參數(shù)資料
型號(hào)： MCP2551
廠商： Microchip Technology Inc.
元件分類： CAN
英文描述： High-Speed CAN Transceiver
中文描述： 高速CAN收發(fā)器
文件頁數(shù)： 6/20頁
文件大?。?/td> 364K
代理商： MCP2551
MCP2551
DS21667C-page 6
Preliminary
2002 Microchip Technology Inc.
2.0
ELECTRICAL
CHARACTERISTICS
2.1
Terms and Definitions
A number of terms are defined in ISO-11898 that are
used to describe the electrical characteristics of a CAN
transceiver device. These terms and definitions are
summarized in this section.
2.1.1
BUS VOLTAGE
V
CANL
and V
CANH
, denoting the voltages of the bus line
wires, CANL and CANH, relative to ground of each
individual CAN node.
2.1.2
COMMON MODE BUS VOLTAGE
RANGE
Boundary voltage levels of V
CANL
and V
CANH
with
respect to ground, for which proper operation will occur,
if up to the maximum number of CAN nodes are
connected to the bus.
2.1.3
DIFFERENTIAL INTERNAL
CAPACITANCE, C
DIFF
(OF A CAN
NODE)
Capacitance seen between CANL and CANH during
the recessive state when the CAN node is
disconnected from the bus (see Figure 2-1).
2.1.4
DIFFERENTIAL INTERNAL
RESISTANCE, R
DIFF
(OF A CAN
NODE)
Resistance seen between CANL and CANH during the
recessive state when the CAN node is disconnected
from the bus (see Figure 2-1).
2.1.5
DIFFERENTIAL VOLTAGE, V
DIFF
(OF CAN BUS)
Differential voltage of the two-wire CAN bus, value
V
DIFF
= V
CANH
- V
CANL
.
2.1.6
INTERNAL CAPACITANCE, C
IN
(OF
A CAN NODE)
Capacitance seen between CANL (or CANH) and
ground during the recessive state when the CAN node
is disconnected from the bus (see Figure 2-1).
2.1.7
INTERNAL RESISTANCE, R
IN
(OF A
CAN NODE)
Resistance seen between CANL (or CANH) and
ground during the recessive state when the CAN node
is disconnected from the bus (see Figure 2-1).
FIGURE 2-1:
PHYSICAL LAYER
DEFINITIONS
R
IN
R
IN
R
DIFF
C
IN
C
IN
C
DIFF
CANL
CANH
GROUND
ECU
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