MC33388D Freescale, MC33388D Datasheet - Page 12

• Manufacturer Part Number: MC33388D
• Manufacturer: Freescale

Specifications of MC33388D

• Number Of Transceivers: 1
• Power Down Mode: Sleep/Standby
• Operating Supply Voltage (max): 5.25/27V
• Operating Supply Voltage (typ): 5/9/12/15/18/24V
• Package Type: SOIC N
• Operating Temperature (max): 125C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 14
• Lead Free Status / RoHS Status: Compliant

MC33388
MC33388 capabilities are utilized: CAN interface, normal
and low power modes, wake up source from CAN bus or
wake up switch.
voltage regulator having an inhibit input pin. In addition to TX
and RX connections to the microcontroller CAN module, the
MC33388 requires 3 additional connections to a standard
microcontroller I/O port for EN, STB and NERR pins.
switch. MC33388 allows the signal switch configuration to be
either connected to Vbat or to ground through pull up or pull
down resistor. Solution with switch to GND is indicated as
option in the application schematic. A resistor must be
inserted in series with wake pin in order to limit the input
current during positive and negative transient pulses.
MC33388 VBAT and VDD lines. Those capacitors might be
shared with other devices from the same printed circuit
board, depending on its configuration.
proper operation, they must have identical value (R1 equals
Figure 4 above is the typical application schematic. All
The MC33388 VDD is supplied through an external
MC33388 wake pin is connected to an external signal
De-coupling capacitors are recommended on the
R1 and R2 are the network termination resistors. For
MCU
MODULE
Vdd
Vss
CAN
Port
I/O
MCU
Archived by Freescale Semiconductor, Inc., 2008
MODULE
C1
Vss
Vdd
C2
CAN
5V
IC1
5V
BATTERY
C2
C1
12V
NERR
TX
RX
INH
VDD
EN
STB
MC33388D
Figure 4. Minimum Application Schematic
C4
Table 4 • Typical Application Schematic
VBAT
NERR
TX
RX
INH
VDD
EN
STB
MC33388D
D1
C4
BATTERY
C3
CANH
WAKE
CANL
APPLICATION
GND
RTH
RTL
VBAT
MOTOROLA
Switch
R4
D1
C3
CANH
WAKE
CANL
GND
RTH
RTL
R1
R2
to R2). Their value is determined by the total network
termination resistor and the number of nodes.
higher than 100Ω. If a 500Ω termination resistor is chosen,
with a system composed of 32 nodes, each R1 or R2 will be
16kΩ. In addition, R1 and R2 values should be chosen
between 500Ω and 16kΩ at each node.
CAN bus. A serial common mode inductance can be inserted
in
performances both in emission and susceptibility.
Minimum Application Configuration
minimum application schematic figure 5 below. The device is
used as CAN transceiver only and other features are not used.
The device EN and STB input pins must be connected to 5V in
order to set the device in normal mode. INH and NERR can be
left open.
connected to a known state, i.e GND.
R3
The total network termination resistor value must be
The CANH and CANL pin can be directly connected to the
The minimum device configuration is described in
CAUTION: WAKE should not be left open and must be
order
CAN BUS
L1
R1
R2
CAN BUS
to
improve
Component information:
C1>= 47nF
C2>= 4.7uF
C3>= 47nF
C4>= 10uF
D1: 1N4148
R1=R2=R (500Ω<R<16kΩ)
R / number of nodes>100Ω
Component information:
R3: 10kΩ
R4: >= 33kΩ
C1>= 47nF
C2>= 4.7uF
C3>= 47nF
C4>= 10uF
L1: optional common mode choke
D1: 1N4148
IC1: LM2935
R1=R2=R (500Ω<R<16kΩ)
R/number of nodes>100Ω
option with switch to gnd
R4
electromagnetic
BATTERY
R3
Switch
compatibility
12