参数资料
型号: MC33742EPR2
厂商: Freescale Semiconductor
文件页数: 57/71页
文件大小: 0K
描述: IC SYSTEM BASE W/CAN 48-QFN
标准包装: 2,000
应用: 自动
接口: SPI
电源电压: 5.5 V ~ 18 V
封装/外壳: 48-VFQFN 裸露焊盘
供应商设备封装: 48-QFN-EP(7x7)
包装: 带卷 (TR)
安装类型: 表面贴装
Analog Integrated Circuit Device Data
60
Freescale Semiconductor
33742
TYPICAL APPLICATIONS
POWER-UP AND VDD GOING LOW WITH SLEEP MODE AS DEFAULT LOW POWER MODE IS SELECTED
The first part of Figure 35 is identical to Figure 34. If VDD is pulled below the VDD under-voltage reset (typ 4.6 V), say by an
over-current or short-circuit (for instance, short to 4.0 V), and if the low power mode previously selected was Sleep mode and if
the BATFAIL flag has been cleared, the 33742 enters in Reset mode for a time period of 100 ms. The WDOG pin stays HIGH,
but the high level (VOH) follows VDD level. The RST and INT pins are low. After 100 ms the 33742 goes into Sleep mode, and
the VDD and V2 are off.
Figure 35 shows an example wherein VDD is shorted to 4.0 V, and after 100 ms the 33742 enters Sleep mode.
.
Figure 35. Under-voltage at VDD. Sleep mode selected.
Figure 36. CAN Bus Standard Termination
Figure 37. CAN Bus Split Termination
VDD
SPI (CS)
WD
RST
INT
Watchdog Refresh
Under-voltage at VDD
SBC in
Reset
mode
& Reset modes
Reset each 350 ms
mode
Reset mode
100 ms
SBC in Normal Request
SBC in Normal
SBC in Sleep mode
SBC in Reset mode for
100ms, then enter
Sleep mode
R5
CL
CANL (33742)
CH
CANH (33742)
CAN Connector
CANL
CANH
Legend
R5: 60
CL, CH: 220 pF
R6
CL
CANL (33742)
CH
CANH (33742)
CAN Connector
R7
CS
CANH
CANL
Legend
R6, R7: 30
CL, CH: 220 pF
CS: > 470 pF
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