参数资料
型号: MC68HC05V7FN
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC68
封装: PLASTIC, LCC-68
文件页数: 45/170页
文件大小: 589K
代理商: MC68HC05V7FN
SECTION 15: MESSAGE DATA LINK CONTROLLER
MOTOROLA
Page 125
MC68HC05V7 Specification Rev. 1.0
Figure 15-16 :
MDLC Physical Interface Outline
Txp
Rxp
Driver
BUS
PHYSICAL INTERFACE
Sleep/Wake
Prst
VBATT
LOAD
R1
L1
Waveshaper
C1
Sleep & Wake
Rx Comparator
Control
+
-
Vref
REXT1
REXT2
VDD
VSSD
To VDD
+5V
Voltage References &
Control
0.1
F
P6KE15A
0.1
F
0V
+12V
J1850 BUS
31.6 k
1%
24.9 k
1%
MDLC Use
R1
C1
L1
1st node in system
1.5k
±±1%
3300pF/2700pF*
TDK NL322522T-470J-3 (surface)
TDK SP0203-470K-7 (leaded)
All other nodes
10.7k
±±1%
470pF/220pF*
TDK NL322522T-470J-3 (surface)
TDK SP0203-470K-7 (leaded)
All circuit board grounds (
) should be tied to a single point on the circuit board.
The chassis ground (
) should be tied to a single point on the chassis as close to the Bus connector as
possible.
The L1,C1 filter should be located as close to the Bus connector as possible.
R1, REXT1, REXT2 and decoupling capacitors should be located as close as possible to the MDLC
Transient protection circuits are optional and are only examples of how a protection scheme might be
implemented, these devices may not be sufficient for all applications and under all circumstances.
P6KE30A
1N5822
Example VBATT transient protection
VCCA
TSMA16A(surface)
Locate close to
connector
Example
transient/ESD
protection
P4KA16A(leaded)
Both
Notes:
* Values account for load contributions by protection
devices
47
H
Keep lead lengths
to a minimum on
leaded devices
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