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参数资料
| 型号： | MC33388 |
| 厂商： | 飞思卡尔半导体(中国)有限公司 |
| 英文描述： | Fault Tolerant CAN Interface(容错CAN接口) |
| 中文描述： | 容错CAN接口（容错的CAN接口） |
| 文件页数： | 12/28页 |
| 文件大小： | 583K |
| 代理商： | MC33388 |
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MC33388
APPLICATION
MC33388
12
Table 4 Typical Application Schematic
I/O
WAKE
BATTERY
VBAT
INH
VDD
C1
STB
NERR
TX
RX
GND
RTH
CANH
CANL
RTL
CAN
MODULE
MCU
EN
C2
R2
R1
Vdd
C4
C3
R4
R3
Switch
L1
CAN BUS
D1
12V
5V
Vss
R3
Switch
R4
BATTERY
option with switch to gnd
IC1
MC33388D
Component information:
R3: 10k
R4: >= 33k
C1>= 47nF
C2>= 4.7uF
C3>= 47nF
C4>= 10uF
L1: optional common mode choke
D1: 1N4148
IC1: LM2935
R1=R2=R (500
<R<16k
)
R/number of nodes>100
Figure 4 above is the typical application schematic. All
MC33388 capabilities are utilized : CAN interface, normal
and low power modes, wake up source from CAN bus or
wake up switch.
The MC33388 VDD is supplied through an external
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.
MC33388 wake pin is connected to an external signal
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.
De-coupling capacitors are recommended on the
MC33388 VBAT and VDD lines. Those capacitors might be
shared with other devices from the same printed circuit
board, depending on its configuration.
R1 and R2 are the network termination resistors. For
proper operation, they must have identical value (R1 equals
to R2). Their value is determined by the total network
termination resistor and the number of nodes.
The total network termination resistor value must be
higher than 100
. If a 500
termination resistor is chosen,
with a system composed of 32 nodes, each R1 or R2 will be
16k
.
In addition, R1 and R2 values should be chosen
between 500
and 16k
at each node.
The CANH and CANL pin can be directly connected to the
CAN bus. A serial common mode inductance can be inserted
in
order
to
improve
electromagnetic
performances both in emission and susceptibility.
compatibility
Minimum Application Configuration
The minimum device configuration is described in
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.
CAUTION : WAKE should not be left open and must be
connected to a known state, i.e GND.
Figure 4. Minimum Application Schematic
WAKE
BATTERY
VBAT
INH
VDD
C1
STB
NERR
TX
RX
GND
RTH
CANH
CANL
RTL
CAN
MODULE
MCU
EN
C2
R2
R1
Vdd
C4
C3
CAN BUS
D1
Vss
MC33388D
5V
Component information:
C1>= 47nF
C2>= 4.7uF
C3>= 47nF
C4>= 10uF
D1: 1N4148
R1=R2=R (500
<R<16k
)
R / number of nodes>100
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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| MC33389CDH | 功能描述:IC SYSTEM BASIS W/CAN 20-HSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
| MC33389CDHR2 | 功能描述:IC SYSTEM BASE W/CAN 20-HSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:4,900 系列:- 控制器类型:USB 2.0 控制器 接口:串行 电源电压:3 V ~ 3.6 V 电流 - 电源:135mA 工作温度:0°C ~ 70°C 安装类型:表面贴装 封装/外壳:36-VFQFN 裸露焊盘 供应商设备封装:36-QFN（6x6） 包装:* 其它名称:Q6396337A |
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