circuitry to
properly determine the failure and report it.
CANH dominant level (3.6 V)
CANL dominant level (1.4 V)
CANH
ECU connector
SPLIT
CANL
Lb (threshold V
Recessive level (2.5 V)
CAN bus
Lg (threshold 1.75 V)
V RVB (V SUP -2.0 V)
V R5 (V DD -.43 V)
V BAT (12-14 V)
connect
V RG (1.75 V)
No termination
GND (0.0 V)
No
V DD (5.0 V)
0
0
0
0
1
0
SUP
Driver Dominant State
-2.0 V)
CAN BUS FAULT DIAGNOSTIC
Hb (threshold V
ECU connector
Hg (threshold 1.75 V)
CAN bus
CAN INTERFACE
1
1
0
0
1
1
SUP
-2.0 V)
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