TH8056KDCA MELEXIS [Melexis Microelectronic Systems], TH8056KDCA Datasheet - Page 8

• Manufacturer Part Number: TH8056KDCA
• Description: Enhanced Single Wire CAN Transceiver
• Manufacturer: MELEXIS [Melexis Microelectronic Systems]

[1]
[2]
[3]
[4]
[5]
[6]
2.5 Bus loading requirements
Number of system nodes
Network distance between any two ECU nodes
Node Series Inductor Resistance (if required)
Ground Offset Voltage
Ground Offset Voltage, low battery
Device Capacitance (unit load)
Network Total Capacitance
Device Resistance (unit load)
Device Resistance (min load)
Network Total Resistance
High-Speed Mode Network Resistance to GND
Network Time Constant
Network Time Constant, high-speed mode
[1]
maximum value is selected to ensure proper communication under all communication modes. Not all combinations of R and C are
possible. The following load conditions are used for the measurement of the dynamic characteristics:
TH8056 – Datasheet
3901008056
min.load/min tau
min.load/max tau
max.load/min tau
max.load/max tau 200Ω/ 20nF
The network time constant incorporates the bus wiring capacitance. The minimum value is selected to limit radiated emissions. The
Normal and high volt. Wake-up mode
The maximum signal delay time for a bus rising edge is measured from V
level on CANH at maximum network time constant , minimum signal delay time for a bus rising edge is measured from V
on the TxD input pin to 1V on CANH at minimum network time constant .These definitions are valid in both normal and HVWU
mode
The maximum signal delay time for a bus rising edge in HVWU mode is measured from V
V
measured from V
Maximum signal delay time for a bus falling edge is measured from V
network time constant, minimum signal delay time for a bus falling edge is measured from V
V
The signal delay time in high-speed mode for a bus rising edge is measured from V
off
The signal delay time in high-speed mode for a bus falling edge is measured from V
at maximum high-speed network time constant
Receive delay time is measured from the rising / falling edge crossing of the nominal Vih value on CANH to the falling
(Vcmos_il_max) / rising (Vcmos_ih_min) edge of RxD. This parameter is tested by applying a square wave signal to CANH.
The minimum slew rate for the bus rising and falling edges is 50V/us. The low level on bus is always 0V. For normal mode
and high-speed mode testing the high level on bus is 4V. For HVWU mode testing the high level on bus is Vbat – 2V.
ihWUMax
ihMax
max level on CANH at maximum high-speed network time constant.
+ V
+ V
g off
Parameter
3.3KΩ/ 540pF
3.3KΩ/ 1.2nF
200Ω/ 5nF
g off
max level on CANH. These definitions are valid in both normal and HVWU mode.
[1]
max level on CANH at maximum network time constant, minimum signal delay time for a bus rising edge is
cmos ih
on the TxD input pin to 1V on CANH at minimum network time constant
[1]
Additional 140Ω tool resistance to
ground in parallel
Additional 120Ω tool resistance to
ground in parallel
Bus length
High-speed mode
Symbol
V
R
R
V
R
C
R
C
R
gofflb
Page 8 of 26
τ
τ
goff
load
min
ind
ul
ul
tl
tl
Enhanced Single Wire CAN Transceiver
6435
2000
Min
135
396
200
75
2
1
cmos ih
cmos il
on the TxD input pin to 1V on CANH at maximum
0.1 V
on the TxD input pin to the V
6490
Typ
150
cmos il
cmos ih
BAT
on the TxD input pin to the V
on the TxD input pin to 1V on CANH
cmos il
cmos ih
19000
TH8056
6665
3332
on the TxD input pin to the
Max
300
135
on the TxD input pin to the
3.5
1.3
0.6
1.5
60
32
4
ihMax
March 2007
+ V
Ohm
Ohm
Ohm
Ohm
Ohm
Unit
ihMax
pF
pF
µs
µs
Rev 012
M
V
V
g off
cmos ih
+ V
max
g