MCP2551 Microchip Technology, MCP2551 Datasheet - Page 6

• Manufacturer Part Number: MCP2551
• Description: High-Speed CAN Transceiver
• Manufacturer: Microchip Technology

MCP2551
2.0
2.1
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
V
wires, CANL and CANH, relative to ground of each
individual CAN node.
2.1.2
Boundary voltage levels of V
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
Capacitance seen between CANL and CANH during
the
disconnected from the bus (see Figure 2-1).
2.1.4
Resistance seen between CANL and CANH during the
recessive state when the CAN node is disconnected
from the bus (see Figure 2-1).
DS21667C-page 6
CANL
recessive
and V
ELECTRICAL
CHARACTERISTICS
Terms and Definitions
BUS VOLTAGE
COMMON MODE BUS VOLTAGE
RANGE
DIFFERENTIAL INTERNAL
CAPACITANCE, C
NODE)
DIFFERENTIAL INTERNAL
RESISTANCE, R
NODE)
CANH
state
, denoting the voltages of the bus line
when
DIFF
CANL
the
DIFF
(OF A CAN
and V
(OF A CAN
CAN
CANH
node
with
Preliminary
is
2.1.5
Differential voltage of the two-wire CAN bus, value
V
2.1.6
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
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:
DIFF
= V
CANH
R
R
DIFFERENTIAL VOLTAGE, V
(OF CAN BUS)
INTERNAL CAPACITANCE, C
A CAN NODE)
INTERNAL RESISTANCE, R
CAN NODE)
IN
IN
- V
CANL
ECU
C
R
PHYSICAL LAYER
DEFINITIONS
IN
.
DIFF
2002 Microchip Technology Inc.
C
IN
C
DIFF
CANH
GROUND
CANL
IN
DIFF
IN
(OF A
(OF